checkout_merged(): squelch false warning from some gcc
[gitweb.git] / builtin / commit.c
index 472c2baed04f549fb1a3c429a2c36747e8229c68..67757e999fba514b62767d3351031e9eb6ef8c10 100644 (file)
@@ -38,7 +38,7 @@ static const char * const builtin_status_usage[] = {
 };
 
 static const char implicit_ident_advice[] =
-"Your name and email address were configured automatically based\n"
+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"
@@ -47,16 +47,24 @@ static const char implicit_ident_advice[] =
 "\n"
 "After doing this, you may fix the identity used for this commit with:\n"
 "\n"
-"    git commit --amend --reset-author\n";
+"    git commit --amend --reset-author\n");
 
 static const char empty_amend_advice[] =
-"You asked to amend the most recent commit, but doing so would make\n"
+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"
-"remove the commit entirely with \"git reset HEAD^\".\n";
+"remove the commit entirely with \"git reset HEAD^\".\n");
+
+static const char empty_cherry_pick_advice[] =
+N_("The previous cherry-pick is now empty, possibly due to conflict resolution.\n"
+"If you wish to commit it anyway, use:\n"
+"\n"
+"    git commit --allow-empty\n"
+"\n"
+"Otherwise, please use 'git reset'\n");
 
 static unsigned char head_sha1[20];
 
-static char *use_message_buffer;
+static const char *use_message_buffer;
 static const char commit_editmsg[] = "COMMIT_EDITMSG";
 static struct lock_file index_lock; /* real index */
 static struct lock_file false_lock; /* used only for partial commits */
@@ -68,6 +76,11 @@ static enum {
 
 static const char *logfile, *force_author;
 static const char *template_file;
+/*
+ * The _message variables are commit names from which to take
+ * the commit message and/or authorship.
+ */
+static const char *author_message, *author_message_buffer;
 static char *edit_message, *use_message;
 static char *fixup_message, *squash_message;
 static int all, edit_flag, also, interactive, only, amend, signoff;
@@ -88,7 +101,8 @@ static enum {
 } cleanup_mode;
 static char *cleanup_arg;
 
-static int use_editor = 1, initial_commit, in_merge, include_status = 1;
+static enum commit_whence whence;
+static int use_editor = 1, initial_commit, include_status = 1;
 static int show_ignored_in_status;
 static const char *only_include_assumed;
 static struct strbuf message;
@@ -119,13 +133,13 @@ static struct option builtin_commit_options[] = {
 
        OPT_GROUP("Commit message options"),
        OPT_FILENAME('F', "file", &logfile, "read message 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", "commit message", opt_parse_m),
-       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_STRING(0, "fixup", &fixup_message, "COMMIT", "use autosquash formatted message to fixup specified commit"),
-       OPT_STRING(0, "squash", &squash_message, "COMMIT", "use autosquash formatted message to squash specified commit"),
+       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", "commit message", opt_parse_m),
+       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_STRING(0, "fixup", &fixup_message, "commit", "use autosquash formatted message to fixup specified commit"),
+       OPT_STRING(0, "squash", &squash_message, "commit", "use autosquash formatted message to squash 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"),
@@ -163,6 +177,36 @@ static struct option builtin_commit_options[] = {
        OPT_END()
 };
 
+static void determine_whence(struct wt_status *s)
+{
+       if (file_exists(git_path("MERGE_HEAD")))
+               whence = FROM_MERGE;
+       else if (file_exists(git_path("CHERRY_PICK_HEAD")))
+               whence = FROM_CHERRY_PICK;
+       else
+               whence = FROM_COMMIT;
+       if (s)
+               s->whence = whence;
+}
+
+static const char *whence_s(void)
+{
+       char *s = "";
+
+       switch (whence) {
+       case FROM_COMMIT:
+               break;
+       case FROM_MERGE:
+               s = "merge";
+               break;
+       case FROM_CHERRY_PICK:
+               s = "cherry-pick";
+               break;
+       }
+
+       return s;
+}
+
 static void rollback_index_files(void)
 {
        switch (commit_style) {
@@ -378,8 +422,8 @@ static char *prepare_index(int argc, const char **argv, const char *prefix, int
         */
        commit_style = COMMIT_PARTIAL;
 
-       if (in_merge)
-               die(_("cannot do a partial commit during a merge."));
+       if (whence != FROM_COMMIT)
+               die(_("cannot do a partial commit during a %s."), whence_s());
 
        memset(&partial, 0, sizeof(partial));
        partial.strdup_strings = 1;
@@ -469,18 +513,18 @@ static void determine_author_info(struct strbuf *author_ident)
        email = getenv("GIT_AUTHOR_EMAIL");
        date = getenv("GIT_AUTHOR_DATE");
 
-       if (use_message && !renew_authorship) {
+       if (author_message) {
                const char *a, *lb, *rb, *eol;
 
-               a = strstr(use_message_buffer, "\nauthor ");
+               a = strstr(author_message_buffer, "\nauthor ");
                if (!a)
-                       die(_("invalid commit: %s"), use_message);
+                       die(_("invalid commit: %s"), author_message);
 
                lb = strchrnul(a + strlen("\nauthor "), '<');
                rb = strchrnul(lb, '>');
                eol = strchrnul(rb, '\n');
                if (!*lb || !*rb || !*eol)
-                       die(_("invalid commit: %s"), use_message);
+                       die(_("invalid commit: %s"), author_message);
 
                if (lb == a + strlen("\nauthor "))
                        /* \nauthor <foo@example.com> */
@@ -633,18 +677,22 @@ static int prepare_to_commit(const char *index_file, const char *prefix,
                if (strbuf_read_file(&sb, git_path("SQUASH_MSG"), 0) < 0)
                        die_errno(_("could not read SQUASH_MSG"));
                hook_arg1 = "squash";
-       } else if (template_file && !stat(template_file, &statbuf)) {
+       } else if (template_file) {
                if (strbuf_read_file(&sb, template_file, 0) < 0)
                        die_errno(_("could not read '%s'"), template_file);
                hook_arg1 = "template";
        }
 
        /*
-        * This final case does not modify the template message,
-        * it just sets the argument to the prepare-commit-msg hook.
+        * The remaining cases don't modify the template message, but
+        * just set the argument(s) to the prepare-commit-msg hook.
         */
-       else if (in_merge)
+       else if (whence == FROM_MERGE)
                hook_arg1 = "merge";
+       else if (whence == FROM_CHERRY_PICK) {
+               hook_arg1 = "commit";
+               hook_arg2 = "CHERRY_PICK_HEAD";
+       }
 
        if (squash_message) {
                /*
@@ -693,30 +741,33 @@ static int prepare_to_commit(const char *index_file, const char *prefix,
        strbuf_addstr(&committer_ident, git_committer_info(0));
        if (use_editor && include_status) {
                char *ai_tmp, *ci_tmp;
-               if (in_merge)
+               if (whence != FROM_COMMIT)
                        status_printf_ln(s, GIT_COLOR_NORMAL,
-                               "\n"
-                               "It looks like you may be committing a MERGE.\n"
+                               _("\n"
+                               "It looks like you may be committing a %s.\n"
                                "If this is not correct, please remove the file\n"
                                "       %s\n"
                                "and try again.\n"
-                               "",
-                               git_path("MERGE_HEAD"));
+                               ""),
+                               whence_s(),
+                               git_path(whence == FROM_MERGE
+                                        ? "MERGE_HEAD"
+                                        : "CHERRY_PICK_HEAD"));
 
                fprintf(s->fp, "\n");
                status_printf(s, GIT_COLOR_NORMAL,
-                       "Please enter the commit message for your changes.");
+                       _("Please enter the commit message for your changes."));
                if (cleanup_mode == CLEANUP_ALL)
                        status_printf_more(s, GIT_COLOR_NORMAL,
-                               " Lines starting\n"
+                               _(" Lines starting\n"
                                "with '#' will be ignored, and an empty"
-                               " message aborts the commit.\n");
+                               " message aborts the commit.\n"));
                else /* CLEANUP_SPACE, that is. */
                        status_printf_more(s, GIT_COLOR_NORMAL,
-                               " Lines starting\n"
+                               _(" Lines starting\n"
                                "with '#' will be kept; you may remove them"
                                " yourself if you want to.\n"
-                               "An empty message aborts the commit.\n");
+                               "An empty message aborts the commit.\n"));
                if (only_include_assumed)
                        status_printf_ln(s, GIT_COLOR_NORMAL,
                                        "%s", only_include_assumed);
@@ -725,15 +776,15 @@ static int prepare_to_commit(const char *index_file, const char *prefix,
                ci_tmp = cut_ident_timestamp_part(committer_ident.buf);
                if (strcmp(author_ident->buf, committer_ident.buf))
                        status_printf_ln(s, GIT_COLOR_NORMAL,
-                               "%s"
-                               "Author:    %s",
+                               _("%s"
+                               "Author:    %s"),
                                ident_shown++ ? "" : "\n",
                                author_ident->buf);
 
                if (!user_ident_sufficiently_given())
                        status_printf_ln(s, GIT_COLOR_NORMAL,
-                               "%s"
-                               "Committer: %s",
+                               _("%s"
+                               "Committer: %s"),
                                ident_shown++ ? "" : "\n",
                                committer_ident.buf);
 
@@ -766,11 +817,18 @@ static int prepare_to_commit(const char *index_file, const char *prefix,
 
        fclose(s->fp);
 
-       if (!commitable && !in_merge && !allow_empty &&
+       /*
+        * Reject an attempt to record a non-merge empty commit without
+        * 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 &&
            !(amend && is_a_merge(head_sha1))) {
                run_status(stdout, index_file, prefix, 0, s);
                if (amend)
-                       fputs(empty_amend_advice, stderr);
+                       fputs(_(empty_amend_advice), stderr);
+               else if (whence == FROM_CHERRY_PICK)
+                       fputs(_(empty_cherry_pick_advice), stderr);
                return 0;
        }
 
@@ -898,6 +956,28 @@ static void handle_untracked_files_arg(struct wt_status *s)
                die(_("Invalid untracked files mode '%s'"), untracked_files_arg);
 }
 
+static const char *read_commit_message(const char *name)
+{
+       const char *out_enc, *out;
+       struct commit *commit;
+
+       commit = lookup_commit_reference_by_name(name);
+       if (!commit)
+               die(_("could not lookup commit %s"), name);
+       out_enc = get_commit_output_encoding();
+       out = logmsg_reencode(commit, out_enc);
+
+       /*
+        * If we failed to reencode the buffer, just copy it
+        * byte for byte so the user can try to fix it up.
+        * This also handles the case where input and output
+        * encodings are identical.
+        */
+       if (out == NULL)
+               out = xstrdup(commit->buffer);
+       return out;
+}
+
 static int parse_and_validate_options(int argc, const char *argv[],
                                      const char * const usage[],
                                      const char *prefix,
@@ -927,10 +1007,10 @@ static int parse_and_validate_options(int argc, const char *argv[],
        /* Sanity check options */
        if (amend && initial_commit)
                die(_("You have nothing to amend."));
-       if (amend && in_merge)
-               die("You are in the middle of a merge -- cannot amend.");
+       if (amend && whence != FROM_COMMIT)
+               die(_("You are in the middle of a %s -- cannot amend."), whence_s());
        if (fixup_message && squash_message)
-               die("Options --squash and --fixup cannot be used together");
+               die(_("Options --squash and --fixup cannot be used together"));
        if (use_message)
                f++;
        if (edit_message)
@@ -947,26 +1027,18 @@ static int parse_and_validate_options(int argc, const char *argv[],
                use_message = edit_message;
        if (amend && !use_message && !fixup_message)
                use_message = "HEAD";
-       if (!use_message && renew_authorship)
+       if (!use_message && whence != FROM_CHERRY_PICK && renew_authorship)
                die(_("--reset-author can be used only with -C, -c or --amend."));
        if (use_message) {
-               const char *out_enc;
-               struct commit *commit;
-
-               commit = lookup_commit_reference_by_name(use_message);
-               if (!commit)
-                       die(_("could not lookup commit %s"), use_message);
-               out_enc = get_commit_output_encoding();
-               use_message_buffer = logmsg_reencode(commit, out_enc);
-
-               /*
-                * If we failed to reencode the buffer, just copy it
-                * byte for byte so the user can try to fix it up.
-                * This also handles the case where input and output
-                * encodings are identical.
-                */
-               if (use_message_buffer == NULL)
-                       use_message_buffer = xstrdup(commit->buffer);
+               use_message_buffer = read_commit_message(use_message);
+               if (!renew_authorship) {
+                       author_message = use_message;
+                       author_message_buffer = use_message_buffer;
+               }
+       }
+       if (whence == FROM_CHERRY_PICK && !renew_authorship) {
+               author_message = "CHERRY_PICK_HEAD";
+               author_message_buffer = read_commit_message(author_message);
        }
 
        if (!!also + !!only + !!all + !!interactive > 1)
@@ -1117,7 +1189,7 @@ int cmd_status(int argc, const char **argv, const char *prefix)
        wt_status_prepare(&s);
        gitmodules_config();
        git_config(git_status_config, &s);
-       in_merge = file_exists(git_path("MERGE_HEAD"));
+       determine_whence(&s);
        argc = parse_options(argc, argv, prefix,
                             builtin_status_options,
                             builtin_status_usage, 0);
@@ -1131,16 +1203,10 @@ int cmd_status(int argc, const char **argv, const char *prefix)
        refresh_index(&the_index, REFRESH_QUIET|REFRESH_UNMERGED, s.pathspec, NULL, NULL);
 
        fd = hold_locked_index(&index_lock, 0);
-       if (0 <= fd) {
-               if (active_cache_changed &&
-                   !write_cache(fd, active_cache, active_nr))
-                       commit_locked_index(&index_lock);
-               else
-                       rollback_lock_file(&index_lock);
-       }
+       if (0 <= fd)
+               update_index_if_able(&the_index, &index_lock);
 
        s.is_initial = get_sha1(s.reference, sha1) ? 1 : 0;
-       s.in_merge = in_merge;
        s.ignore_submodule_arg = ignore_submodule_arg;
        wt_status_collect(&s);
 
@@ -1197,7 +1263,7 @@ static void print_summary(const char *prefix, const unsigned char *sha1)
                strbuf_addbuf_percentquote(&format, &committer_ident);
                if (advice_implicit_identity) {
                        strbuf_addch(&format, '\n');
-                       strbuf_addstr(&format, implicit_ident_advice);
+                       strbuf_addstr(&format, _(implicit_ident_advice));
                }
        }
        strbuf_release(&author_ident);
@@ -1215,7 +1281,6 @@ static void print_summary(const char *prefix, const unsigned char *sha1)
        get_commit_format(format.buf, &rev);
        rev.always_show_header = 0;
        rev.diffopt.detect_rename = 1;
-       rev.diffopt.rename_limit = 100;
        rev.diffopt.break_opt = 0;
        diff_setup_done(&rev.diffopt);
 
@@ -1223,9 +1288,9 @@ static void print_summary(const char *prefix, const unsigned char *sha1)
                !prefixcmp(head, "refs/heads/") ?
                        head + 11 :
                        !strcmp(head, "HEAD") ?
-                               "detached HEAD" :
+                               _("detached HEAD") :
                                head,
-               initial_commit ? " (root-commit)" : "");
+               initial_commit ? _(" (root-commit)") : "");
 
        if (!log_tree_commit(&rev, commit)) {
                rev.always_show_header = 1;
@@ -1302,8 +1367,7 @@ 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;
+       determine_whence(&s);
 
        if (s.use_color == -1)
                s.use_color = git_use_color_default;
@@ -1340,7 +1404,7 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
 
                for (c = commit->parents; c; c = c->next)
                        pptr = &commit_list_insert(c->item, pptr)->next;
-       } else if (in_merge) {
+       } else if (whence == FROM_MERGE) {
                struct strbuf m = STRBUF_INIT;
                FILE *fp;
 
@@ -1369,7 +1433,9 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
                        parents = reduce_heads(parents);
        } else {
                if (!reflog_msg)
-                       reflog_msg = "commit";
+                       reflog_msg = (whence == FROM_CHERRY_PICK)
+                                       ? "commit (cherry-pick)"
+                                       : "commit";
                pptr = &commit_list_insert(lookup_commit(head_sha1), pptr)->next;
        }
 
@@ -1424,6 +1490,7 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
                die(_("cannot update HEAD ref"));
        }
 
+       unlink(git_path("CHERRY_PICK_HEAD"));
        unlink(git_path("MERGE_HEAD"));
        unlink(git_path("MERGE_MSG"));
        unlink(git_path("MERGE_MODE"));