Merge branch 'bw/commit-partial-from-subdirectory-fix'
authorJunio C Hamano <gitster@pobox.com>
Wed, 25 Apr 2018 04:28:53 +0000 (13:28 +0900)
committerJunio C Hamano <gitster@pobox.com>
Wed, 25 Apr 2018 04:28:53 +0000 (13:28 +0900)
"cd sub/dir && git commit ../path" ought to record the changes to
the file "sub/path", but this regressed long time ago.

* bw/commit-partial-from-subdirectory-fix:
commit: allow partial commits with relative paths

1  2 
builtin/commit.c
diff --combined builtin/commit.c
index 37fcb55ab0a03a5fdabaca1913bc700201fd8e10,12a0995b3612cf8e8f2931d96769ac4dbfe84b75..5571d4a3e2be5ee8a71b7d5dba72b782c848f15e
@@@ -31,7 -31,9 +31,7 @@@
  #include "gpg-interface.h"
  #include "column.h"
  #include "sequencer.h"
 -#include "notes-utils.h"
  #include "mailmap.h"
 -#include "sigchain.h"
  
  static const char * const builtin_commit_usage[] = {
        N_("git commit [<options>] [--] <pathspec>..."),
@@@ -43,6 -45,31 +43,6 @@@ static const char * const builtin_statu
        NULL
  };
  
 -static const char implicit_ident_advice_noconfig[] =
 -N_("Your name and email address were configured automatically based\n"
 -"on your username and hostname. Please check that they are accurate.\n"
 -"You can suppress this message by setting them explicitly. Run the\n"
 -"following command and follow the instructions in your editor to edit\n"
 -"your configuration file:\n"
 -"\n"
 -"    git config --global --edit\n"
 -"\n"
 -"After doing this, you may fix the identity used for this commit with:\n"
 -"\n"
 -"    git commit --amend --reset-author\n");
 -
 -static const char implicit_ident_advice_config[] =
 -N_("Your name and email address were configured automatically based\n"
 -"on your username and hostname. Please check that they are accurate.\n"
 -"You can suppress this message by setting them explicitly:\n"
 -"\n"
 -"    git config --global user.name \"Your Name\"\n"
 -"    git config --global user.email you@example.com\n"
 -"\n"
 -"After doing this, you may fix the identity used for this commit with:\n"
 -"\n"
 -"    git commit --amend --reset-author\n");
 -
  static const char empty_amend_advice[] =
  N_("You asked to amend the most recent commit, but doing so would make\n"
  "it empty. You can repeat your command with --allow-empty, or you can\n"
@@@ -66,6 -93,8 +66,6 @@@ N_("If you wish to skip this commit, us
  "Then \"git cherry-pick --continue\" will resume cherry-picking\n"
  "the remaining commits.\n");
  
 -static GIT_PATH_FUNC(git_path_commit_editmsg, "COMMIT_EDITMSG")
 -
  static const char *use_message_buffer;
  static struct lock_file index_lock; /* real index */
  static struct lock_file false_lock; /* used only for partial commits */
@@@ -89,7 -118,7 +89,7 @@@ static int edit_flag = -1; /* unspecifi
  static int quiet, verbose, no_verify, allow_empty, dry_run, renew_authorship;
  static int config_commit_verbose = -1; /* unspecified */
  static int no_post_rewrite, allow_empty_message;
 -static char *untracked_files_arg, *force_date, *ignore_submodule_arg;
 +static char *untracked_files_arg, *force_date, *ignore_submodule_arg, *ignored_arg;
  static char *sign_commit;
  
  /*
   * if editor is used, and only the whitespaces if the message
   * is specified explicitly.
   */
 -static enum {
 -      CLEANUP_SPACE,
 -      CLEANUP_NONE,
 -      CLEANUP_SCISSORS,
 -      CLEANUP_ALL
 -} cleanup_mode;
 +static enum commit_msg_cleanup_mode cleanup_mode;
  static const char *cleanup_arg;
  
  static enum commit_whence whence;
  static int sequencer_in_use;
  static int use_editor = 1, include_status = 1;
 -static int show_ignored_in_status, have_option_m;
 +static int have_option_m;
  static struct strbuf message = STRBUF_INIT;
  
  static enum wt_status_format status_format = STATUS_FORMAT_UNSPECIFIED;
@@@ -161,6 -195,7 +161,6 @@@ static void determine_whence(struct wt_
  static void status_init_config(struct wt_status *s, config_fn_t fn)
  {
        wt_status_prepare(s);
 -      gitmodules_config();
        git_config(fn, s);
        determine_whence(s);
        init_diff_ui_defaults();
@@@ -218,8 -253,7 +218,7 @@@ static int list_paths(struct string_lis
  
        if (with_tree) {
                char *max_prefix = common_prefix(pattern);
-               overlay_tree_on_index(&the_index, with_tree,
-                                     max_prefix ? max_prefix : prefix);
+               overlay_tree_on_index(&the_index, with_tree, max_prefix);
                free(max_prefix);
        }
  
@@@ -301,7 -335,7 +300,7 @@@ static void refresh_cache_or_die(int re
  static const char *prepare_index(int argc, const char **argv, const char *prefix,
                                 const struct commit *current_head, int is_status)
  {
 -      struct string_list partial;
 +      struct string_list partial = STRING_LIST_INIT_DUP;
        struct pathspec pathspec;
        int refresh_flags = REFRESH_QUIET;
        const char *ret;
  
                refresh_cache_or_die(refresh_flags);
  
 -              if (write_locked_index(&the_index, &index_lock, CLOSE_LOCK))
 +              if (write_locked_index(&the_index, &index_lock, 0))
                        die(_("unable to create temporary index"));
  
                old_index_env = getenv(INDEX_ENVIRONMENT);
                if (update_main_cache_tree(WRITE_TREE_SILENT) == 0) {
                        if (reopen_lock_file(&index_lock) < 0)
                                die(_("unable to write index file"));
 -                      if (write_locked_index(&the_index, &index_lock, CLOSE_LOCK))
 +                      if (write_locked_index(&the_index, &index_lock, 0))
                                die(_("unable to update temporary index"));
                } else
                        warning(_("Failed to update main cache tree"));
  
                commit_style = COMMIT_NORMAL;
 -              return get_lock_file_path(&index_lock);
 +              ret = get_lock_file_path(&index_lock);
 +              goto out;
        }
  
        /*
                add_files_to_cache(also ? prefix : NULL, &pathspec, 0);
                refresh_cache_or_die(refresh_flags);
                update_main_cache_tree(WRITE_TREE_SILENT);
 -              if (write_locked_index(&the_index, &index_lock, CLOSE_LOCK))
 +              if (write_locked_index(&the_index, &index_lock, 0))
                        die(_("unable to write new_index file"));
                commit_style = COMMIT_NORMAL;
 -              return get_lock_file_path(&index_lock);
 +              ret = get_lock_file_path(&index_lock);
 +              goto out;
        }
  
        /*
                if (active_cache_changed
                    || !cache_tree_fully_valid(active_cache_tree))
                        update_main_cache_tree(WRITE_TREE_SILENT);
 -              if (active_cache_changed) {
 -                      if (write_locked_index(&the_index, &index_lock,
 -                                             COMMIT_LOCK))
 -                              die(_("unable to write new_index file"));
 -              } else {
 -                      rollback_lock_file(&index_lock);
 -              }
 +              if (write_locked_index(&the_index, &index_lock,
 +                                     COMMIT_LOCK | SKIP_IF_UNCHANGED))
 +                      die(_("unable to write new_index file"));
                commit_style = COMMIT_AS_IS;
 -              return get_index_file();
 +              ret = get_index_file();
 +              goto out;
        }
  
        /*
                        die(_("cannot do a partial commit during a cherry-pick."));
        }
  
 -      string_list_init(&partial, 1);
        if (list_paths(&partial, !current_head ? NULL : "HEAD", prefix, &pathspec))
                exit(1);
  
        add_remove_files(&partial);
        refresh_cache(REFRESH_QUIET);
        update_main_cache_tree(WRITE_TREE_SILENT);
 -      if (write_locked_index(&the_index, &index_lock, CLOSE_LOCK))
 +      if (write_locked_index(&the_index, &index_lock, 0))
                die(_("unable to write new_index file"));
  
        hold_lock_file_for_update(&false_lock,
        add_remove_files(&partial);
        refresh_cache(REFRESH_QUIET);
  
 -      if (write_locked_index(&the_index, &false_lock, CLOSE_LOCK))
 +      if (write_locked_index(&the_index, &false_lock, 0))
                die(_("unable to write temporary index file"));
  
        discard_cache();
        ret = get_lock_file_path(&false_lock);
        read_cache_from(ret);
 +out:
 +      string_list_clear(&partial, 0);
 +      clear_pathspec(&pathspec);
        return ret;
  }
  
@@@ -476,7 -509,7 +475,7 @@@ static int run_status(FILE *fp, const c
        s->index_file = index_file;
        s->fp = fp;
        s->nowarn = nowarn;
 -      s->is_initial = get_sha1(s->reference, oid.hash) ? 1 : 0;
 +      s->is_initial = get_oid(s->reference, &oid) ? 1 : 0;
        if (!s->is_initial)
                hashcpy(s->sha1_commit, oid.hash);
        s->status_format = status_format;
@@@ -635,7 -668,7 +634,7 @@@ static int prepare_to_commit(const cha
        struct strbuf sb = STRBUF_INIT;
        const char *hook_arg1 = NULL;
        const char *hook_arg2 = NULL;
 -      int clean_message_contents = (cleanup_mode != CLEANUP_NONE);
 +      int clean_message_contents = (cleanup_mode != COMMIT_MSG_CLEANUP_NONE);
        int old_display_comment_prefix;
  
        /* This checks and barfs if author is badly specified */
                }
        }
  
 -      if (have_option_m) {
 +      if (have_option_m && !fixup_message) {
                strbuf_addbuf(&sb, &message);
                hook_arg1 = "message";
        } else if (logfile && !strcmp(logfile, "-")) {
                ctx.output_encoding = get_commit_output_encoding();
                format_commit_message(commit, "fixup! %s\n\n",
                                      &sb, &ctx);
 +              if (have_option_m)
 +                      strbuf_addbuf(&sb, &message);
                hook_arg1 = "message";
        } else if (!stat(git_path_merge_msg(), &statbuf)) {
                /*
                struct ident_split ci, ai;
  
                if (whence != FROM_COMMIT) {
 -                      if (cleanup_mode == CLEANUP_SCISSORS)
 +                      if (cleanup_mode == COMMIT_MSG_CLEANUP_SCISSORS)
                                wt_status_add_cut_line(s->fp);
                        status_printf_ln(s, GIT_COLOR_NORMAL,
                            whence == FROM_MERGE
                }
  
                fprintf(s->fp, "\n");
 -              if (cleanup_mode == CLEANUP_ALL)
 +              if (cleanup_mode == COMMIT_MSG_CLEANUP_ALL)
                        status_printf(s, GIT_COLOR_NORMAL,
                                _("Please enter the commit message for your changes."
                                  " Lines starting\nwith '%c' will be ignored, and an empty"
                                  " message aborts the commit.\n"), comment_line_char);
 -              else if (cleanup_mode == CLEANUP_SCISSORS && whence == FROM_COMMIT)
 +              else if (cleanup_mode == COMMIT_MSG_CLEANUP_SCISSORS &&
 +                       whence == FROM_COMMIT)
                        wt_status_add_cut_line(s->fp);
 -              else /* CLEANUP_SPACE, that is. */
 +              else /* COMMIT_MSG_CLEANUP_SPACE, that is. */
                        status_printf(s, GIT_COLOR_NORMAL,
                                _("Please enter the commit message for your changes."
                                  " Lines starting\n"
                if (amend)
                        parent = "HEAD^1";
  
 -              if (get_sha1(parent, oid.hash)) {
 +              if (get_oid(parent, &oid)) {
                        int i, ita_nr = 0;
  
                        for (i = 0; i < active_nr; i++)
                         * submodules which were manually staged, which would
                         * be really confusing.
                         */
 -                      int diff_flags = DIFF_OPT_OVERRIDE_SUBMODULE_CONFIG;
 +                      struct diff_flags flags = DIFF_FLAGS_INIT;
 +                      flags.override_submodule_config = 1;
                        if (ignore_submodule_arg &&
                            !strcmp(ignore_submodule_arg, "all"))
 -                              diff_flags |= DIFF_OPT_IGNORE_SUBMODULES;
 -                      commitable = index_differs_from(parent, diff_flags, 1);
 +                              flags.ignore_submodules = 1;
 +                      commitable = index_differs_from(parent, &flags, 1);
                }
        }
        strbuf_release(&committer_ident);
                return 0;
        }
  
 -      /*
 -       * Re-read the index as pre-commit hook could have updated it,
 -       * and write it out as a tree.  We must do this before we invoke
 -       * the editor and after we invoke run_status above.
 -       */
 -      discard_cache();
 +      if (!no_verify && find_hook("pre-commit")) {
 +              /*
 +               * Re-read the index as pre-commit hook could have updated it,
 +               * and write it out as a tree.  We must do this before we invoke
 +               * the editor and after we invoke run_status above.
 +               */
 +              discard_cache();
 +      }
        read_cache_from(index_file);
 +
        if (update_main_cache_tree(0)) {
                error(_("Error building trees"));
                return 0;
        return 1;
  }
  
 -static int rest_is_empty(struct strbuf *sb, int start)
 -{
 -      int i, eol;
 -      const char *nl;
 -
 -      /* Check if the rest is just whitespace and Signed-off-by's. */
 -      for (i = start; i < sb->len; i++) {
 -              nl = memchr(sb->buf + i, '\n', sb->len - i);
 -              if (nl)
 -                      eol = nl - sb->buf;
 -              else
 -                      eol = sb->len;
 -
 -              if (strlen(sign_off_header) <= eol - i &&
 -                  starts_with(sb->buf + i, sign_off_header)) {
 -                      i = eol;
 -                      continue;
 -              }
 -              while (i < eol)
 -                      if (!isspace(sb->buf[i++]))
 -                              return 0;
 -      }
 -
 -      return 1;
 -}
 -
 -/*
 - * Find out if the message in the strbuf contains only whitespace and
 - * Signed-off-by lines.
 - */
 -static int message_is_empty(struct strbuf *sb)
 -{
 -      if (cleanup_mode == CLEANUP_NONE && sb->len)
 -              return 0;
 -      return rest_is_empty(sb, 0);
 -}
 -
 -/*
 - * See if the user edited the message in the editor or left what
 - * was in the template intact
 - */
 -static int template_untouched(struct strbuf *sb)
 -{
 -      struct strbuf tmpl = STRBUF_INIT;
 -      const char *start;
 -
 -      if (cleanup_mode == CLEANUP_NONE && sb->len)
 -              return 0;
 -
 -      if (!template_file || strbuf_read_file(&tmpl, template_file, 0) <= 0)
 -              return 0;
 -
 -      strbuf_stripspace(&tmpl, cleanup_mode == CLEANUP_ALL);
 -      if (!skip_prefix(sb->buf, tmpl.buf, &start))
 -              start = sb->buf;
 -      strbuf_release(&tmpl);
 -      return rest_is_empty(sb, start - sb->buf);
 -}
 -
  static const char *find_author_by_nickname(const char *name)
  {
        struct rev_info revs;
        die(_("--author '%s' is not 'Name <email>' and matches no existing author"), name);
  }
  
 +static void handle_ignored_arg(struct wt_status *s)
 +{
 +      if (!ignored_arg)
 +              ; /* default already initialized */
 +      else if (!strcmp(ignored_arg, "traditional"))
 +              s->show_ignored_mode = SHOW_TRADITIONAL_IGNORED;
 +      else if (!strcmp(ignored_arg, "no"))
 +              s->show_ignored_mode = SHOW_NO_IGNORED;
 +      else if (!strcmp(ignored_arg, "matching"))
 +              s->show_ignored_mode = SHOW_MATCHING_IGNORED;
 +      else
 +              die(_("Invalid ignored mode '%s'"), ignored_arg);
 +}
  
  static void handle_untracked_files_arg(struct wt_status *s)
  {
@@@ -1057,9 -1129,6 +1056,9 @@@ static void finalize_deferred_config(st
                s->show_branch = status_deferred_config.show_branch;
        if (s->show_branch < 0)
                s->show_branch = 0;
 +
 +      if (s->ahead_behind_flags == AHEAD_BEHIND_UNSPECIFIED)
 +              s->ahead_behind_flags = AHEAD_BEHIND_FULL;
  }
  
  static int parse_and_validate_options(int argc, const char *argv[],
                f++;
        if (f > 1)
                die(_("Only one of -c/-C/-F/--fixup can be used."));
 -      if (have_option_m && f > 0)
 -              die((_("Option -m cannot be combined with -c/-C/-F/--fixup.")));
 +      if (have_option_m && (edit_message || use_message || logfile))
 +              die((_("Option -m cannot be combined with -c/-C/-F.")));
        if (f || have_option_m)
                template_file = NULL;
        if (edit_message)
        if (argc == 0 && (also || (only && !amend && !allow_empty)))
                die(_("No paths with --include/--only does not make sense."));
        if (!cleanup_arg || !strcmp(cleanup_arg, "default"))
 -              cleanup_mode = use_editor ? CLEANUP_ALL : CLEANUP_SPACE;
 +              cleanup_mode = use_editor ? COMMIT_MSG_CLEANUP_ALL :
 +                                          COMMIT_MSG_CLEANUP_SPACE;
        else if (!strcmp(cleanup_arg, "verbatim"))
 -              cleanup_mode = CLEANUP_NONE;
 +              cleanup_mode = COMMIT_MSG_CLEANUP_NONE;
        else if (!strcmp(cleanup_arg, "whitespace"))
 -              cleanup_mode = CLEANUP_SPACE;
 +              cleanup_mode = COMMIT_MSG_CLEANUP_SPACE;
        else if (!strcmp(cleanup_arg, "strip"))
 -              cleanup_mode = CLEANUP_ALL;
 +              cleanup_mode = COMMIT_MSG_CLEANUP_ALL;
        else if (!strcmp(cleanup_arg, "scissors"))
 -              cleanup_mode = use_editor ? CLEANUP_SCISSORS : CLEANUP_SPACE;
 +              cleanup_mode = use_editor ? COMMIT_MSG_CLEANUP_SCISSORS :
 +                                          COMMIT_MSG_CLEANUP_SPACE;
        else
                die(_("Invalid cleanup mode %s"), cleanup_arg);
  
@@@ -1276,8 -1343,6 +1275,8 @@@ int cmd_status(int argc, const char **a
                         N_("show branch information")),
                OPT_BOOL(0, "show-stash", &s.show_stash,
                         N_("show stash information")),
 +              OPT_BOOL(0, "ahead-behind", &s.ahead_behind_flags,
 +                       N_("compute full ahead/behind values")),
                { OPTION_CALLBACK, 0, "porcelain", &status_format,
                  N_("version"), N_("machine-readable output"),
                  PARSE_OPT_OPTARG, opt_parse_porcelain },
                  N_("mode"),
                  N_("show untracked files, optional modes: all, normal, no. (Default: all)"),
                  PARSE_OPT_OPTARG, NULL, (intptr_t)"all" },
 -              OPT_BOOL(0, "ignored", &show_ignored_in_status,
 -                       N_("show ignored files")),
 +              { OPTION_STRING, 0, "ignored", &ignored_arg,
 +                N_("mode"),
 +                N_("show ignored files, optional modes: traditional, matching, no. (Default: traditional)"),
 +                PARSE_OPT_OPTARG, NULL, (intptr_t)"traditional" },
                { OPTION_STRING, 0, "ignore-submodules", &ignore_submodule_arg, N_("when"),
                  N_("ignore changes to submodules, optional when: all, dirty, untracked. (Default: all)"),
                  PARSE_OPT_OPTARG, NULL, (intptr_t)"all" },
        finalize_deferred_config(&s);
  
        handle_untracked_files_arg(&s);
 -      if (show_ignored_in_status)
 -              s.show_ignored_files = 1;
 +      handle_ignored_arg(&s);
 +
 +      if (s.show_ignored_mode == SHOW_MATCHING_IGNORED &&
 +          s.show_untracked_files == SHOW_NO_UNTRACKED_FILES)
 +              die(_("Unsupported combination of ignored and untracked-files arguments"));
 +
        parse_pathspec(&s.pathspec, 0,
                       PATHSPEC_PREFER_FULL,
                       prefix, argv);
        read_cache_preload(&s.pathspec);
        refresh_index(&the_index, REFRESH_QUIET|REFRESH_UNMERGED, &s.pathspec, NULL, NULL);
  
 -      fd = hold_locked_index(&index_lock, 0);
 +      if (use_optional_locks())
 +              fd = hold_locked_index(&index_lock, 0);
 +      else
 +              fd = -1;
  
 -      s.is_initial = get_sha1(s.reference, oid.hash) ? 1 : 0;
 +      s.is_initial = get_oid(s.reference, &oid) ? 1 : 0;
        if (!s.is_initial)
                hashcpy(s.sha1_commit, oid.hash);
  
        return 0;
  }
  
 -static const char *implicit_ident_advice(void)
 -{
 -      char *user_config = expand_user_path("~/.gitconfig", 0);
 -      char *xdg_config = xdg_config_home("config");
 -      int config_exists = file_exists(user_config) || file_exists(xdg_config);
 -
 -      free(user_config);
 -      free(xdg_config);
 -
 -      if (config_exists)
 -              return _(implicit_ident_advice_config);
 -      else
 -              return _(implicit_ident_advice_noconfig);
 -
 -}
 -
 -static void print_summary(const char *prefix, const struct object_id *oid,
 -                        int initial_commit)
 -{
 -      struct rev_info rev;
 -      struct commit *commit;
 -      struct strbuf format = STRBUF_INIT;
 -      struct object_id junk_oid;
 -      const char *head;
 -      struct pretty_print_context pctx = {0};
 -      struct strbuf author_ident = STRBUF_INIT;
 -      struct strbuf committer_ident = STRBUF_INIT;
 -
 -      commit = lookup_commit(oid);
 -      if (!commit)
 -              die(_("couldn't look up newly created commit"));
 -      if (parse_commit(commit))
 -              die(_("could not parse newly created commit"));
 -
 -      strbuf_addstr(&format, "format:%h] %s");
 -
 -      format_commit_message(commit, "%an <%ae>", &author_ident, &pctx);
 -      format_commit_message(commit, "%cn <%ce>", &committer_ident, &pctx);
 -      if (strbuf_cmp(&author_ident, &committer_ident)) {
 -              strbuf_addstr(&format, "\n Author: ");
 -              strbuf_addbuf_percentquote(&format, &author_ident);
 -      }
 -      if (author_date_is_interesting()) {
 -              struct strbuf date = STRBUF_INIT;
 -              format_commit_message(commit, "%ad", &date, &pctx);
 -              strbuf_addstr(&format, "\n Date: ");
 -              strbuf_addbuf_percentquote(&format, &date);
 -              strbuf_release(&date);
 -      }
 -      if (!committer_ident_sufficiently_given()) {
 -              strbuf_addstr(&format, "\n Committer: ");
 -              strbuf_addbuf_percentquote(&format, &committer_ident);
 -              if (advice_implicit_identity) {
 -                      strbuf_addch(&format, '\n');
 -                      strbuf_addstr(&format, implicit_ident_advice());
 -              }
 -      }
 -      strbuf_release(&author_ident);
 -      strbuf_release(&committer_ident);
 -
 -      init_revisions(&rev, prefix);
 -      setup_revisions(0, NULL, &rev, NULL);
 -
 -      rev.diff = 1;
 -      rev.diffopt.output_format =
 -              DIFF_FORMAT_SHORTSTAT | DIFF_FORMAT_SUMMARY;
 -
 -      rev.verbose_header = 1;
 -      rev.show_root_diff = 1;
 -      get_commit_format(format.buf, &rev);
 -      rev.always_show_header = 0;
 -      rev.diffopt.detect_rename = 1;
 -      rev.diffopt.break_opt = 0;
 -      diff_setup_done(&rev.diffopt);
 -
 -      head = resolve_ref_unsafe("HEAD", 0, junk_oid.hash, NULL);
 -      if (!strcmp(head, "HEAD"))
 -              head = _("detached HEAD");
 -      else
 -              skip_prefix(head, "refs/heads/", &head);
 -      printf("[%s%s ", head, initial_commit ? _(" (root-commit)") : "");
 -
 -      if (!log_tree_commit(&rev, commit)) {
 -              rev.always_show_header = 1;
 -              rev.use_terminator = 1;
 -              log_tree_commit(&rev, commit);
 -      }
 -
 -      strbuf_release(&format);
 -}
 -
  static int git_commit_config(const char *k, const char *v, void *cb)
  {
        struct wt_status *s = cb;
        return git_status_config(k, v, s);
  }
  
 -static int run_rewrite_hook(const struct object_id *oldoid,
 -                          const struct object_id *newoid)
 -{
 -      struct child_process proc = CHILD_PROCESS_INIT;
 -      const char *argv[3];
 -      int code;
 -      struct strbuf sb = STRBUF_INIT;
 -
 -      argv[0] = find_hook("post-rewrite");
 -      if (!argv[0])
 -              return 0;
 -
 -      argv[1] = "amend";
 -      argv[2] = NULL;
 -
 -      proc.argv = argv;
 -      proc.in = -1;
 -      proc.stdout_to_stderr = 1;
 -
 -      code = start_command(&proc);
 -      if (code)
 -              return code;
 -      strbuf_addf(&sb, "%s %s\n", oid_to_hex(oldoid), oid_to_hex(newoid));
 -      sigchain_push(SIGPIPE, SIG_IGN);
 -      write_in_full(proc.in, sb.buf, sb.len);
 -      close(proc.in);
 -      strbuf_release(&sb);
 -      sigchain_pop(SIGPIPE);
 -      return finish_command(&proc);
 -}
 -
  int run_commit_hook(int editor_is_used, const char *index_file, const char *name, ...)
  {
        struct argv_array hook_env = ARGV_ARRAY_INIT;
  
  int cmd_commit(int argc, const char **argv, const char *prefix)
  {
 +      const char *argv_gc_auto[] = {"gc", "--auto", NULL};
        static struct wt_status s;
        static struct option builtin_commit_options[] = {
                OPT__QUIET(&quiet, N_("suppress summary after successful commit")),
                OPT_SET_INT(0, "short", &status_format, N_("show status concisely"),
                            STATUS_FORMAT_SHORT),
                OPT_BOOL(0, "branch", &s.show_branch, N_("show branch information")),
 +              OPT_BOOL(0, "ahead-behind", &s.ahead_behind_flags,
 +                       N_("compute full ahead/behind values")),
                OPT_SET_INT(0, "porcelain", &status_format,
                            N_("machine-readable output"), STATUS_FORMAT_PORCELAIN),
                OPT_SET_INT(0, "long", &status_format,
        struct strbuf sb = STRBUF_INIT;
        struct strbuf author_ident = STRBUF_INIT;
        const char *index_file, *reflog_msg;
 -      char *nl;
        struct object_id oid;
        struct commit_list *parents = NULL;
        struct stat statbuf;
        struct commit *current_head = NULL;
        struct commit_extra_header *extra = NULL;
 -      struct ref_transaction *transaction;
        struct strbuf err = STRBUF_INIT;
  
        if (argc == 2 && !strcmp(argv[1], "-h"))
        status_format = STATUS_FORMAT_NONE; /* Ignore status.short */
        s.colopts = 0;
  
 -      if (get_sha1("HEAD", oid.hash))
 +      if (get_oid("HEAD", &oid))
                current_head = NULL;
        else {
                current_head = lookup_commit_or_die(&oid, "HEAD");
                                allow_fast_forward = 0;
                }
                if (allow_fast_forward)
 -                      parents = reduce_heads(parents);
 +                      reduce_heads_replace(&parents);
        } else {
                if (!reflog_msg)
                        reflog_msg = (whence == FROM_CHERRY_PICK)
        }
  
        if (verbose || /* Truncate the message just before the diff, if any. */
 -          cleanup_mode == CLEANUP_SCISSORS)
 +          cleanup_mode == COMMIT_MSG_CLEANUP_SCISSORS)
                strbuf_setlen(&sb, wt_status_locate_end(sb.buf, sb.len));
 -      if (cleanup_mode != CLEANUP_NONE)
 -              strbuf_stripspace(&sb, cleanup_mode == CLEANUP_ALL);
 +      if (cleanup_mode != COMMIT_MSG_CLEANUP_NONE)
 +              strbuf_stripspace(&sb, cleanup_mode == COMMIT_MSG_CLEANUP_ALL);
  
 -      if (message_is_empty(&sb) && !allow_empty_message) {
 +      if (message_is_empty(&sb, cleanup_mode) && !allow_empty_message) {
                rollback_index_files();
                fprintf(stderr, _("Aborting commit due to empty commit message.\n"));
                exit(1);
        }
 -      if (template_untouched(&sb) && !allow_empty_message) {
 +      if (template_untouched(&sb, template_file, cleanup_mode) && !allow_empty_message) {
                rollback_index_files();
                fprintf(stderr, _("Aborting commit; you did not edit the message.\n"));
                exit(1);
                append_merge_tag_headers(parents, &tail);
        }
  
 -      if (commit_tree_extended(sb.buf, sb.len, active_cache_tree->oid.hash,
 -                       parents, oid.hash, author_ident.buf, sign_commit, extra)) {
 +      if (commit_tree_extended(sb.buf, sb.len, &active_cache_tree->oid,
 +                               parents, &oid, author_ident.buf, sign_commit,
 +                               extra)) {
                rollback_index_files();
                die(_("failed to write commit object"));
        }
        strbuf_release(&author_ident);
        free_commit_extra_headers(extra);
  
 -      nl = strchr(sb.buf, '\n');
 -      if (nl)
 -              strbuf_setlen(&sb, nl + 1 - sb.buf);
 -      else
 -              strbuf_addch(&sb, '\n');
 -      strbuf_insert(&sb, 0, reflog_msg, strlen(reflog_msg));
 -      strbuf_insert(&sb, strlen(reflog_msg), ": ", 2);
 -
 -      transaction = ref_transaction_begin(&err);
 -      if (!transaction ||
 -          ref_transaction_update(transaction, "HEAD", oid.hash,
 -                                 current_head
 -                                 ? current_head->object.oid.hash : null_sha1,
 -                                 0, sb.buf, &err) ||
 -          ref_transaction_commit(transaction, &err)) {
 +      if (update_head_with_reflog(current_head, &oid, reflog_msg, &sb,
 +                                  &err)) {
                rollback_index_files();
                die("%s", err.buf);
        }
 -      ref_transaction_free(transaction);
  
        unlink(git_path_cherry_pick_head());
        unlink(git_path_revert_head());
                     "not exceeded, and then \"git reset HEAD\" to recover."));
  
        rerere(0);
 +      run_command_v_opt(argv_gc_auto, RUN_GIT_CMD);
        run_commit_hook(use_editor, get_index_file(), "post-commit", NULL);
        if (amend && !no_post_rewrite) {
 -              struct notes_rewrite_cfg *cfg;
 -              cfg = init_copy_notes_for_rewrite("amend");
 -              if (cfg) {
 -                      /* we are amending, so current_head is not NULL */
 -                      copy_note_for_rewrite(cfg, &current_head->object.oid, &oid);
 -                      finish_copy_notes_for_rewrite(cfg, "Notes added by 'git commit --amend'");
 -              }
 -              run_rewrite_hook(&current_head->object.oid, &oid);
 +              commit_post_rewrite(current_head, &oid);
 +      }
 +      if (!quiet) {
 +              unsigned int flags = 0;
 +
 +              if (!current_head)
 +                      flags |= SUMMARY_INITIAL_COMMIT;
 +              if (author_date_is_interesting())
 +                      flags |= SUMMARY_SHOW_AUTHOR_DATE;
 +              print_commit_summary(prefix, &oid, flags);
        }
 -      if (!quiet)
 -              print_summary(prefix, &oid, !current_head);
  
 -      strbuf_release(&err);
 +      UNLEAK(err);
 +      UNLEAK(sb);
        return 0;
  }