To avoid problems with short SHA-1s that become non-unique during the
rebase, we rewrite the todo script with short/long SHA-1s before and
after letting the user edit the script. Since SHA-1s are not intuitive
for humans, rebase -i also provides the onelines (commit message
subjects) in the script, purely for the user's convenience.
It is very possible to generate a todo script via different means than
rebase -i and then to let rebase -i run with it; In this case, these
onelines are not required.
And this is where the expand/collapse machinery has a bug: it *expects*
that oneline, and failing to find one reuses the previous SHA-1 as
"oneline".
It was most likely an oversight, and made implementation in the (quite
limiting) shell script language less convoluted. However, we are about
to reimplement performance-critical parts in C (and due to spawning a
git.exe process for every single line of the todo script, the
expansion/collapsing of the SHA-1s *is* performance-hampering on
Windows), therefore let's fix this bug to make cross-validation with the
C version of that functionality possible.
Signed-off-by: Johannes Schindelin <johannes.schindelin@xxxxxx>
---
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 93372c62b2e..9d65212b7f1 100644
--- a/git-rebase--interactive.sh
+++ b/git-rebase--interactive.sh
@@ -760,7 +760,12 @@ transform_todo_ids () {
;;
*)
sha1=$(git rev-parse --verify --quiet "$@" ${rest%%[ ]*}) &&
- rest="$sha1 ${rest#*[ ]}"
+ if test "a$rest" = "a${rest#*[ ]}"
+ then
+ rest=$sha1
+ else
+ rest="$sha1 ${rest#*[ ]}"
+ fi
;;
esac
printf '%s\n' "$command${rest:+ }$rest"
--
2.13.1.windows.1.1.ga36e14b3aaa