diff options
Diffstat (limited to 'builtin/commit.c')
| -rw-r--r-- | builtin/commit.c | 1405 |
1 files changed, 1405 insertions, 0 deletions
diff --git a/builtin/commit.c b/builtin/commit.c new file mode 100644 index 0000000000..c4a577d5c5 --- /dev/null +++ b/builtin/commit.c @@ -0,0 +1,1405 @@ +/* + * 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" + +static const char * const builtin_commit_usage[] = { + "git commit [options] [--] <filepattern>...", + NULL +}; + +static const char * const builtin_status_usage[] = { + "git status [options] [--] <filepattern>...", + NULL +}; + +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 const char empty_amend_advice[] = +"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 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 */ +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; +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, renew_authorship; +static int no_post_rewrite, allow_empty_message; +static char *untracked_files_arg, *force_date, *ignore_submodule_arg; +/* + * 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 char *cleanup_arg; + +static int use_editor = 1, initial_commit, in_merge, include_status = 1; +static int show_ignored_in_status; +static const char *only_include_assumed; +static struct strbuf message; + +static int null_termination; +static enum { + STATUS_FORMAT_LONG, + STATUS_FORMAT_SHORT, + STATUS_FORMAT_PORCELAIN +} status_format = STATUS_FORMAT_LONG; +static int status_show_branch; + +static int opt_parse_m(const struct option *opt, const char *arg, int unset) +{ + struct strbuf *buf = opt->value; + if (unset) + strbuf_setlen(buf, 0); + else { + strbuf_addstr(buf, arg); + strbuf_addstr(buf, "\n\n"); + } + return 0; +} + +static struct option builtin_commit_options[] = { + OPT__QUIET(&quiet), + OPT__VERBOSE(&verbose), + + 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', "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"), + OPT_BOOLEAN('i', "include", &also, "add specified files to index for commit"), + OPT_BOOLEAN(0, "interactive", &interactive, "interactively add files"), + OPT_BOOLEAN('o', "only", &only, "commit only specified files"), + OPT_BOOLEAN('n', "no-verify", &no_verify, "bypass pre-commit hook"), + OPT_BOOLEAN(0, "dry-run", &dry_run, "show what would be committed"), + OPT_SET_INT(0, "short", &status_format, "show status concisely", + STATUS_FORMAT_SHORT), + OPT_BOOLEAN(0, "branch", &status_show_branch, "show branch information"), + OPT_SET_INT(0, "porcelain", &status_format, + "show porcelain output format", STATUS_FORMAT_PORCELAIN), + OPT_BOOLEAN('z', "null", &null_termination, + "terminate entries with NUL"), + OPT_BOOLEAN(0, "amend", &amend, "amend previous commit"), + 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" }, + /* end commit contents options */ + + { OPTION_BOOLEAN, 0, "allow-empty", &allow_empty, NULL, + "ok to record an empty change", + PARSE_OPT_NOARG | PARSE_OPT_HIDDEN }, + { OPTION_BOOLEAN, 0, "allow-empty-message", &allow_empty_message, NULL, + "ok to record a change with an empty message", + PARSE_OPT_NOARG | PARSE_OPT_HIDDEN }, + + OPT_END() +}; + +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; + + for (i = 0; pattern[i]; i++) + ; + m = xcalloc(1, i); + + if (with_tree) + overlay_tree_on_cache(with_tree, prefix); + + 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; + 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 ? strlen(prefix) : 0); +} + +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(void) +{ + struct tree *tree; + struct unpack_trees_options opts; + struct tree_desc t; + + if (initial_commit) { + 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(head_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, int is_status) +{ + int fd; + struct string_list partial; + const char **pathspec = NULL; + int refresh_flags = REFRESH_QUIET; + + if (is_status) + refresh_flags |= REFRESH_UNMERGED; + if (interactive) { + if (interactive_add(argc, argv, prefix) != 0) + die("interactive add failed"); + 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); + + if (read_cache_preload(pathspec) < 0) + die("index file corrupt"); + + /* + * 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); + 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 (!pathspec || !*pathspec) { + fd = hold_locked_index(&index_lock, 1); + refresh_cache_or_die(refresh_flags); + if (active_cache_changed) { + 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 (in_merge) + die("cannot do a partial commit during a merge."); + + memset(&partial, 0, sizeof(partial)); + partial.strdup_strings = 1; + if (list_paths(&partial, initial_commit ? 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(); + 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, null_termination, status_show_branch); + break; + case STATUS_FORMAT_PORCELAIN: + wt_porcelain_print(s, null_termination); + break; + case STATUS_FORMAT_LONG: + wt_status_print(s); + break; + } + + return s->commitable; +} + +static int is_a_merge(const unsigned char *sha1) +{ + struct commit *commit = lookup_commit(sha1); + if (!commit || parse_commit(commit)) + die("could not parse HEAD commit"); + return !!(commit->parents && commit->parents->next); +} + +static const char sign_off_header[] = "Signed-off-by: "; + +static void determine_author_info(void) +{ + char *name, *email, *date; + + name = getenv("GIT_AUTHOR_NAME"); + email = getenv("GIT_AUTHOR_EMAIL"); + date = getenv("GIT_AUTHOR_DATE"); + + if (use_message && !renew_authorship) { + const char *a, *lb, *rb, *eol; + + a = strstr(use_message_buffer, "\nauthor "); + if (!a) + die("invalid commit: %s", use_message); + + lb = strchrnul(a + strlen("\nauthor "), '<'); + rb = strchrnul(lb, '>'); + eol = strchrnul(rb, '\n'); + if (!*lb || !*rb || !*eol) + die("invalid commit: %s", use_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("<"))); + date = xmemdupz(rb + strlen("> "), eol - (rb + strlen("> "))); + } + + 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; + + 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) +{ + struct stat statbuf; + int commitable, saved_color_setting; + struct strbuf sb = STRBUF_INIT; + char *buffer; + FILE *fp; + const char *hook_arg1 = NULL; + const char *hook_arg2 = NULL; + int ident_shown = 0; + + if (!no_verify && run_hook(index_file, "pre-commit", NULL)) + return 0; + + 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 (!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 (!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 && !stat(template_file, &statbuf)) { + 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. + */ + else if (in_merge) + hook_arg1 = "merge"; + + fp = fopen(git_path(commit_editmsg), "w"); + if (fp == NULL) + die_errno("could not open '%s'", git_path(commit_editmsg)); + + if (cleanup_mode != CLEANUP_NONE) + stripspace(&sb, 0); + + if (signoff) { + struct strbuf sob = STRBUF_INIT; + int i; + + strbuf_addstr(&sob, sign_off_header); + strbuf_addstr(&sob, fmt_name(getenv("GIT_COMMITTER_NAME"), + getenv("GIT_COMMITTER_EMAIL"))); + strbuf_addch(&sob, '\n'); + for (i = sb.len - 1; i > 0 && sb.buf[i - 1] != '\n'; i--) + ; /* do nothing */ + if (prefixcmp(sb.buf + i, sob.buf)) { + if (!i || !ends_rfc2822_footer(&sb)) + strbuf_addch(&sb, '\n'); + strbuf_addbuf(&sb, &sob); + } + strbuf_release(&sob); + } + + if (fwrite(sb.buf, 1, sb.len, fp) < sb.len) + die_errno("could not write commit template"); + + strbuf_release(&sb); + + determine_author_info(); + + /* This checks if committer ident is explicitly given */ + git_committer_info(0); + if (use_editor && include_status) { + char *author_ident; + const char *committer_ident; + + if (in_merge) + fprintf(fp, + "#\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", + git_path("MERGE_HEAD")); + + fprintf(fp, + "\n" + "# Please enter the commit message for your changes."); + if (cleanup_mode == CLEANUP_ALL) + fprintf(fp, + " Lines starting\n" + "# with '#' will be ignored, and an empty" + " message aborts the commit.\n"); + else /* CLEANUP_SPACE, that is. */ + fprintf(fp, + " Lines starting\n" + "# with '#' will be kept; you may remove them" + " yourself if you want to.\n" + "# An empty message aborts the commit.\n"); + if (only_include_assumed) + fprintf(fp, "# %s\n", only_include_assumed); + + author_ident = xstrdup(fmt_name(author_name, author_email)); + committer_ident = fmt_name(getenv("GIT_COMMITTER_NAME"), + getenv("GIT_COMMITTER_EMAIL")); + if (strcmp(author_ident, committer_ident)) + fprintf(fp, + "%s" + "# Author: %s\n", + ident_shown++ ? "" : "#\n", + author_ident); + free(author_ident); + + if (!user_ident_sufficiently_given()) + fprintf(fp, + "%s" + "# Committer: %s\n", + ident_shown++ ? "" : "#\n", + committer_ident); + + if (ident_shown) + fprintf(fp, "#\n"); + + saved_color_setting = s->use_color; + s->use_color = 0; + commitable = run_status(fp, index_file, prefix, 1, s); + s->use_color = saved_color_setting; + } else { + unsigned char sha1[20]; + const char *parent = "HEAD"; + + 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); + } + + fclose(fp); + + if (!commitable && !in_merge && !allow_empty && + !(amend && is_a_merge(head_sha1))) { + run_status(stdout, index_file, prefix, 0, s); + if (amend) + fputs(empty_amend_advice, 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 (!active_cache_tree) + active_cache_tree = cache_tree(); + if (cache_tree_update(active_cache_tree, + active_cache, active_nr, 0, 0) < 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; +} + +/* + * Find out if the message in the strbuf contains only whitespace and + * Signed-off-by lines. + */ +static int message_is_empty(struct strbuf *sb) +{ + struct strbuf tmpl = STRBUF_INIT; + const char *nl; + int eol, i, start = 0; + + if (cleanup_mode == CLEANUP_NONE && sb->len) + return 0; + + /* See if the template is just a prefix of the message. */ + if (template_file && strbuf_read_file(&tmpl, template_file, 0) > 0) { + stripspace(&tmpl, cleanup_mode == CLEANUP_ALL); + if (start + tmpl.len <= sb->len && + memcmp(tmpl.buf, sb->buf + start, tmpl.len) == 0) + start += tmpl.len; + } + strbuf_release(&tmpl); + + /* 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; +} + +static const char *find_author_by_nickname(const char *name) +{ + struct rev_info revs; + struct commit *commit; + struct strbuf buf = STRBUF_INIT; + 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); + 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); + return strbuf_detach(&buf, NULL); + } + die("No existing author found with '%s'", name); +} + + +static void handle_untracked_files_arg(struct wt_status *s) +{ + if (!untracked_files_arg) + ; /* default already initialized */ + else if (!strcmp(untracked_files_arg, "no")) + s->show_untracked_files = SHOW_NO_UNTRACKED_FILES; + else if (!strcmp(untracked_files_arg, "normal")) + s->show_untracked_files = SHOW_NORMAL_UNTRACKED_FILES; + else if (!strcmp(untracked_files_arg, "all")) + s->show_untracked_files = SHOW_ALL_UNTRACKED_FILES; + else + die("Invalid untracked files mode '%s'", untracked_files_arg); +} + +static int parse_and_validate_options(int argc, const char *argv[], + const char * const usage[], + const char *prefix, + struct wt_status *s) +{ + int f = 0; + + argc = parse_options(argc, argv, prefix, builtin_commit_options, usage, + 0); + + if (force_author && !strchr(force_author, '>')) + force_author = find_author_by_nickname(force_author); + + if (force_author && renew_authorship) + die("Using both --reset-author and --author does not make sense"); + + if (logfile || message.len || use_message) + use_editor = 0; + if (edit_flag) + use_editor = 1; + if (!use_editor) + setenv("GIT_EDITOR", ":", 1); + + if (get_sha1("HEAD", head_sha1)) + initial_commit = 1; + + /* 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 (use_message) + f++; + if (edit_message) + f++; + if (logfile) + f++; + if (f > 1) + die("Only one of -c/-C/-F can be used."); + if (message.len && f > 0) + die("Option -m cannot be combined with -c/-C/-F."); + if (edit_message) + 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"; + const char *out_enc; + char *enc, *end; + struct commit *commit; + + if (get_sha1(use_message, sha1)) + die("could not lookup commit %s", use_message); + commit = lookup_commit_reference(sha1); + if (!commit || parse_commit(commit)) + die("could not parse commit %s", use_message); + + enc = strstr(commit->buffer, "\nencoding"); + if (enc) { + end = strchr(enc + 10, '\n'); + enc = xstrndup(enc + 10, end - (enc + 10)); + } else { + enc = utf8; + } + out_enc = git_commit_encoding ? git_commit_encoding : utf8; + + if (strcmp(out_enc, enc)) + use_message_buffer = + reencode_string(commit->buffer, out_enc, 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); + if (enc != utf8) + free(enc); + } + + if (!!also + !!only + !!all + !!interactive > 1) + die("Only one of --include/--only/--all/--interactive 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."); + else if (interactive && argc > 0) + die("Paths with --interactive does not make sense."); + + if (null_termination && status_format == STATUS_FORMAT_LONG) + status_format = STATUS_FORMAT_PORCELAIN; + if (status_format != STATUS_FORMAT_LONG) + dry_run = 1; + + return argc; +} + +static int dry_run_commit(int argc, const char **argv, const char *prefix, + struct wt_status *s) +{ + int commitable; + const char *index_file; + + index_file = prepare_index(argc, argv, prefix, 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, "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 (!strcmp(k, "status.submodulesummary")) { + int is_bool; + s->submodule_summary = git_config_bool_or_int(k, v, &is_bool); + if (is_bool && s->submodule_summary) + s->submodule_summary = -1; + return 0; + } + if (!strcmp(k, "status.color") || !strcmp(k, "color.status")) { + s->use_color = git_config_colorbool(k, v, -1); + return 0; + } + if (!prefixcmp(k, "status.color.") || !prefixcmp(k, "color.status.")) { + int slot = parse_status_slot(k, 13); + if (slot < 0) + return 0; + if (!v) + return config_error_nonbool(k); + color_parse(v, k, s->color_palette[slot]); + return 0; + } + if (!strcmp(k, "status.relativepaths")) { + s->relative_paths = git_config_bool(k, v); + return 0; + } + if (!strcmp(k, "status.showuntrackedfiles")) { + if (!v) + return config_error_nonbool(k); + else if (!strcmp(v, "no")) + s->show_untracked_files = SHOW_NO_UNTRACKED_FILES; + else if (!strcmp(v, "normal")) + s->show_untracked_files = SHOW_NORMAL_UNTRACKED_FILES; + else if (!strcmp(v, "all")) + s->show_untracked_files = SHOW_ALL_UNTRACKED_FILES; + else + return error("Invalid untracked files mode '%s'", v); + return 0; + } + return git_diff_ui_config(k, v, NULL); +} + +int cmd_status(int argc, const char **argv, const char *prefix) +{ + struct wt_status s; + int fd; + unsigned char sha1[20]; + static struct option builtin_status_options[] = { + OPT__VERBOSE(&verbose), + OPT_SET_INT('s', "short", &status_format, + "show status concisely", STATUS_FORMAT_SHORT), + OPT_BOOLEAN('b', "branch", &status_show_branch, + "show branch information"), + OPT_SET_INT(0, "porcelain", &status_format, + "show porcelain output format", + STATUS_FORMAT_PORCELAIN), + OPT_BOOLEAN('z', "null", &null_termination, + "terminate entries with NUL"), + { OPTION_STRING, 'u', "untracked-files", &untracked_files_arg, + "mode", + "show untracked files, optional modes: all, normal, no. (Default: all)", + PARSE_OPT_OPTARG, NULL, (intptr_t)"all" }, + OPT_BOOLEAN(0, "ignored", &show_ignored_in_status, + "show ignored files"), + { OPTION_STRING, 0, "ignore-submodules", &ignore_submodule_arg, "when", + "ignore changes to submodules, optional when: all, dirty, untracked. (Default: all)", + PARSE_OPT_OPTARG, NULL, (intptr_t)"all" }, + OPT_END(), + }; + + if (null_termination && status_format == STATUS_FORMAT_LONG) + status_format = STATUS_FORMAT_PORCELAIN; + + wt_status_prepare(&s); + git_config(git_status_config, &s); + in_merge = file_exists(git_path("MERGE_HEAD")); + argc = parse_options(argc, argv, prefix, + builtin_status_options, + builtin_status_usage, 0); + handle_untracked_files_arg(&s); + 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) { + if (active_cache_changed && + !write_cache(fd, active_cache, active_nr)) + commit_locked_index(&index_lock); + else + rollback_lock_file(&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); + + if (s.relative_paths) + s.prefix = prefix; + if (s.use_color == -1) + s.use_color = git_use_color_default; + if (diff_use_color_default == -1) + diff_use_color_default = git_use_color_default; + + switch (status_format) { + case STATUS_FORMAT_SHORT: + wt_shortstatus_print(&s, null_termination, status_show_branch); + break; + case STATUS_FORMAT_PORCELAIN: + wt_porcelain_print(&s, null_termination); + break; + 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) +{ + struct rev_info rev; + struct commit *commit; + 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) + 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 (!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); + + 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.rename_limit = 100; + rev.diffopt.break_opt = 0; + diff_setup_done(&rev.diffopt); + + 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; + + 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; + } + + 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; + const char *index_file, *reflog_msg; + char *nl, *p; + unsigned char commit_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; + + wt_status_prepare(&s); + git_config(git_commit_config, &s); + in_merge = file_exists(git_path("MERGE_HEAD")); + s.in_merge = in_merge; + + if (s.use_color == -1) + s.use_color = git_use_color_default; + argc = parse_and_validate_options(argc, argv, builtin_commit_usage, + prefix, &s); + if (dry_run) { + if (diff_use_color_default == -1) + diff_use_color_default = git_use_color_default; + return dry_run_commit(argc, argv, prefix, &s); + } + index_file = prepare_index(argc, argv, prefix, 0); + + /* Set up everything for writing the commit object. This includes + running hooks, writing the trees, and interacting with the user. */ + if (!prepare_to_commit(index_file, prefix, &s)) { + rollback_index_files(); + return 1; + } + + /* Determine parents */ + reflog_msg = getenv("GIT_REFLOG_ACTION"); + if (initial_commit) { + 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) + pptr = &commit_list_insert(c->item, pptr)->next; + } else if (in_merge) { + struct strbuf m = STRBUF_INIT; + FILE *fp; + + if (!reflog_msg) + reflog_msg = "commit (merge)"; + pptr = &commit_list_insert(lookup_commit(head_sha1), 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) { + 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; + } + 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 = "commit"; + pptr = &commit_list_insert(lookup_commit(head_sha1), 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 (message_is_empty(&sb) && !allow_empty_message) { + rollback_index_files(); + fprintf(stderr, "Aborting commit due to empty commit message.\n"); + exit(1); + } + + if (commit_tree(sb.buf, active_cache_tree->sha1, parents, commit_sha1, + fmt_ident(author_name, author_email, author_date, + IDENT_ERROR_ON_NO_NAME))) { + rollback_index_files(); + die("failed to write commit object"); + } + + ref_lock = lock_any_ref_for_update("HEAD", + initial_commit ? NULL : head_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, commit_sha1, sb.buf) < 0) { + rollback_index_files(); + die("cannot update HEAD ref"); + } + + 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) { + copy_note_for_rewrite(cfg, head_sha1, commit_sha1); + finish_copy_notes_for_rewrite(cfg); + } + run_rewrite_hook(head_sha1, commit_sha1); + } + if (!quiet) + print_summary(prefix, commit_sha1); + + return 0; +} |