[PATCH 1/3] remote-hg: do not fail on invalid bookmarks

[Max Horn <max@quendi.de>]

From: Antoine Pelisse <apelisse@gmail.com>

Mercurial can have bookmarks pointing to "nullid" (the empty root
revision), while Git can not have references to it.
When cloning or fetching from a Mercurial repository that has such a
bookmark, the import will fail because git-remote-hg will not be able to
create the corresponding reference.

Warn the user about the invalid reference, and continue the import,
instead of stopping right away.

Signed-off-by: Antoine Pelisse <apelisse@gmail.com>
Signed-off-by: Max Horn <max@quendi.de>
---
 contrib/remote-helpers/git-remote-hg | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/contrib/remote-helpers/git-remote-hg b/contrib/remote-helpers/git-remote-hg
index eb89ef6..12d850e 100755
--- a/contrib/remote-helpers/git-remote-hg
+++ b/contrib/remote-helpers/git-remote-hg
@@ -625,6 +625,9 @@ def list_head(repo, cur):
 def do_list(parser):
     repo = parser.repo
     for bmark, node in bookmarks.listbookmarks(repo).iteritems():
+        if node == '0000000000000000000000000000000000000000':
+            warn("Ignoring invalid bookmark '%s'", bmark)
+            continue
         bmarks[bmark] = repo[node]
 
     cur = repo.dirstate.branch()
-- 
1.9.0.7.ga299b13