[PATCH 0/3] rev-list --simplify-{merges,by-decoration} --first-parent

The deeper history simplification using merge information (not to be confused with "merge simplification") was not prepared to be used with the --first-parent option, but it was possible to trigger this combination from gitk.

The fix is fairly straight-forward. When showing only first-parent chain of history, the later parents won't matter in the result, so we can just rewrite the parents and make the history a single strand of pearls.

Showing first-parent-only history and then attempting to simplify merges does not make much sense, but simplify-by-decoration may be a valid thing to ask.

Junio C Hamano (3):
  revision: "simplify" options imply topo-order sort
  revision: note the lack of free() in simplify_merges()
  revision: cull side parents before running simplify-merges

 revision.c | 30 +++++++++++++++++++++---------
 1 file changed, 21 insertions(+), 9 deletions(-)