Merge branch 'cb/openbsd-allows-reading-directory'
[gitweb.git] / builtin / commit.c
index 4610e3d8e3e04a70678a102cc3e0e7472089a3cf..004b816635bf1628bfe7697f737a22cbcd27622b 100644 (file)
 #include "gpg-interface.h"
 #include "column.h"
 #include "sequencer.h"
-#include "notes-utils.h"
 #include "mailmap.h"
-#include "sigchain.h"
+#include "help.h"
+#include "commit-reach.h"
+#include "commit-graph.h"
 
 static const char * const builtin_commit_usage[] = {
        N_("git commit [<options>] [--] <pathspec>..."),
@@ -45,31 +46,6 @@ static const char * const builtin_status_usage[] = {
        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"
@@ -93,7 +69,17 @@ N_("If you wish to skip this commit, use:\n"
 "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 *color_status_slots[] = {
+       [WT_STATUS_HEADER]        = "header",
+       [WT_STATUS_UPDATED]       = "updated",
+       [WT_STATUS_CHANGED]       = "changed",
+       [WT_STATUS_UNTRACKED]     = "untracked",
+       [WT_STATUS_NOBRANCH]      = "noBranch",
+       [WT_STATUS_UNMERGED]      = "unmerged",
+       [WT_STATUS_LOCAL_BRANCH]  = "localBranch",
+       [WT_STATUS_REMOTE_BRANCH] = "remoteBranch",
+       [WT_STATUS_ONBRANCH]      = "branch",
+};
 
 static const char *use_message_buffer;
 static struct lock_file index_lock; /* real index */
@@ -128,12 +114,7 @@ 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;
@@ -177,11 +158,24 @@ static int opt_parse_m(const struct option *opt, const char *arg, int unset)
        return 0;
 }
 
+static int opt_parse_rename_score(const struct option *opt, const char *arg, int unset)
+{
+       const char **value = opt->value;
+
+       BUG_ON_OPT_NEG(unset);
+
+       if (arg != NULL && *arg == '=')
+               arg = arg + 1;
+
+       *value = arg;
+       return 0;
+}
+
 static void determine_whence(struct wt_status *s)
 {
-       if (file_exists(git_path_merge_head()))
+       if (file_exists(git_path_merge_head(the_repository)))
                whence = FROM_MERGE;
-       else if (file_exists(git_path_cherry_pick_head())) {
+       else if (file_exists(git_path_cherry_pick_head(the_repository))) {
                whence = FROM_CHERRY_PICK;
                if (file_exists(git_path_seq_dir()))
                        sequencer_in_use = 1;
@@ -194,10 +188,10 @@ static void determine_whence(struct wt_status *s)
 
 static void status_init_config(struct wt_status *s, config_fn_t fn)
 {
-       wt_status_prepare(s);
+       wt_status_prepare(the_repository, s);
+       init_diff_ui_defaults();
        git_config(fn, s);
        determine_whence(s);
-       init_diff_ui_defaults();
        s->hints = advice_status_hints; /* must come after git_config() */
 }
 
@@ -252,8 +246,7 @@ static int list_paths(struct string_list *list, const char *with_tree,
 
        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);
        }
 
@@ -263,7 +256,7 @@ static int list_paths(struct string_list *list, const char *with_tree,
 
                if (ce->ce_flags & CE_UPDATE)
                        continue;
-               if (!ce_path_match(ce, pattern, m))
+               if (!ce_path_match(&the_index, ce, pattern, m))
                        continue;
                item = string_list_insert(list, ce->name);
                if (ce_skip_worktree(ce))
@@ -423,13 +416,9 @@ static const char *prepare_index(int argc, const char **argv, const char *prefix
                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;
                ret = get_index_file();
                goto out;
@@ -522,8 +511,9 @@ static int run_status(FILE *fp, const char *index_file, const char *prefix, int
 
        wt_status_collect(s);
        wt_status_print(s);
+       wt_status_collect_free_buffers(s);
 
-       return s->commitable;
+       return s->committable;
 }
 
 static int is_a_merge(const struct commit *current_head)
@@ -534,7 +524,7 @@ static int is_a_merge(const struct commit *current_head)
 static void assert_split_ident(struct ident_split *id, const struct strbuf *buf)
 {
        if (split_ident_line(id, buf->buf, buf->len) || !id->date_begin)
-               die("BUG: unable to parse our own ident: %s", buf->buf);
+               BUG("unable to parse our own ident: %s", buf->buf);
 }
 
 static void export_one(const char *var, const char *s, const char *e, int hack)
@@ -669,11 +659,11 @@ static int prepare_to_commit(const char *index_file, const char *prefix,
 {
        struct stat statbuf;
        struct strbuf committer_ident = STRBUF_INIT;
-       int commitable;
+       int committable;
        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 */
@@ -734,21 +724,21 @@ static int prepare_to_commit(const char *index_file, const char *prefix,
                if (have_option_m)
                        strbuf_addbuf(&sb, &message);
                hook_arg1 = "message";
-       } else if (!stat(git_path_merge_msg(), &statbuf)) {
+       } else if (!stat(git_path_merge_msg(the_repository), &statbuf)) {
                /*
                 * prepend SQUASH_MSG here if it exists and a
                 * "merge --squash" was originally performed
                 */
-               if (!stat(git_path_squash_msg(), &statbuf)) {
-                       if (strbuf_read_file(&sb, git_path_squash_msg(), 0) < 0)
+               if (!stat(git_path_squash_msg(the_repository), &statbuf)) {
+                       if (strbuf_read_file(&sb, git_path_squash_msg(the_repository), 0) < 0)
                                die_errno(_("could not read SQUASH_MSG"));
                        hook_arg1 = "squash";
                } else
                        hook_arg1 = "merge";
-               if (strbuf_read_file(&sb, git_path_merge_msg(), 0) < 0)
+               if (strbuf_read_file(&sb, git_path_merge_msg(the_repository), 0) < 0)
                        die_errno(_("could not read MERGE_MSG"));
-       } else if (!stat(git_path_squash_msg(), &statbuf)) {
-               if (strbuf_read_file(&sb, git_path_squash_msg(), 0) < 0)
+       } else if (!stat(git_path_squash_msg(the_repository), &statbuf)) {
+               if (strbuf_read_file(&sb, git_path_squash_msg(the_repository), 0) < 0)
                        die_errno(_("could not read SQUASH_MSG"));
                hook_arg1 = "squash";
        } else if (template_file) {
@@ -814,7 +804,7 @@ static int prepare_to_commit(const char *index_file, const char *prefix,
                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
@@ -829,19 +819,20 @@ static int prepare_to_commit(const char *index_file, const char *prefix,
                                        "       %s\n"
                                        "and try again.\n"),
                                whence == FROM_MERGE ?
-                                       git_path_merge_head() :
-                                       git_path_cherry_pick_head());
+                                       git_path_merge_head(the_repository) :
+                                       git_path_cherry_pick_head(the_repository));
                }
 
                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"
@@ -885,8 +876,9 @@ static int prepare_to_commit(const char *index_file, const char *prefix,
 
                saved_color_setting = s->use_color;
                s->use_color = 0;
-               commitable = run_status(s->fp, index_file, prefix, 1, s);
+               committable = run_status(s->fp, index_file, prefix, 1, s);
                s->use_color = saved_color_setting;
+               string_list_clear(&s->change, 1);
        } else {
                struct object_id oid;
                const char *parent = "HEAD";
@@ -903,7 +895,7 @@ static int prepare_to_commit(const char *index_file, const char *prefix,
                        for (i = 0; i < active_nr; i++)
                                if (ce_intent_to_add(active_cache[i]))
                                        ita_nr++;
-                       commitable = active_nr - ita_nr > 0;
+                       committable = active_nr - ita_nr > 0;
                } else {
                        /*
                         * Unless the user did explicitly request a submodule
@@ -919,7 +911,8 @@ static int prepare_to_commit(const char *index_file, const char *prefix,
                        if (ignore_submodule_arg &&
                            !strcmp(ignore_submodule_arg, "all"))
                                flags.ignore_submodules = 1;
-                       commitable = index_differs_from(parent, &flags, 1);
+                       committable = index_differs_from(the_repository,
+                                                        parent, &flags, 1);
                }
        }
        strbuf_release(&committer_ident);
@@ -931,7 +924,7 @@ static int prepare_to_commit(const char *index_file, const char *prefix,
         * explicit --allow-empty. In the cherry-pick case, it may be
         * empty due to conflict resolution, which the user should okay.
         */
-       if (!commitable && whence != FROM_MERGE && !allow_empty &&
+       if (!committable && whence != FROM_MERGE && !allow_empty &&
            !(amend && is_a_merge(current_head))) {
                s->display_comment_prefix = old_display_comment_prefix;
                run_status(stdout, index_file, prefix, 0, s);
@@ -986,65 +979,6 @@ static int prepare_to_commit(const char *index_file, const char *prefix,
        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;
@@ -1054,7 +988,7 @@ static const char *find_author_by_nickname(const char *name)
        const char *av[20];
        int ac = 0;
 
-       init_revisions(&revs, NULL);
+       repo_init_revisions(the_repository, &revs, NULL);
        strbuf_addf(&buf, "--author=%s", name);
        av[++ac] = "--all";
        av[++ac] = "-i";
@@ -1153,6 +1087,9 @@ static void finalize_deferred_config(struct wt_status *s)
                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[],
@@ -1229,15 +1166,17 @@ static int parse_and_validate_options(int argc, const char *argv[],
        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);
 
@@ -1255,37 +1194,24 @@ static int parse_and_validate_options(int argc, const char *argv[],
 static int dry_run_commit(int argc, const char **argv, const char *prefix,
                          const struct commit *current_head, struct wt_status *s)
 {
-       int commitable;
+       int committable;
        const char *index_file;
 
        index_file = prepare_index(argc, argv, prefix, current_head, 1);
-       commitable = run_status(stdout, index_file, prefix, 0, s);
+       committable = run_status(stdout, index_file, prefix, 0, s);
        rollback_index_files();
 
-       return commitable ? 0 : 1;
+       return committable ? 0 : 1;
 }
 
+define_list_config_array_extra(color_status_slots, {"added"});
+
 static int parse_status_slot(const char *slot)
 {
-       if (!strcasecmp(slot, "header"))
-               return WT_STATUS_HEADER;
-       if (!strcasecmp(slot, "branch"))
-               return WT_STATUS_ONBRANCH;
-       if (!strcasecmp(slot, "updated") || !strcasecmp(slot, "added"))
+       if (!strcasecmp(slot, "added"))
                return WT_STATUS_UPDATED;
-       if (!strcasecmp(slot, "changed"))
-               return WT_STATUS_CHANGED;
-       if (!strcasecmp(slot, "untracked"))
-               return WT_STATUS_UNTRACKED;
-       if (!strcasecmp(slot, "nobranch"))
-               return WT_STATUS_NOBRANCH;
-       if (!strcasecmp(slot, "unmerged"))
-               return WT_STATUS_UNMERGED;
-       if (!strcasecmp(slot, "localBranch"))
-               return WT_STATUS_LOCAL_BRANCH;
-       if (!strcasecmp(slot, "remoteBranch"))
-               return WT_STATUS_REMOTE_BRANCH;
-       return -1;
+
+       return LOOKUP_CONFIG(color_status_slots, slot);
 }
 
 static int git_status_config(const char *k, const char *v, void *cb)
@@ -1351,12 +1277,33 @@ static int git_status_config(const char *k, const char *v, void *cb)
                        return error(_("Invalid untracked files mode '%s'"), v);
                return 0;
        }
+       if (!strcmp(k, "diff.renamelimit")) {
+               if (s->rename_limit == -1)
+                       s->rename_limit = git_config_int(k, v);
+               return 0;
+       }
+       if (!strcmp(k, "status.renamelimit")) {
+               s->rename_limit = git_config_int(k, v);
+               return 0;
+       }
+       if (!strcmp(k, "diff.renames")) {
+               if (s->detect_rename == -1)
+                       s->detect_rename = git_config_rename(k, v);
+               return 0;
+       }
+       if (!strcmp(k, "status.renames")) {
+               s->detect_rename = git_config_rename(k, v);
+               return 0;
+       }
        return git_diff_ui_config(k, v, NULL);
 }
 
 int cmd_status(int argc, const char **argv, const char *prefix)
 {
+       static int no_renames = -1;
+       static const char *rename_score_arg = (const char *)-1;
        static struct wt_status s;
+       unsigned int progress_flag = 0;
        int fd;
        struct object_id oid;
        static struct option builtin_status_options[] = {
@@ -1367,6 +1314,8 @@ int cmd_status(int argc, const char **argv, const char *prefix)
                         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 },
@@ -1387,6 +1336,10 @@ int cmd_status(int argc, const char **argv, const char *prefix)
                  N_("ignore changes to submodules, optional when: all, dirty, untracked. (Default: all)"),
                  PARSE_OPT_OPTARG, NULL, (intptr_t)"all" },
                OPT_COLUMN(0, "column", &s.colopts, N_("list untracked files in columns")),
+               OPT_BOOL(0, "no-renames", &no_renames, N_("do not detect renames")),
+               { OPTION_CALLBACK, 'M', "find-renames", &rename_score_arg,
+                 N_("n"), N_("detect renames, optionally set similarity index"),
+                 PARSE_OPT_OPTARG | PARSE_OPT_NONEG, opt_parse_rename_score },
                OPT_END(),
        };
 
@@ -1411,8 +1364,13 @@ int cmd_status(int argc, const char **argv, const char *prefix)
                       PATHSPEC_PREFER_FULL,
                       prefix, argv);
 
-       read_cache_preload(&s.pathspec);
-       refresh_index(&the_index, REFRESH_QUIET|REFRESH_UNMERGED, &s.pathspec, NULL, NULL);
+       if (status_format != STATUS_FORMAT_PORCELAIN &&
+           status_format != STATUS_FORMAT_PORCELAIN_V2)
+               progress_flag = REFRESH_PROGRESS;
+       read_index(&the_index);
+       refresh_index(&the_index,
+                     REFRESH_QUIET|REFRESH_UNMERGED|progress_flag,
+                     &s.pathspec, NULL, NULL);
 
        if (use_optional_locks())
                fd = hold_locked_index(&index_lock, 0);
@@ -1426,6 +1384,14 @@ int cmd_status(int argc, const char **argv, const char *prefix)
        s.ignore_submodule_arg = ignore_submodule_arg;
        s.status_format = status_format;
        s.verbose = verbose;
+       if (no_renames != -1)
+               s.detect_rename = !no_renames;
+       if ((intptr_t)rename_score_arg != -1) {
+               if (s.detect_rename < DIFF_DETECT_RENAME)
+                       s.detect_rename = DIFF_DETECT_RENAME;
+               if (rename_score_arg)
+                       s.rename_score = parse_rename_score(&rename_score_arg);
+       }
 
        wt_status_collect(&s);
 
@@ -1436,99 +1402,9 @@ int cmd_status(int argc, const char **argv, const char *prefix)
                s.prefix = prefix;
 
        wt_status_print(&s);
-       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;
-       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 = DIFF_DETECT_RENAME;
-       rev.diffopt.break_opt = 0;
-       diff_setup_done(&rev.diffopt);
-
-       head = resolve_ref_unsafe("HEAD", 0, NULL, NULL);
-       if (!head)
-               die_errno(_("unable to resolve HEAD after creating commit"));
-       if (!strcmp(head, "HEAD"))
-               head = _("detached HEAD");
-       else
-               skip_prefix(head, "refs/heads/", &head);
-       printf("[%s%s ", head, initial_commit ? _(" (root-commit)") : "");
+       wt_status_collect_free_buffers(&s);
 
-       if (!log_tree_commit(&rev, commit)) {
-               rev.always_show_header = 1;
-               rev.use_terminator = 1;
-               log_tree_commit(&rev, commit);
-       }
-
-       strbuf_release(&format);
+       return 0;
 }
 
 static int git_commit_config(const char *k, const char *v, void *cb)
@@ -1560,37 +1436,6 @@ static int git_commit_config(const char *k, const char *v, void *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;
@@ -1615,6 +1460,7 @@ int run_commit_hook(int editor_is_used, const char *index_file, const char *name
 
 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")),
@@ -1650,6 +1496,8 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
                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,
@@ -1673,13 +1521,11 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
        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"))
@@ -1734,7 +1580,7 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
                if (!reflog_msg)
                        reflog_msg = "commit (merge)";
                pptr = commit_list_append(current_head, pptr);
-               fp = xfopen(git_path_merge_head(), "r");
+               fp = xfopen(git_path_merge_head(the_repository), "r");
                while (strbuf_getline_lf(&m, fp) != EOF) {
                        struct commit *parent;
 
@@ -1745,8 +1591,8 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
                }
                fclose(fp);
                strbuf_release(&m);
-               if (!stat(git_path_merge_mode(), &statbuf)) {
-                       if (strbuf_read_file(&sb, git_path_merge_mode(), 0) < 0)
+               if (!stat(git_path_merge_mode(the_repository), &statbuf)) {
+                       if (strbuf_read_file(&sb, git_path_merge_mode(the_repository), 0) < 0)
                                die_errno(_("could not read MERGE_MODE"));
                        if (!strcmp(sb.buf, "no-ff"))
                                allow_fast_forward = 0;
@@ -1770,17 +1616,17 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
        }
 
        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);
@@ -1794,60 +1640,52 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
                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,
-                                  current_head
-                                  ? &current_head->object.oid : &null_oid,
-                                  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());
-       unlink(git_path_merge_head());
-       unlink(git_path_merge_msg());
-       unlink(git_path_merge_mode());
-       unlink(git_path_squash_msg());
+       unlink(git_path_cherry_pick_head(the_repository));
+       unlink(git_path_revert_head(the_repository));
+       unlink(git_path_merge_head(the_repository));
+       unlink(git_path_merge_msg(the_repository));
+       unlink(git_path_merge_mode(the_repository));
+       unlink(git_path_squash_msg(the_repository));
 
        if (commit_index_files())
-               die (_("Repository has been updated, but unable to write\n"
-                    "new_index file. Check that disk is not full and quota is\n"
-                    "not exceeded, and then \"git reset HEAD\" to recover."));
+               die(_("repository has been updated, but unable to write\n"
+                     "new_index file. Check that disk is not full and quota is\n"
+                     "not exceeded, and then \"git reset HEAD\" to recover."));
+
+       if (git_env_bool(GIT_TEST_COMMIT_GRAPH, 0))
+               write_commit_graph_reachable(get_object_directory(), 0, 0);
 
-       rerere(0);
+       repo_rerere(the_repository, 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(the_repository, prefix,
+                                    &oid, flags);
        }
-       if (!quiet)
-               print_summary(prefix, &oid, !current_head);
 
        UNLEAK(err);
        UNLEAK(sb);