notes: implement helpers needed for note copying during rewrite
[gitweb.git] / builtin-commit.c
index 07cc76c04a4b7040a4fc9fe94744f13a1848c5ff..f476d85293a5e2a79273054dda87073815213328 100644 (file)
@@ -36,7 +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 */
@@ -52,8 +65,9 @@ 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, dry_run;
-static char *untracked_files_arg;
+static int quiet, verbose, no_verify, allow_empty, dry_run, renew_authorship;
+static int no_post_rewrite;
+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
@@ -68,7 +82,7 @@ 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;
 
@@ -94,16 +108,21 @@ static int opt_parse_m(const struct option *opt, const char *arg, int unset)
 static struct option builtin_commit_options[] = {
        OPT__QUIET(&quiet),
        OPT__VERBOSE(&verbose),
-       OPT_GROUP("Commit message options"),
 
+       OPT_GROUP("Commit message options"),
        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_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"),
        OPT_BOOLEAN('a', "all", &all, "commit all changed files"),
@@ -119,9 +138,10 @@ static struct option builtin_commit_options[] = {
        OPT_BOOLEAN('z', "null", &null_termination,
                    "terminate entries with NUL"),
        OPT_BOOLEAN(0, "amend", &amend, "amend previous commit"),
+       OPT_BOOLEAN(0, "no-post-rewrite", &no_post_rewrite, "bypass post-rewrite hook"),
        { 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"),
-       OPT_STRING(0, "cleanup", &cleanup_arg, "default", "how to strip spaces and #comments from message"),
+       /* end commit contents options */
 
        OPT_END()
 };
@@ -179,11 +199,15 @@ 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);
@@ -196,6 +220,10 @@ 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");
@@ -232,6 +260,16 @@ static void create_base_index(void)
                exit(128); /* We've already reported the error, finish dying */
 }
 
+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;
@@ -271,7 +309,7 @@ static char *prepare_index(int argc, const char **argv, const char *prefix, int
        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_flags);
+               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");
@@ -290,7 +328,7 @@ static char *prepare_index(int argc, const char **argv, const char *prefix, int
         */
        if (!pathspec || !*pathspec) {
                fd = hold_locked_index(&index_lock, 1);
-               refresh_cache(refresh_flags);
+               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");
@@ -319,7 +357,7 @@ static char *prepare_index(int argc, const char **argv, const char *prefix, int
         */
        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));
@@ -382,7 +420,7 @@ static int run_status(FILE *fp, const char *index_file, const char *prefix, int
                wt_shortstatus_print(s, null_termination);
                break;
        case STATUS_FORMAT_PORCELAIN:
-               wt_shortstatus_print(s, null_termination);
+               wt_porcelain_print(s, null_termination);
                break;
        case STATUS_FORMAT_LONG:
                wt_status_print(s);
@@ -410,7 +448,7 @@ 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 ");
@@ -438,11 +476,55 @@ 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 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)
 {
@@ -518,7 +600,7 @@ 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);
                }
@@ -534,7 +616,7 @@ 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;
 
@@ -576,7 +658,7 @@ 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",
@@ -713,8 +795,10 @@ 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);
@@ -748,6 +832,9 @@ static int parse_and_validate_options(int argc, const char *argv[],
        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)
@@ -758,9 +845,6 @@ 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.");
@@ -781,6 +865,8 @@ 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";
@@ -881,7 +967,7 @@ static int parse_status_slot(const char *var, int offset)
                return WT_STATUS_NOBRANCH;
        if (!strcasecmp(var+offset, "unmerged"))
                return WT_STATUS_UNMERGED;
-       die("bad config variable '%s'", var);
+       return -1;
 }
 
 static int git_status_config(const char *k, const char *v, void *cb)
@@ -901,6 +987,8 @@ static int git_status_config(const char *k, const char *v, void *cb)
        }
        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]);
@@ -951,6 +1039,7 @@ int cmd_status(int argc, const char **argv, const char *prefix)
 
        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);
@@ -960,31 +1049,27 @@ int cmd_status(int argc, const char **argv, const char *prefix)
                s.pathspec = get_pathspec(prefix, argv);
 
        read_cache();
-       refresh_cache(REFRESH_QUIET|REFRESH_UNMERGED);
+       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:
-               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;
                wt_shortstatus_print(&s, null_termination);
                break;
        case STATUS_FORMAT_PORCELAIN:
-               wt_shortstatus_print(&s, null_termination);
+               wt_porcelain_print(&s, null_termination);
                break;
        case STATUS_FORMAT_LONG:
                s.verbose = verbose;
-               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;
                wt_status_print(&s);
                break;
        }
@@ -995,9 +1080,12 @@ 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)
@@ -1005,6 +1093,25 @@ 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);
 
@@ -1015,7 +1122,7 @@ 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;
@@ -1031,11 +1138,14 @@ 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)
@@ -1043,11 +1153,49 @@ 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, s);
 }
 
+static const char post_rewrite_hook[] = "hooks/post-rewrite";
+
+static int run_rewrite_hook(const unsigned char *oldsha1,
+                           const unsigned char *newsha1)
+{
+       /* oldsha1 SP newsha1 LF NUL */
+       static char buf[2*40 + 3];
+       struct child_process proc;
+       const char *argv[3];
+       int code;
+       size_t n;
+
+       if (access(git_path(post_rewrite_hook), X_OK) < 0)
+               return 0;
+
+       argv[0] = git_path(post_rewrite_hook);
+       argv[1] = "amend";
+       argv[2] = NULL;
+
+       memset(&proc, 0, sizeof(proc));
+       proc.argv = argv;
+       proc.in = -1;
+       proc.stdout_to_stderr = 1;
+
+       code = start_command(&proc);
+       if (code)
+               return code;
+       n = snprintf(buf, sizeof(buf), "%s %s\n",
+                    sha1_to_hex(oldsha1), sha1_to_hex(newsha1));
+       write_in_full(proc.in, buf, n);
+       close(proc.in);
+       return finish_command(&proc);
+}
+
 int cmd_commit(int argc, const char **argv, const char *prefix)
 {
        struct strbuf sb = STRBUF_INIT;
@@ -1062,10 +1210,11 @@ int cmd_commit(int argc, const char **argv, const char *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) {
@@ -1188,8 +1337,11 @@ 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 (amend && !no_post_rewrite) {
+               run_rewrite_hook(head_sha1, commit_sha1);
+       }
        if (!quiet)
                print_summary(prefix, commit_sha1);