diff options
| -rwxr-xr-x | git-rebase--interactive.sh | 26 | ||||
| -rwxr-xr-x | t/t3404-rebase-interactive.sh | 11 |
2 files changed, 37 insertions, 0 deletions
diff --git a/git-rebase--interactive.sh b/git-rebase--interactive.sh index 3dc659dd58..314cd364b8 100755 --- a/git-rebase--interactive.sh +++ b/git-rebase--interactive.sh @@ -442,6 +442,30 @@ do_rest () { done } +# skip picking commits whose parents are unchanged +skip_unnecessary_picks () { + fd=3 + while read command sha1 rest + do + # fd=3 means we skip the command + case "$fd,$command,$(git rev-parse --verify --quiet $sha1^)" in + 3,pick,"$ONTO"*|3,p,"$ONTO"*) + # pick a commit whose parent is current $ONTO -> skip + ONTO=$sha1 + ;; + 3,#*|3,,*) + # copy comments + ;; + *) + fd=1 + ;; + esac + echo "$command${sha1:+ }$sha1${rest:+ }$rest" >&$fd + done <"$TODO" >"$TODO.new" 3>>"$DONE" && + mv -f "$TODO".new "$TODO" || + die "Could not skip unnecessary pick commands" +} + # check if no other options are set is_standalone () { test $# -eq 2 -a "$2" = '--' && @@ -746,6 +770,8 @@ EOF has_action "$TODO" || die_abort "Nothing to do" + test -d "$REWRITTEN" || skip_unnecessary_picks + git update-ref ORIG_HEAD $HEAD output git checkout $ONTO && do_rest ;; diff --git a/t/t3404-rebase-interactive.sh b/t/t3404-rebase-interactive.sh index 603b003edf..c32ff6682b 100755 --- a/t/t3404-rebase-interactive.sh +++ b/t/t3404-rebase-interactive.sh @@ -459,4 +459,15 @@ test_expect_success 'submodule rebase -i' ' FAKE_LINES="1 squash 2 3" git rebase -i A ' +test_expect_success 'avoid unnecessary reset' ' + git checkout master && + test-chmtime =123456789 file3 && + git update-index --refresh && + HEAD=$(git rev-parse HEAD) && + git rebase -i HEAD~4 && + test $HEAD = $(git rev-parse HEAD) && + MTIME=$(test-chmtime -v +0 file3 | sed 's/[^0-9].*$//') && + test 123456789 = $MTIME +' + test_done |