From 986977847e6fb46448fc9c567292ccd2a93d40b3 Mon Sep 17 00:00:00 2001 From: Phil Hord Date: Sat, 12 Jan 2013 15:46:01 -0500 Subject: [PATCH] rebase --preserve-merges: keep all merge commits including empty ones Since 90e1818f9a (git-rebase: add keep_empty flag, 2012-04-20) 'git rebase --preserve-merges' fails to preserve empty merge commits unless --keep-empty is also specified. Merge commits should be preserved in order to preserve the structure of the rebased graph, even if the merge commit does not introduce changes to the parent. Teach rebase not to drop merge commits only because they are empty. A special case which is not handled by this change is for a merge commit whose parents are now the same commit because all the previous different parents have been dropped as a result of this rebase or some previous operation. Signed-off-by: Phil Hord Acked-by: Neil Horman Signed-off-by: Junio C Hamano --- git-rebase--interactive.sh | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/git-rebase--interactive.sh b/git-rebase--interactive.sh index 0c19b7c75..2fed92fac 100644 --- a/git-rebase--interactive.sh +++ b/git-rebase--interactive.sh @@ -175,6 +175,11 @@ is_empty_commit() { test "$tree" = "$ptree" } +is_merge_commit() +{ + git rev-parse --verify --quiet "$1"^2 >/dev/null 2>&1 +} + # Run command with GIT_AUTHOR_NAME, GIT_AUTHOR_EMAIL, and # GIT_AUTHOR_DATE exported from the current environment. do_with_author () { @@ -796,7 +801,7 @@ git rev-list $merges_option --pretty=oneline --abbrev-commit \ while read -r shortsha1 rest do - if test -z "$keep_empty" && is_empty_commit $shortsha1 + if test -z "$keep_empty" && is_empty_commit $shortsha1 && ! is_merge_commit $shortsha1 then comment_out="# " else -- 2.26.2