"rebase -i": support special-purpose editor to edit insn sheet

diff --git a/git-rebase--interactive.sh b/git-rebase--interactive.sh
index 41ba96aeb7f8ee32f7c346d5d7934f4d6b305d2f..804001bb4e29873ef08d950a40cf1f1745e2aa27 100644 (file)
--- a/git-rebase--interactive.sh
+++ b/git-rebase--interactive.sh
@@ -161,6 +161,19 @@ do_with_author () {
        )
 }
 
+git_sequence_editor () {
+       if test -z "$GIT_SEQUENCE_EDITOR"
+       then
+               GIT_SEQUENCE_EDITOR="$(git config sequence.editor)"
+               if [ -z "$GIT_SEQUENCE_EDITOR" ]
+               then
+                       GIT_SEQUENCE_EDITOR="$(git var GIT_EDITOR)" || return $?
+               fi
+       fi
+
+       eval "$GIT_SEQUENCE_EDITOR" '"$@"'
+}
+
 pick_one () {
        ff=--ff
        case "$1" in -n) sha1=$2; ff= ;; *) sha1=$1 ;; esac
@@ -472,18 +485,24 @@ do_next () {
                git rev-parse --verify HEAD > "$state_dir"/stopped-sha
                ${SHELL:-@SHELL_PATH@} -c "$rest" # Actual execution
                status=$?
+               # Run in subshell because require_clean_work_tree can die.
+               dirty=f
+               (require_clean_work_tree "rebase" 2>/dev/null) || dirty=t
                if test "$status" -ne 0
                then
                        warn "Execution failed: $rest"
+                       test "$dirty" = f ||
+                       warn "and made changes to the index and/or the working tree"
+
                        warn "You can fix the problem, and then run"
                        warn
                        warn "  git rebase --continue"
                        warn
                        exit "$status"
-               fi
-               # Run in subshell because require_clean_work_tree can die.
-               if ! (require_clean_work_tree "rebase")
+               elif test "$dirty" = t
                then
+                       warn "Execution succeeded: $rest"
+                       warn "but left changes to the index and/or the working tree"
                        warn "Commit or stash your changes, and then run"
                        warn
                        warn "  git rebase --continue"
@@ -510,7 +529,9 @@ do_next () {
        refs/*)
                message="$GIT_REFLOG_ACTION: $head_name onto $shortonto" &&
                git update-ref -m "$message" $head_name $newhead $orig_head &&
-               git symbolic-ref HEAD $head_name
+               git symbolic-ref \
+                 -m "$GIT_REFLOG_ACTION: returning to $head_name" \
+                 HEAD $head_name
                ;;
        esac && {
                test ! -f "$state_dir"/verbose ||
@@ -645,8 +666,24 @@ continue)
        then
                : Nothing to commit -- skip this
        else
+               if ! test -f "$author_script"
+               then
+                       die "You have staged changes in your working tree. If these changes are meant to be
+squashed into the previous commit, run:
+
+  git commit --amend
+
+If they are meant to go into a new commit, run:
+
+  git commit
+
+In both case, once you're done, continue with:
+
+  git rebase --continue
+"
+               fi
                . "$author_script" ||
-                       die "Cannot find the author identity"
+                       die "Error trying to find the author identity to amend commit"
                current_head=
                if test -f "$amend"
                then
@@ -711,7 +748,6 @@ then
        # parents to rewrite and skipping dropped commits would
        # prematurely end our probe
        merges_option=
-       first_after_upstream="$(git rev-list --reverse --first-parent $upstream..$orig_head | head -n 1)"
 else
        merges_option="--no-merges --cherry-pick"
 fi
@@ -744,7 +780,7 @@ do
                        preserve=t
                        for p in $(git rev-list --parents -1 $sha1 | cut -d' ' -s -f2-)
                        do
-                               if test -f "$rewritten"/$p -a \( $p != $onto -o $sha1 = $first_after_upstream \)
+                               if test -f "$rewritten"/$p
                                then
                                        preserve=f
                                fi
@@ -809,7 +845,7 @@ has_action "$todo" ||
        die_abort "Nothing to do"
 
 cp "$todo" "$todo".backup
-git_editor "$todo" ||
+git_sequence_editor "$todo" ||
        die_abort "Could not execute editor"
 
 has_action "$todo" ||