convert: fix git convert using servers branches

The conversion from git to hg was reading the remote branch list directly from
the origin server. If the origin's branch had moved forward since the last git
fetch, it would return a git hash which didn't exist locally, and therefore the
branch was not converted.

This changes it to rely on the local repo's refs/remotes list of branches
instead, so it's completely cut off from the server.

hgext/convert/git.py

@@ -371,28 +371,31 b' class convert_git(converter_source):'
     def getbookmarks(self):
         bookmarks = {}
 
-        # Interesting references in git are prefixed
-        prefix = 'refs/heads/'
-        prefixlen = len(prefix)
+        # Handle local and remote branches
+        remoteprefix = self.ui.config('convert', 'git.remoteprefix', 'remote')
+        reftypes = [
+            # (git prefix, hg prefix)
+            ('refs/remotes/origin/', remoteprefix + '/'),
+            ('refs/heads/', '')
+        ]
 
-        # factor two commands
-        remoteprefix = self.ui.config('convert', 'git.remoteprefix', 'remote')
-        gitcmd = { remoteprefix + '/': 'git ls-remote --heads origin',
-                                   '': 'git show-ref'}
+        exclude = set([
+            'refs/remotes/origin/HEAD',
+        ])
 
-        # Origin heads
-        for reftype in gitcmd:
-            try:
-                fh = self.gitopen(gitcmd[reftype], err=subprocess.PIPE)
-                for line in fh:
-                    line = line.strip()
-                    rev, name = line.split(None, 1)
-                    if not name.startswith(prefix):
+        try:
+            fh = self.gitopen('git show-ref', err=subprocess.PIPE)
+            for line in fh:
+                line = line.strip()
+                rev, name = line.split(None, 1)
+                # Process each type of branch
+                for gitprefix, hgprefix in reftypes:
+                    if not name.startswith(gitprefix) or name in exclude:
                         continue
-                    name = '%s%s' % (reftype, name[prefixlen:])
+                    name = '%s%s' % (hgprefix, name[len(gitprefix):])
                     bookmarks[name] = rev
-            except Exception:
-                pass
+        except Exception:
+            pass
 
         return bookmarks
 

tests/test-convert-git.t

@@ -666,6 +666,28 b' convert using a different remote prefix'
      master                    0:03bf38caa4c6
      origin/master             0:03bf38caa4c6
 
+Run convert when the remote branches have changed
+(there was an old bug where the local convert read branches from the server)
+
+  $ cd git-repo7
+  $ echo a >> a
+  $ git commit -am "move master forward"
+  [master 0c81947] move master forward
+   Author: nottest <[e-mail]>
+   1 file changed, 1 insertion(+)
+  $ cd ..
+  $ rm -rf hg-repo7
+  $ hg convert --config convert.git.remoteprefix=origin git-repo7-client hg-repo7
+  initializing destination hg-repo7 repository
+  scanning source...
+  sorting...
+  converting...
+  0 commit a
+  updating bookmarks
+  $ hg -R hg-repo7 bookmarks
+     master                    0:03bf38caa4c6
+     origin/master             0:03bf38caa4c6
+
 damaged git repository tests:
 In case the hard-coded hashes change, the following commands can be used to
 list the hashes and their corresponding types in the repository: