diff options
Diffstat (limited to 'builtin/commit.c')
| -rw-r--r-- | builtin/commit.c | 1674 |
1 files changed, 1674 insertions, 0 deletions
diff --git a/builtin/commit.c b/builtin/commit.c new file mode 100644 index 0000000000..a48a7fe59c --- /dev/null +++ b/builtin/commit.c @@ -0,0 +1,1674 @@ +/* + * Builtin "git commit" + * + * Copyright (c) 2007 Kristian Høgsberg <krh@redhat.com> + * Based on git-commit.sh by Junio C Hamano and Linus Torvalds + */ + +#include "cache.h" +#include "cache-tree.h" +#include "color.h" +#include "dir.h" +#include "builtin.h" +#include "diff.h" +#include "diffcore.h" +#include "commit.h" +#include "revision.h" +#include "wt-status.h" +#include "run-command.h" +#include "refs.h" +#include "log-tree.h" +#include "strbuf.h" +#include "utf8.h" +#include "parse-options.h" +#include "string-list.h" +#include "rerere.h" +#include "unpack-trees.h" +#include "quote.h" +#include "submodule.h" +#include "gpg-interface.h" +#include "column.h" +#include "sequencer.h" +#include "notes-utils.h" +#include "mailmap.h" + +static const char * const builtin_commit_usage[] = { + N_("git commit [options] [--] <pathspec>..."), + NULL +}; + +static const char * const builtin_status_usage[] = { + N_("git status [options] [--] <pathspec>..."), + NULL +}; + +static const char implicit_ident_advice[] = +N_("Your name and email address were configured automatically based\n" +"on your username and hostname. Please check that they are accurate.\n" +"You can suppress this message by setting them explicitly:\n" +"\n" +" git config --global user.name \"Your Name\"\n" +" git config --global user.email you@example.com\n" +"\n" +"After doing this, you may fix the identity used for this commit with:\n" +"\n" +" git commit --amend --reset-author\n"); + +static const char empty_amend_advice[] = +N_("You asked to amend the most recent commit, but doing so would make\n" +"it empty. You can repeat your command with --allow-empty, or you can\n" +"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"); + +static const char empty_cherry_pick_advice_single[] = +N_("Otherwise, please use 'git reset'\n"); + +static const char empty_cherry_pick_advice_multi[] = +N_("If you wish to skip this commit, use:\n" +"\n" +" git reset\n" +"\n" +"Then \"git cherry-pick --continue\" will resume cherry-picking\n" +"the remaining commits.\n"); + +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 */ +static enum { + COMMIT_AS_IS = 1, + COMMIT_NORMAL, + COMMIT_PARTIAL +} commit_style; + +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, also, interactive, patch_interactive, only, amend, signoff; +static int edit_flag = -1; /* unspecified */ +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; +static char *sign_commit; + +/* + * The default commit message cleanup mode will remove the lines + * beginning with # (shell comments) and leading and trailing + * whitespaces (empty lines or containing only whitespaces) + * if editor is used, and only the whitespaces if the message + * is specified explicitly. + */ +static enum { + CLEANUP_SPACE, + CLEANUP_NONE, + CLEANUP_ALL +} cleanup_mode; +static const char *cleanup_arg; + +static enum commit_whence whence; +static int sequencer_in_use; +static int use_editor = 1, include_status = 1; +static int show_ignored_in_status, have_option_m; +static const char *only_include_assumed; +static struct strbuf message = STRBUF_INIT; + +static enum status_format { + STATUS_FORMAT_NONE = 0, + STATUS_FORMAT_LONG, + STATUS_FORMAT_SHORT, + STATUS_FORMAT_PORCELAIN, + + STATUS_FORMAT_UNSPECIFIED +} status_format = STATUS_FORMAT_UNSPECIFIED; + +static int opt_parse_m(const struct option *opt, const char *arg, int unset) +{ + struct strbuf *buf = opt->value; + if (unset) { + have_option_m = 0; + strbuf_setlen(buf, 0); + } else { + have_option_m = 1; + if (buf->len) + strbuf_addch(buf, '\n'); + strbuf_addstr(buf, arg); + strbuf_complete_line(buf); + } + return 0; +} + +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; + if (file_exists(git_path("sequencer"))) + sequencer_in_use = 1; + } + else + whence = FROM_COMMIT; + if (s) + s->whence = whence; +} + +static void rollback_index_files(void) +{ + switch (commit_style) { + case COMMIT_AS_IS: + break; /* nothing to do */ + case COMMIT_NORMAL: + rollback_lock_file(&index_lock); + break; + case COMMIT_PARTIAL: + rollback_lock_file(&index_lock); + rollback_lock_file(&false_lock); + break; + } +} + +static int commit_index_files(void) +{ + int err = 0; + + switch (commit_style) { + case COMMIT_AS_IS: + break; /* nothing to do */ + case COMMIT_NORMAL: + err = commit_lock_file(&index_lock); + break; + case COMMIT_PARTIAL: + err = commit_lock_file(&index_lock); + rollback_lock_file(&false_lock); + break; + } + + return err; +} + +/* + * Take a union of paths in the index and the named tree (typically, "HEAD"), + * and return the paths that match the given pattern in list. + */ +static int list_paths(struct string_list *list, const char *with_tree, + const char *prefix, const char **pattern) +{ + int i; + char *m; + + if (!pattern) + return 0; + + for (i = 0; pattern[i]; i++) + ; + m = xcalloc(1, i); + + 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++) { + const 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; + item = string_list_insert(list, ce->name); + if (ce_skip_worktree(ce)) + item->util = item; /* better a valid pointer than a fake one */ + } + + return report_path_error(m, pattern, prefix); +} + +static void add_remove_files(struct string_list *list) +{ + int i; + for (i = 0; i < list->nr; i++) { + 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")); + } else + remove_file_from_cache(p->string); + } +} + +static void create_base_index(const struct commit *current_head) +{ + struct tree *tree; + struct unpack_trees_options opts; + struct tree_desc t; + + if (!current_head) { + discard_cache(); + return; + } + + memset(&opts, 0, sizeof(opts)); + opts.head_idx = 1; + opts.index_only = 1; + opts.merge = 1; + opts.src_index = &the_index; + opts.dst_index = &the_index; + + opts.fn = oneway_merge; + tree = parse_tree_indirect(current_head->object.sha1); + if (!tree) + die(_("failed to unpack HEAD tree object")); + parse_tree(tree); + init_tree_desc(&t, tree->buffer, tree->size); + if (unpack_trees(1, &t, &opts)) + 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, + 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 (*argv) + pathspec = get_pathspec(prefix, argv); + + 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. + * + * (1) get the real index; + * (2) update the_index as necessary; + * (3) write the_index out to the real index (still locked); + * (4) return the name of the locked index file. + * + * The caller should run hooks on the locked real index, and + * (A) if all goes well, commit the real index; + * (B) on failure, rollback the real index. + */ + if (all || (also && pathspec && *pathspec)) { + fd = hold_locked_index(&index_lock, 1); + add_files_to_cache(also ? prefix : NULL, pathspec, 0); + refresh_cache_or_die(refresh_flags); + update_main_cache_tree(WRITE_TREE_SILENT); + if (write_cache(fd, active_cache, active_nr) || + close_lock_file(&index_lock)) + die(_("unable to write new_index file")); + commit_style = COMMIT_NORMAL; + return index_lock.filename; + } + + /* + * As-is commit. + * + * (1) return the name of the real index file. + * + * The caller should run hooks on the real index, + * and create commit from the_index. + * We still need to refresh the index here. + */ + if (!only && (!pathspec || !*pathspec)) { + fd = hold_locked_index(&index_lock, 1); + refresh_cache_or_die(refresh_flags); + if (active_cache_changed) { + update_main_cache_tree(WRITE_TREE_SILENT); + if (write_cache(fd, active_cache, active_nr) || + commit_locked_index(&index_lock)) + die(_("unable to write new_index file")); + } else { + rollback_lock_file(&index_lock); + } + commit_style = COMMIT_AS_IS; + return get_index_file(); + } + + /* + * A partial commit. + * + * (0) find the set of affected paths; + * (1) get lock on the real index file; + * (2) update the_index with the given paths; + * (3) write the_index out to the real index (still locked); + * (4) get lock on the false index file; + * (5) reset the_index from HEAD; + * (6) update the_index the same way as (2); + * (7) write the_index out to the false index file; + * (8) return the name of the false index file (still locked); + * + * The caller should run hooks on the locked false index, and + * create commit from it. Then + * (A) if all goes well, commit the real index; + * (B) on failure, rollback the real index; + * In either case, rollback the false index. + */ + commit_style = COMMIT_PARTIAL; + + if (whence != FROM_COMMIT) { + if (whence == FROM_MERGE) + die(_("cannot do a partial commit during a merge.")); + else if (whence == FROM_CHERRY_PICK) + die(_("cannot do a partial commit during a cherry-pick.")); + } + + memset(&partial, 0, sizeof(partial)); + partial.strdup_strings = 1; + if (list_paths(&partial, !current_head ? NULL : "HEAD", prefix, pathspec)) + exit(1); + + discard_cache(); + if (read_cache() < 0) + die(_("cannot read the index")); + + fd = hold_locked_index(&index_lock, 1); + add_remove_files(&partial); + refresh_cache(REFRESH_QUIET); + if (write_cache(fd, active_cache, active_nr) || + close_lock_file(&index_lock)) + die(_("unable to write new_index file")); + + fd = hold_lock_file_for_update(&false_lock, + git_path("next-index-%"PRIuMAX, + (uintmax_t) getpid()), + LOCK_DIE_ON_ERROR); + + create_base_index(current_head); + add_remove_files(&partial); + refresh_cache(REFRESH_QUIET); + + if (write_cache(fd, active_cache, active_nr) || + close_lock_file(&false_lock)) + die(_("unable to write temporary index file")); + + discard_cache(); + read_cache_from(false_lock.filename); + + return false_lock.filename; +} + +static int run_status(FILE *fp, const char *index_file, const char *prefix, int nowarn, + struct wt_status *s) +{ + unsigned char sha1[20]; + + if (s->relative_paths) + s->prefix = prefix; + + if (amend) { + s->amend = 1; + s->reference = "HEAD^1"; + } + 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_collect(s); + + switch (status_format) { + case STATUS_FORMAT_SHORT: + wt_shortstatus_print(s); + break; + case STATUS_FORMAT_PORCELAIN: + wt_porcelain_print(s); + break; + case STATUS_FORMAT_UNSPECIFIED: + die("BUG: finalize_deferred_config() should have been called"); + break; + case STATUS_FORMAT_NONE: + case STATUS_FORMAT_LONG: + wt_status_print(s); + break; + } + + return s->commitable; +} + +static int is_a_merge(const struct commit *current_head) +{ + return !!(current_head->parents && current_head->parents->next); +} + +static void export_one(const char *var, const char *s, const char *e, int hack) +{ + struct strbuf buf = STRBUF_INIT; + if (hack) + strbuf_addch(&buf, hack); + strbuf_addf(&buf, "%.*s", (int)(e - s), s); + setenv(var, buf.buf, 1); + strbuf_release(&buf); +} + +static int sane_ident_split(struct ident_split *person) +{ + if (!person->name_begin || !person->name_end || + person->name_begin == person->name_end) + return 0; /* no human readable name */ + if (!person->mail_begin || !person->mail_end || + person->mail_begin == person->mail_end) + return 0; /* no usable mail */ + if (!person->date_begin || !person->date_end || + !person->tz_begin || !person->tz_end) + return 0; + return 1; +} + +static void determine_author_info(struct strbuf *author_ident) +{ + char *name, *email, *date; + struct ident_split author; + + name = getenv("GIT_AUTHOR_NAME"); + email = getenv("GIT_AUTHOR_EMAIL"); + date = getenv("GIT_AUTHOR_DATE"); + + if (author_message) { + const char *a, *lb, *rb, *eol; + size_t len; + + a = strstr(author_message_buffer, "\nauthor "); + if (!a) + 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"), author_message); + + if (lb == a + strlen("\nauthor ")) + /* \nauthor <foo@example.com> */ + name = xcalloc(1, 1); + else + name = xmemdupz(a + strlen("\nauthor "), + (lb - strlen(" ") - + (a + strlen("\nauthor ")))); + email = xmemdupz(lb + strlen("<"), rb - (lb + strlen("<"))); + len = eol - (rb + strlen("> ")); + date = xmalloc(len + 2); + *date = '@'; + memcpy(date + 1, rb + strlen("> "), len); + date[len + 1] = '\0'; + } + + if (force_author) { + const char *lb = strstr(force_author, " <"); + const char *rb = strchr(force_author, '>'); + + if (!lb || !rb) + die(_("malformed --author parameter")); + name = xstrndup(force_author, lb - force_author); + email = xstrndup(lb + 2, rb - (lb + 2)); + } + + if (force_date) + date = force_date; + strbuf_addstr(author_ident, fmt_ident(name, email, date, IDENT_STRICT)); + if (!split_ident_line(&author, author_ident->buf, author_ident->len) && + sane_ident_split(&author)) { + export_one("GIT_AUTHOR_NAME", author.name_begin, author.name_end, 0); + export_one("GIT_AUTHOR_EMAIL", author.mail_begin, author.mail_end, 0); + export_one("GIT_AUTHOR_DATE", author.date_begin, author.tz_end, '@'); + } +} + +static char *cut_ident_timestamp_part(char *string) +{ + char *ket = strrchr(string, '>'); + if (!ket || ket[1] != ' ') + die(_("Malformed ident string: '%s'"), string); + *++ket = '\0'; + return ket; +} + +static int prepare_to_commit(const char *index_file, const char *prefix, + struct commit *current_head, + struct wt_status *s, + struct strbuf *author_ident) +{ + struct stat statbuf; + struct strbuf committer_ident = STRBUF_INIT; + int commitable, saved_color_setting; + struct strbuf sb = STRBUF_INIT; + char *buffer; + const char *hook_arg1 = NULL; + const char *hook_arg2 = NULL; + int ident_shown = 0; + int clean_message_contents = (cleanup_mode != CLEANUP_NONE); + + /* This checks and barfs if author is badly specified */ + determine_author_info(author_ident); + + if (!no_verify && run_hook(index_file, "pre-commit", NULL)) + return 0; + + if (squash_message) { + /* + * Insert the proper subject line before other commit + * message options add their content. + */ + if (use_message && !strcmp(use_message, squash_message)) + strbuf_addstr(&sb, "squash! "); + else { + struct pretty_print_context ctx = {0}; + struct commit *c; + c = lookup_commit_reference_by_name(squash_message); + if (!c) + die(_("could not lookup commit %s"), squash_message); + ctx.output_encoding = get_commit_output_encoding(); + format_commit_message(c, "squash! %s\n\n", &sb, + &ctx); + } + } + + if (message.len) { + strbuf_addbuf(&sb, &message); + hook_arg1 = "message"; + } else if (logfile && !strcmp(logfile, "-")) { + if (isatty(0)) + fprintf(stderr, _("(reading log message from standard input)\n")); + if (strbuf_read(&sb, 0, 0) < 0) + die_errno(_("could not read log from standard input")); + hook_arg1 = "message"; + } else if (logfile) { + if (strbuf_read_file(&sb, logfile, 0) < 0) + die_errno(_("could not read log file '%s'"), + logfile); + hook_arg1 = "message"; + } else if (use_message) { + buffer = strstr(use_message_buffer, "\n\n"); + if (!use_editor && (!buffer || buffer[2] == '\0')) + die(_("commit has empty message")); + strbuf_add(&sb, buffer + 2, strlen(buffer + 2)); + hook_arg1 = "commit"; + hook_arg2 = use_message; + } else if (fixup_message) { + struct pretty_print_context ctx = {0}; + struct commit *commit; + commit = lookup_commit_reference_by_name(fixup_message); + if (!commit) + die(_("could not lookup commit %s"), fixup_message); + ctx.output_encoding = get_commit_output_encoding(); + format_commit_message(commit, "fixup! %s\n\n", + &sb, &ctx); + hook_arg1 = "message"; + } else if (!stat(git_path("MERGE_MSG"), &statbuf)) { + if (strbuf_read_file(&sb, git_path("MERGE_MSG"), 0) < 0) + 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_errno(_("could not read SQUASH_MSG")); + hook_arg1 = "squash"; + } else if (template_file) { + if (strbuf_read_file(&sb, template_file, 0) < 0) + die_errno(_("could not read '%s'"), template_file); + hook_arg1 = "template"; + clean_message_contents = 0; + } + + /* + * The remaining cases don't modify the template message, but + * just set the argument(s) to the prepare-commit-msg hook. + */ + 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) { + /* + * If squash_commit was used for the commit subject, + * then we're possibly hijacking other commit log options. + * Reset the hook args to tell the real story. + */ + hook_arg1 = "message"; + hook_arg2 = ""; + } + + s->fp = fopen(git_path(commit_editmsg), "w"); + if (s->fp == NULL) + die_errno(_("could not open '%s'"), git_path(commit_editmsg)); + + if (clean_message_contents) + stripspace(&sb, 0); + + if (signoff) { + /* + * See if we have a Conflicts: block at the end. If yes, count + * its size, so we can ignore it. + */ + int ignore_footer = 0; + int i, eol, previous = 0; + const char *nl; + + for (i = 0; i < sb.len; i++) { + nl = memchr(sb.buf + i, '\n', sb.len - i); + if (nl) + eol = nl - sb.buf; + else + eol = sb.len; + if (!prefixcmp(sb.buf + previous, "\nConflicts:\n")) { + ignore_footer = sb.len - previous; + break; + } + while (i < eol) + i++; + previous = eol; + } + + append_signoff(&sb, ignore_footer, 0); + } + + if (fwrite(sb.buf, 1, sb.len, s->fp) < sb.len) + die_errno(_("could not write commit template")); + + strbuf_release(&sb); + + /* This checks if committer ident is explicitly given */ + strbuf_addstr(&committer_ident, git_committer_info(IDENT_STRICT)); + if (use_editor && include_status) { + char *ai_tmp, *ci_tmp; + if (whence != FROM_COMMIT) + status_printf_ln(s, GIT_COLOR_NORMAL, + whence == FROM_MERGE + ? _("\n" + "It looks like you may be committing a merge.\n" + "If this is not correct, please remove the file\n" + " %s\n" + "and try again.\n") + : _("\n" + "It looks like you may be committing a cherry-pick.\n" + "If this is not correct, please remove the file\n" + " %s\n" + "and try again.\n"), + git_path(whence == FROM_MERGE + ? "MERGE_HEAD" + : "CHERRY_PICK_HEAD")); + + fprintf(s->fp, "\n"); + if (cleanup_mode == CLEANUP_ALL) + status_printf(s, GIT_COLOR_NORMAL, + _("Please enter the commit message for your changes." + " Lines starting\nwith '%c' will be ignored, and an empty" + " message aborts the commit.\n"), comment_line_char); + else /* CLEANUP_SPACE, that is. */ + status_printf(s, GIT_COLOR_NORMAL, + _("Please enter the commit message for your changes." + " Lines starting\n" + "with '%c' will be kept; you may remove them" + " yourself if you want to.\n" + "An empty message aborts the commit.\n"), comment_line_char); + if (only_include_assumed) + status_printf_ln(s, GIT_COLOR_NORMAL, + "%s", only_include_assumed); + + ai_tmp = cut_ident_timestamp_part(author_ident->buf); + 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"), + ident_shown++ ? "" : "\n", + author_ident->buf); + + if (!committer_ident_sufficiently_given()) + status_printf_ln(s, GIT_COLOR_NORMAL, + _("%s" + "Committer: %s"), + ident_shown++ ? "" : "\n", + committer_ident.buf); + + if (ident_shown) + status_printf_ln(s, GIT_COLOR_NORMAL, ""); + + saved_color_setting = s->use_color; + s->use_color = 0; + commitable = run_status(s->fp, index_file, prefix, 1, s); + s->use_color = saved_color_setting; + + *ai_tmp = ' '; + *ci_tmp = ' '; + } else { + unsigned char sha1[20]; + const char *parent = "HEAD"; + + if (!active_nr && read_cache() < 0) + die(_("Cannot read index")); + + if (amend) + parent = "HEAD^1"; + + if (get_sha1(parent, sha1)) + commitable = !!active_nr; + else + commitable = index_differs_from(parent, 0); + } + strbuf_release(&committer_ident); + + fclose(s->fp); + + /* + * 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(current_head))) { + run_status(stdout, index_file, prefix, 0, s); + if (amend) + fputs(_(empty_amend_advice), stderr); + else if (whence == FROM_CHERRY_PICK) { + fputs(_(empty_cherry_pick_advice), stderr); + if (!sequencer_in_use) + fputs(_(empty_cherry_pick_advice_single), stderr); + else + fputs(_(empty_cherry_pick_advice_multi), stderr); + } + return 0; + } + + /* + * Re-read the index as pre-commit hook could have updated it, + * and write it out as a tree. We must do this before we invoke + * the editor and after we invoke run_status above. + */ + discard_cache(); + read_cache_from(index_file); + if (update_main_cache_tree(0)) { + error(_("Error building trees")); + return 0; + } + + if (run_hook(index_file, "prepare-commit-msg", + git_path(commit_editmsg), hook_arg1, hook_arg2, NULL)) + return 0; + + if (use_editor) { + char index[PATH_MAX]; + const char *env[2] = { NULL }; + env[0] = index; + snprintf(index, sizeof(index), "GIT_INDEX_FILE=%s", index_file); + if (launch_editor(git_path(commit_editmsg), NULL, env)) { + fprintf(stderr, + _("Please supply the message using either -m or -F option.\n")); + exit(1); + } + } + + if (!no_verify && + run_hook(index_file, "commit-msg", git_path(commit_editmsg), NULL)) { + return 0; + } + + return 1; +} + +static int rest_is_empty(struct strbuf *sb, int start) +{ + int i, eol; + const char *nl; + + /* Check if the rest is just whitespace and Signed-of-by's. */ + for (i = start; i < sb->len; i++) { + nl = memchr(sb->buf + i, '\n', sb->len - i); + if (nl) + eol = nl - sb->buf; + else + eol = sb->len; + + if (strlen(sign_off_header) <= eol - i && + !prefixcmp(sb->buf + i, sign_off_header)) { + i = eol; + continue; + } + while (i < eol) + if (!isspace(sb->buf[i++])) + return 0; + } + + return 1; +} + +/* + * Find out if the message in the strbuf contains only whitespace and + * Signed-off-by lines. + */ +static int message_is_empty(struct strbuf *sb) +{ + if (cleanup_mode == CLEANUP_NONE && sb->len) + return 0; + return rest_is_empty(sb, 0); +} + +/* + * See if the user edited the message in the editor or left what + * was in the template intact + */ +static int template_untouched(struct strbuf *sb) +{ + struct strbuf tmpl = STRBUF_INIT; + char *start; + + if (cleanup_mode == CLEANUP_NONE && sb->len) + return 0; + + if (!template_file || strbuf_read_file(&tmpl, template_file, 0) <= 0) + return 0; + + stripspace(&tmpl, cleanup_mode == CLEANUP_ALL); + start = (char *)skip_prefix(sb->buf, tmpl.buf); + if (!start) + start = sb->buf; + strbuf_release(&tmpl); + return rest_is_empty(sb, start - sb->buf); +} + +static const char *find_author_by_nickname(const char *name) +{ + struct rev_info revs; + struct commit *commit; + struct strbuf buf = STRBUF_INIT; + struct string_list mailmap = STRING_LIST_INIT_NODUP; + const char *av[20]; + int ac = 0; + + init_revisions(&revs, NULL); + strbuf_addf(&buf, "--author=%s", name); + av[++ac] = "--all"; + av[++ac] = "-i"; + av[++ac] = buf.buf; + av[++ac] = NULL; + setup_revisions(ac, av, &revs, NULL); + revs.mailmap = &mailmap; + read_mailmap(revs.mailmap, NULL); + + 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, &ctx); + clear_mailmap(&mailmap); + 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 const char *read_commit_message(const char *name) +{ + const char *out_enc; + 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(); + return logmsg_reencode(commit, NULL, out_enc); +} + +/* + * Enumerate what needs to be propagated when --porcelain + * is not in effect here. + */ +static struct status_deferred_config { + enum status_format status_format; + int show_branch; +} status_deferred_config = { + STATUS_FORMAT_UNSPECIFIED, + -1 /* unspecified */ +}; + +static void finalize_deferred_config(struct wt_status *s) +{ + int use_deferred_config = (status_format != STATUS_FORMAT_PORCELAIN && + !s->null_termination); + + if (s->null_termination) { + if (status_format == STATUS_FORMAT_NONE || + status_format == STATUS_FORMAT_UNSPECIFIED) + status_format = STATUS_FORMAT_PORCELAIN; + else if (status_format == STATUS_FORMAT_LONG) + die(_("--long and -z are incompatible")); + } + + if (use_deferred_config && status_format == STATUS_FORMAT_UNSPECIFIED) + status_format = status_deferred_config.status_format; + if (status_format == STATUS_FORMAT_UNSPECIFIED) + status_format = STATUS_FORMAT_NONE; + + if (use_deferred_config && s->show_branch < 0) + s->show_branch = status_deferred_config.show_branch; + if (s->show_branch < 0) + s->show_branch = 0; +} + +static int parse_and_validate_options(int argc, const char *argv[], + const struct option *options, + const char * const usage[], + const char *prefix, + struct commit *current_head, + struct wt_status *s) +{ + int f = 0; + + argc = parse_options(argc, argv, prefix, options, usage, 0); + finalize_deferred_config(s); + + 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 || have_option_m || use_message || fixup_message) + use_editor = 0; + if (0 <= edit_flag) + use_editor = edit_flag; + if (!use_editor) + setenv("GIT_EDITOR", ":", 1); + + /* Sanity check options */ + if (amend && !current_head) + die(_("You have nothing to amend.")); + if (amend && whence != FROM_COMMIT) { + if (whence == FROM_MERGE) + die(_("You are in the middle of a merge -- cannot amend.")); + else if (whence == FROM_CHERRY_PICK) + die(_("You are in the middle of a cherry-pick -- cannot amend.")); + } + if (fixup_message && squash_message) + die(_("Options --squash and --fixup cannot be used together")); + if (use_message) + f++; + if (edit_message) + f++; + if (fixup_message) + f++; + if (logfile) + f++; + if (f > 1) + die(_("Only one of -c/-C/-F/--fixup can be used.")); + if (message.len && f > 0) + die((_("Option -m cannot be combined with -c/-C/-F/--fixup."))); + if (f || message.len) + template_file = NULL; + if (edit_message) + use_message = edit_message; + if (amend && !use_message && !fixup_message) + use_message = "HEAD"; + if (!use_message && whence != FROM_CHERRY_PICK && renew_authorship) + die(_("--reset-author can be used only with -C, -c or --amend.")); + if (use_message) { + 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 (patch_interactive) + interactive = 1; + + if (!!also + !!only + !!all + !!interactive > 1) + 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) + only_include_assumed = _("Clever... amending the last one with dirty index."); + if (argc > 0 && !also && !only) + only_include_assumed = _("Explicit paths specified without -i nor -o; assuming --only paths..."); + if (!cleanup_arg || !strcmp(cleanup_arg, "default")) + cleanup_mode = use_editor ? CLEANUP_ALL : CLEANUP_SPACE; + else if (!strcmp(cleanup_arg, "verbatim")) + cleanup_mode = CLEANUP_NONE; + else if (!strcmp(cleanup_arg, "whitespace")) + cleanup_mode = CLEANUP_SPACE; + else if (!strcmp(cleanup_arg, "strip")) + cleanup_mode = CLEANUP_ALL; + else + die(_("Invalid cleanup mode %s"), cleanup_arg); + + handle_untracked_files_arg(s); + + if (all && argc > 0) + die(_("Paths with -a does not make sense.")); + + if (status_format != STATUS_FORMAT_NONE) + dry_run = 1; + + return argc; +} + +static int dry_run_commit(int argc, const char **argv, const char *prefix, + const struct commit *current_head, struct wt_status *s) +{ + int commitable; + const char *index_file; + + index_file = prepare_index(argc, argv, prefix, current_head, 1); + commitable = run_status(stdout, index_file, prefix, 0, s); + rollback_index_files(); + + return commitable ? 0 : 1; +} + +static int parse_status_slot(const char *var, int offset) +{ + if (!strcasecmp(var+offset, "header")) + return WT_STATUS_HEADER; + if (!strcasecmp(var+offset, "branch")) + return WT_STATUS_ONBRANCH; + 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; +} + +static int git_status_config(const char *k, const char *v, void *cb) +{ + struct wt_status *s = cb; + + if (!prefixcmp(k, "column.")) + return git_column_config(k, v, "status", &s->colopts); + 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.short")) { + if (git_config_bool(k, v)) + status_deferred_config.status_format = STATUS_FORMAT_SHORT; + else + status_deferred_config.status_format = STATUS_FORMAT_NONE; + return 0; + } + if (!strcmp(k, "status.branch")) { + status_deferred_config.show_branch = git_config_bool(k, v); + return 0; + } + if (!strcmp(k, "status.color") || !strcmp(k, "color.status")) { + s->use_color = git_config_colorbool(k, v); + 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); +} + +int cmd_status(int argc, const char **argv, const char *prefix) +{ + static struct wt_status s; + int fd; + unsigned char sha1[20]; + static struct option builtin_status_options[] = { + OPT__VERBOSE(&verbose, N_("be verbose")), + OPT_SET_INT('s', "short", &status_format, + N_("show status concisely"), STATUS_FORMAT_SHORT), + OPT_BOOL('b', "branch", &s.show_branch, + N_("show branch information")), + OPT_SET_INT(0, "porcelain", &status_format, + N_("machine-readable output"), + STATUS_FORMAT_PORCELAIN), + OPT_SET_INT(0, "long", &status_format, + N_("show status in long format (default)"), + STATUS_FORMAT_LONG), + OPT_BOOLEAN('z', "null", &s.null_termination, + N_("terminate entries with NUL")), + { OPTION_STRING, 'u', "untracked-files", &untracked_files_arg, + N_("mode"), + N_("show untracked files, optional modes: all, normal, no. (Default: all)"), + PARSE_OPT_OPTARG, NULL, (intptr_t)"all" }, + OPT_BOOLEAN(0, "ignored", &show_ignored_in_status, + N_("show ignored files")), + { OPTION_STRING, 0, "ignore-submodules", &ignore_submodule_arg, N_("when"), + N_("ignore changes to submodules, optional when: all, dirty, untracked. (Default: all)"), + PARSE_OPT_OPTARG, NULL, (intptr_t)"all" }, + OPT_COLUMN(0, "column", &s.colopts, N_("list untracked files in columns")), + OPT_END(), + }; + + if (argc == 2 && !strcmp(argv[1], "-h")) + usage_with_options(builtin_status_usage, builtin_status_options); + + wt_status_prepare(&s); + gitmodules_config(); + git_config(git_status_config, &s); + determine_whence(&s); + argc = parse_options(argc, argv, prefix, + builtin_status_options, + builtin_status_usage, 0); + finalize_colopts(&s.colopts, -1); + finalize_deferred_config(&s); + + handle_untracked_files_arg(&s); + if (show_ignored_in_status) + s.show_ignored_files = 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); + + fd = hold_locked_index(&index_lock, 0); + if (0 <= fd) + update_index_if_able(&the_index, &index_lock); + + s.is_initial = get_sha1(s.reference, sha1) ? 1 : 0; + s.ignore_submodule_arg = ignore_submodule_arg; + wt_status_collect(&s); + + if (s.relative_paths) + s.prefix = prefix; + + switch (status_format) { + case STATUS_FORMAT_SHORT: + wt_shortstatus_print(&s); + break; + case STATUS_FORMAT_PORCELAIN: + wt_porcelain_print(&s); + break; + case STATUS_FORMAT_UNSPECIFIED: + die("BUG: finalize_deferred_config() should have been called"); + break; + case STATUS_FORMAT_NONE: + case STATUS_FORMAT_LONG: + s.verbose = verbose; + s.ignore_submodule_arg = ignore_submodule_arg; + wt_status_print(&s); + break; + } + return 0; +} + +static void print_summary(const char *prefix, const unsigned char *sha1, + int initial_commit) +{ + struct rev_info rev; + struct commit *commit; + struct strbuf format = STRBUF_INIT; + unsigned char junk_sha1[20]; + const char *head; + struct pretty_print_context pctx = {0}; + struct strbuf author_ident = STRBUF_INIT; + struct strbuf committer_ident = STRBUF_INIT; + + commit = lookup_commit(sha1); + if (!commit) + die(_("couldn't look up newly created commit")); + 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 (!committer_ident_sufficiently_given()) { + strbuf_addstr(&format, "\n Committer: "); + strbuf_addbuf_percentquote(&format, &committer_ident); + if (advice_implicit_identity) { + strbuf_addch(&format, '\n'); + strbuf_addstr(&format, _(implicit_ident_advice)); + } + } + strbuf_release(&author_ident); + strbuf_release(&committer_ident); + + init_revisions(&rev, prefix); + setup_revisions(0, NULL, &rev, NULL); + + rev.diff = 1; + rev.diffopt.output_format = + DIFF_FORMAT_SHORTSTAT | DIFF_FORMAT_SUMMARY; + + rev.verbose_header = 1; + rev.show_root_diff = 1; + get_commit_format(format.buf, &rev); + rev.always_show_header = 0; + rev.diffopt.detect_rename = 1; + rev.diffopt.break_opt = 0; + diff_setup_done(&rev.diffopt); + + head = resolve_ref_unsafe("HEAD", junk_sha1, 0, NULL); + printf("[%s%s ", + !prefixcmp(head, "refs/heads/") ? + head + 11 : + !strcmp(head, "HEAD") ? + _("detached HEAD") : + head, + initial_commit ? _(" (root-commit)") : ""); + + if (!log_tree_commit(&rev, commit)) { + rev.always_show_header = 1; + rev.use_terminator = 1; + log_tree_commit(&rev, commit); + } + + strbuf_release(&format); +} + +static int git_commit_config(const char *k, const char *v, void *cb) +{ + struct wt_status *s = cb; + int status; + + if (!strcmp(k, "commit.template")) + return git_config_pathname(&template_file, k, v); + if (!strcmp(k, "commit.status")) { + include_status = git_config_bool(k, v); + return 0; + } + if (!strcmp(k, "commit.cleanup")) + return git_config_string(&cleanup_arg, k, v); + + status = git_gpg_config(k, v, NULL); + if (status) + return status; + return git_status_config(k, v, s); +} + +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; + + argv[0] = find_hook("post-rewrite"); + if (!argv[0]) + return 0; + + 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) +{ + static struct wt_status s; + static struct option builtin_commit_options[] = { + OPT__QUIET(&quiet, N_("suppress summary after successful commit")), + OPT__VERBOSE(&verbose, N_("show diff in commit message template")), + + OPT_GROUP(N_("Commit message options")), + OPT_FILENAME('F', "file", &logfile, N_("read message from file")), + OPT_STRING(0, "author", &force_author, N_("author"), N_("override author for commit")), + OPT_STRING(0, "date", &force_date, N_("date"), N_("override date for commit")), + OPT_CALLBACK('m', "message", &message, N_("message"), N_("commit message"), opt_parse_m), + OPT_STRING('c', "reedit-message", &edit_message, N_("commit"), N_("reuse and edit message from specified commit")), + OPT_STRING('C', "reuse-message", &use_message, N_("commit"), N_("reuse message from specified commit")), + OPT_STRING(0, "fixup", &fixup_message, N_("commit"), N_("use autosquash formatted message to fixup specified commit")), + OPT_STRING(0, "squash", &squash_message, N_("commit"), N_("use autosquash formatted message to squash specified commit")), + OPT_BOOLEAN(0, "reset-author", &renew_authorship, N_("the commit is authored by me now (used with -C/-c/--amend)")), + OPT_BOOLEAN('s', "signoff", &signoff, N_("add Signed-off-by:")), + OPT_FILENAME('t', "template", &template_file, N_("use specified template file")), + OPT_BOOL('e', "edit", &edit_flag, N_("force edit of commit")), + OPT_STRING(0, "cleanup", &cleanup_arg, N_("default"), N_("how to strip spaces and #comments from message")), + OPT_BOOLEAN(0, "status", &include_status, N_("include status in commit message template")), + { OPTION_STRING, 'S', "gpg-sign", &sign_commit, N_("key id"), + N_("GPG sign commit"), PARSE_OPT_OPTARG, NULL, (intptr_t) "" }, + /* end commit message options */ + + OPT_GROUP(N_("Commit contents options")), + OPT_BOOLEAN('a', "all", &all, N_("commit all changed files")), + OPT_BOOLEAN('i', "include", &also, N_("add specified files to index for commit")), + OPT_BOOLEAN(0, "interactive", &interactive, N_("interactively add files")), + OPT_BOOLEAN('p', "patch", &patch_interactive, N_("interactively add changes")), + OPT_BOOLEAN('o', "only", &only, N_("commit only specified files")), + OPT_BOOLEAN('n', "no-verify", &no_verify, N_("bypass pre-commit hook")), + OPT_BOOLEAN(0, "dry-run", &dry_run, N_("show what would be committed")), + OPT_SET_INT(0, "short", &status_format, N_("show status concisely"), + STATUS_FORMAT_SHORT), + OPT_BOOL(0, "branch", &s.show_branch, N_("show branch information")), + OPT_SET_INT(0, "porcelain", &status_format, + N_("machine-readable output"), STATUS_FORMAT_PORCELAIN), + OPT_SET_INT(0, "long", &status_format, + N_("show status in long format (default)"), + STATUS_FORMAT_LONG), + OPT_BOOLEAN('z', "null", &s.null_termination, + N_("terminate entries with NUL")), + OPT_BOOLEAN(0, "amend", &amend, N_("amend previous commit")), + OPT_BOOLEAN(0, "no-post-rewrite", &no_post_rewrite, N_("bypass post-rewrite hook")), + { OPTION_STRING, 'u', "untracked-files", &untracked_files_arg, N_("mode"), N_("show untracked files, optional modes: all, normal, no. (Default: all)"), PARSE_OPT_OPTARG, NULL, (intptr_t)"all" }, + /* end commit contents options */ + + { OPTION_BOOLEAN, 0, "allow-empty", &allow_empty, NULL, + N_("ok to record an empty change"), + PARSE_OPT_NOARG | PARSE_OPT_HIDDEN }, + { OPTION_BOOLEAN, 0, "allow-empty-message", &allow_empty_message, NULL, + N_("ok to record a change with an empty message"), + PARSE_OPT_NOARG | PARSE_OPT_HIDDEN }, + + OPT_END() + }; + + struct strbuf sb = STRBUF_INIT; + struct strbuf author_ident = STRBUF_INIT; + const char *index_file, *reflog_msg; + char *nl, *p; + 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 commit *current_head = NULL; + struct commit_extra_header *extra = NULL; + + if (argc == 2 && !strcmp(argv[1], "-h")) + usage_with_options(builtin_commit_usage, builtin_commit_options); + + wt_status_prepare(&s); + gitmodules_config(); + git_config(git_commit_config, &s); + status_format = STATUS_FORMAT_NONE; /* Ignore status.short */ + determine_whence(&s); + s.colopts = 0; + + 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")); + } + argc = parse_and_validate_options(argc, argv, builtin_commit_options, + 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, + current_head, &s, &author_ident)) { + rollback_index_files(); + return 1; + } + + /* Determine parents */ + reflog_msg = getenv("GIT_REFLOG_ACTION"); + if (!current_head) { + if (!reflog_msg) + reflog_msg = "commit (initial)"; + } else if (amend) { + struct commit_list *c; + + if (!reflog_msg) + reflog_msg = "commit (amend)"; + 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; + FILE *fp; + + if (!reflog_msg) + reflog_msg = "commit (merge)"; + 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"), + git_path("MERGE_HEAD")); + while (strbuf_getline(&m, fp, '\n') != EOF) { + struct commit *parent; + + parent = get_merge_parent(m.buf); + if (!parent) + die(_("Corrupt MERGE_HEAD file (%s)"), m.buf); + pptr = &commit_list_insert(parent, pptr)->next; + } + fclose(fp); + strbuf_release(&m); + if (!stat(git_path("MERGE_MODE"), &statbuf)) { + if (strbuf_read_file(&sb, git_path("MERGE_MODE"), 0) < 0) + die_errno(_("could not read MERGE_MODE")); + if (!strcmp(sb.buf, "no-ff")) + allow_fast_forward = 0; + } + if (allow_fast_forward) + parents = reduce_heads(parents); + } else { + if (!reflog_msg) + reflog_msg = (whence == FROM_CHERRY_PICK) + ? "commit (cherry-pick)" + : "commit"; + pptr = &commit_list_insert(current_head, pptr)->next; + } + + /* 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: %s"), strerror(saved_errno)); + } + + /* Truncate the message just before the diff, if any. */ + if (verbose) { + p = strstr(sb.buf, "\ndiff --git "); + if (p != NULL) + strbuf_setlen(&sb, p - sb.buf + 1); + } + + if (cleanup_mode != CLEANUP_NONE) + stripspace(&sb, cleanup_mode == CLEANUP_ALL); + if (template_untouched(&sb) && !allow_empty_message) { + rollback_index_files(); + fprintf(stderr, _("Aborting commit; you did not edit the message.\n")); + exit(1); + } + if (message_is_empty(&sb) && !allow_empty_message) { + rollback_index_files(); + fprintf(stderr, _("Aborting commit due to empty commit message.\n")); + exit(1); + } + + if (amend) { + const char *exclude_gpgsig[2] = { "gpgsig", NULL }; + extra = read_commit_extra_headers(current_head, exclude_gpgsig); + } else { + struct commit_extra_header **tail = &extra; + append_merge_tag_headers(parents, &tail); + } + + if (commit_tree_extended(&sb, active_cache_tree->sha1, parents, sha1, + author_ident.buf, sign_commit, extra)) { + rollback_index_files(); + die(_("failed to write commit object")); + } + strbuf_release(&author_ident); + free_commit_extra_headers(extra); + + ref_lock = lock_any_ref_for_update("HEAD", + !current_head + ? NULL + : current_head->object.sha1, + 0); + + nl = strchr(sb.buf, '\n'); + if (nl) + strbuf_setlen(&sb, nl + 1 - sb.buf); + else + strbuf_addch(&sb, '\n'); + strbuf_insert(&sb, 0, reflog_msg, strlen(reflog_msg)); + strbuf_insert(&sb, strlen(reflog_msg), ": ", 2); + + if (!ref_lock) { + rollback_index_files(); + die(_("cannot lock HEAD ref")); + } + 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")); + unlink(git_path("SQUASH_MSG")); + + if (commit_index_files()) + die (_("Repository has been updated, but unable to write\n" + "new_index file. Check that disk is not full or quota is\n" + "not exceeded, and then \"git reset HEAD\" to recover.")); + + rerere(0); + run_hook(get_index_file(), "post-commit", NULL); + if (amend && !no_post_rewrite) { + struct notes_rewrite_cfg *cfg; + cfg = init_copy_notes_for_rewrite("amend"); + if (cfg) { + /* we are amending, so current_head is not NULL */ + copy_note_for_rewrite(cfg, current_head->object.sha1, sha1); + finish_copy_notes_for_rewrite(cfg, "Notes added by 'git commit --amend'"); + } + run_rewrite_hook(current_head->object.sha1, sha1); + } + if (!quiet) + print_summary(prefix, sha1, !current_head); + + return 0; +} |