mercurial/bundlerepo.py
author Martin Geisler <mg@aragost.com>
Mon, 29 Nov 2010 16:17:05 +0100
changeset 13143 c2e55c21db27
parent 12962 ff083040a555
child 13274 57d433f632b7
permissions -rw-r--r--
archive: add support for progress extension
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# bundlerepo.py - repository class for viewing uncompressed bundles
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#
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# Copyright 2006, 2007 Benoit Boissinot <bboissin@gmail.com>
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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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"""Repository class for viewing uncompressed bundles.
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This provides a read-only repository interface to bundles as if they
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were part of the actual repository.
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"""
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from node import nullid
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from i18n import _
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import os, struct, tempfile, shutil
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import changegroup, util, mdiff, discovery
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import localrepo, changelog, manifest, filelog, revlog, error
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class bundlerevlog(revlog.revlog):
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    def __init__(self, opener, indexfile, bundle,
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                 linkmapper=None):
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        # How it works:
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        # to retrieve a revision, we need to know the offset of
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        # the revision in the bundle (an unbundle object).
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        #
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        # We store this offset in the index (start), to differentiate a
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        # rev in the bundle and from a rev in the revlog, we check
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        # len(index[r]). If the tuple is bigger than 7, it is a bundle
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        # (it is bigger since we store the node to which the delta is)
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        #
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        revlog.revlog.__init__(self, opener, indexfile)
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        self.bundle = bundle
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        self.basemap = {}
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        def chunkpositer():
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            while 1:
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                chunk = bundle.chunk()
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                if not chunk:
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                    break
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                pos = bundle.tell()
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                yield chunk, pos - len(chunk)
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        n = len(self)
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        prev = None
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        for chunk, start in chunkpositer():
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            size = len(chunk)
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            if size < 80:
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                raise util.Abort(_("invalid changegroup"))
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            start += 80
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            size -= 80
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            node, p1, p2, cs = struct.unpack("20s20s20s20s", chunk[:80])
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            if node in self.nodemap:
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                prev = node
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                continue
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            for p in (p1, p2):
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                if not p in self.nodemap:
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                    raise error.LookupError(p, self.indexfile,
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                                            _("unknown parent"))
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            if linkmapper is None:
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                link = n
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            else:
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                link = linkmapper(cs)
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            if not prev:
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                prev = p1
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            # start, size, full unc. size, base (unused), link, p1, p2, node
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            e = (revlog.offset_type(start, 0), size, -1, -1, link,
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                 self.rev(p1), self.rev(p2), node)
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            self.basemap[n] = prev
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            self.index.insert(-1, e)
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            self.nodemap[node] = n
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            prev = node
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            n += 1
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    def inbundle(self, rev):
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        """is rev from the bundle"""
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        if rev < 0:
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            return False
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        return rev in self.basemap
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    def bundlebase(self, rev):
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        return self.basemap[rev]
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    def _chunk(self, rev):
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        # Warning: in case of bundle, the diff is against bundlebase,
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        # not against rev - 1
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        # XXX: could use some caching
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        if not self.inbundle(rev):
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            return revlog.revlog._chunk(self, rev)
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        self.bundle.seek(self.start(rev))
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        return self.bundle.read(self.length(rev))
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    def revdiff(self, rev1, rev2):
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        """return or calculate a delta between two revisions"""
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        if self.inbundle(rev1) and self.inbundle(rev2):
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            # hot path for bundle
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            revb = self.rev(self.bundlebase(rev2))
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            if revb == rev1:
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                return self._chunk(rev2)
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        elif not self.inbundle(rev1) and not self.inbundle(rev2):
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            return revlog.revlog.revdiff(self, rev1, rev2)
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        return mdiff.textdiff(self.revision(self.node(rev1)),
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                         self.revision(self.node(rev2)))
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    def revision(self, node):
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        """return an uncompressed revision of a given"""
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        if node == nullid:
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            return ""
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        text = None
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        chain = []
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        iter_node = node
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        rev = self.rev(iter_node)
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        # reconstruct the revision if it is from a changegroup
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        while self.inbundle(rev):
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            if self._cache and self._cache[0] == iter_node:
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                text = self._cache[2]
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                break
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   117
            chain.append(rev)
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parents:
diff changeset
   118
            iter_node = self.bundlebase(rev)
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diff changeset
   119
            rev = self.rev(iter_node)
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   120
        if text is None:
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parents: 1942
diff changeset
   121
            text = revlog.revlog.revision(self, iter_node)
1942
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parents:
diff changeset
   122
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parents:
diff changeset
   123
        while chain:
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parents: 9650
diff changeset
   124
            delta = self._chunk(chain.pop())
4989
1aaed3d69772 revlog: eliminate diff and patches functions
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diff changeset
   125
            text = mdiff.patches(text, [delta])
1942
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parents:
diff changeset
   126
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   127
        p1, p2 = self.parents(node)
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parents: 1942
diff changeset
   128
        if node != revlog.hash(text, p1, p2):
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   129
            raise error.RevlogError(_("integrity check failed on %s:%d")
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8dafccbcede9 indent: fix alignment
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   130
                                     % (self.datafile, self.rev(node)))
1942
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parents:
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   131
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   132
        self._cache = (node, self.rev(node), text)
1942
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   133
        return text
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   134
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   135
    def addrevision(self, text, transaction, link, p1=None, p2=None, d=None):
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   136
        raise NotImplementedError
6647
602f7c1ab954 drop superfluous param from revlog.addgroup()
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents: 6569
diff changeset
   137
    def addgroup(self, revs, linkmapper, transaction):
1942
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   138
        raise NotImplementedError
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parents:
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   139
    def strip(self, rev, minlink):
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   140
        raise NotImplementedError
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   141
    def checksize(self):
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   142
        raise NotImplementedError
9da45de3118d add bundlerepo.py: a read-only repo that can use uncompressed bundles
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parents:
diff changeset
   143
1946
9fee186f7f0d bundlerepo: remove relative import, fix a comment
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diff changeset
   144
class bundlechangelog(bundlerevlog, changelog.changelog):
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diff changeset
   145
    def __init__(self, opener, bundle):
1946
9fee186f7f0d bundlerepo: remove relative import, fix a comment
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parents: 1942
diff changeset
   146
        changelog.changelog.__init__(self, opener)
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diff changeset
   147
        bundlerevlog.__init__(self, opener, self.indexfile, bundle)
1942
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parents:
diff changeset
   148
1946
9fee186f7f0d bundlerepo: remove relative import, fix a comment
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diff changeset
   149
class bundlemanifest(bundlerevlog, manifest.manifest):
12332
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diff changeset
   150
    def __init__(self, opener, bundle, linkmapper):
1946
9fee186f7f0d bundlerepo: remove relative import, fix a comment
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parents: 1942
diff changeset
   151
        manifest.manifest.__init__(self, opener)
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diff changeset
   152
        bundlerevlog.__init__(self, opener, self.indexfile, bundle,
4257
1b5c38e9d7aa revlog: don't pass datafile as an argument
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parents: 4029
diff changeset
   153
                              linkmapper)
1942
9da45de3118d add bundlerepo.py: a read-only repo that can use uncompressed bundles
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parents:
diff changeset
   154
1946
9fee186f7f0d bundlerepo: remove relative import, fix a comment
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parents: 1942
diff changeset
   155
class bundlefilelog(bundlerevlog, filelog.filelog):
12332
680fe77ab5b8 bundlerepo: use bundle objects everywhere
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parents: 12331
diff changeset
   156
    def __init__(self, opener, path, bundle, linkmapper):
1946
9fee186f7f0d bundlerepo: remove relative import, fix a comment
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parents: 1942
diff changeset
   157
        filelog.filelog.__init__(self, opener, path)
12332
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parents: 12331
diff changeset
   158
        bundlerevlog.__init__(self, opener, self.indexfile, bundle,
4257
1b5c38e9d7aa revlog: don't pass datafile as an argument
Matt Mackall <mpm@selenic.com>
parents: 4029
diff changeset
   159
                              linkmapper)
1942
9da45de3118d add bundlerepo.py: a read-only repo that can use uncompressed bundles
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
diff changeset
   160
1946
9fee186f7f0d bundlerepo: remove relative import, fix a comment
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parents: 1942
diff changeset
   161
class bundlerepository(localrepo.localrepository):
1942
9da45de3118d add bundlerepo.py: a read-only repo that can use uncompressed bundles
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parents:
diff changeset
   162
    def __init__(self, ui, path, bundlename):
6314
9a1c59283ad3 Add ability to directly clone from all-history bundles
John Mulligan <phlogistonjohn@asynchrono.us>
parents: 6312
diff changeset
   163
        self._tempparent = None
9a1c59283ad3 Add ability to directly clone from all-history bundles
John Mulligan <phlogistonjohn@asynchrono.us>
parents: 6312
diff changeset
   164
        try:
9a1c59283ad3 Add ability to directly clone from all-history bundles
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parents: 6312
diff changeset
   165
            localrepo.localrepository.__init__(self, ui, path)
7637
1d54e2f6c0b7 error: move repo errors
Matt Mackall <mpm@selenic.com>
parents: 7633
diff changeset
   166
        except error.RepoError:
6314
9a1c59283ad3 Add ability to directly clone from all-history bundles
John Mulligan <phlogistonjohn@asynchrono.us>
parents: 6312
diff changeset
   167
            self._tempparent = tempfile.mkdtemp()
9198
061eeb602354 coding style: use a space after comma
Martin Geisler <mg@lazybytes.net>
parents: 8312
diff changeset
   168
            localrepo.instance(ui, self._tempparent, 1)
6314
9a1c59283ad3 Add ability to directly clone from all-history bundles
John Mulligan <phlogistonjohn@asynchrono.us>
parents: 6312
diff changeset
   169
            localrepo.localrepository.__init__(self, ui, self._tempparent)
2673
109a22f5434a hooks: add url to changegroup, incoming, prechangegroup, pretxnchangegroup hooks
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2273
diff changeset
   170
6129
3d666e8e6398 bundlerepo: fix inconsistency of parsed and internal name (issue #821)
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents: 5664
diff changeset
   171
        if path:
11154
17031fea4e95 expand paths to local repository or bundle in appropriate classes
Alexander Solovyov <piranha@piranha.org.ua>
parents: 10282
diff changeset
   172
            self._url = 'bundle:' + util.expandpath(path) + '+' + bundlename
6129
3d666e8e6398 bundlerepo: fix inconsistency of parsed and internal name (issue #821)
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents: 5664
diff changeset
   173
        else:
3d666e8e6398 bundlerepo: fix inconsistency of parsed and internal name (issue #821)
Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
parents: 5664
diff changeset
   174
            self._url = 'bundle:' + bundlename
2673
109a22f5434a hooks: add url to changegroup, incoming, prechangegroup, pretxnchangegroup hooks
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2273
diff changeset
   175
2273
f116ddea537f add support for compressed bundle repositories
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 2257
diff changeset
   176
        self.tempfile = None
12332
680fe77ab5b8 bundlerepo: use bundle objects everywhere
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parents: 12331
diff changeset
   177
        f = open(bundlename, "rb")
680fe77ab5b8 bundlerepo: use bundle objects everywhere
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parents: 12331
diff changeset
   178
        self.bundle = changegroup.readbundle(f, bundlename)
680fe77ab5b8 bundlerepo: use bundle objects everywhere
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parents: 12331
diff changeset
   179
        if self.bundle.compressed():
2273
f116ddea537f add support for compressed bundle repositories
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parents: 2257
diff changeset
   180
            fdtemp, temp = tempfile.mkstemp(prefix="hg-bundle-",
f116ddea537f add support for compressed bundle repositories
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parents: 2257
diff changeset
   181
                                            suffix=".hg10un", dir=self.path)
f116ddea537f add support for compressed bundle repositories
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parents: 2257
diff changeset
   182
            self.tempfile = temp
f116ddea537f add support for compressed bundle repositories
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 2257
diff changeset
   183
            fptemp = os.fdopen(fdtemp, 'wb')
f116ddea537f add support for compressed bundle repositories
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 2257
diff changeset
   184
f116ddea537f add support for compressed bundle repositories
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 2257
diff changeset
   185
            try:
f116ddea537f add support for compressed bundle repositories
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 2257
diff changeset
   186
                fptemp.write("HG10UN")
12044
bcc7139521b7 bundlerepo: remove duplication of bundle decompressors
Matt Mackall <mpm@selenic.com>
parents: 11154
diff changeset
   187
                while 1:
12332
680fe77ab5b8 bundlerepo: use bundle objects everywhere
Matt Mackall <mpm@selenic.com>
parents: 12331
diff changeset
   188
                    chunk = self.bundle.read(2**18)
12044
bcc7139521b7 bundlerepo: remove duplication of bundle decompressors
Matt Mackall <mpm@selenic.com>
parents: 11154
diff changeset
   189
                    if not chunk:
bcc7139521b7 bundlerepo: remove duplication of bundle decompressors
Matt Mackall <mpm@selenic.com>
parents: 11154
diff changeset
   190
                        break
2273
f116ddea537f add support for compressed bundle repositories
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parents: 2257
diff changeset
   191
                    fptemp.write(chunk)
f116ddea537f add support for compressed bundle repositories
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 2257
diff changeset
   192
            finally:
f116ddea537f add support for compressed bundle repositories
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 2257
diff changeset
   193
                fptemp.close()
f116ddea537f add support for compressed bundle repositories
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents: 2257
diff changeset
   194
12332
680fe77ab5b8 bundlerepo: use bundle objects everywhere
Matt Mackall <mpm@selenic.com>
parents: 12331
diff changeset
   195
            f = open(self.tempfile, "rb")
680fe77ab5b8 bundlerepo: use bundle objects everywhere
Matt Mackall <mpm@selenic.com>
parents: 12331
diff changeset
   196
            self.bundle = changegroup.readbundle(f, bundlename)
12044
bcc7139521b7 bundlerepo: remove duplication of bundle decompressors
Matt Mackall <mpm@selenic.com>
parents: 11154
diff changeset
   197
1942
9da45de3118d add bundlerepo.py: a read-only repo that can use uncompressed bundles
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
diff changeset
   198
        # dict with the mapping 'filename' -> position in the bundle
9da45de3118d add bundlerepo.py: a read-only repo that can use uncompressed bundles
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
diff changeset
   199
        self.bundlefilespos = {}
5262
a35756389ef4 Make bundlerepo lazier
Brendan Cully <brendan@kublai.com>
parents: 5167
diff changeset
   200
8260
54a4b520bd7d localrepo: use propertycache
Matt Mackall <mpm@selenic.com>
parents: 8227
diff changeset
   201
    @util.propertycache
54a4b520bd7d localrepo: use propertycache
Matt Mackall <mpm@selenic.com>
parents: 8227
diff changeset
   202
    def changelog(self):
12332
680fe77ab5b8 bundlerepo: use bundle objects everywhere
Matt Mackall <mpm@selenic.com>
parents: 12331
diff changeset
   203
        c = bundlechangelog(self.sopener, self.bundle)
680fe77ab5b8 bundlerepo: use bundle objects everywhere
Matt Mackall <mpm@selenic.com>
parents: 12331
diff changeset
   204
        self.manstart = self.bundle.tell()
8260
54a4b520bd7d localrepo: use propertycache
Matt Mackall <mpm@selenic.com>
parents: 8227
diff changeset
   205
        return c
54a4b520bd7d localrepo: use propertycache
Matt Mackall <mpm@selenic.com>
parents: 8227
diff changeset
   206
54a4b520bd7d localrepo: use propertycache
Matt Mackall <mpm@selenic.com>
parents: 8227
diff changeset
   207
    @util.propertycache
54a4b520bd7d localrepo: use propertycache
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parents: 8227
diff changeset
   208
    def manifest(self):
12332
680fe77ab5b8 bundlerepo: use bundle objects everywhere
Matt Mackall <mpm@selenic.com>
parents: 12331
diff changeset
   209
        self.bundle.seek(self.manstart)
680fe77ab5b8 bundlerepo: use bundle objects everywhere
Matt Mackall <mpm@selenic.com>
parents: 12331
diff changeset
   210
        m = bundlemanifest(self.sopener, self.bundle, self.changelog.rev)
680fe77ab5b8 bundlerepo: use bundle objects everywhere
Matt Mackall <mpm@selenic.com>
parents: 12331
diff changeset
   211
        self.filestart = self.bundle.tell()
8260
54a4b520bd7d localrepo: use propertycache
Matt Mackall <mpm@selenic.com>
parents: 8227
diff changeset
   212
        return m
54a4b520bd7d localrepo: use propertycache
Matt Mackall <mpm@selenic.com>
parents: 8227
diff changeset
   213
54a4b520bd7d localrepo: use propertycache
Matt Mackall <mpm@selenic.com>
parents: 8227
diff changeset
   214
    @util.propertycache
54a4b520bd7d localrepo: use propertycache
Matt Mackall <mpm@selenic.com>
parents: 8227
diff changeset
   215
    def manstart(self):
54a4b520bd7d localrepo: use propertycache
Matt Mackall <mpm@selenic.com>
parents: 8227
diff changeset
   216
        self.changelog
54a4b520bd7d localrepo: use propertycache
Matt Mackall <mpm@selenic.com>
parents: 8227
diff changeset
   217
        return self.manstart
54a4b520bd7d localrepo: use propertycache
Matt Mackall <mpm@selenic.com>
parents: 8227
diff changeset
   218
54a4b520bd7d localrepo: use propertycache
Matt Mackall <mpm@selenic.com>
parents: 8227
diff changeset
   219
    @util.propertycache
54a4b520bd7d localrepo: use propertycache
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parents: 8227
diff changeset
   220
    def filestart(self):
54a4b520bd7d localrepo: use propertycache
Matt Mackall <mpm@selenic.com>
parents: 8227
diff changeset
   221
        self.manifest
54a4b520bd7d localrepo: use propertycache
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parents: 8227
diff changeset
   222
        return self.filestart
1942
9da45de3118d add bundlerepo.py: a read-only repo that can use uncompressed bundles
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
diff changeset
   223
2673
109a22f5434a hooks: add url to changegroup, incoming, prechangegroup, pretxnchangegroup hooks
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2273
diff changeset
   224
    def url(self):
109a22f5434a hooks: add url to changegroup, incoming, prechangegroup, pretxnchangegroup hooks
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2273
diff changeset
   225
        return self._url
109a22f5434a hooks: add url to changegroup, incoming, prechangegroup, pretxnchangegroup hooks
Vadim Gelfer <vadim.gelfer@gmail.com>
parents: 2273
diff changeset
   226
1942
9da45de3118d add bundlerepo.py: a read-only repo that can use uncompressed bundles
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
diff changeset
   227
    def file(self, f):
5262
a35756389ef4 Make bundlerepo lazier
Brendan Cully <brendan@kublai.com>
parents: 5167
diff changeset
   228
        if not self.bundlefilespos:
12332
680fe77ab5b8 bundlerepo: use bundle objects everywhere
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parents: 12331
diff changeset
   229
            self.bundle.seek(self.filestart)
5262
a35756389ef4 Make bundlerepo lazier
Brendan Cully <brendan@kublai.com>
parents: 5167
diff changeset
   230
            while 1:
12333
44c7dfc2f6a3 bundle: make getchunk() a method
Matt Mackall <mpm@selenic.com>
parents: 12332
diff changeset
   231
                chunk = self.bundle.chunk()
5262
a35756389ef4 Make bundlerepo lazier
Brendan Cully <brendan@kublai.com>
parents: 5167
diff changeset
   232
                if not chunk:
a35756389ef4 Make bundlerepo lazier
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parents: 5167
diff changeset
   233
                    break
12332
680fe77ab5b8 bundlerepo: use bundle objects everywhere
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parents: 12331
diff changeset
   234
                self.bundlefilespos[chunk] = self.bundle.tell()
12335
e21fe9c5fb25 bundle: get rid of chunkiter
Matt Mackall <mpm@selenic.com>
parents: 12333
diff changeset
   235
                while 1:
e21fe9c5fb25 bundle: get rid of chunkiter
Matt Mackall <mpm@selenic.com>
parents: 12333
diff changeset
   236
                    c = self.bundle.chunk()
e21fe9c5fb25 bundle: get rid of chunkiter
Matt Mackall <mpm@selenic.com>
parents: 12333
diff changeset
   237
                    if not c:
e21fe9c5fb25 bundle: get rid of chunkiter
Matt Mackall <mpm@selenic.com>
parents: 12333
diff changeset
   238
                        break
5262
a35756389ef4 Make bundlerepo lazier
Brendan Cully <brendan@kublai.com>
parents: 5167
diff changeset
   239
1942
9da45de3118d add bundlerepo.py: a read-only repo that can use uncompressed bundles
Benoit Boissinot <benoit.boissinot@ens-lyon.org>
parents:
diff changeset
   240
        if f[0] == '/':
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            f = f[1:]
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        if f in self.bundlefilespos:
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            self.bundle.seek(self.bundlefilespos[f])
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            return bundlefilelog(self.sopener, f, self.bundle,
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                                 self.changelog.rev)
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        else:
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            return filelog.filelog(self.sopener, f)
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    def close(self):
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        """Close assigned bundle file immediately."""
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        self.bundle.close()
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        if self.tempfile is not None:
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            os.unlink(self.tempfile)
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    def __del__(self):
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        del self.bundle
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        if self.tempfile is not None:
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            os.unlink(self.tempfile)
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        if self._tempparent:
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            shutil.rmtree(self._tempparent, True)
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    def cancopy(self):
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        return False
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    def getcwd(self):
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        return os.getcwd() # always outside the repo
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def instance(ui, path, create):
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    if create:
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        raise util.Abort(_('cannot create new bundle repository'))
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    parentpath = ui.config("bundle", "mainreporoot", "")
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    if parentpath:
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        # Try to make the full path relative so we get a nice, short URL.
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        # In particular, we don't want temp dir names in test outputs.
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        cwd = os.getcwd()
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        if parentpath == cwd:
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            parentpath = ''
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        else:
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            cwd = os.path.join(cwd,'')
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            if parentpath.startswith(cwd):
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                parentpath = parentpath[len(cwd):]
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    path = util.drop_scheme('file', path)
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    if path.startswith('bundle:'):
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        path = util.drop_scheme('bundle', path)
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        s = path.split("+", 1)
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        if len(s) == 1:
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            repopath, bundlename = parentpath, s[0]
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        else:
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            repopath, bundlename = s
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    else:
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        repopath, bundlename = parentpath, path
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    return bundlerepository(ui, repopath, bundlename)
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def getremotechanges(ui, repo, other, revs=None, bundlename=None, force=False):
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    tmp = discovery.findcommonincoming(repo, other, heads=revs, force=force)
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    common, incoming, rheads = tmp
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    if not incoming:
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        try:
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            os.unlink(bundlename)
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        except:
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            pass
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        return other, None, None
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    bundle = None
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    if bundlename or not other.local():
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        # create a bundle (uncompressed if other repo is not local)
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        if revs is None and other.capable('changegroupsubset'):
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            revs = rheads
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        if revs is None:
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            cg = other.changegroup(incoming, "incoming")
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        else:
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            cg = other.changegroupsubset(incoming, revs, 'incoming')
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        bundletype = other.local() and "HG10BZ" or "HG10UN"
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        fname = bundle = changegroup.writebundle(cg, bundlename, bundletype)
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        # keep written bundle?
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        if bundlename:
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            bundle = None
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        if not other.local():
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            # use the created uncompressed bundlerepo
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            other = bundlerepository(ui, repo.root, fname)
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    return (other, incoming, bundle)
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   324