[PATCH v2 0/1] Let `git status` handle a not-yet-started `rebase -i` gracefully

When the `done` file is missing, we die()d. This is not necessary, we can do much better than that.

Changes since v1:

- When `done` is missing, we still read `git-rebase-todo` and report the
  next steps.

- We now report a missing git-rebase-todo.

- Added a test (thanks, Matthieu, for prodding me into working harder
  ;-)).

- As I changed so much, I took authorship of the patch.

Johannes Schindelin (1):
  status: be prepared for not-yet-started interactive rebase

 t/t7512-status-help.sh | 19 +++++++++++++++++++
 wt-status.c            | 14 ++++++++++----
 2 files changed, 29 insertions(+), 4 deletions(-)

base-commit: 4e59582ff70d299f5a88449891e78d15b4b3fabe
Published-As: https://github.com/dscho/git/releases/tag/wt-status-v2
Fetch-It-Via: git fetch https://github.com/dscho/git wt-status-v2

Interdiff vs v1:

 diff --git a/t/t7512-status-help.sh b/t/t7512-status-help.sh
 index 5c3db656df..458608cc1e 100755
 --- a/t/t7512-status-help.sh
 +++ b/t/t7512-status-help.sh
 @@ -944,4 +944,23 @@ EOF
  	test_i18ncmp expected actual
  '
  
 +test_expect_success 'status: handle not-yet-started rebase -i gracefully' '
 +	ONTO=$(git rev-parse --short HEAD^) &&
 +	COMMIT=$(git rev-parse --short HEAD) &&
 +	EDITOR="git status --untracked-files=no >actual" git rebase -i HEAD^ &&
 +	cat >expected <<EOF &&
 +On branch several_commits
 +No commands done.
 +Next command to do (1 remaining command):
 +   pick $COMMIT four_commit
 +  (use "git rebase --edit-todo" to view and edit)
 +You are currently editing a commit while rebasing branch '\''several_commits'\'' on '\''$ONTO'\''.
 +  (use "git commit --amend" to amend the current commit)
 +  (use "git rebase --continue" once you are satisfied with your changes)
 +
 +nothing to commit (use -u to show untracked files)
 +EOF
 +	test_i18ncmp expected actual
 +'
 +
  test_done
 diff --git a/wt-status.c b/wt-status.c
 index 13afe66649..4dff0b3e21 100644
 --- a/wt-status.c
 +++ b/wt-status.c
 @@ -1169,12 +1169,12 @@ static void show_rebase_information(struct wt_status *s,
  		struct string_list have_done = STRING_LIST_INIT_DUP;
  		struct string_list yet_to_do = STRING_LIST_INIT_DUP;
  
 -		if ((read_rebase_todolist("rebase-merge/done", &have_done)) ||
 -		    (read_rebase_todolist("rebase-merge/git-rebase-todo",
 -				  &yet_to_do)))
 +		read_rebase_todolist("rebase-merge/done", &have_done);
 +		if (read_rebase_todolist("rebase-merge/git-rebase-todo",
 +					 &yet_to_do))
  			status_printf_ln(s, color,
 -				_("rebase-i not started yet."));
 -		else if (have_done.nr == 0)
 +				_("git-rebase-todo is missing."));
 +		if (have_done.nr == 0)
  			status_printf_ln(s, color, _("No commands done."));
  		else {
  			status_printf_ln(s, color,
 @@ -1192,9 +1192,7 @@ static void show_rebase_information(struct wt_status *s,
  					_("  (see more in file %s)"), git_path("rebase-merge/done"));
  		}
  
 -		if (have_done.nr == 0)
 -			; /* do nothing */
 -		else if (yet_to_do.nr == 0)
 +		if (yet_to_do.nr == 0)
  			status_printf_ln(s, color,
  					 _("No commands remaining."));
  		else {