Code

branch: allow a no-op "branch -M <current-branch> HEAD"
[git.git] / builtin / commit.c
index 67757e999fba514b62767d3351031e9eb6ef8c10..8f2bebecf313a0e4b742f9327ec178c7e3547dd2 100644 (file)
@@ -62,8 +62,6 @@ N_("The previous cherry-pick is now empty, possibly due to conflict resolution.\
 "\n"
 "Otherwise, please use 'git reset'\n");
 
-static unsigned char head_sha1[20];
-
 static const char *use_message_buffer;
 static const char commit_editmsg[] = "COMMIT_EDITMSG";
 static struct lock_file index_lock; /* real index */
@@ -83,7 +81,7 @@ static const char *template_file;
 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;
+static int all, edit_flag, also, interactive, patch_interactive, only, amend, signoff;
 static int quiet, verbose, no_verify, allow_empty, dry_run, renew_authorship;
 static int no_post_rewrite, allow_empty_message;
 static char *untracked_files_arg, *force_date, *ignore_submodule_arg;
@@ -102,7 +100,7 @@ static enum {
 static char *cleanup_arg;
 
 static enum commit_whence whence;
-static int use_editor = 1, initial_commit, include_status = 1;
+static int use_editor = 1, include_status = 1;
 static int show_ignored_in_status;
 static const char *only_include_assumed;
 static struct strbuf message;
@@ -152,6 +150,7 @@ static struct option builtin_commit_options[] = {
        OPT_BOOLEAN('a', "all", &all, "commit all changed files"),
        OPT_BOOLEAN('i', "include", &also, "add specified files to index for commit"),
        OPT_BOOLEAN(0, "interactive", &interactive, "interactively add files"),
+       OPT_BOOLEAN('p', "patch", &patch_interactive, "interactively add changes"),
        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"),
@@ -255,8 +254,11 @@ static int list_paths(struct string_list *list, const char *with_tree,
                ;
        m = xcalloc(1, i);
 
-       if (with_tree)
-               overlay_tree_on_cache(with_tree, prefix);
+       if (with_tree) {
+               char *max_prefix = common_prefix(pattern);
+               overlay_tree_on_cache(with_tree, max_prefix ? max_prefix : prefix);
+               free(max_prefix);
+       }
 
        for (i = 0; i < active_nr; i++) {
                struct cache_entry *ce = active_cache[i];
@@ -271,7 +273,7 @@ static int list_paths(struct string_list *list, const char *with_tree,
                        item->util = item; /* better a valid pointer than a fake one */
        }
 
-       return report_path_error(m, pattern, prefix ? strlen(prefix) : 0);
+       return report_path_error(m, pattern, prefix);
 }
 
 static void add_remove_files(struct string_list *list)
@@ -293,13 +295,13 @@ static void add_remove_files(struct string_list *list)
        }
 }
 
-static void create_base_index(void)
+static void create_base_index(const struct commit *current_head)
 {
        struct tree *tree;
        struct unpack_trees_options opts;
        struct tree_desc t;
 
-       if (initial_commit) {
+       if (!current_head) {
                discard_cache();
                return;
        }
@@ -312,7 +314,7 @@ static void create_base_index(void)
        opts.dst_index = &the_index;
 
        opts.fn = oneway_merge;
-       tree = parse_tree_indirect(head_sha1);
+       tree = parse_tree_indirect(current_head->object.sha1);
        if (!tree)
                die(_("failed to unpack HEAD tree object"));
        parse_tree(tree);
@@ -331,23 +333,17 @@ static void refresh_cache_or_die(int refresh_flags)
                die_resolve_conflict("commit");
 }
 
-static char *prepare_index(int argc, const char **argv, const char *prefix, int is_status)
+static char *prepare_index(int argc, const char **argv, const char *prefix,
+                          const struct commit *current_head, int is_status)
 {
        int fd;
        struct string_list partial;
        const char **pathspec = NULL;
+       char *old_index_env = 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"));
-               if (read_cache_preload(NULL) < 0)
-                       die(_("index file corrupt"));
-               commit_style = COMMIT_AS_IS;
-               return get_index_file();
-       }
 
        if (*argv)
                pathspec = get_pathspec(prefix, argv);
@@ -355,6 +351,33 @@ static char *prepare_index(int argc, const char **argv, const char *prefix, int
        if (read_cache_preload(pathspec) < 0)
                die(_("index file corrupt"));
 
+       if (interactive) {
+               fd = hold_locked_index(&index_lock, 1);
+
+               refresh_cache_or_die(refresh_flags);
+
+               if (write_cache(fd, active_cache, active_nr) ||
+                   close_lock_file(&index_lock))
+                       die(_("unable to create temporary index"));
+
+               old_index_env = getenv(INDEX_ENVIRONMENT);
+               setenv(INDEX_ENVIRONMENT, index_lock.filename, 1);
+
+               if (interactive_add(argc, argv, prefix, patch_interactive) != 0)
+                       die(_("interactive add failed"));
+
+               if (old_index_env && *old_index_env)
+                       setenv(INDEX_ENVIRONMENT, old_index_env, 1);
+               else
+                       unsetenv(INDEX_ENVIRONMENT);
+
+               discard_cache();
+               read_cache_from(index_lock.filename);
+
+               commit_style = COMMIT_NORMAL;
+               return index_lock.filename;
+       }
+
        /*
         * Non partial, non as-is commit.
         *
@@ -427,7 +450,7 @@ static char *prepare_index(int argc, const char **argv, const char *prefix, int
 
        memset(&partial, 0, sizeof(partial));
        partial.strdup_strings = 1;
-       if (list_paths(&partial, initial_commit ? NULL : "HEAD", prefix, pathspec))
+       if (list_paths(&partial, !current_head ? NULL : "HEAD", prefix, pathspec))
                exit(1);
 
        discard_cache();
@@ -446,7 +469,7 @@ static char *prepare_index(int argc, const char **argv, const char *prefix, int
                                                (uintmax_t) getpid()),
                                       LOCK_DIE_ON_ERROR);
 
-       create_base_index();
+       create_base_index(current_head);
        add_remove_files(&partial);
        refresh_cache(REFRESH_QUIET);
 
@@ -495,12 +518,9 @@ static int run_status(FILE *fp, const char *index_file, const char *prefix, int
        return s->commitable;
 }
 
-static int is_a_merge(const unsigned char *sha1)
+static int is_a_merge(const struct commit *current_head)
 {
-       struct commit *commit = lookup_commit(sha1);
-       if (!commit || parse_commit(commit))
-               die(_("could not parse HEAD commit"));
-       return !!(commit->parents && commit->parents->next);
+       return !!(current_head->parents && current_head->parents->next);
 }
 
 static const char sign_off_header[] = "Signed-off-by: ";
@@ -604,6 +624,7 @@ static char *cut_ident_timestamp_part(char *string)
 }
 
 static int prepare_to_commit(const char *index_file, const char *prefix,
+                            struct commit *current_head,
                             struct wt_status *s,
                             struct strbuf *author_ident)
 {
@@ -615,6 +636,7 @@ static int prepare_to_commit(const char *index_file, const char *prefix,
        const char *hook_arg1 = NULL;
        const char *hook_arg2 = NULL;
        int ident_shown = 0;
+       int clean_message_contents = (cleanup_mode != CLEANUP_NONE);
 
        if (!no_verify && run_hook(index_file, "pre-commit", NULL))
                return 0;
@@ -681,6 +703,7 @@ static int prepare_to_commit(const char *index_file, const char *prefix,
                if (strbuf_read_file(&sb, template_file, 0) < 0)
                        die_errno(_("could not read '%s'"), template_file);
                hook_arg1 = "template";
+               clean_message_contents = 0;
        }
 
        /*
@@ -708,7 +731,7 @@ static int prepare_to_commit(const char *index_file, const char *prefix,
        if (s->fp == NULL)
                die_errno(_("could not open '%s'"), git_path(commit_editmsg));
 
-       if (cleanup_mode != CLEANUP_NONE)
+       if (clean_message_contents)
                stripspace(&sb, 0);
 
        if (signoff) {
@@ -823,7 +846,7 @@ static int prepare_to_commit(const char *index_file, const char *prefix,
         * empty due to conflict resolution, which the user should okay.
         */
        if (!commitable && whence != FROM_MERGE && !allow_empty &&
-           !(amend && is_a_merge(head_sha1))) {
+           !(amend && is_a_merge(current_head))) {
                run_status(stdout, index_file, prefix, 0, s);
                if (amend)
                        fputs(_(empty_amend_advice), stderr);
@@ -981,6 +1004,7 @@ static const char *read_commit_message(const char *name)
 static int parse_and_validate_options(int argc, const char *argv[],
                                      const char * const usage[],
                                      const char *prefix,
+                                     struct commit *current_head,
                                      struct wt_status *s)
 {
        int f = 0;
@@ -1001,11 +1025,8 @@ static int parse_and_validate_options(int argc, const char *argv[],
        if (!use_editor)
                setenv("GIT_EDITOR", ":", 1);
 
-       if (get_sha1("HEAD", head_sha1))
-               initial_commit = 1;
-
        /* Sanity check options */
-       if (amend && initial_commit)
+       if (amend && !current_head)
                die(_("You have nothing to amend."));
        if (amend && whence != FROM_COMMIT)
                die(_("You are in the middle of a %s -- cannot amend."), whence_s());
@@ -1041,8 +1062,11 @@ static int parse_and_validate_options(int argc, const char *argv[],
                author_message_buffer = read_commit_message(author_message);
        }
 
+       if (patch_interactive)
+               interactive = 1;
+
        if (!!also + !!only + !!all + !!interactive > 1)
-               die(_("Only one of --include/--only/--all/--interactive can be used."));
+               die(_("Only one of --include/--only/--all/--interactive/--patch can be used."));
        if (argc == 0 && (also || (only && !amend)))
                die(_("No paths with --include/--only does not make sense."));
        if (argc == 0 && only && amend)
@@ -1064,8 +1088,6 @@ static int parse_and_validate_options(int argc, const char *argv[],
 
        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;
@@ -1076,12 +1098,12 @@ static int parse_and_validate_options(int argc, const char *argv[],
 }
 
 static int dry_run_commit(int argc, const char **argv, const char *prefix,
-                         struct wt_status *s)
+                         const struct commit *current_head, struct wt_status *s)
 {
        int commitable;
        const char *index_file;
 
-       index_file = prepare_index(argc, argv, prefix, 1);
+       index_file = prepare_index(argc, argv, prefix, current_head, 1);
        commitable = run_status(stdout, index_file, prefix, 0, s);
        rollback_index_files();
 
@@ -1120,7 +1142,7 @@ static int git_status_config(const char *k, const char *v, void *cb)
                return 0;
        }
        if (!strcmp(k, "status.color") || !strcmp(k, "color.status")) {
-               s->use_color = git_config_colorbool(k, v, -1);
+               s->use_color = git_config_colorbool(k, v);
                return 0;
        }
        if (!prefixcmp(k, "status.color.") || !prefixcmp(k, "color.status.")) {
@@ -1183,9 +1205,6 @@ int cmd_status(int argc, const char **argv, const char *prefix)
        if (argc == 2 && !strcmp(argv[1], "-h"))
                usage_with_options(builtin_status_usage, builtin_status_options);
 
-       if (null_termination && status_format == STATUS_FORMAT_LONG)
-               status_format = STATUS_FORMAT_PORCELAIN;
-
        wt_status_prepare(&s);
        gitmodules_config();
        git_config(git_status_config, &s);
@@ -1193,6 +1212,10 @@ int cmd_status(int argc, const char **argv, const char *prefix)
        argc = parse_options(argc, argv, prefix,
                             builtin_status_options,
                             builtin_status_usage, 0);
+
+       if (null_termination && status_format == STATUS_FORMAT_LONG)
+               status_format = STATUS_FORMAT_PORCELAIN;
+
        handle_untracked_files_arg(&s);
        if (show_ignored_in_status)
                s.show_ignored_files = 1;
@@ -1212,10 +1235,6 @@ int cmd_status(int argc, const char **argv, const char *prefix)
 
        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:
@@ -1233,7 +1252,8 @@ int cmd_status(int argc, const char **argv, const char *prefix)
        return 0;
 }
 
-static void print_summary(const char *prefix, const unsigned char *sha1)
+static void print_summary(const char *prefix, const unsigned char *sha1,
+                         int initial_commit)
 {
        struct rev_info rev;
        struct commit *commit;
@@ -1355,12 +1375,13 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
        struct strbuf author_ident = STRBUF_INIT;
        const char *index_file, *reflog_msg;
        char *nl, *p;
-       unsigned char commit_sha1[20];
+       unsigned char sha1[20];
        struct ref_lock *ref_lock;
        struct commit_list *parents = NULL, **pptr = &parents;
        struct stat statbuf;
        int allow_fast_forward = 1;
        struct wt_status s;
+       struct commit *current_head = NULL;
 
        if (argc == 2 && !strcmp(argv[1], "-h"))
                usage_with_options(builtin_commit_usage, builtin_commit_options);
@@ -1369,48 +1390,47 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
        git_config(git_commit_config, &s);
        determine_whence(&s);
 
-       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);
+       if (get_sha1("HEAD", sha1))
+               current_head = NULL;
+       else {
+               current_head = lookup_commit_or_die(sha1, "HEAD");
+               if (!current_head || parse_commit(current_head))
+                       die(_("could not parse HEAD commit"));
        }
-       index_file = prepare_index(argc, argv, prefix, 0);
+       argc = parse_and_validate_options(argc, argv, builtin_commit_usage,
+                                         prefix, current_head, &s);
+       if (dry_run)
+               return dry_run_commit(argc, argv, prefix, current_head, &s);
+       index_file = prepare_index(argc, argv, prefix, current_head, 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, &s, &author_ident)) {
+       if (!prepare_to_commit(index_file, prefix,
+                              current_head, &s, &author_ident)) {
                rollback_index_files();
                return 1;
        }
 
        /* Determine parents */
        reflog_msg = getenv("GIT_REFLOG_ACTION");
-       if (initial_commit) {
+       if (!current_head) {
                if (!reflog_msg)
                        reflog_msg = "commit (initial)";
        } else if (amend) {
                struct commit_list *c;
-               struct commit *commit;
 
                if (!reflog_msg)
                        reflog_msg = "commit (amend)";
-               commit = lookup_commit(head_sha1);
-               if (!commit || parse_commit(commit))
-                       die(_("could not parse HEAD commit"));
-
-               for (c = commit->parents; c; c = c->next)
+               for (c = current_head->parents; c; c = c->next)
                        pptr = &commit_list_insert(c->item, pptr)->next;
        } else if (whence == FROM_MERGE) {
                struct strbuf m = STRBUF_INIT;
+               struct commit *commit;
                FILE *fp;
 
                if (!reflog_msg)
                        reflog_msg = "commit (merge)";
-               pptr = &commit_list_insert(lookup_commit(head_sha1), pptr)->next;
+               pptr = &commit_list_insert(current_head, pptr)->next;
                fp = fopen(git_path("MERGE_HEAD"), "r");
                if (fp == NULL)
                        die_errno(_("could not open '%s' for reading"),
@@ -1419,7 +1439,8 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
                        unsigned char sha1[20];
                        if (get_sha1_hex(m.buf, sha1) < 0)
                                die(_("Corrupt MERGE_HEAD file (%s)"), m.buf);
-                       pptr = &commit_list_insert(lookup_commit(sha1), pptr)->next;
+                       commit = lookup_commit_or_die(sha1, "MERGE_HEAD");
+                       pptr = &commit_list_insert(commit, pptr)->next;
                }
                fclose(fp);
                strbuf_release(&m);
@@ -1436,7 +1457,7 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
                        reflog_msg = (whence == FROM_CHERRY_PICK)
                                        ? "commit (cherry-pick)"
                                        : "commit";
-               pptr = &commit_list_insert(lookup_commit(head_sha1), pptr)->next;
+               pptr = &commit_list_insert(current_head, pptr)->next;
        }
 
        /* Finally, get the commit message */
@@ -1462,7 +1483,7 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
                exit(1);
        }
 
-       if (commit_tree(sb.buf, active_cache_tree->sha1, parents, commit_sha1,
+       if (commit_tree(sb.buf, active_cache_tree->sha1, parents, sha1,
                        author_ident.buf)) {
                rollback_index_files();
                die(_("failed to write commit object"));
@@ -1470,7 +1491,9 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
        strbuf_release(&author_ident);
 
        ref_lock = lock_any_ref_for_update("HEAD",
-                                          initial_commit ? NULL : head_sha1,
+                                          !current_head
+                                          ? NULL
+                                          : current_head->object.sha1,
                                           0);
 
        nl = strchr(sb.buf, '\n');
@@ -1485,12 +1508,13 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
                rollback_index_files();
                die(_("cannot lock HEAD ref"));
        }
-       if (write_ref_sha1(ref_lock, commit_sha1, sb.buf) < 0) {
+       if (write_ref_sha1(ref_lock, sha1, sb.buf) < 0) {
                rollback_index_files();
                die(_("cannot update HEAD ref"));
        }
 
        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"));
@@ -1507,13 +1531,14 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
                struct notes_rewrite_cfg *cfg;
                cfg = init_copy_notes_for_rewrite("amend");
                if (cfg) {
-                       copy_note_for_rewrite(cfg, head_sha1, commit_sha1);
+                       /* we are amending, so current_head is not NULL */
+                       copy_note_for_rewrite(cfg, current_head->object.sha1, sha1);
                        finish_copy_notes_for_rewrite(cfg);
                }
-               run_rewrite_hook(head_sha1, commit_sha1);
+               run_rewrite_hook(current_head->object.sha1, sha1);
        }
        if (!quiet)
-               print_summary(prefix, commit_sha1);
+               print_summary(prefix, sha1, !current_head);
 
        return 0;
 }