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# Copyright 2007 Bryan O'Sullivan <bos@serpentine.com>
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# Copyright 2007 Alexis S. L. Carvalho <alexis@cecm.usp.br>
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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, incorporated herein by reference.
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import shlex
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from mercurial.i18n import _
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from mercurial import util
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from common import SKIPREV, converter_source
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def rpairs(name):
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yield '.', name
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e = len(name)
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while e != -1:
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yield name[:e], name[e+1:]
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e = name.rfind('/', 0, e)
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class filemapper(object):
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'''Map and filter filenames when importing.
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A name can be mapped to itself, a new name, or None (omit from new
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repository).'''
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def __init__(self, ui, path=None):
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self.ui = ui
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self.include = {}
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self.exclude = {}
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self.rename = {}
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if path:
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if self.parse(path):
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raise util.Abort(_('errors in filemap'))
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def parse(self, path):
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errs = 0
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def check(name, mapping, listname):
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if name in mapping:
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self.ui.warn(_('%s:%d: %r already in %s list\n') %
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(lex.infile, lex.lineno, name, listname))
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return 1
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return 0
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lex = shlex.shlex(open(path), path, True)
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lex.wordchars += '!@#$%^&*()-=+[]{}|;:,./<>?'
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cmd = lex.get_token()
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while cmd:
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if cmd == 'include':
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name = lex.get_token()
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errs += check(name, self.exclude, 'exclude')
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self.include[name] = name
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elif cmd == 'exclude':
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name = lex.get_token()
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errs += check(name, self.include, 'include')
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errs += check(name, self.rename, 'rename')
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self.exclude[name] = name
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elif cmd == 'rename':
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src = lex.get_token()
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dest = lex.get_token()
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errs += check(src, self.exclude, 'exclude')
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self.rename[src] = dest
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elif cmd == 'source':
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errs += self.parse(lex.get_token())
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else:
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self.ui.warn(_('%s:%d: unknown directive %r\n') %
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(lex.infile, lex.lineno, cmd))
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errs += 1
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cmd = lex.get_token()
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return errs
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def lookup(self, name, mapping):
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for pre, suf in rpairs(name):
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try:
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return mapping[pre], pre, suf
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except KeyError:
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pass
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return '', name, ''
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def __call__(self, name):
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if self.include:
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inc = self.lookup(name, self.include)[0]
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else:
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inc = name
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if self.exclude:
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exc = self.lookup(name, self.exclude)[0]
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else:
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exc = ''
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if not inc or exc:
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return None
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newpre, pre, suf = self.lookup(name, self.rename)
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if newpre:
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if newpre == '.':
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return suf
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if suf:
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return newpre + '/' + suf
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return newpre
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return name
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def active(self):
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return bool(self.include or self.exclude or self.rename)
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# This class does two additional things compared to a regular source:
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#
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# - Filter and rename files. This is mostly wrapped by the filemapper
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# class above. We hide the original filename in the revision that is
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# returned by getchanges to be able to find things later in getfile
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# and getmode.
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#
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# - Return only revisions that matter for the files we're interested in.
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# This involves rewriting the parents of the original revision to
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# create a graph that is restricted to those revisions.
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#
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# This set of revisions includes not only revisions that directly
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# touch files we're interested in, but also merges that merge two
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# or more interesting revisions.
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class filemap_source(converter_source):
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def __init__(self, ui, baseconverter, filemap):
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super(filemap_source, self).__init__(ui)
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self.base = baseconverter
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self.filemapper = filemapper(ui, filemap)
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self.commits = {}
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# if a revision rev has parent p in the original revision graph, then
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# rev will have parent self.parentmap[p] in the restricted graph.
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self.parentmap = {}
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# self.wantedancestors[rev] is the set of all ancestors of rev that
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# are in the restricted graph.
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self.wantedancestors = {}
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self.convertedorder = None
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self._rebuilt = False
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self.origparents = {}
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self.children = {}
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self.seenchildren = {}
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def before(self):
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self.base.before()
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def after(self):
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self.base.after()
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def setrevmap(self, revmap):
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# rebuild our state to make things restartable
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#
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# To avoid calling getcommit for every revision that has already
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# been converted, we rebuild only the parentmap, delaying the
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# rebuild of wantedancestors until we need it (i.e. until a
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# merge).
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#
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# We assume the order argument lists the revisions in
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# topological order, so that we can infer which revisions were
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# wanted by previous runs.
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self._rebuilt = not revmap
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seen = {SKIPREV: SKIPREV}
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dummyset = set()
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converted = []
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for rev in revmap.order:
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mapped = revmap[rev]
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wanted = mapped not in seen
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if wanted:
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seen[mapped] = rev
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self.parentmap[rev] = rev
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else:
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self.parentmap[rev] = seen[mapped]
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self.wantedancestors[rev] = dummyset
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arg = seen[mapped]
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if arg == SKIPREV:
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arg = None
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converted.append((rev, wanted, arg))
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self.convertedorder = converted
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return self.base.setrevmap(revmap)
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def rebuild(self):
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if self._rebuilt:
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return True
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self._rebuilt = True
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self.parentmap.clear()
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self.wantedancestors.clear()
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self.seenchildren.clear()
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for rev, wanted, arg in self.convertedorder:
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if rev not in self.origparents:
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self.origparents[rev] = self.getcommit(rev).parents
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if arg is not None:
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self.children[arg] = self.children.get(arg, 0) + 1
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for rev, wanted, arg in self.convertedorder:
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parents = self.origparents[rev]
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if wanted:
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self.mark_wanted(rev, parents)
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else:
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self.mark_not_wanted(rev, arg)
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self._discard(arg, *parents)
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return True
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def getheads(self):
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return self.base.getheads()
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def getcommit(self, rev):
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# We want to save a reference to the commit objects to be able
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# to rewrite their parents later on.
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c = self.commits[rev] = self.base.getcommit(rev)
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for p in c.parents:
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self.children[p] = self.children.get(p, 0) + 1
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return c
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def _discard(self, *revs):
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for r in revs:
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if r is None:
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continue
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self.seenchildren[r] = self.seenchildren.get(r, 0) + 1
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if self.seenchildren[r] == self.children[r]:
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del self.wantedancestors[r]
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del self.parentmap[r]
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del self.seenchildren[r]
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if self._rebuilt:
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del self.children[r]
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def wanted(self, rev, i):
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# Return True if we're directly interested in rev.
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#
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# i is an index selecting one of the parents of rev (if rev
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# has no parents, i is None). getchangedfiles will give us
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# the list of files that are different in rev and in the parent
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# indicated by i. If we're interested in any of these files,
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# we're interested in rev.
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try:
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files = self.base.getchangedfiles(rev, i)
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except NotImplementedError:
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raise util.Abort(_("source repository doesn't support --filemap"))
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for f in files:
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if self.filemapper(f):
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return True
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return False
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def mark_not_wanted(self, rev, p):
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# Mark rev as not interesting and update data structures.
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if p is None:
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# A root revision. Use SKIPREV to indicate that it doesn't
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# map to any revision in the restricted graph. Put SKIPREV
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# in the set of wanted ancestors to simplify code elsewhere
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self.parentmap[rev] = SKIPREV
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self.wantedancestors[rev] = set((SKIPREV,))
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return
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# Reuse the data from our parent.
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self.parentmap[rev] = self.parentmap[p]
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self.wantedancestors[rev] = self.wantedancestors[p]
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def mark_wanted(self, rev, parents):
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# Mark rev ss wanted and update data structures.
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# rev will be in the restricted graph, so children of rev in
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# the original graph should still have rev as a parent in the
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# restricted graph.
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self.parentmap[rev] = rev
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# The set of wanted ancestors of rev is the union of the sets
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# of wanted ancestors of its parents. Plus rev itself.
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wrev = set()
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for p in parents:
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wrev.update(self.wantedancestors[p])
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wrev.add(rev)
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self.wantedancestors[rev] = wrev
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def getchanges(self, rev):
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parents = self.commits[rev].parents
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if len(parents) > 1:
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self.rebuild()
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# To decide whether we're interested in rev we:
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#
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# - calculate what parents rev will have if it turns out we're
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# interested in it. If it's going to have more than 1 parent,
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# we're interested in it.
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#
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# - otherwise, we'll compare it with the single parent we found.
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# If any of the files we're interested in is different in the
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# the two revisions, we're interested in rev.
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# A parent p is interesting if its mapped version (self.parentmap[p]):
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# - is not SKIPREV
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# - is still not in the list of parents (we don't want duplicates)
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# - is not an ancestor of the mapped versions of the other parents
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mparents = []
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wp = None
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for i, p1 in enumerate(parents):
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mp1 = self.parentmap[p1]
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if mp1 == SKIPREV or mp1 in mparents:
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continue
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for p2 in parents:
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if p1 == p2 or mp1 == self.parentmap[p2]:
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continue
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if mp1 in self.wantedancestors[p2]:
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break
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else:
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mparents.append(mp1)
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wp = i
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if wp is None and parents:
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wp = 0
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self.origparents[rev] = parents
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if len(mparents) < 2 and not self.wanted(rev, wp):
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# We don't want this revision.
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# Update our state and tell the convert process to map this
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# revision to the same revision its parent as mapped to.
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p = None
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if parents:
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p = parents[wp]
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self.mark_not_wanted(rev, p)
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self.convertedorder.append((rev, False, p))
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self._discard(*parents)
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return self.parentmap[rev]
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# We want this revision.
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# Rewrite the parents of the commit object
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self.commits[rev].parents = mparents
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self.mark_wanted(rev, parents)
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self.convertedorder.append((rev, True, None))
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self._discard(*parents)
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# Get the real changes and do the filtering/mapping.
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# To be able to get the files later on in getfile and getmode,
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# we hide the original filename in the rev part of the return
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# value.
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changes, copies = self.base.getchanges(rev)
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newnames = {}
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files = []
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for f, r in changes:
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newf = self.filemapper(f)
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if newf:
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files.append((newf, (f, r)))
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newnames[f] = newf
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ncopies = {}
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for c in copies:
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newc = self.filemapper(c)
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if newc:
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newsource = self.filemapper(copies[c])
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if newsource:
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ncopies[newc] = newsource
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return files, ncopies
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def getfile(self, name, rev):
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realname, realrev = rev
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return self.base.getfile(realname, realrev)
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def getmode(self, name, rev):
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realname, realrev = rev
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return self.base.getmode(realname, realrev)
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def gettags(self):
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return self.base.gettags()
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