Git 1.7.0.3
[gitweb.git] / builtin-commit.c
index 0e72a5657a52d3e3be2aae10993a30784607a896..f4c73442cfba9483a826dcfbf68f5466d43e8351 100644 (file)
@@ -24,6 +24,7 @@
 #include "string-list.h"
 #include "rerere.h"
 #include "unpack-trees.h"
+#include "quote.h"
 
 static const char * const builtin_commit_usage[] = {
        "git commit [options] [--] <filepattern>...",
@@ -35,7 +36,20 @@ static const char * const builtin_status_usage[] = {
        NULL
 };
 
-static unsigned char head_sha1[20], merge_head_sha1[20];
+static const char implicit_ident_advice[] =
+"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"
+"If the identity used for this commit is wrong, you can fix it with:\n"
+"\n"
+"    git commit --amend --author='Your Name <you@example.com>'\n";
+
+static unsigned char head_sha1[20];
+
 static char *use_message_buffer;
 static const char commit_editmsg[] = "COMMIT_EDITMSG";
 static struct lock_file index_lock; /* real index */
@@ -51,8 +65,8 @@ static const char *template_file;
 static char *edit_message, *use_message;
 static char *author_name, *author_email, *author_date;
 static int all, edit_flag, also, interactive, only, amend, signoff;
-static int quiet, verbose, no_verify, allow_empty;
-static char *untracked_files_arg;
+static int quiet, verbose, no_verify, allow_empty, dry_run, renew_authorship;
+static char *untracked_files_arg, *force_date;
 /*
  * The default commit message cleanup mode will remove the lines
  * beginning with # (shell comments) and leading and trailing
@@ -67,10 +81,17 @@ static enum {
 } cleanup_mode;
 static char *cleanup_arg;
 
-static int use_editor = 1, initial_commit, in_merge;
+static int use_editor = 1, initial_commit, in_merge, include_status = 1;
 static const char *only_include_assumed;
 static struct strbuf message;
 
+static int null_termination;
+static enum {
+       STATUS_FORMAT_LONG,
+       STATUS_FORMAT_SHORT,
+       STATUS_FORMAT_PORCELAIN,
+} status_format = STATUS_FORMAT_LONG;
+
 static int opt_parse_m(const struct option *opt, const char *arg, int unset)
 {
        struct strbuf *buf = opt->value;
@@ -88,15 +109,18 @@ static struct option builtin_commit_options[] = {
        OPT__VERBOSE(&verbose),
 
        OPT_GROUP("Commit message options"),
-       OPT_STRING('F', "file", &logfile, "FILE", "read log from file"),
+       OPT_FILENAME('F', "file", &logfile, "read log from file"),
        OPT_STRING(0, "author", &force_author, "AUTHOR", "override author for commit"),
+       OPT_STRING(0, "date", &force_date, "DATE", "override date for commit"),
        OPT_CALLBACK('m', "message", &message, "MESSAGE", "specify commit message", opt_parse_m),
-       OPT_STRING('c', "reedit-message", &edit_message, "COMMIT", "reuse and edit message from specified commit "),
+       OPT_STRING('c', "reedit-message", &edit_message, "COMMIT", "reuse and edit message from specified commit"),
        OPT_STRING('C', "reuse-message", &use_message, "COMMIT", "reuse message from specified commit"),
+       OPT_BOOLEAN(0, "reset-author", &renew_authorship, "the commit is authored by me now (used with -C-c/--amend)"),
        OPT_BOOLEAN('s', "signoff", &signoff, "add Signed-off-by:"),
-       OPT_STRING('t', "template", &template_file, "FILE", "use specified template file"),
+       OPT_FILENAME('t', "template", &template_file, "use specified template file"),
        OPT_BOOLEAN('e', "edit", &edit_flag, "force edit of commit"),
        OPT_STRING(0, "cleanup", &cleanup_arg, "default", "how to strip spaces and #comments from message"),
+       OPT_BOOLEAN(0, "status", &include_status, "include status in commit message template"),
        /* end commit message options */
 
        OPT_GROUP("Commit contents options"),
@@ -105,6 +129,13 @@ static struct option builtin_commit_options[] = {
        OPT_BOOLEAN(0, "interactive", &interactive, "interactively add files"),
        OPT_BOOLEAN('o', "only", &only, "commit only specified files"),
        OPT_BOOLEAN('n', "no-verify", &no_verify, "bypass pre-commit hook"),
+       OPT_BOOLEAN(0, "dry-run", &dry_run, "show what would be committed"),
+       OPT_SET_INT(0, "short", &status_format, "show status concisely",
+                   STATUS_FORMAT_SHORT),
+       OPT_SET_INT(0, "porcelain", &status_format,
+                   "show porcelain output format", STATUS_FORMAT_PORCELAIN),
+       OPT_BOOLEAN('z', "null", &null_termination,
+                   "terminate entries with NUL"),
        OPT_BOOLEAN(0, "amend", &amend, "amend previous commit"),
        { OPTION_STRING, 'u', "untracked-files", &untracked_files_arg, "mode", "show untracked files, optional modes: all, normal, no. (Default: all)", PARSE_OPT_OPTARG, NULL, (intptr_t)"all" },
        OPT_BOOLEAN(0, "allow-empty", &allow_empty, "ok to record an empty change"),
@@ -166,11 +197,15 @@ static int list_paths(struct string_list *list, const char *with_tree,
 
        for (i = 0; i < active_nr; i++) {
                struct cache_entry *ce = active_cache[i];
+               struct string_list_item *item;
+
                if (ce->ce_flags & CE_UPDATE)
                        continue;
                if (!match_pathspec(pattern, ce->name, ce_namelen(ce), 0, m))
                        continue;
-               string_list_insert(ce->name, list);
+               item = string_list_insert(ce->name, list);
+               if (ce_skip_worktree(ce))
+                       item->util = item; /* better a valid pointer than a fake one */
        }
 
        return report_path_error(m, pattern, prefix ? strlen(prefix) : 0);
@@ -183,6 +218,10 @@ static void add_remove_files(struct string_list *list)
                struct stat st;
                struct string_list_item *p = &(list->items[i]);
 
+               /* p->util is skip-worktree */
+               if (p->util)
+                       continue;
+
                if (!lstat(p->string, &st)) {
                        if (add_to_cache(p->string, &st, 0))
                                die("updating files failed");
@@ -219,12 +258,25 @@ static void create_base_index(void)
                exit(128); /* We've already reported the error, finish dying */
 }
 
-static char *prepare_index(int argc, const char **argv, const char *prefix)
+static void refresh_cache_or_die(int refresh_flags)
+{
+       /*
+        * refresh_flags contains REFRESH_QUIET, so the only errors
+        * are for unmerged entries.
+        */
+       if (refresh_cache(refresh_flags | REFRESH_IN_PORCELAIN))
+               die_resolve_conflict("commit");
+}
+
+static char *prepare_index(int argc, const char **argv, const char *prefix, int is_status)
 {
        int fd;
        struct string_list partial;
        const char **pathspec = NULL;
+       int refresh_flags = REFRESH_QUIET;
 
+       if (is_status)
+               refresh_flags |= REFRESH_UNMERGED;
        if (interactive) {
                if (interactive_add(argc, argv, prefix) != 0)
                        die("interactive add failed");
@@ -255,7 +307,7 @@ static char *prepare_index(int argc, const char **argv, const char *prefix)
        if (all || (also && pathspec && *pathspec)) {
                int fd = hold_locked_index(&index_lock, 1);
                add_files_to_cache(also ? prefix : NULL, pathspec, 0);
-               refresh_cache(REFRESH_QUIET);
+               refresh_cache_or_die(refresh_flags);
                if (write_cache(fd, active_cache, active_nr) ||
                    close_lock_file(&index_lock))
                        die("unable to write new_index file");
@@ -274,7 +326,7 @@ static char *prepare_index(int argc, const char **argv, const char *prefix)
         */
        if (!pathspec || !*pathspec) {
                fd = hold_locked_index(&index_lock, 1);
-               refresh_cache(REFRESH_QUIET);
+               refresh_cache_or_die(refresh_flags);
                if (write_cache(fd, active_cache, active_nr) ||
                    commit_locked_index(&index_lock))
                        die("unable to write new_index file");
@@ -303,7 +355,7 @@ static char *prepare_index(int argc, const char **argv, const char *prefix)
         */
        commit_style = COMMIT_PARTIAL;
 
-       if (file_exists(git_path("MERGE_HEAD")))
+       if (in_merge)
                die("cannot do a partial commit during a merge.");
 
        memset(&partial, 0, sizeof(partial));
@@ -341,27 +393,39 @@ static char *prepare_index(int argc, const char **argv, const char *prefix)
        return false_lock.filename;
 }
 
-static int run_status(FILE *fp, const char *index_file, const char *prefix, int nowarn)
+static int run_status(FILE *fp, const char *index_file, const char *prefix, int nowarn,
+                     struct wt_status *s)
 {
-       struct wt_status s;
+       unsigned char sha1[20];
 
-       wt_status_prepare(&s);
-       if (wt_status_relative_paths)
-               s.prefix = prefix;
+       if (s->relative_paths)
+               s->prefix = prefix;
 
        if (amend) {
-               s.amend = 1;
-               s.reference = "HEAD^1";
+               s->amend = 1;
+               s->reference = "HEAD^1";
        }
-       s.verbose = verbose;
-       s.untracked = (show_untracked_files == SHOW_ALL_UNTRACKED_FILES);
-       s.index_file = index_file;
-       s.fp = fp;
-       s.nowarn = nowarn;
+       s->verbose = verbose;
+       s->index_file = index_file;
+       s->fp = fp;
+       s->nowarn = nowarn;
+       s->is_initial = get_sha1(s->reference, sha1) ? 1 : 0;
 
-       wt_status_print(&s);
+       wt_status_collect(s);
 
-       return s.commitable;
+       switch (status_format) {
+       case STATUS_FORMAT_SHORT:
+               wt_shortstatus_print(s, null_termination);
+               break;
+       case STATUS_FORMAT_PORCELAIN:
+               wt_porcelain_print(s, null_termination);
+               break;
+       case STATUS_FORMAT_LONG:
+               wt_status_print(s);
+               break;
+       }
+
+       return s->commitable;
 }
 
 static int is_a_merge(const unsigned char *sha1)
@@ -382,7 +446,7 @@ static void determine_author_info(void)
        email = getenv("GIT_AUTHOR_EMAIL");
        date = getenv("GIT_AUTHOR_DATE");
 
-       if (use_message) {
+       if (use_message && !renew_authorship) {
                const char *a, *lb, *rb, *eol;
 
                a = strstr(use_message_buffer, "\nauthor ");
@@ -410,12 +474,57 @@ static void determine_author_info(void)
                email = xstrndup(lb + 2, rb - (lb + 2));
        }
 
+       if (force_date)
+               date = force_date;
+
        author_name = name;
        author_email = email;
        author_date = date;
 }
 
-static int prepare_to_commit(const char *index_file, const char *prefix)
+static int ends_rfc2822_footer(struct strbuf *sb)
+{
+       int ch;
+       int hit = 0;
+       int i, j, k;
+       int len = sb->len;
+       int first = 1;
+       const char *buf = sb->buf;
+
+       for (i = len - 1; i > 0; i--) {
+               if (hit && buf[i] == '\n')
+                       break;
+               hit = (buf[i] == '\n');
+       }
+
+       while (i < len - 1 && buf[i] == '\n')
+               i++;
+
+       for (; i < len; i = k) {
+               for (k = i; k < len && buf[k] != '\n'; k++)
+                       ; /* do nothing */
+               k++;
+
+               if ((buf[k] == ' ' || buf[k] == '\t') && !first)
+                       continue;
+
+               first = 0;
+
+               for (j = 0; i + j < len; j++) {
+                       ch = buf[i + j];
+                       if (ch == ':')
+                               break;
+                       if (isalnum(ch) ||
+                           (ch == '-'))
+                               continue;
+                       return 0;
+               }
+       }
+       return 1;
+}
+
+static int prepare_to_commit(const char *index_file, const char *prefix,
+                            struct wt_status *s)
 {
        struct stat statbuf;
        int commitable, saved_color_setting;
@@ -436,12 +545,12 @@ static int prepare_to_commit(const char *index_file, const char *prefix)
                if (isatty(0))
                        fprintf(stderr, "(reading log message from standard input)\n");
                if (strbuf_read(&sb, 0, 0) < 0)
-                       die("could not read log from standard input");
+                       die_errno("could not read log from standard input");
                hook_arg1 = "message";
        } else if (logfile) {
                if (strbuf_read_file(&sb, logfile, 0) < 0)
-                       die("could not read log file '%s': %s",
-                           logfile, strerror(errno));
+                       die_errno("could not read log file '%s'",
+                                 logfile);
                hook_arg1 = "message";
        } else if (use_message) {
                buffer = strstr(use_message_buffer, "\n\n");
@@ -452,16 +561,15 @@ static int prepare_to_commit(const char *index_file, const char *prefix)
                hook_arg2 = use_message;
        } else if (!stat(git_path("MERGE_MSG"), &statbuf)) {
                if (strbuf_read_file(&sb, git_path("MERGE_MSG"), 0) < 0)
-                       die("could not read MERGE_MSG: %s", strerror(errno));
+                       die_errno("could not read MERGE_MSG");
                hook_arg1 = "merge";
        } else if (!stat(git_path("SQUASH_MSG"), &statbuf)) {
                if (strbuf_read_file(&sb, git_path("SQUASH_MSG"), 0) < 0)
-                       die("could not read SQUASH_MSG: %s", strerror(errno));
+                       die_errno("could not read SQUASH_MSG");
                hook_arg1 = "squash";
        } else if (template_file && !stat(template_file, &statbuf)) {
                if (strbuf_read_file(&sb, template_file, 0) < 0)
-                       die("could not read %s: %s",
-                           template_file, strerror(errno));
+                       die_errno("could not read '%s'", template_file);
                hook_arg1 = "template";
        }
 
@@ -474,8 +582,7 @@ static int prepare_to_commit(const char *index_file, const char *prefix)
 
        fp = fopen(git_path(commit_editmsg), "w");
        if (fp == NULL)
-               die("could not open %s: %s",
-                   git_path(commit_editmsg), strerror(errno));
+               die_errno("could not open '%s'", git_path(commit_editmsg));
 
        if (cleanup_mode != CLEANUP_NONE)
                stripspace(&sb, 0);
@@ -491,7 +598,7 @@ static int prepare_to_commit(const char *index_file, const char *prefix)
                for (i = sb.len - 1; i > 0 && sb.buf[i - 1] != '\n'; i--)
                        ; /* do nothing */
                if (prefixcmp(sb.buf + i, sob.buf)) {
-                       if (prefixcmp(sb.buf + i, sign_off_header))
+                       if (!i || !ends_rfc2822_footer(&sb))
                                strbuf_addch(&sb, '\n');
                        strbuf_addbuf(&sb, &sob);
                }
@@ -499,7 +606,7 @@ static int prepare_to_commit(const char *index_file, const char *prefix)
        }
 
        if (fwrite(sb.buf, 1, sb.len, fp) < sb.len)
-               die("could not write commit template: %s", strerror(errno));
+               die_errno("could not write commit template");
 
        strbuf_release(&sb);
 
@@ -507,7 +614,7 @@ static int prepare_to_commit(const char *index_file, const char *prefix)
 
        /* This checks if committer ident is explicitly given */
        git_committer_info(0);
-       if (use_editor) {
+       if (use_editor && include_status) {
                char *author_ident;
                const char *committer_ident;
 
@@ -549,7 +656,7 @@ static int prepare_to_commit(const char *index_file, const char *prefix)
                                author_ident);
                free(author_ident);
 
-               if (!user_ident_explicitly_given)
+               if (!user_ident_sufficiently_given())
                        fprintf(fp,
                                "%s"
                                "# Committer: %s\n",
@@ -559,10 +666,10 @@ static int prepare_to_commit(const char *index_file, const char *prefix)
                if (ident_shown)
                        fprintf(fp, "#\n");
 
-               saved_color_setting = wt_status_use_color;
-               wt_status_use_color = 0;
-               commitable = run_status(fp, index_file, prefix, 1);
-               wt_status_use_color = saved_color_setting;
+               saved_color_setting = s->use_color;
+               s->use_color = 0;
+               commitable = run_status(fp, index_file, prefix, 1, s);
+               s->use_color = saved_color_setting;
        } else {
                unsigned char sha1[20];
                const char *parent = "HEAD";
@@ -583,7 +690,7 @@ static int prepare_to_commit(const char *index_file, const char *prefix)
 
        if (!commitable && !in_merge && !allow_empty &&
            !(amend && is_a_merge(head_sha1))) {
-               run_status(stdout, index_file, prefix, 0);
+               run_status(stdout, index_file, prefix, 0, s);
                return 0;
        }
 
@@ -686,30 +793,46 @@ static const char *find_author_by_nickname(const char *name)
        prepare_revision_walk(&revs);
        commit = get_revision(&revs);
        if (commit) {
+               struct pretty_print_context ctx = {0};
+               ctx.date_mode = DATE_NORMAL;
                strbuf_release(&buf);
-               format_commit_message(commit, "%an <%ae>", &buf, DATE_NORMAL);
+               format_commit_message(commit, "%an <%ae>", &buf, &ctx);
                return strbuf_detach(&buf, NULL);
        }
        die("No existing author found with '%s'", name);
 }
 
+
+static void handle_untracked_files_arg(struct wt_status *s)
+{
+       if (!untracked_files_arg)
+               ; /* default already initialized */
+       else if (!strcmp(untracked_files_arg, "no"))
+               s->show_untracked_files = SHOW_NO_UNTRACKED_FILES;
+       else if (!strcmp(untracked_files_arg, "normal"))
+               s->show_untracked_files = SHOW_NORMAL_UNTRACKED_FILES;
+       else if (!strcmp(untracked_files_arg, "all"))
+               s->show_untracked_files = SHOW_ALL_UNTRACKED_FILES;
+       else
+               die("Invalid untracked files mode '%s'", untracked_files_arg);
+}
+
 static int parse_and_validate_options(int argc, const char *argv[],
                                      const char * const usage[],
-                                     const char *prefix)
+                                     const char *prefix,
+                                     struct wt_status *s)
 {
        int f = 0;
 
-       argc = parse_options(argc, argv, builtin_commit_options, usage, 0);
-       logfile = parse_options_fix_filename(prefix, logfile);
-       if (logfile)
-               logfile = xstrdup(logfile);
-       template_file = parse_options_fix_filename(prefix, template_file);
-       if (template_file)
-               template_file = xstrdup(template_file);
+       argc = parse_options(argc, argv, prefix, builtin_commit_options, usage,
+                            0);
 
        if (force_author && !strchr(force_author, '>'))
                force_author = find_author_by_nickname(force_author);
 
+       if (force_author && renew_authorship)
+               die("Using both --reset-author and --author does not make sense");
+
        if (logfile || message.len || use_message)
                use_editor = 0;
        if (edit_flag)
@@ -720,9 +843,6 @@ static int parse_and_validate_options(int argc, const char *argv[],
        if (get_sha1("HEAD", head_sha1))
                initial_commit = 1;
 
-       if (!get_sha1("MERGE_HEAD", merge_head_sha1))
-               in_merge = 1;
-
        /* Sanity check options */
        if (amend && initial_commit)
                die("You have nothing to amend.");
@@ -743,6 +863,8 @@ static int parse_and_validate_options(int argc, const char *argv[],
                use_message = edit_message;
        if (amend && !use_message)
                use_message = "HEAD";
+       if (!use_message && renew_authorship)
+               die("--reset-author can be used only with -C, -c or --amend.");
        if (use_message) {
                unsigned char sha1[20];
                static char utf8[] = "UTF-8";
@@ -800,56 +922,168 @@ static int parse_and_validate_options(int argc, const char *argv[],
        else
                die("Invalid cleanup mode %s", cleanup_arg);
 
-       if (!untracked_files_arg)
-               ; /* default already initialized */
-       else if (!strcmp(untracked_files_arg, "no"))
-               show_untracked_files = SHOW_NO_UNTRACKED_FILES;
-       else if (!strcmp(untracked_files_arg, "normal"))
-               show_untracked_files = SHOW_NORMAL_UNTRACKED_FILES;
-       else if (!strcmp(untracked_files_arg, "all"))
-               show_untracked_files = SHOW_ALL_UNTRACKED_FILES;
-       else
-               die("Invalid untracked files mode '%s'", untracked_files_arg);
+       handle_untracked_files_arg(s);
 
        if (all && argc > 0)
                die("Paths with -a does not make sense.");
        else if (interactive && argc > 0)
                die("Paths with --interactive does not make sense.");
 
+       if (null_termination && status_format == STATUS_FORMAT_LONG)
+               status_format = STATUS_FORMAT_PORCELAIN;
+       if (status_format != STATUS_FORMAT_LONG)
+               dry_run = 1;
+
        return argc;
 }
 
-int cmd_status(int argc, const char **argv, const char *prefix)
+static int dry_run_commit(int argc, const char **argv, const char *prefix,
+                         struct wt_status *s)
 {
-       const char *index_file;
        int commitable;
+       const char *index_file;
 
-       git_config(git_status_config, NULL);
+       index_file = prepare_index(argc, argv, prefix, 1);
+       commitable = run_status(stdout, index_file, prefix, 0, s);
+       rollback_index_files();
 
-       if (wt_status_use_color == -1)
-               wt_status_use_color = git_use_color_default;
+       return commitable ? 0 : 1;
+}
 
-       if (diff_use_color_default == -1)
-               diff_use_color_default = git_use_color_default;
+static int parse_status_slot(const char *var, int offset)
+{
+       if (!strcasecmp(var+offset, "header"))
+               return WT_STATUS_HEADER;
+       if (!strcasecmp(var+offset, "updated")
+               || !strcasecmp(var+offset, "added"))
+               return WT_STATUS_UPDATED;
+       if (!strcasecmp(var+offset, "changed"))
+               return WT_STATUS_CHANGED;
+       if (!strcasecmp(var+offset, "untracked"))
+               return WT_STATUS_UNTRACKED;
+       if (!strcasecmp(var+offset, "nobranch"))
+               return WT_STATUS_NOBRANCH;
+       if (!strcasecmp(var+offset, "unmerged"))
+               return WT_STATUS_UNMERGED;
+       return -1;
+}
 
-       argc = parse_and_validate_options(argc, argv, builtin_status_usage, prefix);
+static int git_status_config(const char *k, const char *v, void *cb)
+{
+       struct wt_status *s = cb;
 
-       index_file = prepare_index(argc, argv, prefix);
+       if (!strcmp(k, "status.submodulesummary")) {
+               int is_bool;
+               s->submodule_summary = git_config_bool_or_int(k, v, &is_bool);
+               if (is_bool && s->submodule_summary)
+                       s->submodule_summary = -1;
+               return 0;
+       }
+       if (!strcmp(k, "status.color") || !strcmp(k, "color.status")) {
+               s->use_color = git_config_colorbool(k, v, -1);
+               return 0;
+       }
+       if (!prefixcmp(k, "status.color.") || !prefixcmp(k, "color.status.")) {
+               int slot = parse_status_slot(k, 13);
+               if (slot < 0)
+                       return 0;
+               if (!v)
+                       return config_error_nonbool(k);
+               color_parse(v, k, s->color_palette[slot]);
+               return 0;
+       }
+       if (!strcmp(k, "status.relativepaths")) {
+               s->relative_paths = git_config_bool(k, v);
+               return 0;
+       }
+       if (!strcmp(k, "status.showuntrackedfiles")) {
+               if (!v)
+                       return config_error_nonbool(k);
+               else if (!strcmp(v, "no"))
+                       s->show_untracked_files = SHOW_NO_UNTRACKED_FILES;
+               else if (!strcmp(v, "normal"))
+                       s->show_untracked_files = SHOW_NORMAL_UNTRACKED_FILES;
+               else if (!strcmp(v, "all"))
+                       s->show_untracked_files = SHOW_ALL_UNTRACKED_FILES;
+               else
+                       return error("Invalid untracked files mode '%s'", v);
+               return 0;
+       }
+       return git_diff_ui_config(k, v, NULL);
+}
 
-       commitable = run_status(stdout, index_file, prefix, 0);
+int cmd_status(int argc, const char **argv, const char *prefix)
+{
+       struct wt_status s;
+       unsigned char sha1[20];
+       static struct option builtin_status_options[] = {
+               OPT__VERBOSE(&verbose),
+               OPT_SET_INT('s', "short", &status_format,
+                           "show status concisely", STATUS_FORMAT_SHORT),
+               OPT_SET_INT(0, "porcelain", &status_format,
+                           "show porcelain output format",
+                           STATUS_FORMAT_PORCELAIN),
+               OPT_BOOLEAN('z', "null", &null_termination,
+                           "terminate entries with NUL"),
+               { OPTION_STRING, 'u', "untracked-files", &untracked_files_arg,
+                 "mode",
+                 "show untracked files, optional modes: all, normal, no. (Default: all)",
+                 PARSE_OPT_OPTARG, NULL, (intptr_t)"all" },
+               OPT_END(),
+       };
+
+       if (null_termination && status_format == STATUS_FORMAT_LONG)
+               status_format = STATUS_FORMAT_PORCELAIN;
 
-       rollback_index_files();
+       wt_status_prepare(&s);
+       git_config(git_status_config, &s);
+       in_merge = file_exists(git_path("MERGE_HEAD"));
+       argc = parse_options(argc, argv, prefix,
+                            builtin_status_options,
+                            builtin_status_usage, 0);
+       handle_untracked_files_arg(&s);
 
-       return commitable ? 0 : 1;
+       if (*argv)
+               s.pathspec = get_pathspec(prefix, argv);
+
+       read_cache_preload(s.pathspec);
+       refresh_index(&the_index, REFRESH_QUIET|REFRESH_UNMERGED, s.pathspec, NULL, NULL);
+       s.is_initial = get_sha1(s.reference, sha1) ? 1 : 0;
+       s.in_merge = in_merge;
+       wt_status_collect(&s);
+
+       if (s.relative_paths)
+               s.prefix = prefix;
+       if (s.use_color == -1)
+               s.use_color = git_use_color_default;
+       if (diff_use_color_default == -1)
+               diff_use_color_default = git_use_color_default;
+
+       switch (status_format) {
+       case STATUS_FORMAT_SHORT:
+               wt_shortstatus_print(&s, null_termination);
+               break;
+       case STATUS_FORMAT_PORCELAIN:
+               wt_porcelain_print(&s, null_termination);
+               break;
+       case STATUS_FORMAT_LONG:
+               s.verbose = verbose;
+               wt_status_print(&s);
+               break;
+       }
+       return 0;
 }
 
 static void print_summary(const char *prefix, const unsigned char *sha1)
 {
        struct rev_info rev;
        struct commit *commit;
-       static const char *format = "format:%h] %s";
+       struct strbuf format = STRBUF_INIT;
        unsigned char junk_sha1[20];
        const char *head = resolve_ref("HEAD", junk_sha1, 0, NULL);
+       struct pretty_print_context pctx = {0};
+       struct strbuf author_ident = STRBUF_INIT;
+       struct strbuf committer_ident = STRBUF_INIT;
 
        commit = lookup_commit(sha1);
        if (!commit)
@@ -857,6 +1091,25 @@ static void print_summary(const char *prefix, const unsigned char *sha1)
        if (!commit || 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 (!user_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);
 
@@ -867,7 +1120,7 @@ static void print_summary(const char *prefix, const unsigned char *sha1)
 
        rev.verbose_header = 1;
        rev.show_root_diff = 1;
-       get_commit_format(format, &rev);
+       get_commit_format(format.buf, &rev);
        rev.always_show_header = 0;
        rev.diffopt.detect_rename = 1;
        rev.diffopt.rename_limit = 100;
@@ -883,19 +1136,28 @@ static void print_summary(const char *prefix, const unsigned char *sha1)
                initial_commit ? " (root-commit)" : "");
 
        if (!log_tree_commit(&rev, commit)) {
+               struct pretty_print_context ctx = {0};
                struct strbuf buf = STRBUF_INIT;
-               format_commit_message(commit, format + 7, &buf, DATE_NORMAL);
+               ctx.date_mode = DATE_NORMAL;
+               format_commit_message(commit, format.buf + 7, &buf, &ctx);
                printf("%s\n", buf.buf);
                strbuf_release(&buf);
        }
+       strbuf_release(&format);
 }
 
 static int git_commit_config(const char *k, const char *v, void *cb)
 {
+       struct wt_status *s = cb;
+
        if (!strcmp(k, "commit.template"))
-               return git_config_string(&template_file, k, v);
+               return git_config_pathname(&template_file, k, v);
+       if (!strcmp(k, "commit.status")) {
+               include_status = git_config_bool(k, v);
+               return 0;
+       }
 
-       return git_status_config(k, v, cb);
+       return git_status_config(k, v, s);
 }
 
 int cmd_commit(int argc, const char **argv, const char *prefix)
@@ -908,19 +1170,27 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
        struct commit_list *parents = NULL, **pptr = &parents;
        struct stat statbuf;
        int allow_fast_forward = 1;
+       struct wt_status s;
 
-       git_config(git_commit_config, NULL);
-
-       if (wt_status_use_color == -1)
-               wt_status_use_color = git_use_color_default;
-
-       argc = parse_and_validate_options(argc, argv, builtin_commit_usage, prefix);
-
-       index_file = prepare_index(argc, argv, prefix);
+       wt_status_prepare(&s);
+       git_config(git_commit_config, &s);
+       in_merge = file_exists(git_path("MERGE_HEAD"));
+       s.in_merge = in_merge;
+
+       if (s.use_color == -1)
+               s.use_color = git_use_color_default;
+       argc = parse_and_validate_options(argc, argv, builtin_commit_usage,
+                                         prefix, &s);
+       if (dry_run) {
+               if (diff_use_color_default == -1)
+                       diff_use_color_default = git_use_color_default;
+               return dry_run_commit(argc, argv, prefix, &s);
+       }
+       index_file = prepare_index(argc, argv, prefix, 0);
 
        /* Set up everything for writing the commit object.  This includes
           running hooks, writing the trees, and interacting with the user.  */
-       if (!prepare_to_commit(index_file, prefix)) {
+       if (!prepare_to_commit(index_file, prefix, &s)) {
                rollback_index_files();
                return 1;
        }
@@ -947,8 +1217,8 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
                pptr = &commit_list_insert(lookup_commit(head_sha1), pptr)->next;
                fp = fopen(git_path("MERGE_HEAD"), "r");
                if (fp == NULL)
-                       die("could not open %s for reading: %s",
-                           git_path("MERGE_HEAD"), strerror(errno));
+                       die_errno("could not open '%s' for reading",
+                                 git_path("MERGE_HEAD"));
                while (strbuf_getline(&m, fp, '\n') != EOF) {
                        unsigned char sha1[20];
                        if (get_sha1_hex(m.buf, sha1) < 0)
@@ -959,8 +1229,7 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
                strbuf_release(&m);
                if (!stat(git_path("MERGE_MODE"), &statbuf)) {
                        if (strbuf_read_file(&sb, git_path("MERGE_MODE"), 0) < 0)
-                               die("could not read MERGE_MODE: %s",
-                                               strerror(errno));
+                               die_errno("could not read MERGE_MODE");
                        if (!strcmp(sb.buf, "no-ff"))
                                allow_fast_forward = 0;
                }
@@ -974,8 +1243,9 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
        /* Finally, get the commit message */
        strbuf_reset(&sb);
        if (strbuf_read_file(&sb, git_path(commit_editmsg), 0) < 0) {
+               int saved_errno = errno;
                rollback_index_files();
-               die("could not read commit message");
+               die("could not read commit message: %s", strerror(saved_errno));
        }
 
        /* Truncate the message just before the diff, if any. */
@@ -1031,7 +1301,7 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
                     "new_index file. Check that disk is not full or quota is\n"
                     "not exceeded, and then \"git reset HEAD\" to recover.");
 
-       rerere();
+       rerere(0);
        run_hook(get_index_file(), "post-commit", NULL);
        if (!quiet)
                print_summary(prefix, commit_sha1);