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# common.py - common code for the convert extension
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#
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# Copyright 2005-2009 Matt Mackall <mpm@selenic.com> and others
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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import base64, errno
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import os
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import cPickle as pickle
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from mercurial import util
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from mercurial.i18n import _
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propertycache = util.propertycache
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def encodeargs(args):
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def encodearg(s):
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lines = base64.encodestring(s)
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lines = [l.splitlines()[0] for l in lines]
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return ''.join(lines)
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s = pickle.dumps(args)
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return encodearg(s)
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def decodeargs(s):
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s = base64.decodestring(s)
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return pickle.loads(s)
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class MissingTool(Exception):
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pass
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def checktool(exe, name=None, abort=True):
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name = name or exe
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if not util.findexe(exe):
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exc = abort and util.Abort or MissingTool
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raise exc(_('cannot find required "%s" tool') % name)
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class NoRepo(Exception):
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pass
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SKIPREV = 'SKIP'
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class commit(object):
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def __init__(self, author, date, desc, parents, branch=None, rev=None,
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extra={}, sortkey=None):
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self.author = author or 'unknown'
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self.date = date or '0 0'
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self.desc = desc
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self.parents = parents
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self.branch = branch
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self.rev = rev
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self.extra = extra
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self.sortkey = sortkey
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class converter_source(object):
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"""Conversion source interface"""
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def __init__(self, ui, path=None, rev=None):
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"""Initialize conversion source (or raise NoRepo("message")
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exception if path is not a valid repository)"""
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self.ui = ui
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self.path = path
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self.rev = rev
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self.encoding = 'utf-8'
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def before(self):
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pass
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def after(self):
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pass
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def setrevmap(self, revmap):
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"""set the map of already-converted revisions"""
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pass
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def getheads(self):
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"""Return a list of this repository's heads"""
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raise NotImplementedError()
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def getfile(self, name, rev):
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"""Return a pair (data, mode) where data is the file content
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as a string and mode one of '', 'x' or 'l'. rev is the
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identifier returned by a previous call to getchanges(). Raise
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IOError to indicate that name was deleted in rev.
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"""
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raise NotImplementedError()
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def getchanges(self, version):
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"""Returns a tuple of (files, copies).
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files is a sorted list of (filename, id) tuples for all files
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changed between version and its first parent returned by
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getcommit(). id is the source revision id of the file.
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copies is a dictionary of dest: source
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"""
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raise NotImplementedError()
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def getcommit(self, version):
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"""Return the commit object for version"""
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raise NotImplementedError()
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def gettags(self):
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"""Return the tags as a dictionary of name: revision
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Tag names must be UTF-8 strings.
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"""
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raise NotImplementedError()
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def recode(self, s, encoding=None):
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if not encoding:
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encoding = self.encoding or 'utf-8'
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if isinstance(s, unicode):
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return s.encode("utf-8")
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try:
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return s.decode(encoding).encode("utf-8")
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except:
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try:
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return s.decode("latin-1").encode("utf-8")
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except:
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return s.decode(encoding, "replace").encode("utf-8")
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def getchangedfiles(self, rev, i):
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"""Return the files changed by rev compared to parent[i].
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i is an index selecting one of the parents of rev. The return
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value should be the list of files that are different in rev and
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this parent.
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If rev has no parents, i is None.
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This function is only needed to support --filemap
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"""
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raise NotImplementedError()
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def converted(self, rev, sinkrev):
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'''Notify the source that a revision has been converted.'''
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pass
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def hasnativeorder(self):
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"""Return true if this source has a meaningful, native revision
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order. For instance, Mercurial revisions are store sequentially
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while there is no such global ordering with Darcs.
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"""
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return False
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def lookuprev(self, rev):
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"""If rev is a meaningful revision reference in source, return
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the referenced identifier in the same format used by getcommit().
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return None otherwise.
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"""
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return None
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def getbookmarks(self):
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"""Return the bookmarks as a dictionary of name: revision
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Bookmark names are to be UTF-8 strings.
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"""
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return {}
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class converter_sink(object):
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"""Conversion sink (target) interface"""
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def __init__(self, ui, path):
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"""Initialize conversion sink (or raise NoRepo("message")
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exception if path is not a valid repository)
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created is a list of paths to remove if a fatal error occurs
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later"""
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self.ui = ui
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self.path = path
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self.created = []
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def getheads(self):
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"""Return a list of this repository's heads"""
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raise NotImplementedError()
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def revmapfile(self):
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"""Path to a file that will contain lines
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source_rev_id sink_rev_id
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mapping equivalent revision identifiers for each system."""
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raise NotImplementedError()
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def authorfile(self):
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"""Path to a file that will contain lines
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srcauthor=dstauthor
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mapping equivalent authors identifiers for each system."""
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return None
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def putcommit(self, files, copies, parents, commit, source, revmap):
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"""Create a revision with all changed files listed in 'files'
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and having listed parents. 'commit' is a commit object
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containing at a minimum the author, date, and message for this
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changeset. 'files' is a list of (path, version) tuples,
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'copies' is a dictionary mapping destinations to sources,
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'source' is the source repository, and 'revmap' is a mapfile
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of source revisions to converted revisions. Only getfile() and
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lookuprev() should be called on 'source'.
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Note that the sink repository is not told to update itself to
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a particular revision (or even what that revision would be)
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before it receives the file data.
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"""
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raise NotImplementedError()
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def puttags(self, tags):
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"""Put tags into sink.
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tags: {tagname: sink_rev_id, ...} where tagname is an UTF-8 string.
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Return a pair (tag_revision, tag_parent_revision), or (None, None)
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if nothing was changed.
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"""
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raise NotImplementedError()
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def setbranch(self, branch, pbranches):
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"""Set the current branch name. Called before the first putcommit
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on the branch.
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branch: branch name for subsequent commits
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pbranches: (converted parent revision, parent branch) tuples"""
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pass
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def setfilemapmode(self, active):
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"""Tell the destination that we're using a filemap
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Some converter_sources (svn in particular) can claim that a file
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was changed in a revision, even if there was no change. This method
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tells the destination that we're using a filemap and that it should
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filter empty revisions.
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"""
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pass
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def before(self):
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pass
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def after(self):
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pass
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def putbookmarks(self, bookmarks):
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"""Put bookmarks into sink.
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bookmarks: {bookmarkname: sink_rev_id, ...}
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where bookmarkname is an UTF-8 string.
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"""
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pass
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class commandline(object):
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def __init__(self, ui, command):
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self.ui = ui
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self.command = command
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def prerun(self):
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pass
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def postrun(self):
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pass
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def _cmdline(self, cmd, closestdin, *args, **kwargs):
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cmdline = [self.command, cmd] + list(args)
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for k, v in kwargs.iteritems():
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if len(k) == 1:
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cmdline.append('-' + k)
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else:
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cmdline.append('--' + k.replace('_', '-'))
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try:
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if len(k) == 1:
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cmdline.append('' + v)
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else:
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cmdline[-1] += '=' + v
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except TypeError:
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pass
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cmdline = [util.shellquote(arg) for arg in cmdline]
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if not self.ui.debugflag:
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cmdline += ['2>', util.nulldev]
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if closestdin:
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cmdline += ['<', util.nulldev]
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cmdline = ' '.join(cmdline)
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return cmdline
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def _run(self, cmd, *args, **kwargs):
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return self._dorun(util.popen, cmd, True, *args, **kwargs)
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def _run2(self, cmd, *args, **kwargs):
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return self._dorun(util.popen2, cmd, False, *args, **kwargs)
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def _dorun(self, openfunc, cmd, closestdin, *args, **kwargs):
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cmdline = self._cmdline(cmd, closestdin, *args, **kwargs)
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self.ui.debug('running: %s\n' % (cmdline,))
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self.prerun()
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try:
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return openfunc(cmdline)
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finally:
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self.postrun()
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def run(self, cmd, *args, **kwargs):
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fp = self._run(cmd, *args, **kwargs)
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output = fp.read()
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self.ui.debug(output)
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return output, fp.close()
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def runlines(self, cmd, *args, **kwargs):
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fp = self._run(cmd, *args, **kwargs)
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output = fp.readlines()
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self.ui.debug(''.join(output))
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return output, fp.close()
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def checkexit(self, status, output=''):
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if status:
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if output:
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self.ui.warn(_('%s error:\n') % self.command)
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self.ui.warn(output)
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msg = util.explainexit(status)[0]
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raise util.Abort('%s %s' % (self.command, msg))
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def run0(self, cmd, *args, **kwargs):
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output, status = self.run(cmd, *args, **kwargs)
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self.checkexit(status, output)
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return output
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def runlines0(self, cmd, *args, **kwargs):
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output, status = self.runlines(cmd, *args, **kwargs)
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self.checkexit(status, ''.join(output))
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return output
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@propertycache
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def argmax(self):
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# POSIX requires at least 4096 bytes for ARG_MAX
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argmax = 4096
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try:
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argmax = os.sysconf("SC_ARG_MAX")
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except:
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pass
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# Windows shells impose their own limits on command line length,
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# down to 2047 bytes for cmd.exe under Windows NT/2k and 2500 bytes
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# for older 4nt.exe. See http://support.microsoft.com/kb/830473 for
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# details about cmd.exe limitations.
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# Since ARG_MAX is for command line _and_ environment, lower our limit
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# (and make happy Windows shells while doing this).
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return argmax // 2 - 1
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def limit_arglist(self, arglist, cmd, closestdin, *args, **kwargs):
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cmdlen = len(self._cmdline(cmd, closestdin, *args, **kwargs))
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limit = self.argmax - cmdlen
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bytes = 0
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fl = []
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for fn in arglist:
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b = len(fn) + 3
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if bytes + b < limit or len(fl) == 0:
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fl.append(fn)
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bytes += b
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else:
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yield fl
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fl = [fn]
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bytes = b
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if fl:
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yield fl
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def xargs(self, arglist, cmd, *args, **kwargs):
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for l in self.limit_arglist(arglist, cmd, True, *args, **kwargs):
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self.run0(cmd, *(list(args) + l), **kwargs)
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class mapfile(dict):
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def __init__(self, ui, path):
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super(mapfile, self).__init__()
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self.ui = ui
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self.path = path
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self.fp = None
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self.order = []
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self._read()
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def _read(self):
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if not self.path:
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return
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try:
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fp = open(self.path, 'r')
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except IOError, err:
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if err.errno != errno.ENOENT:
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raise
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return
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for i, line in enumerate(fp):
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try:
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key, value = line.splitlines()[0].rstrip().rsplit(' ', 1)
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except ValueError:
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raise util.Abort(
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_('syntax error in %s(%d): key/value pair expected')
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% (self.path, i + 1))
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if key not in self:
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self.order.append(key)
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super(mapfile, self).__setitem__(key, value)
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fp.close()
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def __setitem__(self, key, value):
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if self.fp is None:
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try:
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self.fp = open(self.path, 'a')
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except IOError, err:
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raise util.Abort(_('could not open map file %r: %s') %
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(self.path, err.strerror))
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self.fp.write('%s %s\n' % (key, value))
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self.fp.flush()
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super(mapfile, self).__setitem__(key, value)
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def close(self):
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if self.fp:
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self.fp.close()
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self.fp = None
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