Fast-forward the published head when possible

This is to avoid a merge commit when fast-forwarding is possible.

Signed-off-by: Catalin Marinas <catalin.marinas@gmail.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/stgit/commands/publish.py b/stgit/commands/publish.py
index d829916..71b8118 100644
--- a/stgit/commands/publish.py
+++ b/stgit/commands/publish.py
@@ -109,6 +109,11 @@ def func(parser, options, args):
     # check for rebased stack. In this case we emulate a merge with the stack
     # base by setting two parents.
     merge_bases = repository.get_merge_bases(public_head, stack.base)
+    if public_head in merge_bases:
+        # fast-forward the public ref
+        repository.refs.set(public_ref, stack.head, 'publish')
+        out.info('Fast-forwarded "%s"' % public_ref)
+        return
     if not stack.base in merge_bases:
         message = 'Merge %s into %s' % (repository.describe(stack.base).strip(),
                                         utils.strip_prefix('refs/heads/',