rebase -i: rewrite the rest of init_revisions_and_shortrevisions() in C

This rewrites the part of init_revisions_and_shortrevisions() needed by
`--complete-action` (which initialize $shortrevisions) from shell to C.

When `upstream` is empty, it means that the user launched a `rebase
--root`, and `onto` contains the ID of an empty commit.  As a range
between an empty commit and `head` is not really meaningful, `onto` is
not used to initialize `shortrevisions` in this case.

The corresponding arguments passed to `--complete-action` are then
dropped, and init_revisions_and_shortrevisions() is stripped from
git-rebase--interactive.sh

Signed-off-by: Alban Gruin <alban.gruin@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 4 insertions, 23 deletions

diff --git a/git-rebase--interactive.sh b/git-rebase--interactive.sh
index 4ca47ae..08e9a21 100644
--- a/git-rebase--interactive.sh
+++ b/git-rebase--interactive.sh
@@ -60,23 +60,6 @@ init_basic_state () {
 	write_basic_state
 }
 
-init_revisions_and_shortrevisions () {
-	shorthead=$(git rev-parse --short $orig_head)
-	shortonto=$(git rev-parse --short $onto)
-	if test -z "$rebase_root"
-		# this is now equivalent to ! -z "$upstream"
-	then
-		shortupstream=$(git rev-parse --short $upstream)
-		revisions=$upstream...$orig_head
-		shortrevisions=$shortupstream..$shorthead
-	else
-		revisions=$onto...$orig_head
-		shortrevisions=$shorthead
-		test -z "$squash_onto" ||
-		echo "$squash_onto" >"$state_dir"/squash-onto
-	fi
-}
-
 git_rebase__interactive () {
 	initiate_action "$action"
 	ret=$?
@@ -87,8 +70,6 @@ git_rebase__interactive () {
 	git rebase--helper --prepare-branch "$switch_to" ${verbose:+--verbose}
 	init_basic_state
 
-	init_revisions_and_shortrevisions
-
 	git rebase--helper --make-script ${keep_empty:+--keep-empty} \
 		${rebase_merges:+--rebase-merges} \
 		${rebase_cousins:+--rebase-cousins} \
@@ -97,8 +78,8 @@ git_rebase__interactive () {
 		${restrict_revision:+--restrict-revision ^"$restrict_revision"} >"$todo" ||
 	die "$(gettext "Could not generate todo list")"
 
-	exec git rebase--helper --complete-action "$shortrevisions" "$onto_name" \
-		"$shortonto" "$orig_head" "$cmd" $allow_empty_message \
-		${autosquash:+--autosquash} ${keep_empty:+--keep-empty} \
-		${verbose:+--verbose} ${force_rebase:+--no-ff}
+	exec git rebase--helper --complete-action "$onto_name" "$cmd" \
+		$allow_empty_message ${autosquash:+--autosquash} ${verbose:+--verbose} \
+		${keep_empty:+--keep-empty} ${force_rebase:+--no-ff} \
+		${upstream:+--upstream "$upstream"} ${onto:+--onto "$onto"}
 }