censor: add censor command to hgext with basic client-side tests

The censor command is a core extension which can replace the contents of a
historical file revision with a censor "tombstone" which can be exchanged
with older clients in place of the real revision data. The command rewrites
the filelog by copying revision-by-revision.

Care must be taken to expand the fulltext of the children of the censored
revision before copying them to the new filelog; they might be stored as
deltas against the uncensored revision, and those deltas will be invalidated.

For more background on the censorship feature design, see:
http://mercurial.selenic.com/wiki/CensorPlan

hgext/censor.py

@@ -0,0 +1,168 b''
+# Copyright (C) 2015 - Mike Edgar <[e-mail]>
+#
+# This extension enables removal of file content at a given revision,
+# rewriting the data/metadata of successive revisions to preserve revision log
+# integrity.
+
+"""erase file content at a given revision
+
+The censor command instructs Mercurial to erase all content of a file at a given
+revision *without updating the changeset hash.* This allows existing history to
+remain valid while preventing future clones/pulls from receiving the erased
+data.
+
+Typical uses for censor are due to security or legal requirements, including::
+
+ * Passwords, private keys, crytographic material
+ * Licensed data/code/libraries for which the license has expired
+ * Personally Identifiable Information or other private data
+
+Censored file revisions are listed in a tracked file called .hgcensored stored
+in the repository root. The censor command adds an entry to the .hgcensored file
+in the working directory and commits it (much like ``hg tag`` and .hgtags). The
+censored file data is then replaced with a pointer to the new commit, enabling
+verification.
+
+Censored nodes can interrupt mercurial's typical operation whenever the excised
+data needs to be materialized. Some commands, like ``hg cat``/``hg revert``,
+simply fail when asked to produce censored data. Others, like ``hg verify`` and
+``hg update``, must be capable of tolerating censored data to continue to
+function in a meaningful way. Such commands only tolerate censored file
+revisions if they are allowed by the policy specified by the "censor.allow"
+config option.
+"""
+
+from mercurial.node import short
+from mercurial import cmdutil, error, filelog, revlog, scmutil, util
+from mercurial.i18n import _
+
+cmdtable = {}
+command = cmdutil.command(cmdtable)
+testedwith = 'internal'
+
+@command('censor',
+    [('r', 'rev', '', _('censor file from specified revision'), _('REV')),
+     ('t', 'tombstone', '', _('replacement tombstone data'), _('TEXT'))],
+    _('-r REV [-t TEXT] [FILE]'))
+def censor(ui, repo, path, rev='', tombstone='', **opts):
+    if not path:
+        raise util.Abort(_('must specify file path to censor'))
+    if not rev:
+        raise util.Abort(_('must specify revision to censor'))
+
+    flog = repo.file(path)
+    if not len(flog):
+        raise util.Abort(_('cannot censor file with no history'))
+
+    rev = scmutil.revsingle(repo, rev, rev).rev()
+    try:
+        ctx = repo[rev]
+    except KeyError:
+        raise util.Abort(_('invalid revision identifier %s') % rev)
+
+    try:
+        fctx = ctx.filectx(path)
+    except error.LookupError:
+        raise util.Abort(_('file does not exist at revision %s') % rev)
+
+    fnode = fctx.filenode()
+    headctxs = [repo[c] for c in repo.heads()]
+    heads = [c for c in headctxs if path in c and c.filenode(path) == fnode]
+    if heads:
+        headlist = ', '.join([short(c.node()) for c in heads])
+        raise util.Abort(_('cannot censor file in heads (%s)') % headlist,
+            hint=_('clean/delete and commit first'))
+
+    wctx = repo[None]
+    wp = wctx.parents()
+    if ctx.node() in [p.node() for p in wp]:
+        raise util.Abort(_('cannot censor working directory'),
+            hint=_('clean/delete/update first'))
+
+    flogv = flog.version & 0xFFFF
+    if flogv != revlog.REVLOGNG:
+        raise util.Abort(
+            _('censor does not support revlog version %d') % (flogv,))
+
+    tombstone = filelog.packmeta({"censored": tombstone}, "")
+
+    crev = fctx.filerev()
+
+    if len(tombstone) > flog.rawsize(crev):
+        raise util.Abort(_(
+            'censor tombstone must be no longer than censored data'))
+
+    # Using two files instead of one makes it easy to rewrite entry-by-entry
+    idxread = repo.svfs(flog.indexfile, 'r')
+    idxwrite = repo.svfs(flog.indexfile, 'wb', atomictemp=True)
+    if flog.version & revlog.REVLOGNGINLINEDATA:
+        dataread, datawrite = idxread, idxwrite
+    else:
+        dataread = repo.svfs(flog.datafile, 'r')
+        datawrite = repo.svfs(flog.datafile, 'wb', atomictemp=True)
+
+    # Copy all revlog data up to the entry to be censored.
+    rio = revlog.revlogio()
+    offset = flog.start(crev)
+
+    for chunk in util.filechunkiter(idxread, limit=crev * rio.size):
+        idxwrite.write(chunk)
+    for chunk in util.filechunkiter(dataread, limit=offset):
+        datawrite.write(chunk)
+
+    def rewriteindex(r, newoffs, newdata=None):
+        """Rewrite the index entry with a new data offset and optional new data.
+
+        The newdata argument, if given, is a tuple of three positive integers:
+        (new compressed, new uncompressed, added flag bits).
+        """
+        offlags, comp, uncomp, base, link, p1, p2, nodeid = flog.index[r]
+        flags = revlog.gettype(offlags)
+        if newdata:
+            comp, uncomp, nflags = newdata
+            flags |= nflags
+        offlags = revlog.offset_type(newoffs, flags)
+        e = (offlags, comp, uncomp, r, link, p1, p2, nodeid)
+        idxwrite.write(rio.packentry(e, None, flog.version, r))
+        idxread.seek(rio.size, 1)
+
+    def rewrite(r, offs, data, nflags=revlog.REVIDX_DEFAULT_FLAGS):
+        """Write the given full text to the filelog with the given data offset.
+
+        Returns:
+            The integer number of data bytes written, for tracking data offsets.
+        """
+        flag, compdata = flog.compress(data)
+        newcomp = len(flag) + len(compdata)
+        rewriteindex(r, offs, (newcomp, len(data), nflags))
+        datawrite.write(flag)
+        datawrite.write(compdata)
+        dataread.seek(flog.length(r), 1)
+        return newcomp
+
+    # Rewrite censored revlog entry with (padded) tombstone data.
+    pad = ' ' * (flog.rawsize(crev) - len(tombstone))
+    offset += rewrite(crev, offset, tombstone + pad, revlog.REVIDX_ISCENSORED)
+
+    # Rewrite all following filelog revisions fixing up offsets and deltas.
+    for srev in xrange(crev + 1, len(flog)):
+        if crev in flog.parentrevs(srev):
+            # Immediate children of censored node must be re-added as fulltext.
+            try:
+                revdata = flog.revision(srev)
+            except error.CensoredNodeError, e:
+                revdata = e.tombstone
+            dlen = rewrite(srev, offset, revdata)
+        else:
+            # Copy any other revision data verbatim after fixing up the offset.
+            rewriteindex(srev, offset)
+            dlen = flog.length(srev)
+            for chunk in util.filechunkiter(dataread, limit=dlen):
+                datawrite.write(chunk)
+        offset += dlen
+
+    idxread.close()
+    idxwrite.close()
+    if dataread is not idxread:
+        dataread.close()
+        datawrite.close()

tests/test-censor.t

@@ -0,0 +1,315 b''
+  $ cat >> $HGRCPATH <<EOF
+  > [extensions]
+  > censor=
+  > EOF
+  $ cp $HGRCPATH $HGRCPATH.orig
+
+Create repo with unimpeachable content
+
+  $ hg init r
+  $ cd r
+  $ echo 'Initially untainted file' > target
+  $ echo 'Normal file here' > bystander
+  $ hg add target bystander
+  $ hg ci -m init
+
+Clone repo so we can test pull later
+
+  $ cd ..
+  $ hg clone r rpull
+  updating to branch default
+  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  $ cd r
+
+Introduce content which will ultimately require censorship. Name the first
+censored node C1, second C2, and so on
+
+  $ echo 'Tainted file' > target
+  $ echo 'Passwords: hunter2' >> target
+  $ hg ci -m taint target
+  $ C1=`hg id --debug -i`
+
+  $ echo 'hunter3' >> target
+  $ echo 'Normal file v2' > bystander
+  $ hg ci -m moretaint target bystander
+  $ C2=`hg id --debug -i`
+
+Add a new sanitized versions to correct our mistake. Name the first head H1,
+the second head H2, and so on
+
+  $ echo 'Tainted file is now sanitized' > target
+  $ hg ci -m sanitized target
+  $ H1=`hg id --debug -i`
+
+  $ hg update -r $C2
+  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  $ echo 'Tainted file now super sanitized' > target
+  $ hg ci -m 'super sanitized' target
+  created new head
+  $ H2=`hg id --debug -i`
+
+Verify target contents before censorship at each revision
+
+  $ hg cat -r 3 target
+  Tainted file is now sanitized
+  $ hg cat -r $H2 target
+  Tainted file now super sanitized
+  $ hg cat -r $C2 target
+  Tainted file
+  Passwords: hunter2
+  hunter3
+  $ hg cat -r $C1 target
+  Tainted file
+  Passwords: hunter2
+  $ hg cat -r 0 target
+  Initially untainted file
+
+Try to censor revision with too large of a tombstone message
+
+  $ hg censor -r $C1 -t 'blah blah blah blah blah blah blah blah bla' target
+  abort: censor tombstone must be no longer than censored data
+  [255]
+
+Censor revision with 2 offenses
+
+  $ hg censor -r $C2 -t "remove password" target
+  $ hg cat -r 3 target
+  Tainted file is now sanitized
+  $ hg cat -r $H2 target
+  Tainted file now super sanitized
+  $ hg cat -r $C2 target
+  abort: censored node: 1e0247a9a4b7
+  (set censor.policy to ignore errors)
+  [255]
+  $ hg cat -r $C1 target
+  Tainted file
+  Passwords: hunter2
+  $ hg cat -r 0 target
+  Initially untainted file
+
+Censor revision with 1 offense
+
+  $ hg censor -r $C1 target
+  $ hg cat -r 3 target
+  Tainted file is now sanitized
+  $ hg cat -r $H2 target
+  Tainted file now super sanitized
+  $ hg cat -r $C2 target
+  abort: censored node: 1e0247a9a4b7
+  (set censor.policy to ignore errors)
+  [255]
+  $ hg cat -r $C1 target
+  abort: censored node: 613bc869fceb
+  (set censor.policy to ignore errors)
+  [255]
+  $ hg cat -r 0 target
+  Initially untainted file
+
+Can only checkout target at uncensored revisions, -X is workaround for --all
+
+  $ hg revert -r $C2 target
+  abort: censored node: 1e0247a9a4b7
+  (set censor.policy to ignore errors)
+  [255]
+  $ hg revert -r $C1 target
+  abort: censored node: 613bc869fceb
+  (set censor.policy to ignore errors)
+  [255]
+  $ hg revert -r $C1 --all
+  reverting bystander
+  reverting target
+  abort: censored node: 613bc869fceb
+  (set censor.policy to ignore errors)
+  [255]
+  $ hg revert -r $C1 --all -X target
+  $ cat target
+  Tainted file now super sanitized
+  $ hg revert -r 0 --all
+  reverting target
+  $ cat target
+  Initially untainted file
+  $ hg revert -r $H2 --all
+  reverting bystander
+  reverting target
+  $ cat target
+  Tainted file now super sanitized
+
+Uncensored file can be viewed at any revision
+
+  $ hg cat -r 3 bystander
+  Normal file v2
+  $ hg cat -r $C2 bystander
+  Normal file v2
+  $ hg cat -r $C1 bystander
+  Normal file here
+  $ hg cat -r 0 bystander
+  Normal file here
+
+Can update to children of censored revision
+
+  $ hg update -r 3
+  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  $ cat target
+  Tainted file is now sanitized
+  $ hg update -r $H2
+  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  $ cat target
+  Tainted file now super sanitized
+
+Set censor policy to abort in trusted $HGRC so hg verify fails
+
+  $ cp $HGRCPATH.orig $HGRCPATH
+  $ cat >> $HGRCPATH <<EOF
+  > [censor]
+  > policy = abort
+  > EOF
+
+Repo fails verification due to censorship
+
+  $ hg verify
+  checking changesets
+  checking manifests
+  crosschecking files in changesets and manifests
+  checking files
+   target@1: censored file data
+   target@2: censored file data
+  2 files, 5 changesets, 7 total revisions
+  2 integrity errors encountered!
+  (first damaged changeset appears to be 1)
+  [1]
+
+Cannot update to revision with censored data
+
+  $ hg update -r $C2
+  abort: censored node: 1e0247a9a4b7
+  (set censor.policy to ignore errors)
+  [255]
+  $ hg update -r $C1
+  abort: censored node: 613bc869fceb
+  (set censor.policy to ignore errors)
+  [255]
+  $ hg update -r 0
+  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  $ hg update -r $H2
+  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
+
+Set censor policy to ignore in trusted $HGRC so hg verify passes
+
+  $ cp $HGRCPATH.orig $HGRCPATH
+  $ cat >> $HGRCPATH <<EOF
+  > [censor]
+  > policy = ignore
+  > EOF
+
+Repo passes verification with warnings with explicit config
+
+  $ hg verify
+  checking changesets
+  checking manifests
+  crosschecking files in changesets and manifests
+  checking files
+  2 files, 5 changesets, 7 total revisions
+
+May update to revision with censored data with explicit config
+
+  $ hg update -r $C2
+  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  $ cat target
+  $ hg update -r $C1
+  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  $ cat target
+  $ hg update -r 0
+  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  $ cat target
+  Initially untainted file
+  $ hg update -r $H2
+  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  $ cat target
+  Tainted file now super sanitized
+
+Can merge in revision with censored data. Test requires one branch of history
+with the file censored, but we can't censor at a head, so advance H1.
+
+  $ hg update -r $H1
+  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  $ C3=$H1
+  $ echo 'advanced head H1' > target
+  $ hg ci -m 'advance head H1' target
+  $ H1=`hg id --debug -i`
+  $ hg censor -r $C3 target
+  $ hg update -r $H2
+  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  $ hg merge -r $C3
+  merging target
+  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
+  (branch merge, don't forget to commit)
+
+Revisions present in repository heads may not be censored
+
+  $ hg update -C -r $H2
+  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  $ hg censor -r $H2 target
+  abort: cannot censor file in heads (78a8fc215e79)
+  (clean/delete and commit first)
+  [255]
+  $ echo 'twiddling thumbs' > bystander
+  $ hg ci -m 'bystander commit'
+  $ H2=`hg id --debug -i`
+  $ hg censor -r "$H2^" target
+  abort: cannot censor file in heads (efbe78065929)
+  (clean/delete and commit first)
+  [255]
+
+Cannot censor working directory
+
+  $ echo 'seriously no passwords' > target
+  $ hg ci -m 'extend second head arbitrarily' target
+  $ H2=`hg id --debug -i`
+  $ hg update -r "$H2^"
+  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  $ hg censor -r . target
+  abort: cannot censor working directory
+  (clean/delete/update first)
+  [255]
+  $ hg update -r $H2
+  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
+
+Can re-add file after being deleted + censored
+
+  $ C4=$H2
+  $ hg rm target
+  $ hg ci -m 'delete target so it may be censored'
+  $ H2=`hg id --debug -i`
+  $ hg censor -r $C4 target
+  $ hg cat -r $C4 target
+  $ hg cat -r "$H2^^" target
+  Tainted file now super sanitized
+  $ echo 'fresh start' > target
+  $ hg add target
+  $ hg ci -m reincarnated target
+  $ H2=`hg id --debug -i`
+  $ hg cat -r $H2 target
+  fresh start
+  $ hg cat -r "$H2^" target
+  target: no such file in rev 452ec1762369
+  [1]
+  $ hg cat -r $C4 target
+  $ hg cat -r "$H2^^^" target
+  Tainted file now super sanitized
+
+Can censor after revlog has expanded to no longer permit inline storage
+
+  $ for x in `seq 0 50000`
+  > do
+  >   echo "Password: hunter$x" >> target
+  > done
+  $ hg ci -m 'add 100k passwords'
+  $ H2=`hg id --debug -i`
+  $ C5=$H2
+  $ hg revert -r "$H2^" target
+  $ hg ci -m 'cleaned 100k passwords'
+  $ H2=`hg id --debug -i`
+  $ hg censor -r $C5 target
+  $ hg cat -r $C5 target
+  $ hg cat -r $H2 target
+  fresh start

tests/test-help.t

@@ -1,2240 +1,2241 b''
 Short help:
 
   $ hg
   Mercurial Distributed SCM
   
   basic commands:
   
    add           add the specified files on the next commit
    annotate      show changeset information by line for each file
    clone         make a copy of an existing repository
    commit        commit the specified files or all outstanding changes
    diff          diff repository (or selected files)
    export        dump the header and diffs for one or more changesets
    forget        forget the specified files on the next commit
    init          create a new repository in the given directory
    log           show revision history of entire repository or files
    merge         merge another revision into working directory
    pull          pull changes from the specified source
    push          push changes to the specified destination
    remove        remove the specified files on the next commit
    serve         start stand-alone webserver
    status        show changed files in the working directory
    summary       summarize working directory state
    update        update working directory (or switch revisions)
   
   (use "hg help" for the full list of commands or "hg -v" for details)
 
   $ hg -q
    add           add the specified files on the next commit
    annotate      show changeset information by line for each file
    clone         make a copy of an existing repository
    commit        commit the specified files or all outstanding changes
    diff          diff repository (or selected files)
    export        dump the header and diffs for one or more changesets
    forget        forget the specified files on the next commit
    init          create a new repository in the given directory
    log           show revision history of entire repository or files
    merge         merge another revision into working directory
    pull          pull changes from the specified source
    push          push changes to the specified destination
    remove        remove the specified files on the next commit
    serve         start stand-alone webserver
    status        show changed files in the working directory
    summary       summarize working directory state
    update        update working directory (or switch revisions)
 
   $ hg help
   Mercurial Distributed SCM
   
   list of commands:
   
    add           add the specified files on the next commit
    addremove     add all new files, delete all missing files
    annotate      show changeset information by line for each file
    archive       create an unversioned archive of a repository revision
    backout       reverse effect of earlier changeset
    bisect        subdivision search of changesets
    bookmarks     create a new bookmark or list existing bookmarks
    branch        set or show the current branch name
    branches      list repository named branches
    bundle        create a changegroup file
    cat           output the current or given revision of files
    clone         make a copy of an existing repository
    commit        commit the specified files or all outstanding changes
    config        show combined config settings from all hgrc files
    copy          mark files as copied for the next commit
    diff          diff repository (or selected files)
    export        dump the header and diffs for one or more changesets
    files         list tracked files
    forget        forget the specified files on the next commit
    graft         copy changes from other branches onto the current branch
    grep          search for a pattern in specified files and revisions
    heads         show branch heads
    help          show help for a given topic or a help overview
    identify      identify the working copy or specified revision
    import        import an ordered set of patches
    incoming      show new changesets found in source
    init          create a new repository in the given directory
    log           show revision history of entire repository or files
    manifest      output the current or given revision of the project manifest
    merge         merge another revision into working directory
    outgoing      show changesets not found in the destination
    paths         show aliases for remote repositories
    phase         set or show the current phase name
    pull          pull changes from the specified source
    push          push changes to the specified destination
    recover       roll back an interrupted transaction
    remove        remove the specified files on the next commit
    rename        rename files; equivalent of copy + remove
    resolve       redo merges or set/view the merge status of files
    revert        restore files to their checkout state
    root          print the root (top) of the current working directory
    serve         start stand-alone webserver
    status        show changed files in the working directory
    summary       summarize working directory state
    tag           add one or more tags for the current or given revision
    tags          list repository tags
    unbundle      apply one or more changegroup files
    update        update working directory (or switch revisions)
    verify        verify the integrity of the repository
    version       output version and copyright information
   
   additional help topics:
   
    config        Configuration Files
    dates         Date Formats
    diffs         Diff Formats
    environment   Environment Variables
    extensions    Using Additional Features
    filesets      Specifying File Sets
    glossary      Glossary
    hgignore      Syntax for Mercurial Ignore Files
    hgweb         Configuring hgweb
    merge-tools   Merge Tools
    multirevs     Specifying Multiple Revisions
    patterns      File Name Patterns
    phases        Working with Phases
    revisions     Specifying Single Revisions
    revsets       Specifying Revision Sets
    subrepos      Subrepositories
    templating    Template Usage
    urls          URL Paths
   
   (use "hg help -v" to show built-in aliases and global options)
 
   $ hg -q help
    add           add the specified files on the next commit
    addremove     add all new files, delete all missing files
    annotate      show changeset information by line for each file
    archive       create an unversioned archive of a repository revision
    backout       reverse effect of earlier changeset
    bisect        subdivision search of changesets
    bookmarks     create a new bookmark or list existing bookmarks
    branch        set or show the current branch name
    branches      list repository named branches
    bundle        create a changegroup file
    cat           output the current or given revision of files
    clone         make a copy of an existing repository
    commit        commit the specified files or all outstanding changes
    config        show combined config settings from all hgrc files
    copy          mark files as copied for the next commit
    diff          diff repository (or selected files)
    export        dump the header and diffs for one or more changesets
    files         list tracked files
    forget        forget the specified files on the next commit
    graft         copy changes from other branches onto the current branch
    grep          search for a pattern in specified files and revisions
    heads         show branch heads
    help          show help for a given topic or a help overview
    identify      identify the working copy or specified revision
    import        import an ordered set of patches
    incoming      show new changesets found in source
    init          create a new repository in the given directory
    log           show revision history of entire repository or files
    manifest      output the current or given revision of the project manifest
    merge         merge another revision into working directory
    outgoing      show changesets not found in the destination
    paths         show aliases for remote repositories
    phase         set or show the current phase name
    pull          pull changes from the specified source
    push          push changes to the specified destination
    recover       roll back an interrupted transaction
    remove        remove the specified files on the next commit
    rename        rename files; equivalent of copy + remove
    resolve       redo merges or set/view the merge status of files
    revert        restore files to their checkout state
    root          print the root (top) of the current working directory
    serve         start stand-alone webserver
    status        show changed files in the working directory
    summary       summarize working directory state
    tag           add one or more tags for the current or given revision
    tags          list repository tags
    unbundle      apply one or more changegroup files
    update        update working directory (or switch revisions)
    verify        verify the integrity of the repository
    version       output version and copyright information
   
   additional help topics:
   
    config        Configuration Files
    dates         Date Formats
    diffs         Diff Formats
    environment   Environment Variables
    extensions    Using Additional Features
    filesets      Specifying File Sets
    glossary      Glossary
    hgignore      Syntax for Mercurial Ignore Files
    hgweb         Configuring hgweb
    merge-tools   Merge Tools
    multirevs     Specifying Multiple Revisions
    patterns      File Name Patterns
    phases        Working with Phases
    revisions     Specifying Single Revisions
    revsets       Specifying Revision Sets
    subrepos      Subrepositories
    templating    Template Usage
    urls          URL Paths
 
 Test extension help:
   $ hg help extensions --config extensions.rebase= --config extensions.children=
   Using Additional Features
   """""""""""""""""""""""""
   
       Mercurial has the ability to add new features through the use of
       extensions. Extensions may add new commands, add options to existing
       commands, change the default behavior of commands, or implement hooks.
   
       To enable the "foo" extension, either shipped with Mercurial or in the
       Python search path, create an entry for it in your configuration file,
       like this:
   
         [extensions]
         foo =
   
       You may also specify the full path to an extension:
   
         [extensions]
         myfeature = ~/.hgext/myfeature.py
   
       See "hg help config" for more information on configuration files.
   
       Extensions are not loaded by default for a variety of reasons: they can
       increase startup overhead; they may be meant for advanced usage only; they
       may provide potentially dangerous abilities (such as letting you destroy
       or modify history); they might not be ready for prime time; or they may
       alter some usual behaviors of stock Mercurial. It is thus up to the user
       to activate extensions as needed.
   
       To explicitly disable an extension enabled in a configuration file of
       broader scope, prepend its path with !:
   
         [extensions]
         # disabling extension bar residing in /path/to/extension/bar.py
         bar = !/path/to/extension/bar.py
         # ditto, but no path was supplied for extension baz
         baz = !
   
       enabled extensions:
   
        children      command to display child changesets (DEPRECATED)
        rebase        command to move sets of revisions to a different ancestor
   
       disabled extensions:
   
        acl           hooks for controlling repository access
        blackbox      log repository events to a blackbox for debugging
        bugzilla      hooks for integrating with the Bugzilla bug tracker
+       censor        erase file content at a given revision
        churn         command to display statistics about repository history
        color         colorize output from some commands
        convert       import revisions from foreign VCS repositories into
                      Mercurial
        eol           automatically manage newlines in repository files
        extdiff       command to allow external programs to compare revisions
        factotum      http authentication with factotum
        gpg           commands to sign and verify changesets
        hgcia         hooks for integrating with the CIA.vc notification service
        hgk           browse the repository in a graphical way
        highlight     syntax highlighting for hgweb (requires Pygments)
        histedit      interactive history editing
        keyword       expand keywords in tracked files
        largefiles    track large binary files
        mq            manage a stack of patches
        notify        hooks for sending email push notifications
        pager         browse command output with an external pager
        patchbomb     command to send changesets as (a series of) patch emails
        progress      show progress bars for some actions
        purge         command to delete untracked files from the working
                      directory
        record        commands to interactively select changes for
                      commit/qrefresh
        relink        recreates hardlinks between repository clones
        schemes       extend schemes with shortcuts to repository swarms
        share         share a common history between several working directories
        shelve        save and restore changes to the working directory
        strip         strip changesets and their descendants from history
        transplant    command to transplant changesets from another branch
        win32mbcs     allow the use of MBCS paths with problematic encodings
        zeroconf      discover and advertise repositories on the local network
 Test short command list with verbose option
 
   $ hg -v help shortlist
   Mercurial Distributed SCM
   
   basic commands:
   
    add           add the specified files on the next commit
    annotate, blame
                  show changeset information by line for each file
    clone         make a copy of an existing repository
    commit, ci    commit the specified files or all outstanding changes
    diff          diff repository (or selected files)
    export        dump the header and diffs for one or more changesets
    forget        forget the specified files on the next commit
    init          create a new repository in the given directory
    log, history  show revision history of entire repository or files
    merge         merge another revision into working directory
    pull          pull changes from the specified source
    push          push changes to the specified destination
    remove, rm    remove the specified files on the next commit
    serve         start stand-alone webserver
    status, st    show changed files in the working directory
    summary, sum  summarize working directory state
    update, up, checkout, co
                  update working directory (or switch revisions)
   
   global options ([+] can be repeated):
   
    -R --repository REPO   repository root directory or name of overlay bundle
                           file
       --cwd DIR           change working directory
    -y --noninteractive    do not prompt, automatically pick the first choice for
                           all prompts
    -q --quiet             suppress output
    -v --verbose           enable additional output
       --config CONFIG [+] set/override config option (use 'section.name=value')
       --debug             enable debugging output
       --debugger          start debugger
       --encoding ENCODE   set the charset encoding (default: ascii)
       --encodingmode MODE set the charset encoding mode (default: strict)
       --traceback         always print a 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
       --hidden            consider hidden changesets
   
   (use "hg help" for the full list of commands)
 
   $ hg add -h
   hg add [OPTION]... [FILE]...
   
   add the specified files on the next commit
   
       Schedule files to be version controlled and added to the repository.
   
       The files will be added to the repository at the next commit. To undo an
       add before that, see "hg forget".
   
       If no names are given, add all files to the repository.
   
       Returns 0 if all files are successfully added.
   
   options ([+] can be repeated):
   
    -I --include PATTERN [+] include names matching the given patterns
    -X --exclude PATTERN [+] exclude names matching the given patterns
    -S --subrepos            recurse into subrepositories
    -n --dry-run             do not perform actions, just print output
   
   (some details hidden, use --verbose to show complete help)
 
 Verbose help for add
 
   $ hg add -hv
   hg add [OPTION]... [FILE]...
   
   add the specified files on the next commit
   
       Schedule files to be version controlled and added to the repository.
   
       The files will be added to the repository at the next commit. To undo an
       add before that, see "hg forget".
   
       If no names are given, add all files to the repository.
   
       An example showing how new (unknown) files are added automatically by "hg
       add":
   
         $ ls
         foo.c
         $ hg status
         ? foo.c
         $ hg add
         adding foo.c
         $ hg status
         A foo.c
   
       Returns 0 if all files are successfully added.
   
   options ([+] can be repeated):
   
    -I --include PATTERN [+] include names matching the given patterns
    -X --exclude PATTERN [+] exclude names matching the given patterns
    -S --subrepos            recurse into subrepositories
    -n --dry-run             do not perform actions, just print output
   
   global options ([+] can be repeated):
   
    -R --repository REPO   repository root directory or name of overlay bundle
                           file
       --cwd DIR           change working directory
    -y --noninteractive    do not prompt, automatically pick the first choice for
                           all prompts
    -q --quiet             suppress output
    -v --verbose           enable additional output
       --config CONFIG [+] set/override config option (use 'section.name=value')
       --debug             enable debugging output
       --debugger          start debugger
       --encoding ENCODE   set the charset encoding (default: ascii)
       --encodingmode MODE set the charset encoding mode (default: strict)
       --traceback         always print a 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
       --hidden            consider hidden changesets
 
 Test help option with version option
 
   $ hg add -h --version
   Mercurial Distributed SCM (version *) (glob)
   (see http://mercurial.selenic.com for more information)
   
   Copyright (C) 2005-2015 Matt Mackall and others
   This is free software; see the source for copying conditions. There is NO
   warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 
   $ hg add --skjdfks
   hg add: option --skjdfks not recognized
   hg add [OPTION]... [FILE]...
   
   add the specified files on the next commit
   
   options ([+] can be repeated):
   
    -I --include PATTERN [+] include names matching the given patterns
    -X --exclude PATTERN [+] exclude names matching the given patterns
    -S --subrepos            recurse into subrepositories
    -n --dry-run             do not perform actions, just print output
   
   (use "hg add -h" to show more help)
   [255]
 
 Test ambiguous command help
 
   $ hg help ad
   list of commands:
   
    add           add the specified files on the next commit
    addremove     add all new files, delete all missing files
   
   (use "hg help -v ad" to show built-in aliases and global options)
 
 Test command without options
 
   $ hg help verify
   hg verify
   
   verify the integrity of the repository
   
       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.
   
       Please see http://mercurial.selenic.com/wiki/RepositoryCorruption for more
       information about recovery from corruption of the repository.
   
       Returns 0 on success, 1 if errors are encountered.
   
   (some details hidden, use --verbose to show complete help)
 
   $ hg help diff
   hg diff [OPTION]... ([-c REV] | [-r REV1 [-r REV2]]) [FILE]...
   
   diff repository (or selected files)
   
       Show differences between revisions for the specified files.
   
       Differences between files are shown using the unified diff format.
   
       Note:
          diff may generate unexpected results for merges, as it will default to
          comparing against the working directory's first parent changeset if no
          revisions are specified.
   
       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.
   
       Alternatively you can specify -c/--change with a revision to see the
       changes in that changeset relative to its first parent.
   
       Without the -a/--text option, diff will avoid generating diffs of files it
       detects as binary. With -a, diff will generate a diff anyway, probably
       with undesirable results.
   
       Use the -g/--git option to generate diffs in the git extended diff format.
       For more information, read "hg help diffs".
   
       Returns 0 on success.
   
   options ([+] can be repeated):
   
    -r --rev REV [+]         revision
    -c --change REV          change made by revision
    -a --text                treat all files as text
    -g --git                 use git extended diff format
       --nodates             omit dates from diff headers
       --noprefix            omit a/ and b/ prefixes from filenames
    -p --show-function       show which function each change is in
       --reverse             produce a diff that undoes the changes
    -w --ignore-all-space    ignore white space when comparing lines
    -b --ignore-space-change ignore changes in the amount of white space
    -B --ignore-blank-lines  ignore changes whose lines are all blank
    -U --unified NUM         number of lines of context to show
       --stat                output diffstat-style summary of changes
    -I --include PATTERN [+] include names matching the given patterns
    -X --exclude PATTERN [+] exclude names matching the given patterns
    -S --subrepos            recurse into subrepositories
   
   (some details hidden, use --verbose to show complete help)
 
   $ hg help status
   hg status [OPTION]... [FILE]...
   
   aliases: st
   
   show changed files in the working directory
   
       Show status of files in the repository. If names are given, only files
       that match are shown. Files that are clean or ignored or the source of a
       copy/move operation, are not listed unless -c/--clean, -i/--ignored,
       -C/--copies or -A/--all are given. Unless options described with "show
       only ..." are given, the options -mardu are used.
   
       Option -q/--quiet hides untracked (unknown and ignored) files unless
       explicitly requested with -u/--unknown or -i/--ignored.
   
       Note:
          status may appear to disagree with diff if permissions have changed or
          a merge has occurred. The standard diff format does not report
          permission changes and diff only reports changes relative to one merge
          parent.
   
       If one revision is given, it is used as the base revision. If two
       revisions are given, the differences between them are shown. The --change
       option can also be used as a shortcut to list the changed files of a
       revision from its first parent.
   
       The codes used to show the status of files are:
   
         M = modified
         A = added
         R = removed
         C = clean
         ! = missing (deleted by non-hg command, but still tracked)
         ? = not tracked
         I = ignored
           = origin of the previous file (with --copies)
   
       Returns 0 on success.
   
   options ([+] can be repeated):
   
    -A --all                 show status of all files
    -m --modified            show only modified files
    -a --added               show only added files
    -r --removed             show only removed files
    -d --deleted             show only deleted (but tracked) files
    -c --clean               show only files without changes
    -u --unknown             show only unknown (not tracked) files
    -i --ignored             show only ignored files
    -n --no-status           hide status prefix
    -C --copies              show source of copied files
    -0 --print0              end filenames with NUL, for use with xargs
       --rev REV [+]         show difference from revision
       --change REV          list the changed files of a revision
    -I --include PATTERN [+] include names matching the given patterns
    -X --exclude PATTERN [+] exclude names matching the given patterns
    -S --subrepos            recurse into subrepositories
   
   (some details hidden, use --verbose to show complete help)
 
   $ hg -q help status
   hg status [OPTION]... [FILE]...
   
   show changed files in the working directory
 
   $ hg help foo
   abort: no such help topic: foo
   (try "hg help --keyword foo")
   [255]
 
   $ hg skjdfks
   hg: unknown command 'skjdfks'
   Mercurial Distributed SCM
   
   basic commands:
   
    add           add the specified files on the next commit
    annotate      show changeset information by line for each file
    clone         make a copy of an existing repository
    commit        commit the specified files or all outstanding changes
    diff          diff repository (or selected files)
    export        dump the header and diffs for one or more changesets
    forget        forget the specified files on the next commit
    init          create a new repository in the given directory
    log           show revision history of entire repository or files
    merge         merge another revision into working directory
    pull          pull changes from the specified source
    push          push changes to the specified destination
    remove        remove the specified files on the next commit
    serve         start stand-alone webserver
    status        show changed files in the working directory
    summary       summarize working directory state
    update        update working directory (or switch revisions)
   
   (use "hg help" for the full list of commands or "hg -v" for details)
   [255]
 
 
   $ cat > helpext.py <<EOF
   > import os
   > from mercurial import cmdutil, commands
   > 
   > cmdtable = {}
   > command = cmdutil.command(cmdtable)
   > 
   > @command('nohelp',
   >     [('', 'longdesc', 3, 'x'*90),
   >     ('n', '', None, 'normal desc'),
   >     ('', 'newline', '', 'line1\nline2')],
   >     'hg nohelp',
   >     norepo=True)
   > @command('debugoptDEP', [('', 'dopt', None, 'option is DEPRECATED')])
   > def nohelp(ui, *args, **kwargs):
   >     pass
   > 
   > EOF
   $ echo '[extensions]' >> $HGRCPATH
   $ echo "helpext = `pwd`/helpext.py" >> $HGRCPATH
 
 Test command with no help text
 
   $ hg help nohelp
   hg nohelp
   
   (no help text available)
   
   options:
   
       --longdesc VALUE xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
                        xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx (default: 3)
    -n --               normal desc
       --newline VALUE  line1 line2
   
   (some details hidden, use --verbose to show complete help)
 
   $ hg help -k nohelp
   Commands:
   
    nohelp hg nohelp
   
   Extension Commands:
   
    nohelp (no help text available)
 
 Test that default list of commands omits extension commands
 
   $ hg help
   Mercurial Distributed SCM
   
   list of commands:
   
    add           add the specified files on the next commit
    addremove     add all new files, delete all missing files
    annotate      show changeset information by line for each file
    archive       create an unversioned archive of a repository revision
    backout       reverse effect of earlier changeset
    bisect        subdivision search of changesets
    bookmarks     create a new bookmark or list existing bookmarks
    branch        set or show the current branch name
    branches      list repository named branches
    bundle        create a changegroup file
    cat           output the current or given revision of files
    clone         make a copy of an existing repository
    commit        commit the specified files or all outstanding changes
    config        show combined config settings from all hgrc files
    copy          mark files as copied for the next commit
    diff          diff repository (or selected files)
    export        dump the header and diffs for one or more changesets
    files         list tracked files
    forget        forget the specified files on the next commit
    graft         copy changes from other branches onto the current branch
    grep          search for a pattern in specified files and revisions
    heads         show branch heads
    help          show help for a given topic or a help overview
    identify      identify the working copy or specified revision
    import        import an ordered set of patches
    incoming      show new changesets found in source
    init          create a new repository in the given directory
    log           show revision history of entire repository or files
    manifest      output the current or given revision of the project manifest
    merge         merge another revision into working directory
    outgoing      show changesets not found in the destination
    paths         show aliases for remote repositories
    phase         set or show the current phase name
    pull          pull changes from the specified source
    push          push changes to the specified destination
    recover       roll back an interrupted transaction
    remove        remove the specified files on the next commit
    rename        rename files; equivalent of copy + remove
    resolve       redo merges or set/view the merge status of files
    revert        restore files to their checkout state
    root          print the root (top) of the current working directory
    serve         start stand-alone webserver
    status        show changed files in the working directory
    summary       summarize working directory state
    tag           add one or more tags for the current or given revision
    tags          list repository tags
    unbundle      apply one or more changegroup files
    update        update working directory (or switch revisions)
    verify        verify the integrity of the repository
    version       output version and copyright information
   
   enabled extensions:
   
    helpext       (no help text available)
   
   additional help topics:
   
    config        Configuration Files
    dates         Date Formats
    diffs         Diff Formats
    environment   Environment Variables
    extensions    Using Additional Features
    filesets      Specifying File Sets
    glossary      Glossary
    hgignore      Syntax for Mercurial Ignore Files
    hgweb         Configuring hgweb
    merge-tools   Merge Tools
    multirevs     Specifying Multiple Revisions
    patterns      File Name Patterns
    phases        Working with Phases
    revisions     Specifying Single Revisions
    revsets       Specifying Revision Sets
    subrepos      Subrepositories
    templating    Template Usage
    urls          URL Paths
   
   (use "hg help -v" to show built-in aliases and global options)
 
 
 Test list of internal help commands
 
   $ hg help debug
   debug commands (internal and unsupported):
   
    debugancestor
                  find the ancestor revision of two revisions in a given index
    debugbuilddag
                  builds a repo with a given DAG from scratch in the current
                  empty repo
    debugbundle   lists the contents of a bundle
    debugcheckstate
                  validate the correctness of the current dirstate
    debugcommands
                  list all available commands and options
    debugcomplete
                  returns the completion list associated with the given command
    debugdag      format the changelog or an index DAG as a concise textual
                  description
    debugdata     dump the contents of a data file revision
    debugdate     parse and display a date
    debugdirstate
                  show the contents of the current dirstate
    debugdiscovery
                  runs the changeset discovery protocol in isolation
    debugfileset  parse and apply a fileset specification
    debugfsinfo   show information detected about current filesystem
    debuggetbundle
                  retrieves a bundle from a repo
    debugignore   display the combined ignore pattern
    debugindex    dump the contents of an index file
    debugindexdot
                  dump an index DAG as a graphviz dot file
    debuginstall  test Mercurial installation
    debugknown    test whether node ids are known to a repo
    debuglocks    show or modify state of locks
    debugnamecomplete
                  complete "names" - tags, open branch names, bookmark names
    debugobsolete
                  create arbitrary obsolete marker
    debugoptDEP   (no help text available)
    debugpathcomplete
                  complete part or all of a tracked path
    debugpushkey  access the pushkey key/value protocol
    debugpvec     (no help text available)
    debugrebuilddirstate
                  rebuild the dirstate as it would look like for the given
                  revision
    debugrename   dump rename information
    debugrevlog   show data and statistics about a revlog
    debugrevspec  parse and apply a revision specification
    debugsetparents
                  manually set the parents of the current working directory
    debugsub      (no help text available)
    debugsuccessorssets
                  show set of successors for revision
    debugwalk     show how files match on given patterns
    debugwireargs
                  (no help text available)
   
   (use "hg help -v debug" to show built-in aliases and global options)
 
 
 Test list of commands with command with no help text
 
   $ hg help helpext
   helpext extension - no help text available
   
   list of commands:
   
    nohelp        (no help text available)
   
   (use "hg help -v helpext" to show built-in aliases and global options)
 
 
 test deprecated option is hidden in command help
   $ hg help debugoptDEP
   hg debugoptDEP
   
   (no help text available)
   
   options:
   
   (some details hidden, use --verbose to show complete help)
 
 test deprecated option is shown with -v
   $ hg help -v debugoptDEP | grep dopt
     --dopt option is DEPRECATED
 
 #if gettext
 test deprecated option is hidden with translation with untranslated description
 (use many globy for not failing on changed transaction)
   $ LANGUAGE=sv hg help debugoptDEP
   hg debugoptDEP
   
   (*) (glob)
   
   options:
   
   (some details hidden, use --verbose to show complete help)
 #endif
 
 Test commands that collide with topics (issue4240)
 
   $ hg config -hq
   hg config [-u] [NAME]...
   
   show combined config settings from all hgrc files
   $ hg showconfig -hq
   hg config [-u] [NAME]...
   
   show combined config settings from all hgrc files
 
 Test a help topic
 
   $ hg help revs
   Specifying Single Revisions
   """""""""""""""""""""""""""
   
       Mercurial supports several ways to specify individual revisions.
   
       A plain integer is treated as a revision number. Negative integers are
       treated as sequential offsets from the tip, with -1 denoting the tip, -2
       denoting the revision prior to the tip, and so forth.
   
       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 is referred to as a short-form identifier. A
       short-form identifier is only valid if it is the prefix of exactly one
       full-length identifier.
   
       Any other string is treated as a bookmark, tag, or branch name. A bookmark
       is a movable pointer to a revision. A tag is a permanent name associated
       with a revision. A branch name denotes the tipmost open branch head of
       that branch - or if they are all closed, the tipmost closed head of the
       branch. Bookmark, tag, and branch names must not contain the ":"
       character.
   
       The reserved name "tip" always identifies the most recent revision.
   
       The reserved name "null" indicates the null revision. This is the revision
       of an empty repository, and the parent of revision 0.
   
       The reserved name "." indicates the working directory parent. If no
       working directory is checked out, it is equivalent to null. If an
       uncommitted merge is in progress, "." is the revision of the first parent.
 
 Test templating help
 
   $ hg help templating | egrep '(desc|diffstat|firstline|nonempty)  '
       desc          String. The text of the changeset description.
       diffstat      String. Statistics of changes with the following format:
       firstline     Any text. Returns the first line of text.
       nonempty      Any text. Returns '(none)' if the string is empty.
 
 Test help hooks
 
   $ cat > helphook1.py <<EOF
   > from mercurial import help
   > 
   > def rewrite(topic, doc):
   >     return doc + '\nhelphook1\n'
   > 
   > def extsetup(ui):
   >     help.addtopichook('revsets', rewrite)
   > EOF
   $ cat > helphook2.py <<EOF
   > from mercurial import help
   > 
   > def rewrite(topic, doc):
   >     return doc + '\nhelphook2\n'
   > 
   > def extsetup(ui):
   >     help.addtopichook('revsets', rewrite)
   > EOF
   $ echo '[extensions]' >> $HGRCPATH
   $ echo "helphook1 = `pwd`/helphook1.py" >> $HGRCPATH
   $ echo "helphook2 = `pwd`/helphook2.py" >> $HGRCPATH
   $ hg help revsets | grep helphook
       helphook1
       helphook2
 
 Test keyword search help
 
   $ cat > prefixedname.py <<EOF
   > '''matched against word "clone"
   > '''
   > EOF
   $ echo '[extensions]' >> $HGRCPATH
   $ echo "dot.dot.prefixedname = `pwd`/prefixedname.py" >> $HGRCPATH
   $ hg help -k clone
   Topics:
   
    config     Configuration Files
    extensions Using Additional Features
    glossary   Glossary
    phases     Working with Phases
    subrepos   Subrepositories
    urls       URL Paths
   
   Commands:
   
    bookmarks create a new bookmark or list existing bookmarks
    clone     make a copy of an existing repository
    paths     show aliases for remote repositories
    update    update working directory (or switch revisions)
   
   Extensions:
   
    prefixedname matched against word "clone"
    relink       recreates hardlinks between repository clones
   
   Extension Commands:
   
    qclone clone main and patch repository at same time
 
 Test unfound topic
 
   $ hg help nonexistingtopicthatwillneverexisteverever
   abort: no such help topic: nonexistingtopicthatwillneverexisteverever
   (try "hg help --keyword nonexistingtopicthatwillneverexisteverever")
   [255]
 
 Test unfound keyword
 
   $ hg help --keyword nonexistingwordthatwillneverexisteverever
   abort: no matches
   (try "hg help" for a list of topics)
   [255]
 
 Test omit indicating for help
 
   $ cat > addverboseitems.py <<EOF
   > '''extension to test omit indicating.
   > 
   > This paragraph is never omitted (for extension)
   > 
   > .. container:: verbose
   > 
   >   This paragraph is omitted,
   >   if :hg:\`help\` is invoked without \`\`-v\`\` (for extension)
   > 
   > This paragraph is never omitted, too (for extension)
   > '''
   > 
   > from mercurial import help, commands
   > testtopic = """This paragraph is never omitted (for topic).
   > 
   > .. container:: verbose
   > 
   >   This paragraph is omitted,
   >   if :hg:\`help\` is invoked without \`\`-v\`\` (for topic)
   > 
   > This paragraph is never omitted, too (for topic)
   > """
   > def extsetup(ui):
   >     help.helptable.append((["topic-containing-verbose"],
   >                            "This is the topic to test omit indicating.",
   >                            lambda : testtopic))
   > EOF
   $ echo '[extensions]' >> $HGRCPATH
   $ echo "addverboseitems = `pwd`/addverboseitems.py" >> $HGRCPATH
   $ hg help addverboseitems
   addverboseitems extension - extension to test omit indicating.
   
   This paragraph is never omitted (for extension)
   
   This paragraph is never omitted, too (for extension)
   
   (some details hidden, use --verbose to show complete help)
   
   no commands defined
   $ hg help -v addverboseitems
   addverboseitems extension - extension to test omit indicating.
   
   This paragraph is never omitted (for extension)
   
   This paragraph is omitted, if "hg help" is invoked without "-v" (for
   extension)
   
   This paragraph is never omitted, too (for extension)
   
   no commands defined
   $ hg help topic-containing-verbose
   This is the topic to test omit indicating.
   """"""""""""""""""""""""""""""""""""""""""
   
       This paragraph is never omitted (for topic).
   
       This paragraph is never omitted, too (for topic)
   
   (some details hidden, use --verbose to show complete help)
   $ hg help -v topic-containing-verbose
   This is the topic to test omit indicating.
   """"""""""""""""""""""""""""""""""""""""""
   
       This paragraph is never omitted (for topic).
   
       This paragraph is omitted, if "hg help" is invoked without "-v" (for
       topic)
   
       This paragraph is never omitted, too (for topic)
 
 Test section lookup
 
   $ hg help revset.merge
       "merge()"
         Changeset is a merge changeset.
   
   $ hg help glossary.dag
       DAG
           The repository of changesets of a distributed version control system
           (DVCS) can be described as a directed acyclic graph (DAG), consisting
           of nodes and edges, where nodes correspond to changesets and edges
           imply a parent -> child relation. This graph can be visualized by
           graphical tools such as "hg log --graph". In Mercurial, the DAG is
           limited by the requirement for children to have at most two parents.
   
 
   $ hg help hgrc.paths
       "paths"
       -------
   
       Assigns symbolic names to repositories. The left side is the symbolic
       name, and the right gives the directory or URL that is the location of the
       repository. Default paths can be declared by setting the following
       entries.
   
       "default"
           Directory or URL to use when pulling if no source is specified.
           Default is set to repository from which the current repository was
           cloned.
   
       "default-push"
           Optional. Directory or URL to use when pushing if no destination is
           specified.
   
       Custom paths can be defined by assigning the path to a name that later can
       be used from the command line. Example:
   
         [paths]
         my_path = http://example.com/path
   
       To push to the path defined in "my_path" run the command:
   
         hg push my_path
   
   $ hg help glossary.mcguffin
   abort: help section not found
   [255]
 
   $ hg help glossary.mc.guffin
   abort: help section not found
   [255]
 
 Test dynamic list of merge tools only shows up once
   $ hg help merge-tools
   Merge Tools
   """""""""""
   
       To merge files Mercurial uses merge tools.
   
       A merge tool combines two different versions of a file into a merged file.
       Merge tools are given the two files and the greatest common ancestor of
       the two file versions, so they can determine the changes made on both
       branches.
   
       Merge tools are used both for "hg resolve", "hg merge", "hg update", "hg
       backout" and in several extensions.
   
       Usually, the merge tool tries to automatically reconcile the files by
       combining all non-overlapping changes that occurred separately in the two
       different evolutions of the same initial base file. Furthermore, some
       interactive merge programs make it easier to manually resolve conflicting
       merges, either in a graphical way, or by inserting some conflict markers.
       Mercurial does not include any interactive merge programs but relies on
       external tools for that.
   
       Available merge tools
       =====================
   
       External merge tools and their properties are configured in the merge-
       tools configuration section - see hgrc(5) - but they can often just be
       named by their executable.
   
       A merge tool is generally usable if its executable can be found on the
       system and if it can handle the merge. The executable is found if it is an
       absolute or relative executable path or the name of an application in the
       executable search path. The tool is assumed to be able to handle the merge
       if it can handle symlinks if the file is a symlink, if it can handle
       binary files if the file is binary, and if a GUI is available if the tool
       requires a GUI.
   
       There are some internal merge tools which can be used. The internal merge
       tools are:
   
       ":dump"
         Creates three versions of the files to merge, containing the contents of
         local, other and base. These files can then be used to perform a merge
         manually. If the file to be merged is named "a.txt", these files will
         accordingly be named "a.txt.local", "a.txt.other" and "a.txt.base" and
         they will be placed in the same directory as "a.txt".
   
       ":fail"
         Rather than attempting to merge files that were modified on both
         branches, it marks them as unresolved. The resolve command must be used
         to resolve these conflicts.
   
       ":local"
         Uses the local version of files as the merged version.
   
       ":merge"
         Uses the internal non-interactive simple merge algorithm for merging
         files. It will fail if there are any conflicts and leave markers in the
         partially merged file. Markers will have two sections, one for each side
         of merge.
   
       ":merge3"
         Uses the internal non-interactive simple merge algorithm for merging
         files. It will fail if there are any conflicts and leave markers in the
         partially merged file. Marker will have three sections, one from each
         side of the merge and one for the base content.
   
       ":other"
         Uses the other version of files as the merged version.
   
       ":prompt"
         Asks the user which of the local or the other version to keep as the
         merged version.
   
       ":tagmerge"
         Uses the internal tag merge algorithm (experimental).
   
       Internal tools are always available and do not require a GUI but will by
       default not handle symlinks or binary files.
   
       Choosing a merge tool
       =====================
   
       Mercurial uses these rules when deciding which merge tool to use:
   
       1. If a tool has been specified with the --tool option to merge or
          resolve, it is used.  If it is the name of a tool in the merge-tools
          configuration, its configuration is used. Otherwise the specified tool
          must be executable by the shell.
       2. If the "HGMERGE" environment variable is present, its value is used and
          must be executable by the shell.
       3. If the filename of the file to be merged matches any of the patterns in
          the merge-patterns configuration section, the first usable merge tool
          corresponding to a matching pattern is used. Here, binary capabilities
          of the merge tool are not considered.
       4. If ui.merge is set it will be considered next. If the value is not the
          name of a configured tool, the specified value is used and must be
          executable by the shell. Otherwise the named tool is used if it is
          usable.
       5. If any usable merge tools are present in the merge-tools configuration
          section, the one with the highest priority is used.
       6. If a program named "hgmerge" can be found on the system, it is used -
          but it will by default not be used for symlinks and binary files.
       7. If the file to be merged is not binary and is not a symlink, then
          internal ":merge" is used.
       8. The merge of the file fails and must be resolved before commit.
   
       Note:
          After selecting a merge program, Mercurial will by default attempt to
          merge the files using a simple merge algorithm first. Only if it
          doesn't succeed because of conflicting changes Mercurial will actually
          execute the merge program. Whether to use the simple merge algorithm
          first can be controlled by the premerge setting of the merge tool.
          Premerge is enabled by default unless the file is binary or a symlink.
   
       See the merge-tools and ui sections of hgrc(5) for details on the
       configuration of merge tools.
 
 Test usage of section marks in help documents
 
   $ cd "$TESTDIR"/../doc
   $ python check-seclevel.py
   $ cd $TESTTMP
 
 #if serve
 
 Test the help pages in hgweb.
 
 Dish up an empty repo; serve it cold.
 
   $ hg init "$TESTTMP/test"
   $ hg serve -R "$TESTTMP/test" -n test -p $HGPORT -d --pid-file=hg.pid
   $ cat hg.pid >> $DAEMON_PIDS
 
   $ "$TESTDIR/get-with-headers.py" 127.0.0.1:$HGPORT "help"
   200 Script output follows
   
   <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
   <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US">
   <head>
   <link rel="icon" href="/static/hgicon.png" type="image/png" />
   <meta name="robots" content="index, nofollow" />
   <link rel="stylesheet" href="/static/style-paper.css" type="text/css" />
   <script type="text/javascript" src="/static/mercurial.js"></script>
   
   <title>Help: Index</title>
   </head>
   <body>
   
   <div class="container">
   <div class="menu">
   <div class="logo">
   <a href="http://mercurial.selenic.com/">
   <img src="/static/hglogo.png" alt="mercurial" /></a>
   </div>
   <ul>
   <li><a href="/shortlog">log</a></li>
   <li><a href="/graph">graph</a></li>
   <li><a href="/tags">tags</a></li>
   <li><a href="/bookmarks">bookmarks</a></li>
   <li><a href="/branches">branches</a></li>
   </ul>
   <ul>
   <li class="active">help</li>
   </ul>
   </div>
   
   <div class="main">
   <h2 class="breadcrumb"><a href="/">Mercurial</a> </h2>
   <form class="search" action="/log">
   
   <p><input name="rev" id="search1" type="text" size="30" /></p>
   <div id="hint">Find changesets by keywords (author, files, the commit message), revision
   number or hash, or <a href="/help/revsets">revset expression</a>.</div>
   </form>
   <table class="bigtable">
   <tr><td colspan="2"><h2><a name="main" href="#topics">Topics</a></h2></td></tr>
   
   <tr><td>
   <a href="/help/config">
   config
   </a>
   </td><td>
   Configuration Files
   </td></tr>
   <tr><td>
   <a href="/help/dates">
   dates
   </a>
   </td><td>
   Date Formats
   </td></tr>
   <tr><td>
   <a href="/help/diffs">
   diffs
   </a>
   </td><td>
   Diff Formats
   </td></tr>
   <tr><td>
   <a href="/help/environment">
   environment
   </a>
   </td><td>
   Environment Variables
   </td></tr>
   <tr><td>
   <a href="/help/extensions">
   extensions
   </a>
   </td><td>
   Using Additional Features
   </td></tr>
   <tr><td>
   <a href="/help/filesets">
   filesets
   </a>
   </td><td>
   Specifying File Sets
   </td></tr>
   <tr><td>
   <a href="/help/glossary">
   glossary
   </a>
   </td><td>
   Glossary
   </td></tr>
   <tr><td>
   <a href="/help/hgignore">
   hgignore
   </a>
   </td><td>
   Syntax for Mercurial Ignore Files
   </td></tr>
   <tr><td>
   <a href="/help/hgweb">
   hgweb
   </a>
   </td><td>
   Configuring hgweb
   </td></tr>
   <tr><td>
   <a href="/help/merge-tools">
   merge-tools
   </a>
   </td><td>
   Merge Tools
   </td></tr>
   <tr><td>
   <a href="/help/multirevs">
   multirevs
   </a>
   </td><td>
   Specifying Multiple Revisions
   </td></tr>
   <tr><td>
   <a href="/help/patterns">
   patterns
   </a>
   </td><td>
   File Name Patterns
   </td></tr>
   <tr><td>
   <a href="/help/phases">
   phases
   </a>
   </td><td>
   Working with Phases
   </td></tr>
   <tr><td>
   <a href="/help/revisions">
   revisions
   </a>
   </td><td>
   Specifying Single Revisions
   </td></tr>
   <tr><td>
   <a href="/help/revsets">
   revsets
   </a>
   </td><td>
   Specifying Revision Sets
   </td></tr>
   <tr><td>
   <a href="/help/subrepos">
   subrepos
   </a>
   </td><td>
   Subrepositories
   </td></tr>
   <tr><td>
   <a href="/help/templating">
   templating
   </a>
   </td><td>
   Template Usage
   </td></tr>
   <tr><td>
   <a href="/help/urls">
   urls
   </a>
   </td><td>
   URL Paths
   </td></tr>
   <tr><td>
   <a href="/help/topic-containing-verbose">
   topic-containing-verbose
   </a>
   </td><td>
   This is the topic to test omit indicating.
   </td></tr>
   
   <tr><td colspan="2"><h2><a name="main" href="#main">Main Commands</a></h2></td></tr>
   
   <tr><td>
   <a href="/help/add">
   add
   </a>
   </td><td>
   add the specified files on the next commit
   </td></tr>
   <tr><td>
   <a href="/help/annotate">
   annotate
   </a>
   </td><td>
   show changeset information by line for each file
   </td></tr>
   <tr><td>
   <a href="/help/clone">
   clone
   </a>
   </td><td>
   make a copy of an existing repository
   </td></tr>
   <tr><td>
   <a href="/help/commit">
   commit
   </a>
   </td><td>
   commit the specified files or all outstanding changes
   </td></tr>
   <tr><td>
   <a href="/help/diff">
   diff
   </a>
   </td><td>
   diff repository (or selected files)
   </td></tr>
   <tr><td>
   <a href="/help/export">
   export
   </a>
   </td><td>
   dump the header and diffs for one or more changesets
   </td></tr>
   <tr><td>
   <a href="/help/forget">
   forget
   </a>
   </td><td>
   forget the specified files on the next commit
   </td></tr>
   <tr><td>
   <a href="/help/init">
   init
   </a>
   </td><td>
   create a new repository in the given directory
   </td></tr>
   <tr><td>
   <a href="/help/log">
   log
   </a>
   </td><td>
   show revision history of entire repository or files
   </td></tr>
   <tr><td>
   <a href="/help/merge">
   merge
   </a>
   </td><td>
   merge another revision into working directory
   </td></tr>
   <tr><td>
   <a href="/help/pull">
   pull
   </a>
   </td><td>
   pull changes from the specified source
   </td></tr>
   <tr><td>
   <a href="/help/push">
   push
   </a>
   </td><td>
   push changes to the specified destination
   </td></tr>
   <tr><td>
   <a href="/help/remove">
   remove
   </a>
   </td><td>
   remove the specified files on the next commit
   </td></tr>
   <tr><td>
   <a href="/help/serve">
   serve
   </a>
   </td><td>
   start stand-alone webserver
   </td></tr>
   <tr><td>
   <a href="/help/status">
   status
   </a>
   </td><td>
   show changed files in the working directory
   </td></tr>
   <tr><td>
   <a href="/help/summary">
   summary
   </a>
   </td><td>
   summarize working directory state
   </td></tr>
   <tr><td>
   <a href="/help/update">
   update
   </a>
   </td><td>
   update working directory (or switch revisions)
   </td></tr>
   
   <tr><td colspan="2"><h2><a name="other" href="#other">Other Commands</a></h2></td></tr>
   
   <tr><td>
   <a href="/help/addremove">
   addremove
   </a>
   </td><td>
   add all new files, delete all missing files
   </td></tr>
   <tr><td>
   <a href="/help/archive">
   archive
   </a>
   </td><td>
   create an unversioned archive of a repository revision
   </td></tr>
   <tr><td>
   <a href="/help/backout">
   backout
   </a>
   </td><td>
   reverse effect of earlier changeset
   </td></tr>
   <tr><td>
   <a href="/help/bisect">
   bisect
   </a>
   </td><td>
   subdivision search of changesets
   </td></tr>
   <tr><td>
   <a href="/help/bookmarks">
   bookmarks
   </a>
   </td><td>
   create a new bookmark or list existing bookmarks
   </td></tr>
   <tr><td>
   <a href="/help/branch">
   branch
   </a>
   </td><td>
   set or show the current branch name
   </td></tr>
   <tr><td>
   <a href="/help/branches">
   branches
   </a>
   </td><td>
   list repository named branches
   </td></tr>
   <tr><td>
   <a href="/help/bundle">
   bundle
   </a>
   </td><td>
   create a changegroup file
   </td></tr>
   <tr><td>
   <a href="/help/cat">
   cat
   </a>
   </td><td>
   output the current or given revision of files
   </td></tr>
   <tr><td>
   <a href="/help/config">
   config
   </a>
   </td><td>
   show combined config settings from all hgrc files
   </td></tr>
   <tr><td>
   <a href="/help/copy">
   copy
   </a>
   </td><td>
   mark files as copied for the next commit
   </td></tr>
   <tr><td>
   <a href="/help/files">
   files
   </a>
   </td><td>
   list tracked files
   </td></tr>
   <tr><td>
   <a href="/help/graft">
   graft
   </a>
   </td><td>
   copy changes from other branches onto the current branch
   </td></tr>
   <tr><td>
   <a href="/help/grep">
   grep
   </a>
   </td><td>
   search for a pattern in specified files and revisions
   </td></tr>
   <tr><td>
   <a href="/help/heads">
   heads
   </a>
   </td><td>
   show branch heads
   </td></tr>
   <tr><td>
   <a href="/help/help">
   help
   </a>
   </td><td>
   show help for a given topic or a help overview
   </td></tr>
   <tr><td>
   <a href="/help/identify">
   identify
   </a>
   </td><td>
   identify the working copy or specified revision
   </td></tr>
   <tr><td>
   <a href="/help/import">
   import
   </a>
   </td><td>
   import an ordered set of patches
   </td></tr>
   <tr><td>
   <a href="/help/incoming">
   incoming
   </a>
   </td><td>
   show new changesets found in source
   </td></tr>
   <tr><td>
   <a href="/help/manifest">
   manifest
   </a>
   </td><td>
   output the current or given revision of the project manifest
   </td></tr>
   <tr><td>
   <a href="/help/nohelp">
   nohelp
   </a>
   </td><td>
   (no help text available)
   </td></tr>
   <tr><td>
   <a href="/help/outgoing">
   outgoing
   </a>
   </td><td>
   show changesets not found in the destination
   </td></tr>
   <tr><td>
   <a href="/help/paths">
   paths
   </a>
   </td><td>
   show aliases for remote repositories
   </td></tr>
   <tr><td>
   <a href="/help/phase">
   phase
   </a>
   </td><td>
   set or show the current phase name
   </td></tr>
   <tr><td>
   <a href="/help/recover">
   recover
   </a>
   </td><td>
   roll back an interrupted transaction
   </td></tr>
   <tr><td>
   <a href="/help/rename">
   rename
   </a>
   </td><td>
   rename files; equivalent of copy + remove
   </td></tr>
   <tr><td>
   <a href="/help/resolve">
   resolve
   </a>
   </td><td>
   redo merges or set/view the merge status of files
   </td></tr>
   <tr><td>
   <a href="/help/revert">
   revert
   </a>
   </td><td>
   restore files to their checkout state
   </td></tr>
   <tr><td>
   <a href="/help/root">
   root
   </a>
   </td><td>
   print the root (top) of the current working directory
   </td></tr>
   <tr><td>
   <a href="/help/tag">
   tag
   </a>
   </td><td>
   add one or more tags for the current or given revision
   </td></tr>
   <tr><td>
   <a href="/help/tags">
   tags
   </a>
   </td><td>
   list repository tags
   </td></tr>
   <tr><td>
   <a href="/help/unbundle">
   unbundle
   </a>
   </td><td>
   apply one or more changegroup files
   </td></tr>
   <tr><td>
   <a href="/help/verify">
   verify
   </a>
   </td><td>
   verify the integrity of the repository
   </td></tr>
   <tr><td>
   <a href="/help/version">
   version
   </a>
   </td><td>
   output version and copyright information
   </td></tr>
   </table>
   </div>
   </div>
   
   <script type="text/javascript">process_dates()</script>
   
   
   </body>
   </html>
   
 
   $ "$TESTDIR/get-with-headers.py" 127.0.0.1:$HGPORT "help/add"
   200 Script output follows
   
   <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
   <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US">
   <head>
   <link rel="icon" href="/static/hgicon.png" type="image/png" />
   <meta name="robots" content="index, nofollow" />
   <link rel="stylesheet" href="/static/style-paper.css" type="text/css" />
   <script type="text/javascript" src="/static/mercurial.js"></script>
   
   <title>Help: add</title>
   </head>
   <body>
   
   <div class="container">
   <div class="menu">
   <div class="logo">
   <a href="http://mercurial.selenic.com/">
   <img src="/static/hglogo.png" alt="mercurial" /></a>
   </div>
   <ul>
   <li><a href="/shortlog">log</a></li>
   <li><a href="/graph">graph</a></li>
   <li><a href="/tags">tags</a></li>
   <li><a href="/bookmarks">bookmarks</a></li>
   <li><a href="/branches">branches</a></li>
   </ul>
   <ul>
    <li class="active"><a href="/help">help</a></li>
   </ul>
   </div>
   
   <div class="main">
   <h2 class="breadcrumb"><a href="/">Mercurial</a> </h2>
   <h3>Help: add</h3>
   
   <form class="search" action="/log">
   
   <p><input name="rev" id="search1" type="text" size="30" /></p>
   <div id="hint">Find changesets by keywords (author, files, the commit message), revision
   number or hash, or <a href="/help/revsets">revset expression</a>.</div>
   </form>
   <div id="doc">
   <p>
   hg add [OPTION]... [FILE]...
   </p>
   <p>
   add the specified files on the next commit
   </p>
   <p>
   Schedule files to be version controlled and added to the
   repository.
   </p>
   <p>
   The files will be added to the repository at the next commit. To
   undo an add before that, see &quot;hg forget&quot;.
   </p>
   <p>
   If no names are given, add all files to the repository.
   </p>
   <p>
   An example showing how new (unknown) files are added
   automatically by &quot;hg add&quot;:
   </p>
   <pre>
   \$ ls (re)
   foo.c
   \$ hg status (re)
   ? foo.c
   \$ hg add (re)
   adding foo.c
   \$ hg status (re)
   A foo.c
   </pre>
   <p>
   Returns 0 if all files are successfully added.
   </p>
   <p>
   options ([+] can be repeated):
   </p>
   <table>
   <tr><td>-I</td>
   <td>--include PATTERN [+]</td>
   <td>include names matching the given patterns</td></tr>
   <tr><td>-X</td>
   <td>--exclude PATTERN [+]</td>
   <td>exclude names matching the given patterns</td></tr>
   <tr><td>-S</td>
   <td>--subrepos</td>
   <td>recurse into subrepositories</td></tr>
   <tr><td>-n</td>
   <td>--dry-run</td>
   <td>do not perform actions, just print output</td></tr>
   </table>
   <p>
   global options ([+] can be repeated):
   </p>
   <table>
   <tr><td>-R</td>
   <td>--repository REPO</td>
   <td>repository root directory or name of overlay bundle file</td></tr>
   <tr><td></td>
   <td>--cwd DIR</td>
   <td>change working directory</td></tr>
   <tr><td>-y</td>
   <td>--noninteractive</td>
   <td>do not prompt, automatically pick the first choice for all prompts</td></tr>
   <tr><td>-q</td>
   <td>--quiet</td>
   <td>suppress output</td></tr>
   <tr><td>-v</td>
   <td>--verbose</td>
   <td>enable additional output</td></tr>
   <tr><td></td>
   <td>--config CONFIG [+]</td>
   <td>set/override config option (use 'section.name=value')</td></tr>
   <tr><td></td>
   <td>--debug</td>
   <td>enable debugging output</td></tr>
   <tr><td></td>
   <td>--debugger</td>
   <td>start debugger</td></tr>
   <tr><td></td>
   <td>--encoding ENCODE</td>
   <td>set the charset encoding (default: ascii)</td></tr>
   <tr><td></td>
   <td>--encodingmode MODE</td>
   <td>set the charset encoding mode (default: strict)</td></tr>
   <tr><td></td>
   <td>--traceback</td>
   <td>always print a traceback on exception</td></tr>
   <tr><td></td>
   <td>--time</td>
   <td>time how long the command takes</td></tr>
   <tr><td></td>
   <td>--profile</td>
   <td>print command execution profile</td></tr>
   <tr><td></td>
   <td>--version</td>
   <td>output version information and exit</td></tr>
   <tr><td>-h</td>
   <td>--help</td>
   <td>display help and exit</td></tr>
   <tr><td></td>
   <td>--hidden</td>
   <td>consider hidden changesets</td></tr>
   </table>
   
   </div>
   </div>
   </div>
   
   <script type="text/javascript">process_dates()</script>
   
   
   </body>
   </html>
   
 
   $ "$TESTDIR/get-with-headers.py" 127.0.0.1:$HGPORT "help/remove"
   200 Script output follows
   
   <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
   <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US">
   <head>
   <link rel="icon" href="/static/hgicon.png" type="image/png" />
   <meta name="robots" content="index, nofollow" />
   <link rel="stylesheet" href="/static/style-paper.css" type="text/css" />
   <script type="text/javascript" src="/static/mercurial.js"></script>
   
   <title>Help: remove</title>
   </head>
   <body>
   
   <div class="container">
   <div class="menu">
   <div class="logo">
   <a href="http://mercurial.selenic.com/">
   <img src="/static/hglogo.png" alt="mercurial" /></a>
   </div>
   <ul>
   <li><a href="/shortlog">log</a></li>
   <li><a href="/graph">graph</a></li>
   <li><a href="/tags">tags</a></li>
   <li><a href="/bookmarks">bookmarks</a></li>
   <li><a href="/branches">branches</a></li>
   </ul>
   <ul>
    <li class="active"><a href="/help">help</a></li>
   </ul>
   </div>
   
   <div class="main">
   <h2 class="breadcrumb"><a href="/">Mercurial</a> </h2>
   <h3>Help: remove</h3>
   
   <form class="search" action="/log">
   
   <p><input name="rev" id="search1" type="text" size="30" /></p>
   <div id="hint">Find changesets by keywords (author, files, the commit message), revision
   number or hash, or <a href="/help/revsets">revset expression</a>.</div>
   </form>
   <div id="doc">
   <p>
   hg remove [OPTION]... FILE...
   </p>
   <p>
   aliases: rm
   </p>
   <p>
   remove the specified files on the next commit
   </p>
   <p>
   Schedule the indicated files for removal from the current branch.
   </p>
   <p>
   This command schedules the files to be removed at the next commit.
   To undo a remove before that, see &quot;hg revert&quot;. To undo added
   files, see &quot;hg forget&quot;.
   </p>
   <p>
   -A/--after can be used to remove only files that have already
   been deleted, -f/--force can be used to force deletion, and -Af
   can be used to remove files from the next revision without
   deleting them from the working directory.
   </p>
   <p>
   The following table details the behavior of remove for different
   file states (columns) and option combinations (rows). The file
   states are Added [A], Clean [C], Modified [M] and Missing [!]
   (as reported by &quot;hg status&quot;). The actions are Warn, Remove
   (from branch) and Delete (from disk):
   </p>
   <table>
   <tr><td>opt/state</td>
   <td>A</td>
   <td>C</td>
   <td>M</td>
   <td>!</td></tr>
   <tr><td>none</td>
   <td>W</td>
   <td>RD</td>
   <td>W</td>
   <td>R</td></tr>
   <tr><td>-f</td>
   <td>R</td>
   <td>RD</td>
   <td>RD</td>
   <td>R</td></tr>
   <tr><td>-A</td>
   <td>W</td>
   <td>W</td>
   <td>W</td>
   <td>R</td></tr>
   <tr><td>-Af</td>
   <td>R</td>
   <td>R</td>
   <td>R</td>
   <td>R</td></tr>
   </table>
   <p>
   Note that remove never deletes files in Added [A] state from the
   working directory, not even if option --force is specified.
   </p>
   <p>
   Returns 0 on success, 1 if any warnings encountered.
   </p>
   <p>
   options ([+] can be repeated):
   </p>
   <table>
   <tr><td>-A</td>
   <td>--after</td>
   <td>record delete for missing files</td></tr>
   <tr><td>-f</td>
   <td>--force</td>
   <td>remove (and delete) file even if added or modified</td></tr>
   <tr><td>-S</td>
   <td>--subrepos</td>
   <td>recurse into subrepositories</td></tr>
   <tr><td>-I</td>
   <td>--include PATTERN [+]</td>
   <td>include names matching the given patterns</td></tr>
   <tr><td>-X</td>
   <td>--exclude PATTERN [+]</td>
   <td>exclude names matching the given patterns</td></tr>
   </table>
   <p>
   global options ([+] can be repeated):
   </p>
   <table>
   <tr><td>-R</td>
   <td>--repository REPO</td>
   <td>repository root directory or name of overlay bundle file</td></tr>
   <tr><td></td>
   <td>--cwd DIR</td>
   <td>change working directory</td></tr>
   <tr><td>-y</td>
   <td>--noninteractive</td>
   <td>do not prompt, automatically pick the first choice for all prompts</td></tr>
   <tr><td>-q</td>
   <td>--quiet</td>
   <td>suppress output</td></tr>
   <tr><td>-v</td>
   <td>--verbose</td>
   <td>enable additional output</td></tr>
   <tr><td></td>
   <td>--config CONFIG [+]</td>
   <td>set/override config option (use 'section.name=value')</td></tr>
   <tr><td></td>
   <td>--debug</td>
   <td>enable debugging output</td></tr>
   <tr><td></td>
   <td>--debugger</td>
   <td>start debugger</td></tr>
   <tr><td></td>
   <td>--encoding ENCODE</td>
   <td>set the charset encoding (default: ascii)</td></tr>
   <tr><td></td>
   <td>--encodingmode MODE</td>
   <td>set the charset encoding mode (default: strict)</td></tr>
   <tr><td></td>
   <td>--traceback</td>
   <td>always print a traceback on exception</td></tr>
   <tr><td></td>
   <td>--time</td>
   <td>time how long the command takes</td></tr>
   <tr><td></td>
   <td>--profile</td>
   <td>print command execution profile</td></tr>
   <tr><td></td>
   <td>--version</td>
   <td>output version information and exit</td></tr>
   <tr><td>-h</td>
   <td>--help</td>
   <td>display help and exit</td></tr>
   <tr><td></td>
   <td>--hidden</td>
   <td>consider hidden changesets</td></tr>
   </table>
   
   </div>
   </div>
   </div>
   
   <script type="text/javascript">process_dates()</script>
   
   
   </body>
   </html>
   
 
   $ "$TESTDIR/get-with-headers.py" 127.0.0.1:$HGPORT "help/revisions"
   200 Script output follows
   
   <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
   <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US">
   <head>
   <link rel="icon" href="/static/hgicon.png" type="image/png" />
   <meta name="robots" content="index, nofollow" />
   <link rel="stylesheet" href="/static/style-paper.css" type="text/css" />
   <script type="text/javascript" src="/static/mercurial.js"></script>
   
   <title>Help: revisions</title>
   </head>
   <body>
   
   <div class="container">
   <div class="menu">
   <div class="logo">
   <a href="http://mercurial.selenic.com/">
   <img src="/static/hglogo.png" alt="mercurial" /></a>
   </div>
   <ul>
   <li><a href="/shortlog">log</a></li>
   <li><a href="/graph">graph</a></li>
   <li><a href="/tags">tags</a></li>
   <li><a href="/bookmarks">bookmarks</a></li>
   <li><a href="/branches">branches</a></li>
   </ul>
   <ul>
    <li class="active"><a href="/help">help</a></li>
   </ul>
   </div>
   
   <div class="main">
   <h2 class="breadcrumb"><a href="/">Mercurial</a> </h2>
   <h3>Help: revisions</h3>
   
   <form class="search" action="/log">
   
   <p><input name="rev" id="search1" type="text" size="30" /></p>
   <div id="hint">Find changesets by keywords (author, files, the commit message), revision
   number or hash, or <a href="/help/revsets">revset expression</a>.</div>
   </form>
   <div id="doc">
   <h1>Specifying Single Revisions</h1>
   <p>
   Mercurial supports several ways to specify individual revisions.
   </p>
   <p>
   A plain integer is treated as a revision number. Negative integers are
   treated as sequential offsets from the tip, with -1 denoting the tip,
   -2 denoting the revision prior to the tip, and so forth.
   </p>
   <p>
   A 40-digit hexadecimal string is treated as a unique revision
   identifier.
   </p>
   <p>
   A hexadecimal string less than 40 characters long is treated as a
   unique revision identifier and is referred to as a short-form
   identifier. A short-form identifier is only valid if it is the prefix
   of exactly one full-length identifier.
   </p>
   <p>
   Any other string is treated as a bookmark, tag, or branch name. A
   bookmark is a movable pointer to a revision. A tag is a permanent name
   associated with a revision. A branch name denotes the tipmost open branch head
   of that branch - or if they are all closed, the tipmost closed head of the
   branch. Bookmark, tag, and branch names must not contain the &quot;:&quot; character.
   </p>
   <p>
   The reserved name &quot;tip&quot; always identifies the most recent revision.
   </p>
   <p>
   The reserved name &quot;null&quot; indicates the null revision. This is the
   revision of an empty repository, and the parent of revision 0.
   </p>
   <p>
   The reserved name &quot;.&quot; indicates the working directory parent. If no
   working directory is checked out, it is equivalent to null. If an
   uncommitted merge is in progress, &quot;.&quot; is the revision of the first
   parent.
   </p>
   
   </div>
   </div>
   </div>
   
   <script type="text/javascript">process_dates()</script>
   
   
   </body>
   </html>
   
 
   $ "$TESTDIR/killdaemons.py" $DAEMON_PIDS
 
 #endif