Add preliminary support for the bundle and unbundle commands

doc/hg.1.txt

@@ -1,725 +1,746 b''
 HG(1)
 =====
 Matt Mackall <[e-mail]>
 
 NAME
 ----
 hg - Mercurial source code management system
 
 SYNOPSIS
 --------
 'hg' [-v -d -q -y] <command> [command options] [files]
 
 DESCRIPTION
 -----------
 The hg(1) command provides a command line interface to the Mercurial system.
 
 OPTIONS
 -------
 
 -R, --repository::
     repository root directory
 
 --cwd::
     change working directory
 
 -y, --noninteractive::
     do not prompt, assume 'yes' for any required answers
 
 -q, --quiet::
     suppress output
 
 -v, --verbose::
     enable additional output
 
 --debug::
     enable debugging output
 
 --traceback::
     print traceback on exception
 
 --time::
     time how long the command takes
 
 --profile::
     print command execution profile
 
 --version::
     output version information and exit
 
 -h, --help::
     display help and exit
 
 COMMAND ELEMENTS
 ----------------
 
 files ...::
     indicates one or more filename or relative path filenames; see
     "FILE NAME PATTERNS" for information on pattern matching
 
 path::
     indicates a path on the local machine
 
 revision::
     indicates a changeset which can be specified as a changeset revision
     number, a tag, or a unique substring of the changeset hash value
 
 repository path::
     either the pathname of a local repository or the URI of a remote
     repository.  There are two available URI protocols, http:// which is
     fast and the old-http:// protocol which is much slower but does not
     require a special server on the web host.
 
 COMMANDS
 --------
 
 add [options] [files ...]::
     Schedule files to be version controlled and added to the repository.
 
     The files will be added to the repository at the next commit.
 
     If no names are given, add all files in the current directory and
     its subdirectories.
 
 addremove [options] [files ...]::
     Add all new files and remove all missing files from the repository.
 
     New files are ignored if they match any of the patterns in .hgignore. As
     with add, these changes take effect at the next commit.
 
 annotate [-r <rev> -u -n -c] [files ...]::
     List changes in files, showing the revision id responsible for each line
 
     This command is useful to discover who did a change or when a change took
     place.
 
     Without the -a option, annotate will avoid processing files it
     detects as binary. With -a, annotate will generate an annotation
     anyway, probably with undesirable results.
 
     options:
     -a, --text            treat all files as text
     -I, --include <pat>   include names matching the given patterns
     -X, --exclude <pat>   exclude names matching the given patterns
     -r, --revision <rev>  annotate the specified revision
     -u, --user            list the author
     -c, --changeset       list the changeset
     -n, --number          list the revision number (default)
 
+bundle <file> <other>::
+    (EXPERIMENTAL)
+
+    Generate a compressed changegroup file collecting all changesets
+    not found in the other repository.
+
+    This file can then be transferred using conventional means and
+    applied to another repository with the unbundle command. This is
+    useful when native push and pull are not available or when
+    exporting an entire repository is undesirable. The standard file
+    extension is ".hg".
+
+    Unlike import/export, this exactly preserves all changeset
+    contents including permissions, rename data, and revision history.
+
 cat <file> [revision]::
     Output to stdout the given revision for the specified file.
 
     If no revision is given then the tip is used.
 
 clone [-U] <source> [dest]::
     Create a copy of an existing repository in a new directory.
 
     If no destination directory name is specified, it defaults to the
     basename of the source.
 
     The source is added to the new repository's .hg/hgrc file to be used in
     future pulls.
 
     For efficiency, hardlinks are used for cloning whenever the
     source and destination are on the same filesystem.
 
     options:
     -U, --noupdate   do not update the new working directory
     -e, --ssh        specify ssh command to use
     --remotecmd      specify hg command to run on the remote side
 
 commit [options] [files...]::
     Commit changes to the given files into the repository.
 
     If a list of files is omitted, all changes reported by "hg status"
     from the root of the repository will be commited.
 
     The HGEDITOR or EDITOR environment variables are used to start an
     editor to add a commit comment.
 
     Options:
 
     -A, --addremove       run addremove during commit
     -I, --include <pat>   include names matching the given patterns
     -X, --exclude <pat>   exclude names matching the given patterns
     -m, --message <text>  use <text> as commit message
     -l, --logfile <file>  read the commit message from <file>
     -d, --date <datecode> record datecode as commit date
     -u, --user <user>     record user as commiter
 
     aliases: ci
 
 copy <source> <dest>::
     Mark <dest> file as a copy or rename of a <source> one
 
     This command takes effect for the next commit.
 
 diff [-a] [-r revision] [-r revision] [files ...]::
     Show differences between revisions for the specified files.
 
     Differences between files are shown using the unified diff format.
 
     When two revision arguments are given, then changes are shown
     between those revisions. If only one revision is specified then
     that revision is compared to the working directory, and, when no
     revisions are specified, the working directory files are compared
     to its parent.
 
     Without the -a option, diff will avoid generating diffs of files
     it detects as binary. With -a, diff will generate a diff anyway,
     probably with undesirable results.
 
     options:
     -a, --text           treat all files as text
     -I, --include <pat>  include names matching the given patterns
     -X, --exclude <pat>  exclude names matching the given patterns
 
 export [-o filespec] [revision] ...::
     Print the changeset header and diffs for one or more revisions.
 
     The information shown in the changeset header is: author,
     changeset hash, parent and commit comment.
 
     Output may be to a file, in which case the name of the file is
     given using a format string.  The formatting rules are as follows:
 
     %%   literal "%" character
     %H   changeset hash (40 bytes of hexadecimal)
     %N   number of patches being generated
     %R   changeset revision number
     %b   basename of the exporting repository
     %h   short-form changeset hash (12 bytes of hexadecimal)
     %n   zero-padded sequence number, starting at 1
     %r   zero-padded changeset revision number
 
     Without the -a option, export will avoid generating diffs of files
     it detects as binary. With -a, export will generate a diff anyway,
     probably with undesirable results.
 
     options:
     -a, --text                treat all files as text
     -o, --output <filespec>   print output to file with formatted named
 
 forget [options] [files]::
     Undo an 'hg add' scheduled for the next commit.
 
     options:
     -I, --include <pat>  include names matching the given patterns
     -X, --exclude <pat>  exclude names matching the given patterns
 
 grep [options] pattern [files]::
     Search revisions of files for a regular expression.
 
     This command behaves differently than Unix grep.  It only accepts
     Python/Perl regexps.  It searches repository history, not the
     working directory.  It always prints the revision number in which
     a match appears.
 
     By default, grep only prints output for the first revision of a
     file in which it finds a match.  To get it to print every revision
     that contains a change in match status ("-" for a match that
     becomes a non-match, or "+" for a non-match that becomes a match),
     use the --all flag.
 
     options:
     -0, --print0              end fields with NUL
     -I, --include <pat>       include names matching the given patterns
     -X, --exclude <pat>       exclude names matching the given patterns
         --all                 print all revisions that match
     -i, --ignore-case         ignore case when matching
     -l, --files-with-matches  print only file names and revs that match
     -n, --line-number         print matching line numbers
     -r <rev>, --rev <rev>     search in given revision range
     -u, --user                print user who committed change
 
 heads::
     Show all repository head changesets.
 
     Repository "heads" are changesets that don't have children
     changesets. They are where development generally takes place and
     are the usual targets for update and merge operations.
 
 identify::
     Print a short summary of the current state of the repo.
 
     This summary identifies the repository state using one or two parent
     hash identifiers, followed by a "+" if there are uncommitted changes
     in the working directory, followed by a list of tags for this revision.
 
     aliases: id
 
 import [-p <n> -b <base> -f] <patches>::
     Import a list of patches and commit them individually.
 
     If there are outstanding changes in the working directory, import
     will abort unless given the -f flag.
 
     If a patch looks like a mail message (its first line starts with
     "From " or looks like an RFC822 header), it will not be applied
     unless the -f option is used.  The importer neither parses nor
     discards mail headers, so use -f only to override the "mailness"
     safety check, not to import a real mail message.
 
     options:
     -p, --strip <n>   directory strip option for patch. This has the same
                       meaning as the corresponding patch option
     -b <path>         base directory to read patches from
     -f, --force       skip check for outstanding uncommitted changes
 
     aliases: patch
 
 incoming [-p] [source]::
     Show new changesets found in the specified repo or the default
     pull repo. These are the changesets that would be pulled if a pull
     was requested.
 
     Currently only local repositories are supported.
 
     options:
     -p, --patch           show patch
 
     aliases: in
 
 init [dest]::
     Initialize a new repository in the given directory.  If the given
     directory does not exist, it is created.
 
     If no directory is given, the current directory is used.
 
 locate [options] [files]::
     Print all files under Mercurial control whose names match the
     given patterns.
 
     This command searches the current directory and its
     subdirectories.  To search an entire repository, move to the root
     of the repository.
 
     If no patterns are given to match, this command prints all file
     names.
 
     If you want to feed the output of this command into the "xargs"
     command, use the "-0" option to both this command and "xargs".
     This will avoid the problem of "xargs" treating single filenames
     that contain white space as multiple file names.
 
     options:
 
     -0, --print0         end filenames with NUL, for use with xargs
     -f, --fullpath       print complete paths from the filesystem root
     -I, --include <pat>  include names matching the given patterns
     -r, --rev <rev>      search the repository as it stood at rev
     -X, --exclude <pat>  exclude names matching the given patterns
 
 log [-r revision ...] [-p] [files]::
     Print the revision history of the specified files or the entire project.
 
     By default this command outputs: changeset id and hash, tags,
     parents, user, date and time, and a summary for each commit. The
     -v switch adds some more detail, such as changed files, manifest
     hashes or message signatures.
 
     options:
     -I, --include <pat>   include names matching the given patterns
     -X, --exclude <pat>   exclude names matching the given patterns
     -r, --rev <A>         show the specified revision or range
     -p, --patch           show patch
 
     aliases: history
 
 manifest [revision]::
     Print a list of version controlled files for the given revision.
 
     The manifest is the list of files being version controlled. If no revision
     is given then the tip is used.
 
 outgoing [-p] [dest]::
     Show changesets not found in the specified destination repo or the
     default push repo. These are the changesets that would be pushed
     if a push was requested.
 
     options:
     -p, --patch           show patch
 
     aliases: out
 
 parents::
     Print the working directory's parent revisions.
 
 paths [NAME]::
     Show definition of symbolic path name NAME. If no name is given, show
     definition of available names.
 
     Path names are defined in the [paths] section of /etc/mercurial/hgrc
     and $HOME/.hgrc.  If run inside a repository, .hg/hgrc is used, too.
 
 pull <repository path>::
     Pull changes from a remote repository to a local one.
 
     This finds all changes from the repository at the specified path
     or URL and adds them to the local repository. By default, this
     does not update the copy of the project in the working directory.
 
     Valid URLs are of the form:
 
       local/filesystem/path
       http://[user@]host[:port][/path]
       https://[user@]host[:port][/path]
       ssh://[user@]host[:port][/path]
 
     SSH requires an accessible shell account on the destination
     machine and a copy of hg in the remote path.
 
     options:
     -u, --update   update the working directory to tip after pull
     -e, --ssh    specify ssh command to use
     --remotecmd  specify hg command to run on the remote side
 
 push <destination>::
     Push changes from the local repository to the given destination.
 
     This is the symmetrical operation for pull. It helps to move
     changes from the current repository to a different one. If the
     destination is local this is identical to a pull in that directory
     from the current one.
 
     By default, push will refuse to run if it detects the result would
     increase the number of remote heads. This generally indicates the
     the client has forgotten to sync and merge before pushing.
 
     Valid URLs are of the form:
 
       local/filesystem/path
       ssh://[user@]host[:port][/path]
 
     SSH requires an accessible shell account on the destination
     machine and a copy of hg in the remote path.
 
     options:
 
     -f, --force  force update
     -e, --ssh    specify ssh command to use
     --remotecmd  specify hg command to run on the remote side
 
 rawcommit [-p -d -u -F -m -l]::
     Lowlevel commit, for use in helper scripts.
 
     This command is not intended to be used by normal users, as it is
     primarily useful for importing from other SCMs.
 
 recover::
     Recover from an interrupted commit or pull.
 
     This command tries to fix the repository status after an interrupted
     operation. It should only be necessary when Mercurial suggests it.
 
 remove [options] [files ...]::
     Schedule the indicated files for removal from the repository.
 
     This command schedules the files to be removed at the next commit.
     This only removes files from the current branch, not from the
     entire project history.
 
     aliases: rm
 
 revert [names ...]::
     Revert any uncommitted modifications made to the named files or
     directories.  This restores the contents of the affected files to
     an unmodified state.
 
     If a file has been deleted, it is recreated.  If the executable
     mode of a file was changed, it is reset.
 
     If a directory is given, all files in that directory and its
     subdirectories are reverted.
 
     If no arguments are given, all files in the current directory and
     its subdirectories are reverted.
 
     options:
     -r, --rev <rev>       revision to revert to
     -n, --nonrecursive    do not recurse into subdirectories
 
 root::
     Print the root directory of the current repository.
 
 serve [options]::
     Start a local HTTP repository browser and pull server.
 
     By default, the server logs accesses to stdout and errors to
     stderr.  Use the "-A" and "-E" options to log to files.
 
     options:
     -A, --accesslog <file>   name of access log file to write to
     -E, --errorlog <file>    name of error log file to write to
     -a, --address <addr>     address to use
     -p, --port <n>           port to use (default: 8000)
     -n, --name <name>        name to show in web pages (default: working dir)
     -t, --templatedir <path> web templates to use
     -6, --ipv6               use IPv6 in addition to IPv4
 
 status [options] [files]::
     Show changed files in the working directory.  If no names are
     given, all files are shown.  Otherwise, only files matching the
     given names are shown.
 
     The codes used to show the status of files are:
 
     M = changed
     A = added
     R = removed
     ? = not tracked
 
     options:
 
     -m, --modified       show only modified files
     -a, --added          show only added files
     -r, --removed        show only removed files
     -u, --unknown        show only unknown (not tracked) files
     -n, --no-status      hide status prefix
     -0, --print0         end filenames with NUL, for use with xargs
     -I, --include <pat>  include names matching the given patterns
     -X, --exclude <pat>  exclude names matching the given patterns
 
 tag [-l -m <text> -d <datecode> -u <user>] <name> [revision]::
     Name a particular revision using <name>.
 
     Tags are used to name particular revisions of the repository and are
     very useful to compare different revision, to go back to significant
     earlier versions or to mark branch points as releases, etc.
 
     If no revision is given, the tip is used.
 
     To facilitate version control, distribution, and merging of tags,
     they are stored as a file named ".hgtags" which is managed
     similarly to other project files and can be hand-edited if
     necessary.
 
     options:
     -l, --local           make the tag local
     -m, --message <text>  message for tag commit log entry
     -d, --date <datecode> datecode for commit
     -u, --user <user>     user for commit
 
     Note: Local tags are not version-controlled or distributed and are
     stored in the .hg/localtags file. If there exists a local tag and
     a public tag with the same name, local tag is used.
 
 tags::
     List the repository tags.
 
     This lists both regular and local tags.
 
 tip::
     Show the tip revision.
 
+unbundle <file>::
+    (EXPERIMENTAL)
+
+    Apply a compressed changegroup file generated by the bundle
+    command.
+
 undo::
     Undo the last commit or pull transaction.
 
     Roll back the last pull or commit transaction on the
     repository, restoring the project to its earlier state.
 
     This command should be used with care. There is only one level of
     undo and there is no redo.
 
     This command is not intended for use on public repositories. Once
     a change is visible for pull by other users, undoing it locally is
     ineffective.
 
 update [-m -C] [revision]::
     Update the working directory to the specified revision.
 
     By default, update will refuse to run if doing so would require
     merging or discarding local changes.
 
     With the -m option, a merge will be performed.
 
     With the -C option, local changes will be lost.
 
     options:
     -m, --merge       allow merging of branches
     -C, --clean       overwrite locally modified files
 
     aliases: up checkout co
 
 verify::
     Verify the integrity of the current repository.
 
     This will perform an extensive check of the repository's
     integrity, validating the hashes and checksums of each entry in
     the changelog, manifest, and tracked files, as well as the
     integrity of their crosslinks and indices.
 
 FILE NAME PATTERNS
 ------------------
 
     Mercurial accepts several notations for identifying one or more
     file at a time.
 
     By default, Mercurial treats file names as shell-style extended
     glob patterns.
 
     Alternate pattern notations must be specified explicitly.
 
     To use a plain path name without any pattern matching, start a
     name with "path:".  These path names must match completely, from
     the root of the current repository.
 
     To use an extended glob, start a name with "glob:".  Globs are
     rooted at the current directory; a glob such as "*.c" will match
     files ending in ".c" in the current directory only.
 
     The supported glob syntax extensions are "**" to match any string
     across path separators, and "{a,b}" to mean "a or b".
 
     To use a Perl/Python regular expression, start a name with "re:".
     Regexp pattern matching is anchored at the root of the repository.
 
     Plain examples:
 
     path:foo/bar   a name bar in a directory named foo in the root of
                    the repository
     path:path:name a file or directory named "path:name"
 
     Glob examples:
 
     glob:*.c       any name ending in ".c" in the current directory
     *.c            any name ending in ".c" in the current directory
     **.c           any name ending in ".c" in the current directory, or
                    any subdirectory
     foo/*.c        any name ending in ".c" in the directory foo
     foo/**.c       any name ending in ".c" in the directory foo, or any
                    subdirectory
 
     Regexp examples:
 
     re:.*\.c$      any name ending in ".c", anywhere in the repository
 
 
 SPECIFYING SINGLE REVISIONS
 ---------------------------
 
     Mercurial accepts several notations for identifying individual
     revisions.
 
     A plain integer is treated as a revision number.  Negative
     integers are treated as offsets from the tip, with -1 denoting the
     tip.
 
     A 40-digit hexadecimal string is treated as a unique revision
     identifier.
 
     A hexadecimal string less than 40 characters long is treated as a
     unique revision identifier, and referred to as a short-form
     identifier.  A short-form identifier is only valid if it is the
     prefix of one full-length identifier.
 
     Any other string is treated as a tag name, which is a symbolic
     name associated with a revision identifier.  Tag names may not
     contain the ":" character.
 
     The reserved name "tip" is a special tag that always identifies
     the most recent revision.
 
 SPECIFYING MULTIPLE REVISIONS
 -----------------------------
 
     When Mercurial accepts more than one revision, they may be
     specified individually, or provided as a continuous range,
     separated by the ":" character.
 
     The syntax of range notation is [BEGIN]:[END], where BEGIN and END
     are revision identifiers.  Both BEGIN and END are optional.  If
     BEGIN is not specified, it defaults to revision number 0.  If END
     is not specified, it defaults to the tip.  The range ":" thus
     means "all revisions".
 
     If BEGIN is greater than END, revisions are treated in reverse
     order.
 
     A range acts as a closed interval.  This means that a range of 3:5
     gives 3, 4 and 5.  Similarly, a range of 4:2 gives 4, 3, and 2.
 
 ENVIRONMENT VARIABLES
 ---------------------
 
 HGEDITOR::
     This is the name of the editor to use when committing. Defaults to the
     value of EDITOR.
 
     (deprecated, use .hgrc)
 
 HGMERGE::
     An executable to use for resolving merge conflicts. The program
     will be executed with three arguments: local file, remote file,
     ancestor file.
 
     The default program is "hgmerge", which is a shell script provided
     by Mercurial with some sensible defaults.
 
     (deprecated, use .hgrc)
 
 HGUSER::
     This is the string used for the author of a commit.
 
     (deprecated, use .hgrc)
 
 EMAIL::
     If HGUSER is not set, this will be used as the author for a commit.
 
 LOGNAME::
     If neither HGUSER nor EMAIL is set, LOGNAME will be used (with
     '@hostname' appended) as the author value for a commit.
 
 EDITOR::
     This is the name of the editor used in the hgmerge script. It will be
     used for commit messages if HGEDITOR isn't set. Defaults to 'vi'.
 
 PYTHONPATH::
     This is used by Python to find imported modules and may need to be set
     appropriately if Mercurial is not installed system-wide.
 
 FILES
 -----
  .hgignore::
     This file contains regular expressions (one per line) that describe file
     names that should be ignored by hg.
 
  .hgtags::
     This file contains changeset hash values and text tag names (one of each
     separated by spaces) that correspond to tagged versions of the repository
     contents.
 
  /etc/mercurial/hgrc, $HOME/.hgrc, .hg/hgrc::
     This file contains defaults and configuration. Values in .hg/hgrc
     override those in $HOME/.hgrc, and these override settings made in the
     global /etc/mercurial/hgrc configuration.  See hgrc(5) for details of
     the contents and format of these files.
 
 BUGS
 ----
 Probably lots, please post them to the mailing list (See Resources below)
 when you find them.
 
 SEE ALSO
 --------
 hgrc(5)
 
 AUTHOR
 ------
 Written by Matt Mackall <[e-mail]>
 
 RESOURCES
 ---------
 http://selenic.com/mercurial[Main Web Site]
 
 http://www.serpentine.com/mercurial[Wiki site]
 
 http://selenic.com/hg[Source code repository]
 
 http://selenic.com/mailman/listinfo/mercurial[Mailing list]
 
 COPYING
 -------
 Copyright (C) 2005 Matt Mackall.
 Free use of this software is granted under the terms of the GNU General
 Public License (GPL).

mercurial/commands.py

@@ -1,2014 +1,2066 b''
 # commands.py - command processing for mercurial
 #
 # Copyright 2005 Matt Mackall <[e-mail]>
 #
 # This software may be used and distributed according to the terms
 # of the GNU General Public License, incorporated herein by reference.
 
 from demandload import demandload
 from node import *
-demandload(globals(), "os re sys signal shutil imp")
+demandload(globals(), "os re sys signal shutil imp urllib")
 demandload(globals(), "fancyopts ui hg util lock revlog")
 demandload(globals(), "fnmatch hgweb mdiff random signal time traceback")
-demandload(globals(), "errno socket version struct atexit sets")
+demandload(globals(), "errno socket version struct atexit sets bz2")
 
 class UnknownCommand(Exception):
     """Exception raised if command is not in the command table."""
 
 def filterfiles(filters, files):
     l = [x for x in files if x in filters]
 
     for t in filters:
         if t and t[-1] != "/":
             t += "/"
         l += [x for x in files if x.startswith(t)]
     return l
 
 def relpath(repo, args):
     cwd = repo.getcwd()
     if cwd:
         return [util.normpath(os.path.join(cwd, x)) for x in args]
     return args
 
 def matchpats(repo, cwd, pats=[], opts={}, head=''):
     return util.matcher(repo.root, cwd, pats or ['.'], opts.get('include'),
                         opts.get('exclude'), head)
 
 def makewalk(repo, pats, opts, head=''):
     cwd = repo.getcwd()
     files, matchfn, anypats = matchpats(repo, cwd, pats, opts, head)
     exact = dict(zip(files, files))
     def walk():
         for src, fn in repo.walk(files=files, match=matchfn):
             yield src, fn, util.pathto(cwd, fn), fn in exact
     return files, matchfn, walk()
 
 def walk(repo, pats, opts, head=''):
     files, matchfn, results = makewalk(repo, pats, opts, head)
     for r in results:
         yield r
 
 def walkchangerevs(ui, repo, cwd, pats, opts):
     '''Iterate over files and the revs they changed in.
 
     Callers most commonly need to iterate backwards over the history
     it is interested in.  Doing so has awful (quadratic-looking)
     performance, so we use iterators in a "windowed" way.
 
     We walk a window of revisions in the desired order.  Within the
     window, we first walk forwards to gather data, then in the desired
     order (usually backwards) to display it.
 
     This function returns an (iterator, getchange) pair.  The
     getchange function returns the changelog entry for a numeric
     revision.  The iterator yields 3-tuples.  They will be of one of
     the following forms:
 
     "window", incrementing, lastrev: stepping through a window,
     positive if walking forwards through revs, last rev in the
     sequence iterated over - use to reset state for the current window
 
     "add", rev, fns: out-of-order traversal of the given file names
     fns, which changed during revision rev - use to gather data for
     possible display
 
     "iter", rev, None: in-order traversal of the revs earlier iterated
     over with "add" - use to display data'''
     cwd = repo.getcwd()
     if not pats and cwd:
         opts['include'] = [os.path.join(cwd, i) for i in opts['include']]
         opts['exclude'] = [os.path.join(cwd, x) for x in opts['exclude']]
     files, matchfn, anypats = matchpats(repo, (pats and cwd) or '',
                                         pats, opts)
     revs = map(int, revrange(ui, repo, opts['rev'] or ['tip:0']))
     wanted = {}
     slowpath = anypats
     window = 300
     fncache = {}
 
     chcache = {}
     def getchange(rev):
         ch = chcache.get(rev)
         if ch is None:
             chcache[rev] = ch = repo.changelog.read(repo.lookup(str(rev)))
         return ch
 
     if not slowpath and not files:
         # No files, no patterns.  Display all revs.
         wanted = dict(zip(revs, revs))
     if not slowpath:
         # Only files, no patterns.  Check the history of each file.
         def filerevgen(filelog):
             for i in xrange(filelog.count() - 1, -1, -window):
                 revs = []
                 for j in xrange(max(0, i - window), i + 1):
                     revs.append(filelog.linkrev(filelog.node(j)))
                 revs.reverse()
                 for rev in revs:
                     yield rev
 
         minrev, maxrev = min(revs), max(revs)
         for file in files:
             filelog = repo.file(file)
             # A zero count may be a directory or deleted file, so
             # try to find matching entries on the slow path.
             if filelog.count() == 0:
                 slowpath = True
                 break
             for rev in filerevgen(filelog):
                 if rev <= maxrev:
                     if rev < minrev:
                         break
                     fncache.setdefault(rev, [])
                     fncache[rev].append(file)
                     wanted[rev] = 1
     if slowpath:
         # The slow path checks files modified in every changeset.
         def changerevgen():
             for i in xrange(repo.changelog.count() - 1, -1, -window):
                 for j in xrange(max(0, i - window), i + 1):
                     yield j, getchange(j)[3]
 
         for rev, changefiles in changerevgen():
             matches = filter(matchfn, changefiles)
             if matches:
                 fncache[rev] = matches
                 wanted[rev] = 1
 
     def iterate():
         for i in xrange(0, len(revs), window):
             yield 'window', revs[0] < revs[-1], revs[-1]
             nrevs = [rev for rev in revs[i:min(i+window, len(revs))]
                      if rev in wanted]
             srevs = list(nrevs)
             srevs.sort()
             for rev in srevs:
                 fns = fncache.get(rev) or filter(matchfn, getchange(rev)[3])
                 yield 'add', rev, fns
             for rev in nrevs:
                 yield 'iter', rev, None
     return iterate(), getchange
 
 revrangesep = ':'
 
 def revrange(ui, repo, revs, revlog=None):
     """Yield revision as strings from a list of revision specifications."""
     if revlog is None:
         revlog = repo.changelog
     revcount = revlog.count()
     def fix(val, defval):
         if not val:
             return defval
         try:
             num = int(val)
             if str(num) != val:
                 raise ValueError
             if num < 0:
                 num += revcount
             if not (0 <= num < revcount):
                 raise ValueError
         except ValueError:
             try:
                 num = repo.changelog.rev(repo.lookup(val))
             except KeyError:
                 try:
                     num = revlog.rev(revlog.lookup(val))
                 except KeyError:
                     raise util.Abort('invalid revision identifier %s', val)
         return num
     seen = {}
     for spec in revs:
         if spec.find(revrangesep) >= 0:
             start, end = spec.split(revrangesep, 1)
             start = fix(start, 0)
             end = fix(end, revcount - 1)
             step = start > end and -1 or 1
             for rev in xrange(start, end+step, step):
                 if rev in seen: continue
                 seen[rev] = 1
                 yield str(rev)
         else:
             rev = fix(spec, None)
             if rev in seen: continue
             seen[rev] = 1
             yield str(rev)
 
 def make_filename(repo, r, pat, node=None,
                   total=None, seqno=None, revwidth=None):
     node_expander = {
         'H': lambda: hex(node),
         'R': lambda: str(r.rev(node)),
         'h': lambda: short(node),
         }
     expander = {
         '%': lambda: '%',
         'b': lambda: os.path.basename(repo.root),
         }
 
     try:
         if node:
             expander.update(node_expander)
         if node and revwidth is not None:
             expander['r'] = lambda: str(r.rev(node)).zfill(revwidth)
         if total is not None:
             expander['N'] = lambda: str(total)
         if seqno is not None:
             expander['n'] = lambda: str(seqno)
         if total is not None and seqno is not None:
             expander['n'] = lambda:str(seqno).zfill(len(str(total)))
 
         newname = []
         patlen = len(pat)
         i = 0
         while i < patlen:
             c = pat[i]
             if c == '%':
                 i += 1
                 c = pat[i]
                 c = expander[c]()
             newname.append(c)
             i += 1
         return ''.join(newname)
     except KeyError, inst:
         raise util.Abort("invalid format spec '%%%s' in output file name",
                     inst.args[0])
 
 def make_file(repo, r, pat, node=None,
               total=None, seqno=None, revwidth=None, mode='wb'):
     if not pat or pat == '-':
         return 'w' in mode and sys.stdout or sys.stdin
     if hasattr(pat, 'write') and 'w' in mode:
         return pat
     if hasattr(pat, 'read') and 'r' in mode:
         return pat
     return open(make_filename(repo, r, pat, node, total, seqno, revwidth),
                 mode)
 
 def dodiff(fp, ui, repo, node1, node2, files=None, match=util.always,
            changes=None, text=False):
     def date(c):
         return time.asctime(time.gmtime(float(c[2].split(' ')[0])))
 
     if not changes:
         (c, a, d, u) = repo.changes(node1, node2, files, match=match)
     else:
         (c, a, d, u) = changes
     if files:
         c, a, d = map(lambda x: filterfiles(files, x), (c, a, d))
 
     if not c and not a and not d:
         return
 
     if node2:
         change = repo.changelog.read(node2)
         mmap2 = repo.manifest.read(change[0])
         date2 = date(change)
         def read(f):
             return repo.file(f).read(mmap2[f])
     else:
         date2 = time.asctime()
         if not node1:
             node1 = repo.dirstate.parents()[0]
         def read(f):
             return repo.wfile(f).read()
 
     if ui.quiet:
         r = None
     else:
         hexfunc = ui.verbose and hex or short
         r = [hexfunc(node) for node in [node1, node2] if node]
 
     change = repo.changelog.read(node1)
     mmap = repo.manifest.read(change[0])
     date1 = date(change)
 
     for f in c:
         to = None
         if f in mmap:
             to = repo.file(f).read(mmap[f])
         tn = read(f)
         fp.write(mdiff.unidiff(to, date1, tn, date2, f, r, text=text))
     for f in a:
         to = None
         tn = read(f)
         fp.write(mdiff.unidiff(to, date1, tn, date2, f, r, text=text))
     for f in d:
         to = repo.file(f).read(mmap[f])
         tn = None
         fp.write(mdiff.unidiff(to, date1, tn, date2, f, r, text=text))
 
 def trimuser(ui, name, rev, revcache):
     """trim the name of the user who committed a change"""
     user = revcache.get(rev)
     if user is None:
         user = revcache[rev] = ui.shortuser(name)
     return user
 
 def show_changeset(ui, repo, rev=0, changenode=None, brinfo=None):
     """show a single changeset or file revision"""
     log = repo.changelog
     if changenode is None:
         changenode = log.node(rev)
     elif not rev:
         rev = log.rev(changenode)
 
     if ui.quiet:
         ui.write("%d:%s\n" % (rev, short(changenode)))
         return
 
     changes = log.read(changenode)
 
     t, tz = changes[2].split(' ')
     # a conversion tool was sticking non-integer offsets into repos
     try:
         tz = int(tz)
     except ValueError:
         tz = 0
     date = time.asctime(time.localtime(float(t))) + " %+05d" % (int(tz)/-36)
 
     parents = [(log.rev(p), ui.verbose and hex(p) or short(p))
                for p in log.parents(changenode)
                if ui.debugflag or p != nullid]
     if not ui.debugflag and len(parents) == 1 and parents[0][0] == rev-1:
         parents = []
 
     if ui.verbose:
         ui.write("changeset:   %d:%s\n" % (rev, hex(changenode)))
     else:
         ui.write("changeset:   %d:%s\n" % (rev, short(changenode)))
 
     for tag in repo.nodetags(changenode):
         ui.status("tag:         %s\n" % tag)
     for parent in parents:
         ui.write("parent:      %d:%s\n" % parent)
 
     if brinfo and changenode in brinfo:
         br = brinfo[changenode]
         ui.write("branch:      %s\n" % " ".join(br))
 
     ui.debug("manifest:    %d:%s\n" % (repo.manifest.rev(changes[0]),
                                       hex(changes[0])))
     ui.status("user:        %s\n" % changes[1])
     ui.status("date:        %s\n" % date)
 
     if ui.debugflag:
         files = repo.changes(log.parents(changenode)[0], changenode)
         for key, value in zip(["files:", "files+:", "files-:"], files):
             if value:
                 ui.note("%-12s %s\n" % (key, " ".join(value)))
     else:
         ui.note("files:       %s\n" % " ".join(changes[3]))
 
     description = changes[4].strip()
     if description:
         if ui.verbose:
             ui.status("description:\n")
             ui.status(description)
             ui.status("\n\n")
         else:
             ui.status("summary:     %s\n" % description.splitlines()[0])
     ui.status("\n")
 
 def show_version(ui):
     """output version and copyright information"""
     ui.write("Mercurial Distributed SCM (version %s)\n"
              % version.get_version())
     ui.status(
         "\nCopyright (C) 2005 Matt Mackall <[e-mail]>\n"
         "This is free software; see the source for copying conditions. "
         "There is NO\nwarranty; "
         "not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n"
     )
 
 def help_(ui, cmd=None, with_version=False):
     """show help for a given command or all commands"""
     option_lists = []
     if cmd and cmd != 'shortlist':
         if with_version:
             show_version(ui)
             ui.write('\n')
         key, i = find(cmd)
         # synopsis
         ui.write("%s\n\n" % i[2])
 
         # description
         doc = i[0].__doc__
         if ui.quiet:
             doc = doc.splitlines(0)[0]
         ui.write("%s\n" % doc.rstrip())
 
         if not ui.quiet:
             # aliases
             aliases = ', '.join(key.split('|')[1:])
             if aliases:
                 ui.write("\naliases: %s\n" % aliases)
 
             # options
             if i[1]:
                 option_lists.append(("options", i[1]))
 
     else:
         # program name
         if ui.verbose or with_version:
             show_version(ui)
         else:
             ui.status("Mercurial Distributed SCM\n")
         ui.status('\n')
 
         # list of commands
         if cmd == "shortlist":
             ui.status('basic commands (use "hg help" '
                       'for the full list or option "-v" for details):\n\n')
         elif ui.verbose:
             ui.status('list of commands:\n\n')
         else:
             ui.status('list of commands (use "hg help -v" '
                       'to show aliases and global options):\n\n')
 
         h = {}
         cmds = {}
         for c, e in table.items():
             f = c.split("|")[0]
             if cmd == "shortlist" and not f.startswith("^"):
                 continue
             f = f.lstrip("^")
             if not ui.debugflag and f.startswith("debug"):
                 continue
             d = ""
             if e[0].__doc__:
                 d = e[0].__doc__.splitlines(0)[0].rstrip()
             h[f] = d
             cmds[f]=c.lstrip("^")
 
         fns = h.keys()
         fns.sort()
         m = max(map(len, fns))
         for f in fns:
             if ui.verbose:
                 commands = cmds[f].replace("|",", ")
                 ui.write(" %s:\n      %s\n"%(commands,h[f]))
             else:
                 ui.write(' %-*s   %s\n' % (m, f, h[f]))
 
     # global options
     if ui.verbose:
         option_lists.append(("global options", globalopts))
 
     # list all option lists
     opt_output = []
     for title, options in option_lists:
         opt_output.append(("\n%s:\n" % title, None))
         for shortopt, longopt, default, desc in options:
             opt_output.append(("%2s%s" % (shortopt and "-%s" % shortopt,
                                           longopt and " --%s" % longopt),
                                "%s%s" % (desc,
                                          default and " (default: %s)" % default
                                          or "")))
 
     if opt_output:
         opts_len = max([len(line[0]) for line in opt_output if line[1]])
         for first, second in opt_output:
             if second:
                 ui.write(" %-*s  %s\n" % (opts_len, first, second))
             else:
                 ui.write("%s\n" % first)
 
 # Commands start here, listed alphabetically
 
 def add(ui, repo, *pats, **opts):
     '''add the specified files on the next commit'''
     names = []
     for src, abs, rel, exact in walk(repo, pats, opts):
         if exact:
             names.append(abs)
         elif repo.dirstate.state(abs) == '?':
             ui.status('adding %s\n' % rel)
             names.append(abs)
     repo.add(names)
 
 def addremove(ui, repo, *pats, **opts):
     """add all new files, delete all missing files"""
     add, remove = [], []
     for src, abs, rel, exact in walk(repo, pats, opts):
         if src == 'f' and repo.dirstate.state(abs) == '?':
             add.append(abs)
             if not exact:
                 ui.status('adding ', rel, '\n')
         if repo.dirstate.state(abs) != 'r' and not os.path.exists(rel):
             remove.append(abs)
             if not exact:
                 ui.status('removing ', rel, '\n')
     repo.add(add)
     repo.remove(remove)
 
 def annotate(ui, repo, *pats, **opts):
     """show changeset information per file line"""
     def getnode(rev):
         return short(repo.changelog.node(rev))
 
     ucache = {}
     def getname(rev):
         cl = repo.changelog.read(repo.changelog.node(rev))
         return trimuser(ui, cl[1], rev, ucache)
 
     if not pats:
         raise util.Abort('at least one file name or pattern required')
 
     opmap = [['user', getname], ['number', str], ['changeset', getnode]]
     if not opts['user'] and not opts['changeset']:
         opts['number'] = 1
 
     if opts['rev']:
         node = repo.changelog.lookup(opts['rev'])
     else:
         node = repo.dirstate.parents()[0]
     change = repo.changelog.read(node)
     mmap = repo.manifest.read(change[0])
 
     for src, abs, rel, exact in walk(repo, pats, opts):
         if abs not in mmap:
             ui.warn("warning: %s is not in the repository!\n" % rel)
             continue
 
         f = repo.file(abs)
         if not opts['text'] and util.binary(f.read(mmap[abs])):
             ui.write("%s: binary file\n" % rel)
             continue
 
         lines = f.annotate(mmap[abs])
         pieces = []
 
         for o, f in opmap:
             if opts[o]:
                 l = [f(n) for n, dummy in lines]
                 if l:
                     m = max(map(len, l))
                     pieces.append(["%*s" % (m, x) for x in l])
 
         if pieces:
             for p, l in zip(zip(*pieces), lines):
                 ui.write("%s: %s" % (" ".join(p), l[1]))
 
+def bundle(ui, repo, fname, dest="default-push", **opts):
+    """create a changegroup file"""
+    f = open(fname, "wb")
+    dest = ui.expandpath(dest)
+    other = hg.repository(ui, dest)
+    o = repo.findoutgoing(other)
+    cg = repo.changegroup(o)
+
+    try:
+        f.write("HG10")
+        z = bz2.BZ2Compressor(9)
+        while 1:
+            chunk = cg.read(4096)
+            if not chunk:
+                break
+            f.write(z.compress(chunk))
+        f.write(z.flush())
+    except:
+        os.unlink(fname)
+
 def cat(ui, repo, file1, rev=None, **opts):
     """output the latest or given revision of a file"""
     r = repo.file(relpath(repo, [file1])[0])
     if rev:
         try:
             # assume all revision numbers are for changesets
             n = repo.lookup(rev)
             change = repo.changelog.read(n)
             m = repo.manifest.read(change[0])
             n = m[relpath(repo, [file1])[0]]
         except hg.RepoError, KeyError:
             n = r.lookup(rev)
     else:
         n = r.tip()
     fp = make_file(repo, r, opts['output'], node=n)
     fp.write(r.read(n))
 
 def clone(ui, source, dest=None, **opts):
     """make a copy of an existing repository"""
     if dest is None:
         dest = os.path.basename(os.path.normpath(source))
 
     if os.path.exists(dest):
         ui.warn("abort: destination '%s' already exists\n" % dest)
         return 1
 
     dest = os.path.realpath(dest)
 
     class Dircleanup:
         def __init__(self, dir_):
             self.rmtree = shutil.rmtree
             self.dir_ = dir_
             os.mkdir(dir_)
         def close(self):
             self.dir_ = None
         def __del__(self):
             if self.dir_:
                 self.rmtree(self.dir_, True)
 
     if opts['ssh']:
         ui.setconfig("ui", "ssh", opts['ssh'])
     if opts['remotecmd']:
         ui.setconfig("ui", "remotecmd", opts['remotecmd'])
 
     d = Dircleanup(dest)
     source = ui.expandpath(source)
     abspath = source
     other = hg.repository(ui, source)
 
     if other.dev() != -1:
         abspath = os.path.abspath(source)
         copyfile = (os.stat(dest).st_dev == other.dev()
                     and getattr(os, 'link', None) or shutil.copy2)
         if copyfile is not shutil.copy2:
             ui.note("cloning by hardlink\n")
 
         # we use a lock here because if we race with commit, we can
         # end up with extra data in the cloned revlogs that's not
         # pointed to by changesets, thus causing verify to fail
         l1 = lock.lock(os.path.join(source, ".hg", "lock"))
 
         # and here to avoid premature writing to the target
         os.mkdir(os.path.join(dest, ".hg"))
         l2 = lock.lock(os.path.join(dest, ".hg", "lock"))
 
         files = "data 00manifest.d 00manifest.i 00changelog.d 00changelog.i"
         for f in files.split():
             src = os.path.join(source, ".hg", f)
             dst = os.path.join(dest, ".hg", f)
             util.copyfiles(src, dst, copyfile)
 
         repo = hg.repository(ui, dest)
 
     else:
         repo = hg.repository(ui, dest, create=1)
         repo.pull(other)
 
     f = repo.opener("hgrc", "w")
     f.write("[paths]\n")
     f.write("default = %s\n" % abspath)
 
     if not opts['noupdate']:
         update(ui, repo)
 
     d.close()
 
 def commit(ui, repo, *pats, **opts):
     """commit the specified files or all outstanding changes"""
     if opts['text']:
         ui.warn("Warning: -t and --text is deprecated,"
                 " please use -m or --message instead.\n")
     message = opts['message'] or opts['text']
     logfile = opts['logfile']
     if not message and logfile:
         try:
             if logfile == '-':
                 message = sys.stdin.read()
             else:
                 message = open(logfile).read()
         except IOError, why:
             ui.warn("Can't read commit message %s: %s\n" % (logfile, why))
 
     if opts['addremove']:
         addremove(ui, repo, *pats, **opts)
     cwd = repo.getcwd()
     if not pats and cwd:
         opts['include'] = [os.path.join(cwd, i) for i in opts['include']]
         opts['exclude'] = [os.path.join(cwd, x) for x in opts['exclude']]
     fns, match, anypats = matchpats(repo, (pats and repo.getcwd()) or '',
                                     pats, opts)
     if pats:
         c, a, d, u = repo.changes(files=fns, match=match)
         files = c + a + [fn for fn in d if repo.dirstate.state(fn) == 'r']
     else:
         files = []
     try:
         repo.commit(files, message, opts['user'], opts['date'], match)
     except ValueError, inst:
         raise util.Abort(str(inst))
 
 def copy(ui, repo, source, dest):
     """mark a file as copied or renamed for the next commit"""
     return repo.copy(*relpath(repo, (source, dest)))
 
 def debugcheckstate(ui, repo):
     """validate the correctness of the current dirstate"""
     parent1, parent2 = repo.dirstate.parents()
     repo.dirstate.read()
     dc = repo.dirstate.map
     keys = dc.keys()
     keys.sort()
     m1n = repo.changelog.read(parent1)[0]
     m2n = repo.changelog.read(parent2)[0]
     m1 = repo.manifest.read(m1n)
     m2 = repo.manifest.read(m2n)
     errors = 0
     for f in dc:
         state = repo.dirstate.state(f)
         if state in "nr" and f not in m1:
             ui.warn("%s in state %s, but not in manifest1\n" % (f, state))
             errors += 1
         if state in "a" and f in m1:
             ui.warn("%s in state %s, but also in manifest1\n" % (f, state))
             errors += 1
         if state in "m" and f not in m1 and f not in m2:
             ui.warn("%s in state %s, but not in either manifest\n" %
                     (f, state))
             errors += 1
     for f in m1:
         state = repo.dirstate.state(f)
         if state not in "nrm":
             ui.warn("%s in manifest1, but listed as state %s" % (f, state))
             errors += 1
     if errors:
         raise util.Abort(".hg/dirstate inconsistent with current parent's manifest")
 
 def debugconfig(ui):
     """show combined config settings from all hgrc files"""
     try:
         repo = hg.repository(ui)
     except hg.RepoError:
         pass
     for section, name, value in ui.walkconfig():
         ui.write('%s.%s=%s\n' % (section, name, value))
 
 def debugstate(ui, repo):
     """show the contents of the current dirstate"""
     repo.dirstate.read()
     dc = repo.dirstate.map
     keys = dc.keys()
     keys.sort()
     for file_ in keys:
         ui.write("%c %3o %10d %s %s\n"
                  % (dc[file_][0], dc[file_][1] & 0777, dc[file_][2],
                     time.strftime("%x %X",
                                   time.localtime(dc[file_][3])), file_))
     for f in repo.dirstate.copies:
         ui.write("copy: %s -> %s\n" % (repo.dirstate.copies[f], f))
 
 def debugdata(ui, file_, rev):
     """dump the contents of an data file revision"""
     r = revlog.revlog(file, file_[:-2] + ".i", file_)
     ui.write(r.revision(r.lookup(rev)))
 
 def debugindex(ui, file_):
     """dump the contents of an index file"""
     r = revlog.revlog(file, file_, "")
     ui.write("   rev    offset  length   base linkrev" +
              " nodeid       p1           p2\n")
     for i in range(r.count()):
         e = r.index[i]
         ui.write("% 6d % 9d % 7d % 6d % 7d %s %s %s\n" % (
                 i, e[0], e[1], e[2], e[3],
             short(e[6]), short(e[4]), short(e[5])))
 
 def debugindexdot(ui, file_):
     """dump an index DAG as a .dot file"""
     r = revlog.revlog(file, file_, "")
     ui.write("digraph G {\n")
     for i in range(r.count()):
         e = r.index[i]
         ui.write("\t%d -> %d\n" % (r.rev(e[4]), i))
         if e[5] != nullid:
             ui.write("\t%d -> %d\n" % (r.rev(e[5]), i))
     ui.write("}\n")
 
 def debugrename(ui, repo, file, rev=None):
     """dump rename information"""
     r = repo.file(relpath(repo, [file])[0])
     if rev:
         try:
             # assume all revision numbers are for changesets
             n = repo.lookup(rev)
             change = repo.changelog.read(n)
             m = repo.manifest.read(change[0])
             n = m[relpath(repo, [file])[0]]
         except hg.RepoError, KeyError:
             n = r.lookup(rev)
     else:
         n = r.tip()
     m = r.renamed(n)
     if m:
         ui.write("renamed from %s:%s\n" % (m[0], hex(m[1])))
     else:
         ui.write("not renamed\n")
 
 def debugwalk(ui, repo, *pats, **opts):
     """show how files match on given patterns"""
     items = list(walk(repo, pats, opts))
     if not items:
         return
     fmt = '%%s  %%-%ds  %%-%ds  %%s\n' % (
         max([len(abs) for (src, abs, rel, exact) in items]),
         max([len(rel) for (src, abs, rel, exact) in items]))
     for src, abs, rel, exact in items:
         ui.write(fmt % (src, abs, rel, exact and 'exact' or ''))
 
 def diff(ui, repo, *pats, **opts):
     """diff working directory (or selected files)"""
     node1, node2 = None, None
     revs = [repo.lookup(x) for x in opts['rev']]
 
     if len(revs) > 0:
         node1 = revs[0]
     if len(revs) > 1:
         node2 = revs[1]
     if len(revs) > 2:
         raise util.Abort("too many revisions to diff")
 
     files = []
     match = util.always
     if pats:
         roots, match, results = makewalk(repo, pats, opts)
         for src, abs, rel, exact in results:
             files.append(abs)
 
     dodiff(sys.stdout, ui, repo, node1, node2, files, match=match,
            text=opts['text'])
 
 def doexport(ui, repo, changeset, seqno, total, revwidth, opts):
     node = repo.lookup(changeset)
     prev, other = repo.changelog.parents(node)
     change = repo.changelog.read(node)
 
     fp = make_file(repo, repo.changelog, opts['output'],
                    node=node, total=total, seqno=seqno,
                    revwidth=revwidth)
     if fp != sys.stdout:
         ui.note("%s\n" % fp.name)
 
     fp.write("# HG changeset patch\n")
     fp.write("# User %s\n" % change[1])
     fp.write("# Node ID %s\n" % hex(node))
     fp.write("# Parent  %s\n" % hex(prev))
     if other != nullid:
         fp.write("# Parent  %s\n" % hex(other))
     fp.write(change[4].rstrip())
     fp.write("\n\n")
 
     dodiff(fp, ui, repo, prev, node, text=opts['text'])
     if fp != sys.stdout:
         fp.close()
 
 def export(ui, repo, *changesets, **opts):
     """dump the header and diffs for one or more changesets"""
     if not changesets:
         raise util.Abort("export requires at least one changeset")
     seqno = 0
     revs = list(revrange(ui, repo, changesets))
     total = len(revs)
     revwidth = max(map(len, revs))
     ui.note(len(revs) > 1 and "Exporting patches:\n" or "Exporting patch:\n")
     for cset in revs:
         seqno += 1
         doexport(ui, repo, cset, seqno, total, revwidth, opts)
 
 def forget(ui, repo, *pats, **opts):
     """don't add the specified files on the next commit"""
     forget = []
     for src, abs, rel, exact in walk(repo, pats, opts):
         if repo.dirstate.state(abs) == 'a':
             forget.append(abs)
             if not exact:
                 ui.status('forgetting ', rel, '\n')
     repo.forget(forget)
 
 def grep(ui, repo, pattern, *pats, **opts):
     """search for a pattern in specified files and revisions"""
     reflags = 0
     if opts['ignore_case']:
         reflags |= re.I
     regexp = re.compile(pattern, reflags)
     sep, eol = ':', '\n'
     if opts['print0']:
         sep = eol = '\0'
 
     fcache = {}
     def getfile(fn):
         if fn not in fcache:
             fcache[fn] = repo.file(fn)
         return fcache[fn]
 
     def matchlines(body):
         begin = 0
         linenum = 0
         while True:
             match = regexp.search(body, begin)
             if not match:
                 break
             mstart, mend = match.span()
             linenum += body.count('\n', begin, mstart) + 1
             lstart = body.rfind('\n', begin, mstart) + 1 or begin
             lend = body.find('\n', mend)
             yield linenum, mstart - lstart, mend - lstart, body[lstart:lend]
             begin = lend + 1
 
     class linestate:
         def __init__(self, line, linenum, colstart, colend):
             self.line = line
             self.linenum = linenum
             self.colstart = colstart
             self.colend = colend
         def __eq__(self, other):
             return self.line == other.line
         def __hash__(self):
             return hash(self.line)
 
     matches = {}
     def grepbody(fn, rev, body):
         matches[rev].setdefault(fn, {})
         m = matches[rev][fn]
         for lnum, cstart, cend, line in matchlines(body):
             s = linestate(line, lnum, cstart, cend)
             m[s] = s
 
     prev = {}
     ucache = {}
     def display(fn, rev, states, prevstates):
         diff = list(sets.Set(states).symmetric_difference(sets.Set(prevstates)))
         diff.sort(lambda x, y: cmp(x.linenum, y.linenum))
         counts = {'-': 0, '+': 0}
         filerevmatches = {}
         for l in diff:
             if incrementing or not opts['all']:
                 change = ((l in prevstates) and '-') or '+'
                 r = rev
             else:
                 change = ((l in states) and '-') or '+'
                 r = prev[fn]
             cols = [fn, str(rev)]
             if opts['line_number']: cols.append(str(l.linenum))
             if opts['all']: cols.append(change)
             if opts['user']: cols.append(trimuser(ui, getchange(rev)[1], rev,
                                                   ucache))
             if opts['files_with_matches']:
                 c = (fn, rev)
                 if c in filerevmatches: continue
                 filerevmatches[c] = 1
             else:
                 cols.append(l.line)
             ui.write(sep.join(cols), eol)
             counts[change] += 1
         return counts['+'], counts['-']
 
     fstate = {}
     skip = {}
     changeiter, getchange = walkchangerevs(ui, repo, repo.getcwd(), pats, opts)
     count = 0
     for st, rev, fns in changeiter:
         if st == 'window':
             incrementing = rev
             matches.clear()
         elif st == 'add':
             change = repo.changelog.read(repo.lookup(str(rev)))
             mf = repo.manifest.read(change[0])
             matches[rev] = {}
             for fn in fns:
                 if fn in skip: continue
                 fstate.setdefault(fn, {})
                 try:
                     grepbody(fn, rev, getfile(fn).read(mf[fn]))
                 except KeyError:
                     pass
         elif st == 'iter':
             states = matches[rev].items()
             states.sort()
             for fn, m in states:
                 if fn in skip: continue
                 if incrementing or not opts['all'] or fstate[fn]:
                     pos, neg = display(fn, rev, m, fstate[fn])
                     count += pos + neg
                     if pos and not opts['all']:
                         skip[fn] = True
                 fstate[fn] = m
                 prev[fn] = rev
 
     if not incrementing:
         fstate = fstate.items()
         fstate.sort()
         for fn, state in fstate:
             if fn in skip: continue
             display(fn, rev, {}, state)
     return (count == 0 and 1) or 0
 
 def heads(ui, repo, **opts):
     """show current repository heads"""
     heads = repo.changelog.heads()
     br = None
     if opts['branches']:
         br = repo.branchlookup(heads)
     for n in repo.changelog.heads():
         show_changeset(ui, repo, changenode=n, brinfo=br)
 
 def identify(ui, repo):
     """print information about the working copy"""
     parents = [p for p in repo.dirstate.parents() if p != nullid]
     if not parents:
         ui.write("unknown\n")
         return
 
     hexfunc = ui.verbose and hex or short
     (c, a, d, u) = repo.changes()
     output = ["%s%s" % ('+'.join([hexfunc(parent) for parent in parents]),
                         (c or a or d) and "+" or "")]
 
     if not ui.quiet:
         # multiple tags for a single parent separated by '/'
         parenttags = ['/'.join(tags)
                       for tags in map(repo.nodetags, parents) if tags]
         # tags for multiple parents separated by ' + '
         if parenttags:
             output.append(' + '.join(parenttags))
 
     ui.write("%s\n" % ' '.join(output))
 
 def import_(ui, repo, patch1, *patches, **opts):
     """import an ordered set of patches"""
     patches = (patch1,) + patches
 
     if not opts['force']:
         (c, a, d, u) = repo.changes()
         if c or a or d:
             ui.warn("abort: outstanding uncommitted changes!\n")
             return 1
 
     d = opts["base"]
     strip = opts["strip"]
 
     mailre = re.compile(r'(?:From |[\w-]+:)')
     diffre = re.compile(r'(?:diff -|--- .*\s+\w+ \w+ +\d+ \d+:\d+:\d+ \d+)')
 
     for patch in patches:
         ui.status("applying %s\n" % patch)
         pf = os.path.join(d, patch)
 
         message = []
         user = None
         hgpatch = False
         for line in file(pf):
             line = line.rstrip()
             if not message and mailre.match(line) and not opts['force']:
                 if len(line) > 35: line = line[:32] + '...'
                 raise util.Abort('first line looks like a '
                                  'mail header: ' + line)
             if diffre.match(line):
                 break
             elif hgpatch:
                 # parse values when importing the result of an hg export
                 if line.startswith("# User "):
                     user = line[7:]
                     ui.debug('User: %s\n' % user)
                 elif not line.startswith("# ") and line:
                     message.append(line)
                     hgpatch = False
             elif line == '# HG changeset patch':
                 hgpatch = True
                 message = []       # We may have collected garbage
             else:
                 message.append(line)
 
         # make sure message isn't empty
         if not message:
             message = "imported patch %s\n" % patch
         else:
             message = "%s\n" % '\n'.join(message)
         ui.debug('message:\n%s\n' % message)
 
         f = os.popen("patch -p%d < '%s'" % (strip, pf))
         files = []
         for l in f.read().splitlines():
             l.rstrip('\r\n');
             ui.status("%s\n" % l)
             if l.startswith('patching file '):
                 pf = l[14:]
                 if pf not in files:
                     files.append(pf)
         patcherr = f.close()
         if patcherr:
             raise util.Abort("patch failed")
 
         if len(files) > 0:
             addremove(ui, repo, *files)
         repo.commit(files, message, user)
 
 def incoming(ui, repo, source="default", **opts):
     """show new changesets found in source"""
     source = ui.expandpath(source)
     other = hg.repository(ui, source)
     if not other.local():
         ui.warn("abort: incoming doesn't work for remote"
                 + " repositories yet, sorry!\n")
         return 1
     o = repo.findincoming(other)
     if not o:
         return
     o = other.newer(o)
     o.reverse()
     for n in o:
         show_changeset(ui, other, changenode=n)
         if opts['patch']:
             prev = other.changelog.parents(n)[0]
             dodiff(ui, ui, other, prev, n)
             ui.write("\n")
 
 def init(ui, dest="."):
     """create a new repository in the given directory"""
     if not os.path.exists(dest):
         os.mkdir(dest)
     hg.repository(ui, dest, create=1)
 
 def locate(ui, repo, *pats, **opts):
     """locate files matching specific patterns"""
     end = opts['print0'] and '\0' or '\n'
 
     for src, abs, rel, exact in walk(repo, pats, opts, '(?:.*/|)'):
         if repo.dirstate.state(abs) == '?':
             continue
         if opts['fullpath']:
             ui.write(os.path.join(repo.root, abs), end)
         else:
             ui.write(rel, end)
 
 def log(ui, repo, *pats, **opts):
     """show revision history of entire repository or files"""
     class dui:
         # Implement and delegate some ui protocol.  Save hunks of
         # output for later display in the desired order.
         def __init__(self, ui):
             self.ui = ui
             self.hunk = {}
         def bump(self, rev):
             self.rev = rev
             self.hunk[rev] = []
         def note(self, *args):
             if self.verbose:
                 self.write(*args)
         def status(self, *args):
             if not self.quiet:
                 self.write(*args)
         def write(self, *args):
             self.hunk[self.rev].append(args)
         def __getattr__(self, key):
             return getattr(self.ui, key)
     cwd = repo.getcwd()
     if not pats and cwd:
         opts['include'] = [os.path.join(cwd, i) for i in opts['include']]
         opts['exclude'] = [os.path.join(cwd, x) for x in opts['exclude']]
     changeiter, getchange = walkchangerevs(ui, repo, (pats and cwd) or '',
                                            pats, opts)
     for st, rev, fns in changeiter:
         if st == 'window':
             du = dui(ui)
         elif st == 'add':
             du.bump(rev)
             show_changeset(du, repo, rev)
             if opts['patch']:
                 changenode = repo.changelog.node(rev)
                 prev, other = repo.changelog.parents(changenode)
                 dodiff(du, du, repo, prev, changenode, fns)
                 du.write("\n\n")
         elif st == 'iter':
             for args in du.hunk[rev]:
                 ui.write(*args)
 
 def manifest(ui, repo, rev=None):
     """output the latest or given revision of the project manifest"""
     if rev:
         try:
             # assume all revision numbers are for changesets
             n = repo.lookup(rev)
             change = repo.changelog.read(n)
             n = change[0]
         except hg.RepoError:
             n = repo.manifest.lookup(rev)
     else:
         n = repo.manifest.tip()
     m = repo.manifest.read(n)
     mf = repo.manifest.readflags(n)
     files = m.keys()
     files.sort()
 
     for f in files:
         ui.write("%40s %3s %s\n" % (hex(m[f]), mf[f] and "755" or "644", f))
 
 def outgoing(ui, repo, dest="default-push", **opts):
     """show changesets not found in destination"""
     dest = ui.expandpath(dest)
     other = hg.repository(ui, dest)
     o = repo.findoutgoing(other)
     o = repo.newer(o)
     o.reverse()
     for n in o:
         show_changeset(ui, repo, changenode=n)
         if opts['patch']:
             prev = repo.changelog.parents(n)[0]
             dodiff(ui, ui, repo, prev, n)
             ui.write("\n")
 
 def parents(ui, repo, rev=None):
     """show the parents of the working dir or revision"""
     if rev:
         p = repo.changelog.parents(repo.lookup(rev))
     else:
         p = repo.dirstate.parents()
 
     for n in p:
         if n != nullid:
             show_changeset(ui, repo, changenode=n)
 
 def paths(ui, search=None):
     """show definition of symbolic path names"""
     try:
         repo = hg.repository(ui=ui)
     except hg.RepoError:
         pass
 
     if search:
         for name, path in ui.configitems("paths"):
             if name == search:
                 ui.write("%s\n" % path)
                 return
         ui.warn("not found!\n")
         return 1
     else:
         for name, path in ui.configitems("paths"):
             ui.write("%s = %s\n" % (name, path))
 
 def pull(ui, repo, source="default", **opts):
     """pull changes from the specified source"""
     source = ui.expandpath(source)
     ui.status('pulling from %s\n' % (source))
 
     if opts['ssh']:
         ui.setconfig("ui", "ssh", opts['ssh'])
     if opts['remotecmd']:
         ui.setconfig("ui", "remotecmd", opts['remotecmd'])
 
     other = hg.repository(ui, source)
     r = repo.pull(other)
     if not r:
         if opts['update']:
             return update(ui, repo)
         else:
             ui.status("(run 'hg update' to get a working copy)\n")
 
     return r
 
 def push(ui, repo, dest="default-push", force=False, ssh=None, remotecmd=None):
     """push changes to the specified destination"""
     dest = ui.expandpath(dest)
     ui.status('pushing to %s\n' % (dest))
 
     if ssh:
         ui.setconfig("ui", "ssh", ssh)
     if remotecmd:
         ui.setconfig("ui", "remotecmd", remotecmd)
 
     other = hg.repository(ui, dest)
     r = repo.push(other, force)
     return r
 
 def rawcommit(ui, repo, *flist, **rc):
     "raw commit interface"
     if rc['text']:
         ui.warn("Warning: -t and --text is deprecated,"
                 " please use -m or --message instead.\n")
     message = rc['message'] or rc['text']
     if not message and rc['logfile']:
         try:
             message = open(rc['logfile']).read()
         except IOError:
             pass
     if not message and not rc['logfile']:
         ui.warn("abort: missing commit message\n")
         return 1
 
     files = relpath(repo, list(flist))
     if rc['files']:
         files += open(rc['files']).read().splitlines()
 
     rc['parent'] = map(repo.lookup, rc['parent'])
 
     try:
         repo.rawcommit(files, message, rc['user'], rc['date'], *rc['parent'])
     except ValueError, inst:
         raise util.Abort(str(inst))
 
 def recover(ui, repo):
     """roll back an interrupted transaction"""
     repo.recover()
 
 def remove(ui, repo, pat, *pats, **opts):
     """remove the specified files on the next commit"""
     names = []
     def okaytoremove(abs, rel, exact):
         c, a, d, u = repo.changes(files = [abs])
         reason = None
         if c: reason = 'is modified'
         elif a: reason = 'has been marked for add'
         elif u: reason = 'not managed'
         if reason and exact:
             ui.warn('not removing %s: file %s\n' % (rel, reason))
         else:
             return True
     for src, abs, rel, exact in walk(repo, (pat,) + pats, opts):
         if okaytoremove(abs, rel, exact):
             if not exact: ui.status('removing %s\n' % rel)
             names.append(abs)
     repo.remove(names)
 
 def revert(ui, repo, *names, **opts):
     """revert modified files or dirs back to their unmodified states"""
     node = opts['rev'] and repo.lookup(opts['rev']) or \
            repo.dirstate.parents()[0]
     root = os.path.realpath(repo.root)
 
     def trimpath(p):
         p = os.path.realpath(p)
         if p.startswith(root):
             rest = p[len(root):]
             if not rest:
                 return rest
             if p.startswith(os.sep):
                 return rest[1:]
             return p
 
     relnames = map(trimpath, names or [os.getcwd()])
     chosen = {}
 
     def choose(name):
         def body(name):
             for r in relnames:
                 if not name.startswith(r):
                     continue
                 rest = name[len(r):]
                 if not rest:
                     return r, True
                 depth = rest.count(os.sep)
                 if not r:
                     if depth == 0 or not opts['nonrecursive']:
                         return r, True
                 elif rest[0] == os.sep:
                     if depth == 1 or not opts['nonrecursive']:
                         return r, True
             return None, False
         relname, ret = body(name)
         if ret:
             chosen[relname] = 1
         return ret
 
     r = repo.update(node, False, True, choose, False)
     for n in relnames:
         if n not in chosen:
             ui.warn('error: no matches for %s\n' % n)
             r = 1
     sys.stdout.flush()
     return r
 
 def root(ui, repo):
     """print the root (top) of the current working dir"""
     ui.write(repo.root + "\n")
 
 def serve(ui, repo, **opts):
     """export the repository via HTTP"""
 
     if opts["stdio"]:
         fin, fout = sys.stdin, sys.stdout
         sys.stdout = sys.stderr
 
         def getarg():
             argline = fin.readline()[:-1]
             arg, l = argline.split()
             val = fin.read(int(l))
             return arg, val
         def respond(v):
             fout.write("%d\n" % len(v))
             fout.write(v)
             fout.flush()
 
         lock = None
 
         while 1:
             cmd = fin.readline()[:-1]
             if cmd == '':
                 return
             if cmd == "heads":
                 h = repo.heads()
                 respond(" ".join(map(hex, h)) + "\n")
             if cmd == "lock":
                 lock = repo.lock()
                 respond("")
             if cmd == "unlock":
                 if lock:
                     lock.release()
                 lock = None
                 respond("")
             elif cmd == "branches":
                 arg, nodes = getarg()
                 nodes = map(bin, nodes.split(" "))
                 r = []
                 for b in repo.branches(nodes):
                     r.append(" ".join(map(hex, b)) + "\n")
                 respond("".join(r))
             elif cmd == "between":
                 arg, pairs = getarg()
                 pairs = [map(bin, p.split("-")) for p in pairs.split(" ")]
                 r = []
                 for b in repo.between(pairs):
                     r.append(" ".join(map(hex, b)) + "\n")
                 respond("".join(r))
             elif cmd == "changegroup":
                 nodes = []
                 arg, roots = getarg()
                 nodes = map(bin, roots.split(" "))
 
                 cg = repo.changegroup(nodes)
                 while 1:
                     d = cg.read(4096)
                     if not d:
                         break
                     fout.write(d)
 
                 fout.flush()
 
             elif cmd == "addchangegroup":
                 if not lock:
                     respond("not locked")
                     continue
                 respond("")
 
                 r = repo.addchangegroup(fin)
                 respond("")
 
     optlist = "name templates style address port ipv6 accesslog errorlog"
     for o in optlist.split():
         if opts[o]:
             ui.setconfig("web", o, opts[o])
 
     try:
         httpd = hgweb.create_server(repo)
     except socket.error, inst:
         raise util.Abort('cannot start server: ' + inst.args[1])
 
     if ui.verbose:
         addr, port = httpd.socket.getsockname()
         if addr == '0.0.0.0':
             addr = socket.gethostname()
         else:
             try:
                 addr = socket.gethostbyaddr(addr)[0]
             except socket.error:
                 pass
         if port != 80:
             ui.status('listening at http://%s:%d/\n' % (addr, port))
         else:
             ui.status('listening at http://%s/\n' % addr)
     httpd.serve_forever()
 
 def status(ui, repo, *pats, **opts):
     '''show changed files in the working directory
 
     M = modified
     A = added
     R = removed
     ? = not tracked
     '''
 
     cwd = repo.getcwd()
     files, matchfn, anypats = matchpats(repo, cwd, pats, opts)
     (c, a, d, u) = [[util.pathto(cwd, x) for x in n]
                     for n in repo.changes(files=files, match=matchfn)]
 
     changetypes = [('modified', 'M', c),
                    ('added', 'A', a),
                    ('removed', 'R', d),
                    ('unknown', '?', u)]
 
     end = opts['print0'] and '\0' or '\n'
 
     for opt, char, changes in ([ct for ct in changetypes if opts[ct[0]]]
                                or changetypes):
         if opts['no_status']:
             format = "%%s%s" % end
         else:
             format = "%s %%s%s" % (char, end);
 
         for f in changes:
             ui.write(format % f)
 
 def tag(ui, repo, name, rev=None, **opts):
     """add a tag for the current tip or a given revision"""
     if opts['text']:
         ui.warn("Warning: -t and --text is deprecated,"
                 " please use -m or --message instead.\n")
     if name == "tip":
         ui.warn("abort: 'tip' is a reserved name!\n")
         return -1
     if rev:
         r = hex(repo.lookup(rev))
     else:
         r = hex(repo.changelog.tip())
 
     if name.find(revrangesep) >= 0:
         ui.warn("abort: '%s' cannot be used in a tag name\n" % revrangesep)
         return -1
 
     if opts['local']:
         repo.opener("localtags", "a").write("%s %s\n" % (r, name))
         return
 
     (c, a, d, u) = repo.changes()
     for x in (c, a, d, u):
         if ".hgtags" in x:
             ui.warn("abort: working copy of .hgtags is changed!\n")
             ui.status("(please commit .hgtags manually)\n")
             return -1
 
     repo.wfile(".hgtags", "ab").write("%s %s\n" % (r, name))
     if repo.dirstate.state(".hgtags") == '?':
         repo.add([".hgtags"])
 
     message = (opts['message'] or opts['text'] or
                "Added tag %s for changeset %s" % (name, r))
     try:
         repo.commit([".hgtags"], message, opts['user'], opts['date'])
     except ValueError, inst:
         raise util.Abort(str(inst))
 
 def tags(ui, repo):
     """list repository tags"""
 
     l = repo.tagslist()
     l.reverse()
     for t, n in l:
         try:
             r = "%5d:%s" % (repo.changelog.rev(n), hex(n))
         except KeyError:
             r = "    ?:?"
         ui.write("%-30s %s\n" % (t, r))
 
 def tip(ui, repo):
     """show the tip revision"""
     n = repo.changelog.tip()
     show_changeset(ui, repo, changenode=n)
 
+def unbundle(ui, repo, fname):
+    f = urllib.urlopen(fname)
+
+    if f.read(4) != "HG10":
+        ui.warn("abort: not a Mercurial bundle file!\n")
+        return -1
+
+    class bzread:
+        def __init__(self, f):
+            self.zd = bz2.BZ2Decompressor()
+            self.f = f
+            self.buf = ""
+        def read(self, l):
+            while l > len(self.buf):
+                r = self.f.read(4096)
+                if r:
+                    self.buf += self.zd.decompress(r)
+                else:
+                    break
+            d, self.buf = self.buf[:l], self.buf[l:]
+            return d
+
+    repo.addchangegroup(bzread(f))
+
 def undo(ui, repo):
     """undo the last commit or pull
 
     Roll back the last pull or commit transaction on the
     repository, restoring the project to its earlier state.
 
     This command should be used with care. There is only one level of
     undo and there is no redo.
 
     This command is not intended for use on public repositories. Once
     a change is visible for pull by other users, undoing it locally is
     ineffective.
     """
     repo.undo()
 
 def update(ui, repo, node=None, merge=False, clean=False, branch=None):
     '''update or merge working directory
 
     If there are no outstanding changes in the working directory and
     there is a linear relationship between the current version and the
     requested version, the result is the requested version.
 
     Otherwise the result is a merge between the contents of the
     current working directory and the requested version. Files that
     changed between either parent are marked as changed for the next
     commit and a commit must be performed before any further updates
     are allowed.
     '''
     if branch:
         br = repo.branchlookup(branch=branch)
         found = []
         for x in br:
             if branch in br[x]:
                 found.append(x)
         if len(found) > 1:
             ui.warn("Found multiple heads for %s\n" % branch)
             for x in found:
                 show_changeset(ui, repo, changenode=x, brinfo=br)
             return 1
         if len(found) == 1:
             node = found[0]
             ui.warn("Using head %s for branch %s\n" % (short(node), branch))
         else:
             ui.warn("branch %s not found\n" % (branch))
             return 1
     else:
         node = node and repo.lookup(node) or repo.changelog.tip()
     return repo.update(node, allow=merge, force=clean)
 
 def verify(ui, repo):
     """verify the integrity of the repository"""
     return repo.verify()
 
 # Command options and aliases are listed here, alphabetically
 
 table = {
     "^add":
         (add,
          [('I', 'include', [], 'include path in search'),
           ('X', 'exclude', [], 'exclude path from search')],
          "hg add [OPTION]... [FILE]..."),
     "addremove":
         (addremove,
          [('I', 'include', [], 'include path in search'),
           ('X', 'exclude', [], 'exclude path from search')],
          "hg addremove [OPTION]... [FILE]..."),
     "^annotate":
         (annotate,
          [('r', 'rev', '', 'revision'),
           ('a', 'text', None, 'treat all files as text'),
           ('u', 'user', None, 'show user'),
           ('n', 'number', None, 'show revision number'),
           ('c', 'changeset', None, 'show changeset'),
           ('I', 'include', [], 'include path in search'),
           ('X', 'exclude', [], 'exclude path from search')],
          'hg annotate [OPTION]... FILE...'),
+    "bundle":
+        (bundle,
+         [],
+         'hg bundle FILE DEST'),
     "cat":
         (cat,
          [('o', 'output', "", 'output to file')],
          'hg cat [-o OUTFILE] FILE [REV]'),
     "^clone":
         (clone,
          [('U', 'noupdate', None, 'skip update after cloning'),
           ('e', 'ssh', "", 'ssh command'),
           ('', 'remotecmd', "", 'remote hg command')],
          'hg clone [OPTION]... SOURCE [DEST]'),
     "^commit|ci":
         (commit,
          [('A', 'addremove', None, 'run add/remove during commit'),
           ('I', 'include', [], 'include path in search'),
           ('X', 'exclude', [], 'exclude path from search'),
           ('m', 'message', "", 'commit message'),
           ('t', 'text', "", 'commit message (deprecated: use -m)'),
           ('l', 'logfile', "", 'commit message file'),
           ('d', 'date', "", 'date code'),
           ('u', 'user', "", 'user')],
          'hg commit [OPTION]... [FILE]...'),
     "copy": (copy, [], 'hg copy SOURCE DEST'),
     "debugcheckstate": (debugcheckstate, [], 'debugcheckstate'),
     "debugconfig": (debugconfig, [], 'debugconfig'),
     "debugstate": (debugstate, [], 'debugstate'),
     "debugdata": (debugdata, [], 'debugdata FILE REV'),
     "debugindex": (debugindex, [], 'debugindex FILE'),
     "debugindexdot": (debugindexdot, [], 'debugindexdot FILE'),
     "debugrename": (debugrename, [], 'debugrename FILE [REV]'),
     "debugwalk":
         (debugwalk,
          [('I', 'include', [], 'include path in search'),
           ('X', 'exclude', [], 'exclude path from search')],
          'debugwalk [OPTION]... [FILE]...'),
     "^diff":
         (diff,
          [('r', 'rev', [], 'revision'),
           ('a', 'text', None, 'treat all files as text'),
           ('I', 'include', [], 'include path in search'),
           ('X', 'exclude', [], 'exclude path from search')],
          'hg diff [-a] [-I] [-X] [-r REV1 [-r REV2]] [FILE]...'),
     "^export":
         (export,
          [('o', 'output', "", 'output to file'),
           ('a', 'text', None, 'treat all files as text')],
          "hg export [-a] [-o OUTFILE] REV..."),
     "forget":
         (forget,
          [('I', 'include', [], 'include path in search'),
           ('X', 'exclude', [], 'exclude path from search')],
          "hg forget [OPTION]... FILE..."),
     "grep":
         (grep,
          [('0', 'print0', None, 'end fields with NUL'),
           ('I', 'include', [], 'include path in search'),
           ('X', 'exclude', [], 'include path in search'),
           ('', 'all', None, 'print all revisions with matches'),
           ('i', 'ignore-case', None, 'ignore case when matching'),
           ('l', 'files-with-matches', None, 'print names of files and revs with matches'),
           ('n', 'line-number', None, 'print line numbers'),
           ('r', 'rev', [], 'search in revision rev'),
           ('u', 'user', None, 'print user who made change')],
          "hg grep [OPTION]... PATTERN [FILE]..."),
     "heads":
         (heads,
          [('b', 'branches', None, 'find branch info')],
          'hg heads [-b]'),
     "help": (help_, [], 'hg help [COMMAND]'),
     "identify|id": (identify, [], 'hg identify'),
     "import|patch":
         (import_,
          [('p', 'strip', 1, 'path strip'),
           ('f', 'force', None, 'skip check for outstanding changes'),
           ('b', 'base', "", 'base path')],
          "hg import [-f] [-p NUM] [-b BASE] PATCH..."),
     "incoming|in": (incoming, 
          [('p', 'patch', None, 'show patch')],
          'hg incoming [-p] [SOURCE]'),
     "^init": (init, [], 'hg init [DEST]'),
     "locate":
         (locate,
          [('r', 'rev', '', 'revision'),
           ('0', 'print0', None, 'end filenames with NUL'),
           ('f', 'fullpath', None, 'print complete paths'),
           ('I', 'include', [], 'include path in search'),
           ('X', 'exclude', [], 'exclude path from search')],
          'hg locate [OPTION]... [PATTERN]...'),
     "^log|history":
         (log,
          [('I', 'include', [], 'include path in search'),
           ('X', 'exclude', [], 'exclude path from search'),
           ('r', 'rev', [], 'revision'),
           ('p', 'patch', None, 'show patch')],
          'hg log [-I] [-X] [-r REV]... [-p] [FILE]'),
     "manifest": (manifest, [], 'hg manifest [REV]'),
     "outgoing|out": (outgoing, 
          [('p', 'patch', None, 'show patch')],
          'hg outgoing [-p] [DEST]'),
     "parents": (parents, [], 'hg parents [REV]'),
     "paths": (paths, [], 'hg paths [NAME]'),
     "^pull":
         (pull,
          [('u', 'update', None, 'update working directory'),
           ('e', 'ssh', "", 'ssh command'),
           ('', 'remotecmd', "", 'remote hg command')],
          'hg pull [-u] [-e FILE] [--remotecmd FILE] [SOURCE]'),
     "^push":
         (push,
          [('f', 'force', None, 'force push'),
           ('e', 'ssh', "", 'ssh command'),
           ('', 'remotecmd', "", 'remote hg command')],
          'hg push [-f] [-e FILE] [--remotecmd FILE] [DEST]'),
     "rawcommit":
         (rawcommit,
          [('p', 'parent', [], 'parent'),
           ('d', 'date', "", 'date code'),
           ('u', 'user', "", 'user'),
           ('F', 'files', "", 'file list'),
           ('m', 'message', "", 'commit message'),
           ('t', 'text', "", 'commit message (deprecated: use -m)'),
           ('l', 'logfile', "", 'commit message file')],
          'hg rawcommit [OPTION]... [FILE]...'),
     "recover": (recover, [], "hg recover"),
     "^remove|rm": (remove,
                    [('I', 'include', [], 'include path in search'),
                     ('X', 'exclude', [], 'exclude path from search')],
                    "hg remove [OPTION]... FILE..."),
     "^revert":
         (revert,
          [("n", "nonrecursive", None, "don't recurse into subdirs"),
           ("r", "rev", "", "revision")],
          "hg revert [-n] [-r REV] [NAME]..."),
     "root": (root, [], "hg root"),
     "^serve":
         (serve,
          [('A', 'accesslog', '', 'access log file'),
           ('E', 'errorlog', '', 'error log file'),
           ('p', 'port', 0, 'listen port'),
           ('a', 'address', '', 'interface address'),
           ('n', 'name', "", 'repository name'),
           ('', 'stdio', None, 'for remote clients'),
           ('t', 'templates', "", 'template directory'),
           ('', 'style', "", 'template style'),
           ('6', 'ipv6', None, 'use IPv6 in addition to IPv4')],
          "hg serve [OPTION]..."),
     "^status":
         (status,
          [('m', 'modified', None, 'show only modified files'),
           ('a', 'added', None, 'show only added files'),
           ('r', 'removed', None, 'show only removed files'),
           ('u', 'unknown', None, 'show only unknown (not tracked) files'),
           ('n', 'no-status', None, 'hide status prefix'),
           ('0', 'print0', None, 'end filenames with NUL'),
           ('I', 'include', [], 'include path in search'),
           ('X', 'exclude', [], 'exclude path from search')],
          "hg status [OPTION]... [FILE]..."),
     "tag":
         (tag,
          [('l', 'local', None, 'make the tag local'),
           ('m', 'message', "", 'commit message'),
           ('t', 'text', "", 'commit message (deprecated: use -m)'),
           ('d', 'date', "", 'date code'),
           ('u', 'user', "", 'user')],
          'hg tag [OPTION]... NAME [REV]'),
     "tags": (tags, [], 'hg tags'),
     "tip": (tip, [], 'hg tip'),
+    "unbundle":
+        (unbundle,
+         [],
+         'hg unbundle FILE'),
     "undo": (undo, [], 'hg undo'),
     "^update|up|checkout|co":
         (update,
          [('b', 'branch', "", 'checkout the head of a specific branch'),
           ('m', 'merge', None, 'allow merging of conflicts'),
           ('C', 'clean', None, 'overwrite locally modified files')],
          'hg update [-b TAG] [-m] [-C] [REV]'),
     "verify": (verify, [], 'hg verify'),
     "version": (show_version, [], 'hg version'),
 }
 
 globalopts = [
     ('R', 'repository', "", 'repository root directory'),
     ('', 'cwd', '', 'change working directory'),
     ('y', 'noninteractive', None, 'run non-interactively'),
     ('q', 'quiet', None, 'quiet mode'),
     ('v', 'verbose', None, 'verbose mode'),
     ('', 'debug', None, 'debug mode'),
     ('', 'traceback', None, 'print traceback on exception'),
     ('', 'time', None, 'time how long the command takes'),
     ('', 'profile', None, 'profile'),
     ('', 'version', None, 'output version information and exit'),
     ('h', 'help', None, 'display help and exit'),
 ]
 
 norepo = ("clone init version help debugconfig debugdata"
           " debugindex debugindexdot paths")
 
 def find(cmd):
     for e in table.keys():
         if re.match("(%s)$" % e, cmd):
             return e, table[e]
 
     raise UnknownCommand(cmd)
 
 class SignalInterrupt(Exception):
     """Exception raised on SIGTERM and SIGHUP."""
 
 def catchterm(*args):
     raise SignalInterrupt
 
 def run():
     sys.exit(dispatch(sys.argv[1:]))
 
 class ParseError(Exception):
     """Exception raised on errors in parsing the command line."""
 
 def parse(args):
     options = {}
     cmdoptions = {}
 
     try:
         args = fancyopts.fancyopts(args, globalopts, options)
     except fancyopts.getopt.GetoptError, inst:
         raise ParseError(None, inst)
 
     if args:
         cmd, args = args[0], args[1:]
         i = find(cmd)[1]
         c = list(i[1])
     else:
         cmd = None
         c = []
 
     # combine global options into local
     for o in globalopts:
         c.append((o[0], o[1], options[o[1]], o[3]))
 
     try:
         args = fancyopts.fancyopts(args, c, cmdoptions)
     except fancyopts.getopt.GetoptError, inst:
         raise ParseError(cmd, inst)
 
     # separate global options back out
     for o in globalopts:
         n = o[1]
         options[n] = cmdoptions[n]
         del cmdoptions[n]
 
     return (cmd, cmd and i[0] or None, args, options, cmdoptions)
 
 def dispatch(args):
     signal.signal(signal.SIGTERM, catchterm)
     try:
         signal.signal(signal.SIGHUP, catchterm)
     except AttributeError:
         pass
 
     u = ui.ui()
     external = []
     for x in u.extensions():
         if x[1]:
             mod = imp.load_source(x[0], x[1])
         else:
             def importh(name):
                 mod = __import__(name)
                 components = name.split('.')
                 for comp in components[1:]:
                     mod = getattr(mod, comp)
                 return mod
             mod = importh(x[0])
         external.append(mod)
     for x in external:
         for t in x.cmdtable:
             if t in table:
                 u.warn("module %s override %s\n" % (x.__name__, t))
         table.update(x.cmdtable)
 
     try:
         cmd, func, args, options, cmdoptions = parse(args)
     except ParseError, inst:
         if inst.args[0]:
             u.warn("hg %s: %s\n" % (inst.args[0], inst.args[1]))
             help_(u, inst.args[0])
         else:
             u.warn("hg: %s\n" % inst.args[1])
             help_(u, 'shortlist')
         sys.exit(-1)
     except UnknownCommand, inst:
         u.warn("hg: unknown command '%s'\n" % inst.args[0])
         help_(u, 'shortlist')
         sys.exit(1)
 
     if options["time"]:
         def get_times():
             t = os.times()
             if t[4] == 0.0: # Windows leaves this as zero, so use time.clock()
                 t = (t[0], t[1], t[2], t[3], time.clock())
             return t
         s = get_times()
         def print_time():
             t = get_times()
             u.warn("Time: real %.3f secs (user %.3f+%.3f sys %.3f+%.3f)\n" %
                 (t[4]-s[4], t[0]-s[0], t[2]-s[2], t[1]-s[1], t[3]-s[3]))
         atexit.register(print_time)
 
     u.updateopts(options["verbose"], options["debug"], options["quiet"],
               not options["noninteractive"])
 
     try:
         try:
             if options['help']:
                 help_(u, cmd, options['version'])
                 sys.exit(0)
             elif options['version']:
                 show_version(u)
                 sys.exit(0)
             elif not cmd:
                 help_(u, 'shortlist')
                 sys.exit(0)
 
             if options['cwd']:
                 try:
                     os.chdir(options['cwd'])
                 except OSError, inst:
                     u.warn('abort: %s: %s\n' % (options['cwd'], inst.strerror))
                     sys.exit(1)
 
             if cmd not in norepo.split():
                 path = options["repository"] or ""
                 repo = hg.repository(ui=u, path=path)
                 for x in external:
                     x.reposetup(u, repo)
                 d = lambda: func(u, repo, *args, **cmdoptions)
             else:
                 d = lambda: func(u, *args, **cmdoptions)
 
             if options['profile']:
                 import hotshot, hotshot.stats
                 prof = hotshot.Profile("hg.prof")
                 r = prof.runcall(d)
                 prof.close()
                 stats = hotshot.stats.load("hg.prof")
                 stats.strip_dirs()
                 stats.sort_stats('time', 'calls')
                 stats.print_stats(40)
                 return r
             else:
                 return d()
         except:
             if options['traceback']:
                 traceback.print_exc()
             raise
     except hg.RepoError, inst:
         u.warn("abort: ", inst, "!\n")
     except revlog.RevlogError, inst:
         u.warn("abort: ", inst, "!\n")
     except SignalInterrupt:
         u.warn("killed!\n")
     except KeyboardInterrupt:
         try:
             u.warn("interrupted!\n")
         except IOError, inst:
             if inst.errno == errno.EPIPE:
                 if u.debugflag:
                     u.warn("\nbroken pipe\n")
             else:
                 raise
     except IOError, inst:
         if hasattr(inst, "code"):
             u.warn("abort: %s\n" % inst)
         elif hasattr(inst, "reason"):
             u.warn("abort: error: %s\n" % inst.reason[1])
         elif hasattr(inst, "args") and inst[0] == errno.EPIPE:
             if u.debugflag:
                 u.warn("broken pipe\n")
         else:
             raise
     except OSError, inst:
         if hasattr(inst, "filename"):
             u.warn("abort: %s: %s\n" % (inst.strerror, inst.filename))
         else:
             u.warn("abort: %s\n" % inst.strerror)
     except util.Abort, inst:
         u.warn('abort: ', inst.args[0] % inst.args[1:], '\n')
         sys.exit(1)
     except TypeError, inst:
         # was this an argument error?
         tb = traceback.extract_tb(sys.exc_info()[2])
         if len(tb) > 2: # no
             raise
         u.debug(inst, "\n")
         u.warn("%s: invalid arguments\n" % cmd)
         help_(u, cmd)
     except UnknownCommand, inst:
         u.warn("hg: unknown command '%s'\n" % inst.args[0])
         help_(u, 'shortlist')
     except SystemExit:
         # don't catch this is the catch-all below
         raise
     except:
         u.warn("** unknown exception encountered, details follow\n")
         u.warn("** report bug details to [e-mail]\n")
         raise
 
     sys.exit(-1)

mercurial/revlog.py

@@ -1,651 +1,651 b''
 """
 revlog.py - storage back-end for mercurial
 
 This provides efficient delta storage with O(1) retrieve and append
 and O(changes) merge between branches
 
 Copyright 2005 Matt Mackall <[e-mail]>
 
 This software may be used and distributed according to the terms
 of the GNU General Public License, incorporated herein by reference.
 """
 
 import zlib, struct, sha, binascii, heapq
 import mdiff
 from node import *
 
 def hash(text, p1, p2):
     """generate a hash from the given text and its parent hashes
 
     This hash combines both the current file contents and its history
     in a manner that makes it easy to distinguish nodes with the same
     content in the revision graph.
     """
     l = [p1, p2]
     l.sort()
     s = sha.new(l[0])
     s.update(l[1])
     s.update(text)
     return s.digest()
 
 def compress(text):
     """ generate a possibly-compressed representation of text """
     if not text: return text
     if len(text) < 44:
         if text[0] == '\0': return text
         return 'u' + text
     bin = zlib.compress(text)
     if len(bin) > len(text):
         if text[0] == '\0': return text
         return 'u' + text
     return bin
 
 def decompress(bin):
     """ decompress the given input """
     if not bin: return bin
     t = bin[0]
     if t == '\0': return bin
     if t == 'x': return zlib.decompress(bin)
     if t == 'u': return bin[1:]
     raise RevlogError("unknown compression type %s" % t)
 
 indexformat = ">4l20s20s20s"
 
 class lazyparser:
     """
     this class avoids the need to parse the entirety of large indices
 
     By default we parse and load 1000 entries at a time.
 
     If no position is specified, we load the whole index, and replace
     the lazy objects in revlog with the underlying objects for
     efficiency in cases where we look at most of the nodes.
     """
     def __init__(self, data, revlog):
         self.data = data
         self.s = struct.calcsize(indexformat)
         self.l = len(data)/self.s
         self.index = [None] * self.l
         self.map = {nullid: -1}
         self.all = 0
         self.revlog = revlog
 
     def load(self, pos=None):
         if self.all: return
         if pos is not None:
             block = pos / 1000
             i = block * 1000
             end = min(self.l, i + 1000)
         else:
             self.all = 1
             i = 0
             end = self.l
             self.revlog.index = self.index
             self.revlog.nodemap = self.map
 
         while i < end:
             d = self.data[i * self.s: (i + 1) * self.s]
             e = struct.unpack(indexformat, d)
             self.index[i] = e
             self.map[e[6]] = i
             i += 1
 
 class lazyindex:
     """a lazy version of the index array"""
     def __init__(self, parser):
         self.p = parser
     def __len__(self):
         return len(self.p.index)
     def load(self, pos):
         self.p.load(pos)
         return self.p.index[pos]
     def __getitem__(self, pos):
         return self.p.index[pos] or self.load(pos)
     def append(self, e):
         self.p.index.append(e)
 
 class lazymap:
     """a lazy version of the node map"""
     def __init__(self, parser):
         self.p = parser
     def load(self, key):
         if self.p.all: return
         n = self.p.data.find(key)
         if n < 0:
             raise KeyError(key)
         pos = n / self.p.s
         self.p.load(pos)
     def __contains__(self, key):
         self.p.load()
         return key in self.p.map
     def __iter__(self):
         yield nullid
         for i in xrange(self.p.l):
             try:
                 yield self.p.index[i][6]
             except:
                 self.p.load(i)
                 yield self.p.index[i][6]
     def __getitem__(self, key):
         try:
             return self.p.map[key]
         except KeyError:
             try:
                 self.load(key)
                 return self.p.map[key]
             except KeyError:
                 raise KeyError("node " + hex(key))
     def __setitem__(self, key, val):
         self.p.map[key] = val
 
 class RevlogError(Exception): pass
 
 class revlog:
     """
     the underlying revision storage object
 
     A revlog consists of two parts, an index and the revision data.
 
     The index is a file with a fixed record size containing
     information on each revision, includings its nodeid (hash), the
     nodeids of its parents, the position and offset of its data within
     the data file, and the revision it's based on. Finally, each entry
     contains a linkrev entry that can serve as a pointer to external
     data.
 
     The revision data itself is a linear collection of data chunks.
     Each chunk represents a revision and is usually represented as a
     delta against the previous chunk. To bound lookup time, runs of
     deltas are limited to about 2 times the length of the original
     version data. This makes retrieval of a version proportional to
     its size, or O(1) relative to the number of revisions.
 
     Both pieces of the revlog are written to in an append-only
     fashion, which means we never need to rewrite a file to insert or
     remove data, and can use some simple techniques to avoid the need
     for locking while reading.
     """
     def __init__(self, opener, indexfile, datafile):
         """
         create a revlog object
 
         opener is a function that abstracts the file opening operation
         and can be used to implement COW semantics or the like.
         """
         self.indexfile = indexfile
         self.datafile = datafile
         self.opener = opener
         self.cache = None
 
         try:
             i = self.opener(self.indexfile).read()
         except IOError:
             i = ""
 
         if len(i) > 10000:
             # big index, let's parse it on demand
             parser = lazyparser(i, self)
             self.index = lazyindex(parser)
             self.nodemap = lazymap(parser)
         else:
             s = struct.calcsize(indexformat)
             l = len(i) / s
             self.index = [None] * l
             m = [None] * l
 
             n = 0
             for f in xrange(0, len(i), s):
                 # offset, size, base, linkrev, p1, p2, nodeid
                 e = struct.unpack(indexformat, i[f:f + s])
                 m[n] = (e[6], n)
                 self.index[n] = e
                 n += 1
 
             self.nodemap = dict(m)
             self.nodemap[nullid] = -1
 
     def tip(self): return self.node(len(self.index) - 1)
     def count(self): return len(self.index)
     def node(self, rev): return (rev < 0) and nullid or self.index[rev][6]
     def rev(self, node):
         try:
             return self.nodemap[node]
         except KeyError:
             raise RevlogError('%s: no node %s' % (self.indexfile, hex(node)))
     def linkrev(self, node): return self.index[self.rev(node)][3]
     def parents(self, node):
         if node == nullid: return (nullid, nullid)
         return self.index[self.rev(node)][4:6]
 
     def start(self, rev): return self.index[rev][0]
     def length(self, rev): return self.index[rev][1]
     def end(self, rev): return self.start(rev) + self.length(rev)
     def base(self, rev): return self.index[rev][2]
 
     def reachable(self, rev, stop=None):
         reachable = {}
         visit = [rev]
         reachable[rev] = 1
         if stop:
             stopn = self.rev(stop)
         else:
             stopn = 0
         while visit:
             n = visit.pop(0)
             if n == stop:
                 continue
             if n == nullid:
                 continue
             for p in self.parents(n):
                 if self.rev(p) < stopn:
                     continue
                 if p not in reachable:
                     reachable[p] = 1
                     visit.append(p)
         return reachable
 
     def heads(self, stop=None):
         """return the list of all nodes that have no children"""
         p = {}
         h = []
         stoprev = 0
         if stop and stop in self.nodemap:
             stoprev = self.rev(stop)
 
         for r in range(self.count() - 1, -1, -1):
             n = self.node(r)
             if n not in p:
                 h.append(n)
             if n == stop:
                 break
             if r < stoprev:
                 break
             for pn in self.parents(n):
                 p[pn] = 1
         return h
 
     def children(self, node):
         """find the children of a given node"""
         c = []
         p = self.rev(node)
         for r in range(p + 1, self.count()):
             n = self.node(r)
             for pn in self.parents(n):
                 if pn == node:
                     c.append(n)
                     continue
                 elif pn == nullid:
                     continue
         return c
 
     def lookup(self, id):
         """locate a node based on revision number or subset of hex nodeid"""
         try:
             rev = int(id)
             if str(rev) != id: raise ValueError
             if rev < 0: rev = self.count() + rev
             if rev < 0 or rev >= self.count(): raise ValueError
             return self.node(rev)
         except (ValueError, OverflowError):
             c = []
             for n in self.nodemap:
                 if hex(n).startswith(id):
                     c.append(n)
             if len(c) > 1: raise RevlogError("Ambiguous identifier")
             if len(c) < 1: raise RevlogError("No match found")
             return c[0]
 
         return None
 
     def diff(self, a, b):
         """return a delta between two revisions"""
         return mdiff.textdiff(a, b)
 
     def patches(self, t, pl):
         """apply a list of patches to a string"""
         return mdiff.patches(t, pl)
 
     def delta(self, node):
         """return or calculate a delta between a node and its predecessor"""
         r = self.rev(node)
         b = self.base(r)
         if r == b:
             return self.diff(self.revision(self.node(r - 1)),
                              self.revision(node))
         else:
             f = self.opener(self.datafile)
             f.seek(self.start(r))
             data = f.read(self.length(r))
         return decompress(data)
 
     def revision(self, node):
         """return an uncompressed revision of a given"""
         if node == nullid: return ""
         if self.cache and self.cache[0] == node: return self.cache[2]
 
         # look up what we need to read
         text = None
         rev = self.rev(node)
         start, length, base, link, p1, p2, node = self.index[rev]
         end = start + length
         if base != rev: start = self.start(base)
 
         # do we have useful data cached?
         if self.cache and self.cache[1] >= base and self.cache[1] < rev:
             base = self.cache[1]
             start = self.start(base + 1)
             text = self.cache[2]
             last = 0
 
         f = self.opener(self.datafile)
         f.seek(start)
         data = f.read(end - start)
 
         if text is None:
             last = self.length(base)
             text = decompress(data[:last])
 
         bins = []
         for r in xrange(base + 1, rev + 1):
             s = self.length(r)
             bins.append(decompress(data[last:last + s]))
             last = last + s
 
         text = mdiff.patches(text, bins)
 
         if node != hash(text, p1, p2):
             raise RevlogError("integrity check failed on %s:%d"
                           % (self.datafile, rev))
 
         self.cache = (node, rev, text)
         return text
 
     def addrevision(self, text, transaction, link, p1=None, p2=None, d=None):
         """add a revision to the log
 
         text - the revision data to add
         transaction - the transaction object used for rollback
         link - the linkrev data to add
         p1, p2 - the parent nodeids of the revision
         d - an optional precomputed delta
         """
         if text is None: text = ""
         if p1 is None: p1 = self.tip()
         if p2 is None: p2 = nullid
 
         node = hash(text, p1, p2)
 
         if node in self.nodemap:
             return node
 
         n = self.count()
         t = n - 1
 
         if n:
             base = self.base(t)
             start = self.start(base)
             end = self.end(t)
             if not d:
                 prev = self.revision(self.tip())
                 d = self.diff(prev, text)
             data = compress(d)
             dist = end - start + len(data)
 
         # full versions are inserted when the needed deltas
         # become comparable to the uncompressed text
         if not n or dist > len(text) * 2:
             data = compress(text)
             base = n
         else:
             base = self.base(t)
 
         offset = 0
         if t >= 0:
             offset = self.end(t)
 
         e = (offset, len(data), base, link, p1, p2, node)
 
         self.index.append(e)
         self.nodemap[node] = n
         entry = struct.pack(indexformat, *e)
 
         transaction.add(self.datafile, e[0])
         self.opener(self.datafile, "a").write(data)
         transaction.add(self.indexfile, n * len(entry))
         self.opener(self.indexfile, "a").write(entry)
 
         self.cache = (node, n, text)
         return node
 
     def ancestor(self, a, b):
         """calculate the least common ancestor of nodes a and b"""
         # calculate the distance of every node from root
         dist = {nullid: 0}
         for i in xrange(self.count()):
             n = self.node(i)
             p1, p2 = self.parents(n)
             dist[n] = max(dist[p1], dist[p2]) + 1
 
         # traverse ancestors in order of decreasing distance from root
         def ancestors(node):
             # we store negative distances because heap returns smallest member
             h = [(-dist[node], node)]
             seen = {}
             earliest = self.count()
             while h:
                 d, n = heapq.heappop(h)
                 if n not in seen:
                     seen[n] = 1
                     r = self.rev(n)
                     yield (-d, r, n)
                     for p in self.parents(n):
                         heapq.heappush(h, (-dist[p], p))
 
         x = ancestors(a)
         y = ancestors(b)
         lx = x.next()
         ly = y.next()
 
         # increment each ancestor list until it is closer to root than
         # the other, or they match
         while 1:
             if lx == ly:
                 return lx[2]
             elif lx < ly:
                 ly = y.next()
             elif lx > ly:
                 lx = x.next()
 
     def group(self, linkmap):
         """calculate a delta group
 
         Given a list of changeset revs, return a set of deltas and
         metadata corresponding to nodes. the first delta is
         parent(nodes[0]) -> nodes[0] the receiver is guaranteed to
         have this parent as it has all history before these
         changesets. parent is parent[0]
         """
         revs = []
         needed = {}
 
         # find file nodes/revs that match changeset revs
         for i in xrange(0, self.count()):
             if self.index[i][3] in linkmap:
                 revs.append(i)
                 needed[i] = 1
 
         # if we don't have any revisions touched by these changesets, bail
         if not revs:
             yield struct.pack(">l", 0)
             return
 
         # add the parent of the first rev
         p = self.parents(self.node(revs[0]))[0]
         revs.insert(0, self.rev(p))
 
         # for each delta that isn't contiguous in the log, we need to
         # reconstruct the base, reconstruct the result, and then
         # calculate the delta. We also need to do this where we've
         # stored a full version and not a delta
         for i in xrange(0, len(revs) - 1):
             a, b = revs[i], revs[i + 1]
             if a + 1 != b or self.base(b) == b:
                 for j in xrange(self.base(a), a + 1):
                     needed[j] = 1
                 for j in xrange(self.base(b), b + 1):
                     needed[j] = 1
 
         # calculate spans to retrieve from datafile
         needed = needed.keys()
         needed.sort()
         spans = []
         oo = -1
         ol = 0
         for n in needed:
             if n < 0: continue
             o = self.start(n)
             l = self.length(n)
             if oo + ol == o: # can we merge with the previous?
                 nl = spans[-1][2]
                 nl.append((n, l))
                 ol += l
                 spans[-1] = (oo, ol, nl)
             else:
                 oo = o
                 ol = l
                 spans.append((oo, ol, [(n, l)]))
 
         # read spans in, divide up chunks
         chunks = {}
         for span in spans:
             # we reopen the file for each span to make http happy for now
             f = self.opener(self.datafile)
             f.seek(span[0])
             data = f.read(span[1])
 
             # divide up the span
             pos = 0
             for r, l in span[2]:
                 chunks[r] = decompress(data[pos: pos + l])
                 pos += l
 
         # helper to reconstruct intermediate versions
         def construct(text, base, rev):
             bins = [chunks[r] for r in xrange(base + 1, rev + 1)]
             return mdiff.patches(text, bins)
 
         # build deltas
         deltas = []
         for d in xrange(0, len(revs) - 1):
             a, b = revs[d], revs[d + 1]
             n = self.node(b)
 
             # do we need to construct a new delta?
             if a + 1 != b or self.base(b) == b:
                 if a >= 0:
                     base = self.base(a)
                     ta = chunks[self.base(a)]
                     ta = construct(ta, base, a)
                 else:
                     ta = ""
 
                 base = self.base(b)
                 if a > base:
                     base = a
                     tb = ta
                 else:
                     tb = chunks[self.base(b)]
                 tb = construct(tb, base, b)
                 d = self.diff(ta, tb)
             else:
                 d = chunks[b]
 
             p = self.parents(n)
             meta = n + p[0] + p[1] + linkmap[self.linkrev(n)]
             l = struct.pack(">l", len(meta) + len(d) + 4)
             yield l
             yield meta
             yield d
 
         yield struct.pack(">l", 0)
 
     def addgroup(self, revs, linkmapper, transaction, unique=0):
         """
         add a delta group
 
         given a set of deltas, add them to the revision log. the
         first delta is against its parent, which should be in our
         log, the rest are against the previous delta.
         """
 
         #track the base of the current delta log
         r = self.count()
         t = r - 1
         node = nullid
 
         base = prev = -1
         start = end = measure = 0
         if r:
             start = self.start(self.base(t))
             end = self.end(t)
             measure = self.length(self.base(t))
             base = self.base(t)
             prev = self.tip()
 
         transaction.add(self.datafile, end)
         transaction.add(self.indexfile, r * struct.calcsize(indexformat))
         dfh = self.opener(self.datafile, "a")
         ifh = self.opener(self.indexfile, "a")
 
         # loop through our set of deltas
         chain = None
         for chunk in revs:
             node, p1, p2, cs = struct.unpack("20s20s20s20s", chunk[:80])
             link = linkmapper(cs)
             if node in self.nodemap:
                 # this can happen if two branches make the same change
-                if unique:
-                    raise RevlogError("already have %s" % hex(node[:4]))
+                # if unique:
+                #    raise RevlogError("already have %s" % hex(node[:4]))
                 chain = node
                 continue
             delta = chunk[80:]
 
             if not chain:
                 # retrieve the parent revision of the delta chain
                 chain = p1
                 if not chain in self.nodemap:
                     raise RevlogError("unknown base %s" % short(chain[:4]))
 
             # full versions are inserted when the needed deltas become
             # comparable to the uncompressed text or when the previous
             # version is not the one we have a delta against. We use
             # the size of the previous full rev as a proxy for the
             # current size.
 
             if chain == prev:
                 cdelta = compress(delta)
 
             if chain != prev or (end - start + len(cdelta)) > measure * 2:
                 # flush our writes here so we can read it in revision
                 dfh.flush()
                 ifh.flush()
                 text = self.revision(chain)
                 text = self.patches(text, [delta])
                 chk = self.addrevision(text, transaction, link, p1, p2)
                 if chk != node:
                     raise RevlogError("consistency error adding group")
                 measure = len(text)
             else:
                 e = (end, len(cdelta), self.base(t), link, p1, p2, node)
                 self.index.append(e)
                 self.nodemap[node] = r
                 dfh.write(cdelta)
                 ifh.write(struct.pack(indexformat, *e))
 
             t, r, chain, prev = r, r + 1, node, node
             start = self.start(self.base(t))
             end = self.end(t)
 
         dfh.close()
         ifh.close()
         return node