git-svn: handle merge-base failures
Change git-svn to warn and continue when merge-base fails while processing svn
merge tickets.
merge-base can fail when a partial branch is created and merged back to trunk
in svn, because it cannot find a common ancestor between the partial branch and
trunk.
Signed-off-by: Andrew Myrick <amyrick@apple.com>
Acked-by: Sam Vilain <sam@vilain.net>
Acked-by: Eric Wong <normalperson@yhbt.net>
diff --git a/git-svn.perl b/git-svn.perl
index 947184a..e0773ef 100755
--- a/git-svn.perl
+++ b/git-svn.perl
@@ -3158,10 +3158,21 @@
my $ranges = $ranges{$merge_tip};
# check out 'new' tips
- my $merge_base = command_oneline(
- "merge-base",
- @$parents, $merge_tip,
- );
+ my $merge_base;
+ eval {
+ $merge_base = command_oneline(
+ "merge-base",
+ @$parents, $merge_tip,
+ );
+ };
+ if ($@) {
+ die "An error occurred during merge-base"
+ unless $@->isa("Git::Error::Command");
+
+ warn "W: Cannot find common ancestor between ".
+ "@$parents and $merge_tip. Ignoring merge info.\n";
+ next;
+ }
# double check that there are no missing non-merge commits
my (@incomplete) = check_cherry_pick(
