hgext/convert/git.py
author Matt Mackall <mpm@selenic.com>
Mon, 14 Jul 2014 18:53:03 -0500
changeset 21873 cf599f8a2da8
parent 21630 a204fd9b5ba9
parent 21868 3420346174b1
child 21958 9663a7855798
permissions -rw-r--r--
merge with stable
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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# git.py - git support 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 os
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import subprocess
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from mercurial import util, config
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from mercurial.node import hex, nullid
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from mercurial.i18n import _
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from common import NoRepo, commit, converter_source, checktool
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class submodule(object):
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    def __init__(self, path, node, url):
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        self.path = path
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        self.node = node
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        self.url = url
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    def hgsub(self):
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        return "%s = [git]%s" % (self.path, self.url)
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    def hgsubstate(self):
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        return "%s %s" % (self.node, self.path)
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class convert_git(converter_source):
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    # Windows does not support GIT_DIR= construct while other systems
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    # cannot remove environment variable. Just assume none have
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    # both issues.
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    if util.safehasattr(os, 'unsetenv'):
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        def gitopen(self, s, err=None):
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            prevgitdir = os.environ.get('GIT_DIR')
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            os.environ['GIT_DIR'] = self.path
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            try:
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                if err == subprocess.PIPE:
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                    (stdin, stdout, stderr) = util.popen3(s)
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                    return stdout
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                elif err == subprocess.STDOUT:
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                    return self.popen_with_stderr(s)
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                else:
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                    return util.popen(s, 'rb')
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            finally:
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                if prevgitdir is None:
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                    del os.environ['GIT_DIR']
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                else:
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                    os.environ['GIT_DIR'] = prevgitdir
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        def gitpipe(self, s):
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            prevgitdir = os.environ.get('GIT_DIR')
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            os.environ['GIT_DIR'] = self.path
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            try:
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                return util.popen3(s)
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            finally:
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                if prevgitdir is None:
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                    del os.environ['GIT_DIR']
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                else:
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                    os.environ['GIT_DIR'] = prevgitdir
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    else:
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        def gitopen(self, s, err=None):
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            if err == subprocess.PIPE:
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                (sin, so, se) = util.popen3('GIT_DIR=%s %s' % (self.path, s))
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                return so
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            elif err == subprocess.STDOUT:
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                    return self.popen_with_stderr(s)
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            else:
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                return util.popen('GIT_DIR=%s %s' % (self.path, s), 'rb')
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        def gitpipe(self, s):
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            return util.popen3('GIT_DIR=%s %s' % (self.path, s))
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    def popen_with_stderr(self, s):
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        p = subprocess.Popen(s, shell=True, bufsize=-1,
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                             close_fds=util.closefds,
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                             stdin=subprocess.PIPE,
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                             stdout=subprocess.PIPE,
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                             stderr=subprocess.STDOUT,
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                             universal_newlines=False,
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                             env=None)
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        return p.stdout
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    def gitread(self, s):
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        fh = self.gitopen(s)
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        data = fh.read()
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        return data, fh.close()
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    def __init__(self, ui, path, rev=None):
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        super(convert_git, self).__init__(ui, path, rev=rev)
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        if os.path.isdir(path + "/.git"):
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            path += "/.git"
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        if not os.path.exists(path + "/objects"):
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            raise NoRepo(_("%s does not look like a Git repository") % path)
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        checktool('git', 'git')
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        self.path = path
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        self.submodules = []
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        self.catfilepipe = self.gitpipe('git cat-file --batch')
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    def after(self):
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        for f in self.catfilepipe:
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            f.close()
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    def getheads(self):
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        if not self.rev:
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            heads, ret = self.gitread('git rev-parse --branches --remotes')
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            heads = heads.splitlines()
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        else:
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            heads, ret = self.gitread("git rev-parse --verify %s" % self.rev)
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            heads = [heads[:-1]]
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        if ret:
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            raise util.Abort(_('cannot retrieve git heads'))
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        return heads
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    def catfile(self, rev, type):
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        if rev == hex(nullid):
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            raise IOError
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        self.catfilepipe[0].write(rev+'\n')
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        self.catfilepipe[0].flush()
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        info = self.catfilepipe[1].readline().split()
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        if info[1] != type:
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            raise util.Abort(_('cannot read %r object at %s') % (type, rev))
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        size = int(info[2])
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        data = self.catfilepipe[1].read(size)
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        if len(data) < size:
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            raise util.Abort(_('cannot read %r object at %s: %s') % (type, rev))
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        # read the trailing newline
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        self.catfilepipe[1].read(1)
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        return data
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    def getfile(self, name, rev):
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        if rev == hex(nullid):
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            raise IOError
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        if name == '.hgsub':
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            data = '\n'.join([m.hgsub() for m in self.submoditer()])
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            mode = ''
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        elif name == '.hgsubstate':
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            data = '\n'.join([m.hgsubstate() for m in self.submoditer()])
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            mode = ''
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        else:
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            data = self.catfile(rev, "blob")
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            mode = self.modecache[(name, rev)]
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        return data, mode
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    def submoditer(self):
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        null = hex(nullid)
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        for m in sorted(self.submodules, key=lambda p: p.path):
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            if m.node != null:
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                yield m
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    def parsegitmodules(self, content):
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        """Parse the formatted .gitmodules file, example file format:
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        [submodule "sub"]\n
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        \tpath = sub\n
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        \turl = git://giturl\n
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   160
        """
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   161
        self.submodules = []
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        c = config.config()
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   163
        # Each item in .gitmodules starts with \t that cant be parsed
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        c.parse('.gitmodules', content.replace('\t',''))
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        for sec in c.sections():
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            s = c[sec]
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            if 'url' in s and 'path' in s:
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   168
                self.submodules.append(submodule(s['path'], '', s['url']))
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   169
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    def retrievegitmodules(self, version):
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        modules, ret = self.gitread("git show %s:%s" % (version, '.gitmodules'))
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        if ret:
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   173
            raise util.Abort(_('cannot read submodules config file in %s') %
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   174
                             version)
17929
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        self.parsegitmodules(modules)
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   176
        for m in self.submodules:
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            node, ret = self.gitread("git rev-parse %s:%s" % (version, m.path))
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   178
            if ret:
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   179
                continue
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            m.node = node.strip()
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    def getchanges(self, version):
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   183
        self.modecache = {}
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   184
        fh = self.gitopen("git diff-tree -z --root -m -r %s" % version)
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   185
        changes = []
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diff changeset
   186
        seen = set()
7242
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   187
        entry = None
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   188
        subexists = False
21868
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   189
        subdeleted = False
7242
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diff changeset
   190
        for l in fh.read().split('\x00'):
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diff changeset
   191
            if not entry:
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diff changeset
   192
                if not l.startswith(':'):
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   193
                    continue
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   194
                entry = l
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diff changeset
   195
                continue
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diff changeset
   196
            f = l
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diff changeset
   197
            if f not in seen:
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diff changeset
   198
                seen.add(f)
7242
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   199
                entry = entry.split()
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diff changeset
   200
                h = entry[3]
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diff changeset
   201
                p = (entry[1] == "100755")
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   202
                s = (entry[1] == "120000")
17929
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diff changeset
   203
0eed66327ad4 convert: add support for converting git submodule (issue3528)
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   204
                if f == '.gitmodules':
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   205
                    subexists = True
21868
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diff changeset
   206
                    if entry[4] == 'D':
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diff changeset
   207
                        subdeleted = True
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diff changeset
   208
                        changes.append(('.hgsub', hex(nullid)))
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diff changeset
   209
                    else:
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   210
                        changes.append(('.hgsub', ''))
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diff changeset
   211
                elif entry[1] == '160000' or entry[0] == ':160000':
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   212
                    subexists = True
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   213
                else:
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   214
                    self.modecache[(f, h)] = (p and "x") or (s and "l") or ""
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diff changeset
   215
                    changes.append((f, h))
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diff changeset
   216
            entry = None
10987
b3af02b1f19f convert/git: check status when reading output stream
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diff changeset
   217
        if fh.close():
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diff changeset
   218
            raise util.Abort(_('cannot read changes in %s') % version)
17929
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diff changeset
   219
0eed66327ad4 convert: add support for converting git submodule (issue3528)
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   220
        if subexists:
21868
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diff changeset
   221
            if subdeleted:
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diff changeset
   222
                changes.append(('.hgsubstate', hex(nullid)))
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diff changeset
   223
            else:
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diff changeset
   224
                self.retrievegitmodules(version)
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diff changeset
   225
                changes.append(('.hgsubstate', ''))
5121
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parents: 4873
diff changeset
   226
        return (changes, {})
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   227
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   228
    def getcommit(self, version):
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diff changeset
   229
        c = self.catfile(version, "commit") # read the commit hash
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   230
        end = c.find("\n\n")
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diff changeset
   231
        message = c[end + 2:]
4759
20ec5cc02f18 convert: ove recode method into converter_source
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parents: 4721
diff changeset
   232
        message = self.recode(message)
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   233
        l = c[:end].splitlines()
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   234
        parents = []
8271
e3d3dad805f9 Add committer tag only when needed in git conversion
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diff changeset
   235
        author = committer = None
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diff changeset
   236
        for e in l[1:]:
4532
c3a78a49d7f0 Some small cleanups for convert extension:
Thomas Arendsen Hein <thomas@intevation.de>
parents: 4521
diff changeset
   237
            n, v = e.split(" ", 1)
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   238
            if n == "author":
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diff changeset
   239
                p = v.split()
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adb3de56635b convert-repo: Fix timezone handling
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diff changeset
   240
                tm, tz = p[-2:]
316
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   241
                author = " ".join(p[:-2])
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diff changeset
   242
                if author[0] == "<": author = author[1:-1]
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diff changeset
   243
                author = self.recode(author)
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diff changeset
   244
            if n == "committer":
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dfc44f3f587c convert-repo fixups
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diff changeset
   245
                p = v.split()
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diff changeset
   246
                tm, tz = p[-2:]
431
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diff changeset
   247
                committer = " ".join(p[:-2])
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parents: 316
diff changeset
   248
                if committer[0] == "<": committer = committer[1:-1]
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parents: 4721
diff changeset
   249
                committer = self.recode(committer)
10282
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parents: 10263
diff changeset
   250
            if n == "parent":
08a0f04b56bd many, many trivial check-code fixups
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diff changeset
   251
                parents.append(v)
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parents: 1335
diff changeset
   252
8271
e3d3dad805f9 Add committer tag only when needed in git conversion
Richard Quirk <richard.quirk@gmail.com>
parents: 8250
diff changeset
   253
        if committer and committer != author:
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diff changeset
   254
            message += "\ncommitter: %s\n" % committer
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adb3de56635b convert-repo: Fix timezone handling
Matt Mackall <mpm@selenic.com>
parents: 1335
diff changeset
   255
        tzs, tzh, tzm = tz[-5:-4] + "1", tz[-4:-2], tz[-2:]
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        tz = -int(tzs) * (int(tzh) * 3600 + int(tzm))
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        date = tm + " " + str(tz)
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        c = commit(parents=parents, date=date, author=author, desc=message,
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                   rev=version)
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        return c
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    def gettags(self):
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        tags = {}
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        alltags = {}
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   266
        fh = self.gitopen('git ls-remote --tags "%s"' % self.path,
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                          err=subprocess.STDOUT)
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        prefix = 'refs/tags/'
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   269
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        # Build complete list of tags, both annotated and bare ones
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   271
        for line in fh:
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            line = line.strip()
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            if line.startswith("error:") or line.startswith("fatal:"):
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                raise util.Abort(_('cannot read tags from %s') % self.path)
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            node, tag = line.split(None, 1)
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            if not tag.startswith(prefix):
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                continue
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            alltags[tag[len(prefix):]] = node
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        if fh.close():
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            raise util.Abort(_('cannot read tags from %s') % self.path)
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        # Filter out tag objects for annotated tag refs
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        for tag in alltags:
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            if tag.endswith('^{}'):
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                tags[tag[:-3]] = alltags[tag]
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   286
            else:
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   287
                if tag + '^{}' in alltags:
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                    continue
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                else:
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                    tags[tag] = alltags[tag]
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        return tags
5380
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parents: 5336
diff changeset
   293
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   294
    def getchangedfiles(self, version, i):
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   295
        changes = []
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diff changeset
   296
        if i is None:
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7fab6ae3f688 convert/git: rename gitcmd() into gitopen() for readability
Patrick Mezard <pmezard@gmail.com>
parents: 10939
diff changeset
   297
            fh = self.gitopen("git diff-tree --root -m -r %s" % version)
5380
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parents: 5336
diff changeset
   298
            for l in fh:
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diff changeset
   299
                if "\t" not in l:
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diff changeset
   300
                    continue
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diff changeset
   301
                m, f = l[:-1].split("\t")
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diff changeset
   302
                changes.append(f)
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parents: 5336
diff changeset
   303
        else:
16683
525fdb738975 cleanup: eradicate long lines
Brodie Rao <brodie@sf.io>
parents: 16295
diff changeset
   304
            fh = self.gitopen('git diff-tree --name-only --root -r %s '
525fdb738975 cleanup: eradicate long lines
Brodie Rao <brodie@sf.io>
parents: 16295
diff changeset
   305
                              '"%s^%s" --' % (version, version, i + 1))
5380
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parents: 5336
diff changeset
   306
            changes = [f.rstrip('\n') for f in fh]
10987
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parents: 10986
diff changeset
   307
        if fh.close():
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diff changeset
   308
            raise util.Abort(_('cannot read changes in %s') % version)
5380
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diff changeset
   309
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   310
        return changes
13756
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Edouard Gomez <ed.gomez@free.fr>
parents: 12144
diff changeset
   311
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diff changeset
   312
    def getbookmarks(self):
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   313
        bookmarks = {}
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diff changeset
   314
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diff changeset
   315
        # Interesting references in git are prefixed
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diff changeset
   316
        prefix = 'refs/heads/'
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parents: 12144
diff changeset
   317
        prefixlen = len(prefix)
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parents: 12144
diff changeset
   318
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diff changeset
   319
        # factor two commands
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diff changeset
   320
        gitcmd = { 'remote/': 'git ls-remote --heads origin',
6b7077df4aa5 convert: add bookmarks reading support to git backend
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parents: 12144
diff changeset
   321
                          '': 'git show-ref'}
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parents: 12144
diff changeset
   322
6b7077df4aa5 convert: add bookmarks reading support to git backend
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diff changeset
   323
        # Origin heads
6b7077df4aa5 convert: add bookmarks reading support to git backend
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parents: 12144
diff changeset
   324
        for reftype in gitcmd:
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diff changeset
   325
            try:
18570
dcf2d6fdf630 convert/git: catch errors from modern git-ls-remote (issue3428)
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parents: 17930
diff changeset
   326
                fh = self.gitopen(gitcmd[reftype], err=subprocess.PIPE)
13756
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parents: 12144
diff changeset
   327
                for line in fh:
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diff changeset
   328
                    line = line.strip()
6b7077df4aa5 convert: add bookmarks reading support to git backend
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diff changeset
   329
                    rev, name = line.split(None, 1)
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diff changeset
   330
                    if not name.startswith(prefix):
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diff changeset
   331
                        continue
6b7077df4aa5 convert: add bookmarks reading support to git backend
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diff changeset
   332
                    name = '%s%s' % (reftype, name[prefixlen:])
6b7077df4aa5 convert: add bookmarks reading support to git backend
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parents: 12144
diff changeset
   333
                    bookmarks[name] = rev
16689
f366d4c2ff34 cleanup: replace naked excepts with except Exception: ...
Brodie Rao <brodie@sf.io>
parents: 16687
diff changeset
   334
            except Exception:
13756
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parents: 12144
diff changeset
   335
                pass
6b7077df4aa5 convert: add bookmarks reading support to git backend
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diff changeset
   336
6b7077df4aa5 convert: add bookmarks reading support to git backend
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diff changeset
   337
        return bookmarks
19121
478a04605ce1 splicemap: improve error handling when source is git (issue2084)
Ben Goswami <bengoswami@fb.com>
parents: 18572
diff changeset
   338
20373
e8203629371b convert: add mapname parameter to checkrevformat
Sean Farley <sean.michael.farley@gmail.com>
parents: 19121
diff changeset
   339
    def checkrevformat(self, revstr, mapname='splicemap'):
19121
478a04605ce1 splicemap: improve error handling when source is git (issue2084)
Ben Goswami <bengoswami@fb.com>
parents: 18572
diff changeset
   340
        """ git revision string is a 40 byte hex """
20373
e8203629371b convert: add mapname parameter to checkrevformat
Sean Farley <sean.michael.farley@gmail.com>
parents: 19121
diff changeset
   341
        self.checkhexformat(revstr, mapname)
19121
478a04605ce1 splicemap: improve error handling when source is git (issue2084)
Ben Goswami <bengoswami@fb.com>
parents: 18572
diff changeset
   342