From: Phillip Wood <phillip.w...@dunelm.org.uk>

I've updated the first patch as per Junio's suggestions and added
tests for revert as well as cherry-pick. I've also changed the second
patch to avoid printing the oid of the origin of the commit that's
just been created and added tests for revert as well as
cherry-pick. In the end I didn't add any messages when we remove
.git/sequencer as we don't say anything when we remove
CHERRY_PICK_HEAD at the moment. Duy mentioned this, I could add this
if there is a strong demand for it.

Phillip Wood (2):
  commit/reset: try to clean up sequencer state
  fix cherry-pick/revert status after commit

 branch.c                        |  4 +-
 builtin/commit.c                |  3 +-
 sequencer.c                     | 86 +++++++++++++++++++++++++++++++++
 sequencer.h                     |  3 ++
 t/t3507-cherry-pick-conflict.sh | 39 +++++++++++++++
 t/t7512-status-help.sh          | 36 ++++++++++++++
 wt-status.c                     | 39 +++++++++++++--
 7 files changed, 201 insertions(+), 9 deletions(-)

Range-diff against v1:
1:  9b310618ed ! 1:  e963e02628 commit/reset: try to clean up sequencer state
    @@ -32,10 +32,7 @@
      {
     -  unlink(git_path_cherry_pick_head(r));
     -  unlink(git_path_revert_head(r));
    -+  if (!unlink(git_path_cherry_pick_head(r)))
    -+          sequencer_post_commit_cleanup();
    -+  if (!unlink(git_path_revert_head(r)))
    -+          sequencer_post_commit_cleanup();
    ++  sequencer_post_commit_cleanup(r);
        unlink(git_path_merge_head(r));
        unlink(git_path_merge_rr(r));
        unlink(git_path_merge_msg(r));
    @@ -49,21 +46,10 @@
      
     -  unlink(git_path_cherry_pick_head(the_repository));
     -  unlink(git_path_revert_head(the_repository));
    -+  if (!unlink(git_path_cherry_pick_head(the_repository)))
    -+          sequencer_post_commit_cleanup();
    -+  if (!unlink(git_path_revert_head(the_repository)))
    -+          sequencer_post_commit_cleanup();
    ++  sequencer_post_commit_cleanup(the_repository);
        unlink(git_path_merge_head(the_repository));
        unlink(git_path_merge_msg(the_repository));
        unlink(git_path_merge_mode(the_repository));
    -@@
    -   if (amend && !no_post_rewrite) {
    -           commit_post_rewrite(the_repository, current_head, &oid);
    -   }
    -+
    -   if (!quiet) {
    -           unsigned int flags = 0;
    - 
     
      diff --git a/sequencer.c b/sequencer.c
      --- a/sequencer.c
    @@ -72,27 +58,55 @@
        return len;
      }
      
    -+void sequencer_post_commit_cleanup(void)
    ++static int have_finished_the_last_pick(void)
     +{
    -+  struct replay_opts opts = REPLAY_OPTS_INIT;
     +  struct strbuf buf = STRBUF_INIT;
     +  const char *eol;
     +  const char *todo_path = git_path_todo_file();
    ++  int ret = 0;
     +
     +  if (strbuf_read_file(&buf, todo_path, 0) < 0) {
     +          if (errno == ENOENT) {
    -+                  return;
    ++                  return 0;
     +          } else {
     +                  error_errno("unable to open '%s'", todo_path);
    -+                  return;
    ++                  return 0;
     +          }
     +  }
     +  /* If there is only one line then we are done */
     +  eol = strchr(buf.buf, '\n');
     +  if (!eol || !eol[1])
    -+          sequencer_remove_state(&opts);
    ++          ret = 1;
     +
     +  strbuf_release(&buf);
    ++
    ++  return ret;
    ++}
    ++
    ++void sequencer_post_commit_cleanup(struct repository *r)
    ++{
    ++  struct replay_opts opts = REPLAY_OPTS_INIT;
    ++  int need_cleanup = 0;
    ++
    ++  if (file_exists(git_path_cherry_pick_head(r))) {
    ++          unlink(git_path_cherry_pick_head(r));
    ++          opts.action = REPLAY_PICK;
    ++          need_cleanup = 1;
    ++  }
    ++
    ++  if (file_exists(git_path_revert_head(r))) {
    ++          unlink(git_path_revert_head(r));
    ++          opts.action = REPLAY_REVERT;
    ++          need_cleanup = 1;
    ++  }
    ++
    ++  if (!need_cleanup)
    ++          return;
    ++
    ++  if (!have_finished_the_last_pick())
    ++          return;
    ++
    ++  sequencer_remove_state(&opts);
     +}
     +
      static int read_populate_todo(struct repository *r,
    @@ -106,7 +120,7 @@
      void parse_strategy_opts(struct replay_opts *opts, char *raw_opts);
      int write_basic_state(struct replay_opts *opts, const char *head_name,
                      const char *onto, const char *orig_head);
    -+void sequencer_post_commit_cleanup(void);
    ++void sequencer_post_commit_cleanup(struct repository *r);
     
      diff --git a/t/t3507-cherry-pick-conflict.sh 
b/t/t3507-cherry-pick-conflict.sh
      --- a/t/t3507-cherry-pick-conflict.sh
    @@ -115,7 +129,7 @@
      
        test_must_fail git rev-parse --verify CHERRY_PICK_HEAD
      '
    -+test_expect_success 'successful final commit clears sequencer state' '
    ++test_expect_success 'successful final commit clears cherry-pick state' '
     +  pristine_detach initial &&
     +
     +  test_must_fail git cherry-pick base picked-signed &&
    @@ -125,7 +139,7 @@
     +  test_must_fail test_path_exists .git/sequencer
     +'
     +
    -+test_expect_success 'reset after final pick clears sequencer state' '
    ++test_expect_success 'reset after final pick clears cherry-pick state' '
     +  pristine_detach initial &&
     +
     +  test_must_fail git cherry-pick base picked-signed &&
    @@ -137,3 +151,30 @@
      
      test_expect_success 'failed cherry-pick produces dirty index' '
        pristine_detach initial &&
    +@@
    +   test_cmp_rev picked REVERT_HEAD
    + '
    + 
    ++test_expect_success 'successful final commit clears revert state' '
    ++       pristine_detach picked-signed &&
    ++
    ++       test_must_fail git revert picked-signed base &&
    ++       echo resolved >foo &&
    ++       test_path_is_file .git/sequencer/todo &&
    ++       git commit -a &&
    ++       test_must_fail test_path_exists .git/sequencer
    ++'
    ++
    ++test_expect_success 'reset after final pick clears revert state' '
    ++       pristine_detach picked-signed &&
    ++
    ++       test_must_fail git revert picked-signed base &&
    ++       echo resolved >foo &&
    ++       test_path_is_file .git/sequencer/todo &&
    ++       git reset &&
    ++       test_must_fail test_path_exists .git/sequencer
    ++'
    ++
    + test_expect_success 'revert conflict, diff3 -m style' '
    +   pristine_detach initial &&
    +   git config merge.conflictstyle diff3 &&
2:  edb1bfb3d6 ! 2:  ee7db0cfe0 fix cherry-pick/revert status after commit
    @@ -2,9 +2,9 @@
     
         fix cherry-pick/revert status after commit
     
    -    If the user commits a conflict resolution using 'git commit' during a
    -    sequence of picks then 'git status' missed the fact that a
    -    cherry-pick/revert is still in progress.
    +    If the user commits a conflict resolution using `git commit` in the
    +    middle of a sequence of cherry-picks/reverts then `git status` missed
    +    the fact that a cherry-pick/revert is still in progress.
     
         Signed-off-by: Phillip Wood <phillip.w...@dunelm.org.uk>
     
    @@ -15,8 +15,7 @@
        return !item->commit;
      }
      
    -+int sequencer_get_last_command(struct repository *r, enum replay_action 
*action,
    -+                         struct object_id *oid)
    ++int sequencer_get_last_command(struct repository *r, enum replay_action 
*action)
     +{
     +  struct todo_item item;
     +  char *eol;
    @@ -43,7 +42,6 @@
     +  else
     +          goto fail;
     +
    -+  oidcpy(oid, &item.commit->object.oid);
     +  ret = 0;
     +
     + fail:
    @@ -62,9 +60,9 @@
     @@
      int write_basic_state(struct replay_opts *opts, const char *head_name,
                      const char *onto, const char *orig_head);
    - void sequencer_post_commit_cleanup(void);
    -+int sequencer_get_last_command(struct repository* r, enum replay_action 
*action,
    -+                         struct object_id *oid);
    + void sequencer_post_commit_cleanup(struct repository *r);
    ++int sequencer_get_last_command(struct repository* r,
    ++                         enum replay_action *action);
     
      diff --git a/t/t7512-status-help.sh b/t/t7512-status-help.sh
      --- a/t/t7512-status-help.sh
    @@ -77,13 +75,12 @@
     +  git reset --hard cherry_branch &&
     +  test_when_finished "git cherry-pick --abort" &&
     +  test_must_fail git cherry-pick cherry_branch_second one_cherry &&
    -+  TO_CHERRY_PICK=$(git rev-parse --short CHERRY_PICK_HEAD) &&
     +  echo end >main.txt &&
     +  git commit -a &&
     +  cat >expected <<EOF &&
     +On branch cherry_branch
    -+You are currently cherry-picking commit $TO_CHERRY_PICK.
    -+  (all conflicts fixed: run "git cherry-pick --continue")
    ++Cherry-pick currently in progress.
    ++  (run "git cherry-pick --continue" to continue)
     +  (use "git cherry-pick --abort" to cancel the cherry-pick operation)
     +
     +nothing to commit (use -u to show untracked files)
    @@ -95,6 +92,31 @@
      test_expect_success 'status showing detached at and from a tag' '
        test_commit atag tagging &&
        git checkout atag &&
    +@@
    +   test_i18ncmp expected actual
    + '
    + 
    ++test_expect_success 'status while reverting after committing conflict 
resolution' '
    ++  test_when_finished "git revert --abort" &&
    ++  git reset --hard new &&
    ++  test_must_fail git revert old new &&
    ++  echo reverted >to-revert.txt &&
    ++  git commit -a &&
    ++  cat >expected <<EOF &&
    ++On branch master
    ++Revert currently in progress.
    ++  (run "git revert --continue" to continue)
    ++  (use "git revert --abort" to cancel the revert operation)
    ++
    ++nothing to commit (use -u to show untracked files)
    ++EOF
    ++  git status --untracked-files=no >actual &&
    ++  test_i18ncmp expected actual
    ++'
    ++
    + test_expect_success 'prepare for different number of commits rebased' '
    +   git reset --hard master &&
    +   git checkout -b several_commits &&
     
      diff --git a/wt-status.c b/wt-status.c
      --- a/wt-status.c
    @@ -107,6 +129,55 @@
      
      static const char cut_line[] =
      "------------------------ >8 ------------------------\n";
    +@@
    + static void show_cherry_pick_in_progress(struct wt_status *s,
    +                                    const char *color)
    + {
    +-  status_printf_ln(s, color, _("You are currently cherry-picking commit 
%s."),
    +-                  find_unique_abbrev(&s->state.cherry_pick_head_oid, 
DEFAULT_ABBREV));
    ++  if (is_null_oid(&s->state.cherry_pick_head_oid))
    ++          status_printf_ln(s, color,
    ++                  _("Cherry-pick currently in progress."));
    ++  else
    ++          status_printf_ln(s, color,
    ++                  _("You are currently cherry-picking commit %s."),
    ++                  find_unique_abbrev(&s->state.cherry_pick_head_oid,
    ++                                     DEFAULT_ABBREV));
    ++
    +   if (s->hints) {
    +           if (has_unmerged(s))
    +                   status_printf_ln(s, color,
    +                           _("  (fix conflicts and run \"git cherry-pick 
--continue\")"));
    ++          else if (is_null_oid(&s->state.cherry_pick_head_oid))
    ++                  status_printf_ln(s, color,
    ++                          _("  (run \"git cherry-pick --continue\" to 
continue)"));
    +           else
    +                   status_printf_ln(s, color,
    +                           _("  (all conflicts fixed: run \"git 
cherry-pick --continue\")"));
    +@@
    + static void show_revert_in_progress(struct wt_status *s,
    +                               const char *color)
    + {
    +-  status_printf_ln(s, color, _("You are currently reverting commit %s."),
    +-                   find_unique_abbrev(&s->state.revert_head_oid, 
DEFAULT_ABBREV));
    ++  if (is_null_oid(&s->state.revert_head_oid))
    ++          status_printf_ln(s, color,
    ++                  _("Revert currently in progress."));
    ++  else
    ++          status_printf_ln(s, color,
    ++                  _("You are currently reverting commit %s."),
    ++                  find_unique_abbrev(&s->state.revert_head_oid,
    ++                                     DEFAULT_ABBREV));
    +   if (s->hints) {
    +           if (has_unmerged(s))
    +                   status_printf_ln(s, color,
    +                           _("  (fix conflicts and run \"git revert 
--continue\")"));
    ++          else if (is_null_oid(&s->state.revert_head_oid))
    ++                  status_printf_ln(s, color,
    ++                          _("  (run \"git revert --continue\" to 
continue)"));
    +           else
    +                   status_printf_ln(s, color,
    +                           _("  (all conflicts fixed: run \"git revert 
--continue\")"));
     @@
      {
        struct stat st;
    @@ -120,13 +191,13 @@
                oidcpy(&state->revert_head_oid, &oid);
        }
     -
    -+  if (!sequencer_get_last_command(r, &action, &oid)) {
    ++  if (!sequencer_get_last_command(r, &action)) {
     +          if (action == REPLAY_PICK) {
     +                  state->cherry_pick_in_progress = 1;
    -+                  oidcpy(&state->cherry_pick_head_oid, &oid);
    ++                  oidcpy(&state->cherry_pick_head_oid, &null_oid);
     +          } else {
     +                  state->revert_in_progress = 1;
    -+                  oidcpy(&state->revert_head_oid, &oid);
    ++                  oidcpy(&state->revert_head_oid, &null_oid);
     +          }
     +  }
        if (get_detached_from)
--
2.21.0

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