add hg and python

1 files changed, 152 insertions, 0 deletions

diff --git a/sys/lib/python/hgext/convert/git.py b/sys/lib/python/hgext/convert/git.py
new file mode 100644
index 000000000..d529744ac
--- /dev/null
+++ b/sys/lib/python/hgext/convert/git.py
@@ -0,0 +1,152 @@
+# git.py - git support for the convert extension
+#
+#  Copyright 2005-2009 Matt Mackall <mpm@selenic.com> and others
+#
+# This software may be used and distributed according to the terms of the
+# GNU General Public License version 2, incorporated herein by reference.
+
+import os
+from mercurial import util
+
+from common import NoRepo, commit, converter_source, checktool
+
+class convert_git(converter_source):
+    # Windows does not support GIT_DIR= construct while other systems
+    # cannot remove environment variable. Just assume none have
+    # both issues.
+    if hasattr(os, 'unsetenv'):
+        def gitcmd(self, s):
+            prevgitdir = os.environ.get('GIT_DIR')
+            os.environ['GIT_DIR'] = self.path
+            try:
+                return util.popen(s, 'rb')
+            finally:
+                if prevgitdir is None:
+                    del os.environ['GIT_DIR']
+                else:
+                    os.environ['GIT_DIR'] = prevgitdir
+    else:
+        def gitcmd(self, s):
+            return util.popen('GIT_DIR=%s %s' % (self.path, s), 'rb')
+
+    def __init__(self, ui, path, rev=None):
+        super(convert_git, self).__init__(ui, path, rev=rev)
+
+        if os.path.isdir(path + "/.git"):
+            path += "/.git"
+        if not os.path.exists(path + "/objects"):
+            raise NoRepo("%s does not look like a Git repo" % path)
+
+        checktool('git', 'git')
+
+        self.path = path
+
+    def getheads(self):
+        if not self.rev:
+            return self.gitcmd('git rev-parse --branches --remotes').read().splitlines()
+        else:
+            fh = self.gitcmd("git rev-parse --verify %s" % self.rev)
+            return [fh.read()[:-1]]
+
+    def catfile(self, rev, type):
+        if rev == "0" * 40: raise IOError()
+        fh = self.gitcmd("git cat-file %s %s" % (type, rev))
+        return fh.read()
+
+    def getfile(self, name, rev):
+        return self.catfile(rev, "blob")
+
+    def getmode(self, name, rev):
+        return self.modecache[(name, rev)]
+
+    def getchanges(self, version):
+        self.modecache = {}
+        fh = self.gitcmd("git diff-tree -z --root -m -r %s" % version)
+        changes = []
+        seen = set()
+        entry = None
+        for l in fh.read().split('\x00'):
+            if not entry:
+                if not l.startswith(':'):
+                    continue
+                entry = l
+                continue
+            f = l
+            if f not in seen:
+                seen.add(f)
+                entry = entry.split()
+                h = entry[3]
+                p = (entry[1] == "100755")
+                s = (entry[1] == "120000")
+                self.modecache[(f, h)] = (p and "x") or (s and "l") or ""
+                changes.append((f, h))
+            entry = None
+        return (changes, {})
+
+    def getcommit(self, version):
+        c = self.catfile(version, "commit") # read the commit hash
+        end = c.find("\n\n")
+        message = c[end+2:]
+        message = self.recode(message)
+        l = c[:end].splitlines()
+        parents = []
+        author = committer = None
+        for e in l[1:]:
+            n, v = e.split(" ", 1)
+            if n == "author":
+                p = v.split()
+                tm, tz = p[-2:]
+                author = " ".join(p[:-2])
+                if author[0] == "<": author = author[1:-1]
+                author = self.recode(author)
+            if n == "committer":
+                p = v.split()
+                tm, tz = p[-2:]
+                committer = " ".join(p[:-2])
+                if committer[0] == "<": committer = committer[1:-1]
+                committer = self.recode(committer)
+            if n == "parent": parents.append(v)
+
+        if committer and committer != author:
+            message += "\ncommitter: %s\n" % committer
+        tzs, tzh, tzm = tz[-5:-4] + "1", tz[-4:-2], tz[-2:]
+        tz = -int(tzs) * (int(tzh) * 3600 + int(tzm))
+        date = tm + " " + str(tz)
+
+        c = commit(parents=parents, date=date, author=author, desc=message,
+                   rev=version)
+        return c
+
+    def gettags(self):
+        tags = {}
+        fh = self.gitcmd('git ls-remote --tags "%s"' % self.path)
+        prefix = 'refs/tags/'
+        for line in fh:
+            line = line.strip()
+            if not line.endswith("^{}"):
+                continue
+            node, tag = line.split(None, 1)
+            if not tag.startswith(prefix):
+                continue
+            tag = tag[len(prefix):-3]
+            tags[tag] = node
+
+        return tags
+
+    def getchangedfiles(self, version, i):
+        changes = []
+        if i is None:
+            fh = self.gitcmd("git diff-tree --root -m -r %s" % version)
+            for l in fh:
+                if "\t" not in l:
+                    continue
+                m, f = l[:-1].split("\t")
+                changes.append(f)
+            fh.close()
+        else:
+            fh = self.gitcmd('git diff-tree --name-only --root -r %s "%s^%s" --'
+                             % (version, version, i+1))
+            changes = [f.rstrip('\n') for f in fh]
+            fh.close()
+
+        return changes