diff options
Diffstat (limited to 'builtin-commit.c')
| -rw-r--r-- | builtin-commit.c | 951 |
1 files changed, 951 insertions, 0 deletions
diff --git a/builtin-commit.c b/builtin-commit.c new file mode 100644 index 0000000..45232a1 --- /dev/null +++ b/builtin-commit.c @@ -0,0 +1,951 @@ +/* + * 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 "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 "path-list.h" +#include "unpack-trees.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 unsigned char head_sha1[20], merge_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 char *logfile, *force_author, *template_file; +static char *edit_message, *use_message; +static int all, edit_flag, also, interactive, only, amend, signoff; +static int quiet, verbose, untracked_files, no_verify, allow_empty; +/* + * 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; +const char *only_include_assumed; +struct strbuf message; + +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_addch(buf, '\n'); + strbuf_addch(buf, '\n'); + } + return 0; +} + +static struct option builtin_commit_options[] = { + OPT__QUIET(&quiet), + OPT__VERBOSE(&verbose), + OPT_GROUP("Commit message options"), + + OPT_STRING('F', "file", &logfile, "FILE", "read log from file"), + OPT_STRING(0, "author", &force_author, "AUTHOR", "override author 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('s', "signoff", &signoff, "add Signed-off-by: header"), + OPT_STRING('t', "template", &template_file, "FILE", "use specified template file"), + OPT_BOOLEAN('e', "edit", &edit_flag, "force edit of commit"), + + 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, ""), + OPT_BOOLEAN('n', "no-verify", &no_verify, "bypass pre-commit hook"), + OPT_BOOLEAN(0, "amend", &amend, "amend previous commit"), + OPT_BOOLEAN(0, "untracked-files", &untracked_files, "show all untracked files"), + OPT_BOOLEAN(0, "allow-empty", &allow_empty, "ok to record an empty change"), + OPT_STRING(0, "cleanup", &cleanup_arg, "default", "how to strip spaces and #comments from message"), + + 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 path_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]; + if (ce->ce_flags & htons(CE_UPDATE)) + continue; + if (!pathspec_match(pattern, m, ce->name, 0)) + continue; + path_list_insert(ce->name, list); + } + + return report_path_error(m, pattern, prefix ? strlen(prefix) : 0); +} + +static void add_remove_files(struct path_list *list) +{ + int i; + for (i = 0; i < list->nr; i++) { + struct path_list_item *p = &(list->items[i]); + if (file_exists(p->path)) + add_file_to_cache(p->path, 0); + else + remove_file_from_cache(p->path); + } +} + +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.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); + unpack_trees(1, &t, &opts); +} + +static char *prepare_index(int argc, const char **argv, const char *prefix) +{ + int fd; + struct path_list partial; + const char **pathspec = NULL; + + if (interactive) { + interactive_add(argc, argv, prefix); + commit_style = COMMIT_AS_IS; + return get_index_file(); + } + + if (read_cache() < 0) + die("index file corrupt"); + + if (*argv) + pathspec = get_pathspec(prefix, argv); + + /* + * 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)) { + int fd = hold_locked_index(&index_lock, 1); + add_files_to_cache(0, also ? prefix : NULL, pathspec); + refresh_cache(REFRESH_QUIET); + 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 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(REFRESH_QUIET); + if (write_cache(fd, active_cache, active_nr) || + commit_locked_index(&index_lock)) + die("unable to write new_index file"); + 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 (file_exists(git_path("MERGE_HEAD"))) + die("cannot do a partial commit during a merge."); + + memset(&partial, 0, sizeof(partial)); + partial.strdup_paths = 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-%d", getpid()), 1); + + 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; + + wt_status_prepare(&s); + if (wt_status_relative_paths) + s.prefix = prefix; + + if (amend) { + s.amend = 1; + s.reference = "HEAD^1"; + } + s.verbose = verbose; + s.untracked = untracked_files; + s.index_file = index_file; + s.fp = fp; + s.nowarn = nowarn; + + wt_status_print(&s); + + return s.commitable; +} + +static const char sign_off_header[] = "Signed-off-by: "; + +static int prepare_log_message(const char *index_file, const char *prefix) +{ + struct stat statbuf; + int commitable, saved_color_setting; + struct strbuf sb; + char *buffer; + FILE *fp; + + strbuf_init(&sb, 0); + if (message.len) { + strbuf_addbuf(&sb, &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("could not read log from standard input"); + } else if (logfile) { + if (strbuf_read_file(&sb, logfile, 0) < 0) + die("could not read log file '%s': %s", + logfile, strerror(errno)); + } 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)); + } else if (!stat(git_path("MERGE_MSG"), &statbuf)) { + if (strbuf_read_file(&sb, git_path("MERGE_MSG"), 0) < 0) + die("could not read MERGE_MSG: %s", strerror(errno)); + } else if (!stat(git_path("SQUASH_MSG"), &statbuf)) { + if (strbuf_read_file(&sb, git_path("SQUASH_MSG"), 0) < 0) + die("could not read SQUASH_MSG: %s", strerror(errno)); + } else if (template_file && !stat(template_file, &statbuf)) { + if (strbuf_read_file(&sb, template_file, 0) < 0) + die("could not read %s: %s", + template_file, strerror(errno)); + } + + fp = fopen(git_path(commit_editmsg), "w"); + if (fp == NULL) + die("could not open %s", git_path(commit_editmsg)); + + if (cleanup_mode != CLEANUP_NONE) + stripspace(&sb, 0); + + if (signoff) { + struct strbuf sob; + int i; + + strbuf_init(&sob, 0); + 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 (prefixcmp(sb.buf + i, sign_off_header)) + strbuf_addch(&sb, '\n'); + strbuf_addbuf(&sb, &sob); + } + strbuf_release(&sob); + } + + if (fwrite(sb.buf, 1, sb.len, fp) < sb.len) + die("could not write commit template: %s", strerror(errno)); + + strbuf_release(&sb); + + if (!use_editor) { + struct rev_info rev; + unsigned char sha1[20]; + const char *parent = "HEAD"; + + fclose(fp); + + if (!active_nr && read_cache() < 0) + die("Cannot read index"); + + if (amend) + parent = "HEAD^1"; + + if (get_sha1(parent, sha1)) + return !!active_nr; + + init_revisions(&rev, ""); + rev.abbrev = 0; + setup_revisions(0, NULL, &rev, parent); + DIFF_OPT_SET(&rev.diffopt, QUIET); + DIFF_OPT_SET(&rev.diffopt, EXIT_WITH_STATUS); + run_diff_index(&rev, 1 /* cached */); + + return !!DIFF_OPT_TST(&rev.diffopt, HAS_CHANGES); + } + + 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.\n" + "# (Comment lines starting with '#' will "); + if (cleanup_mode == CLEANUP_ALL) + fprintf(fp, "not be included)\n"); + else /* CLEANUP_SPACE, that is. */ + fprintf(fp, "be kept.\n" + "# You can remove them yourself if you want to)\n"); + if (only_include_assumed) + fprintf(fp, "# %s\n", only_include_assumed); + + saved_color_setting = wt_status_use_color; + wt_status_use_color = 0; + commitable = run_status(fp, index_file, prefix, 1); + wt_status_use_color = saved_color_setting; + + fclose(fp); + + return commitable; +} + +/* + * Find out if the message starting at position 'start' in the strbuf + * contains only whitespace and Signed-off-by lines. + */ +static int message_is_empty(struct strbuf *sb, int start) +{ + struct strbuf tmpl; + const char *nl; + int eol, i; + + if (cleanup_mode == CLEANUP_NONE && sb->len) + return 0; + + /* See if the template is just a prefix of the message. */ + strbuf_init(&tmpl, 0); + 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 void determine_author_info(struct strbuf *sb) +{ + char *name, *email, *date; + + name = getenv("GIT_AUTHOR_NAME"); + email = getenv("GIT_AUTHOR_EMAIL"); + date = getenv("GIT_AUTHOR_DATE"); + + if (use_message) { + const char *a, *lb, *rb, *eol; + + a = strstr(use_message_buffer, "\nauthor "); + if (!a) + die("invalid commit: %s", use_message); + + lb = strstr(a + 8, " <"); + rb = strstr(a + 8, "> "); + eol = strchr(a + 8, '\n'); + if (!lb || !rb || !eol) + die("invalid commit: %s", use_message); + + name = xstrndup(a + 8, lb - (a + 8)); + email = xstrndup(lb + 2, rb - (lb + 2)); + date = xstrndup(rb + 2, eol - (rb + 2)); + } + + 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)); + } + + strbuf_addf(sb, "author %s\n", fmt_ident(name, email, date, IDENT_ERROR_ON_NO_NAME)); +} + +static int parse_and_validate_options(int argc, const char *argv[], + const char * const usage[]) +{ + int f = 0; + + argc = parse_options(argc, argv, builtin_commit_options, usage, 0); + + if (logfile || message.len || use_message) + use_editor = 0; + if (edit_flag) + use_editor = 1; + + if (get_sha1("HEAD", head_sha1)) + initial_commit = 1; + + if (!get_sha1("MERGE_HEAD", merge_head_sha1)) + in_merge = 1; + + /* Sanity check options */ + if (amend && initial_commit) + die("You have nothing to amend."); + 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) { + 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..."; + also = 0; + } + 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); + + 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."); + + return argc; +} + +int cmd_status(int argc, const char **argv, const char *prefix) +{ + const char *index_file; + int commitable; + + git_config(git_status_config); + + argc = parse_and_validate_options(argc, argv, builtin_status_usage); + + index_file = prepare_index(argc, argv, prefix); + + commitable = run_status(stdout, index_file, prefix, 0); + + rollback_index_files(); + + return commitable ? 0 : 1; +} + +static int run_hook(const char *index_file, const char *name, const char *arg) +{ + struct child_process hook; + const char *argv[3], *env[2]; + char index[PATH_MAX]; + + argv[0] = git_path("hooks/%s", name); + argv[1] = arg; + argv[2] = NULL; + snprintf(index, sizeof(index), "GIT_INDEX_FILE=%s", index_file); + env[0] = index; + env[1] = NULL; + + if (access(argv[0], X_OK) < 0) + return 0; + + memset(&hook, 0, sizeof(hook)); + hook.argv = argv; + hook.no_stdin = 1; + hook.stdout_to_stderr = 1; + hook.env = env; + + return run_command(&hook); +} + +static void print_summary(const char *prefix, const unsigned char *sha1) +{ + struct rev_info rev; + struct commit *commit; + + 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"); + + init_revisions(&rev, prefix); + setup_revisions(0, NULL, &rev, NULL); + + rev.abbrev = 0; + rev.diff = 1; + rev.diffopt.output_format = + DIFF_FORMAT_SHORTSTAT | DIFF_FORMAT_SUMMARY; + + rev.verbose_header = 1; + rev.show_root_diff = 1; + rev.commit_format = get_commit_format("format:%h: %s"); + 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("Created %scommit ", initial_commit ? "initial " : ""); + + if (!log_tree_commit(&rev, commit)) { + struct strbuf buf = STRBUF_INIT; + format_commit_message(commit, "%h: %s", &buf); + printf("%s\n", buf.buf); + strbuf_release(&buf); + } +} + +int git_commit_config(const char *k, const char *v) +{ + if (!strcmp(k, "commit.template")) { + if (!v) + return config_error_nonbool(v); + template_file = xstrdup(v); + return 0; + } + + return git_status_config(k, v); +} + +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 commit_utf8_warn[] = +"Warning: commit message does not conform to UTF-8.\n" +"You may want to amend it after fixing the message, or set the config\n" +"variable i18n.commitencoding to the encoding your project uses.\n"; + +static void add_parent(struct strbuf *sb, const unsigned char *sha1) +{ + struct object *obj = parse_object(sha1); + const char *parent = sha1_to_hex(sha1); + if (!obj) + die("Unable to find commit parent %s", parent); + if (obj->type != OBJ_COMMIT) + die("Parent %s isn't a proper commit", parent); + strbuf_addf(sb, "parent %s\n", parent); +} + +int cmd_commit(int argc, const char **argv, const char *prefix) +{ + int header_len; + struct strbuf sb; + const char *index_file, *reflog_msg; + char *nl, *p; + unsigned char commit_sha1[20]; + struct ref_lock *ref_lock; + + git_config(git_commit_config); + + argc = parse_and_validate_options(argc, argv, builtin_commit_usage); + + index_file = prepare_index(argc, argv, prefix); + + if (!no_verify && run_hook(index_file, "pre-commit", NULL)) { + rollback_index_files(); + return 1; + } + + if (!prepare_log_message(index_file, prefix) && !in_merge && + !allow_empty && !(amend && is_a_merge(head_sha1))) { + run_status(stdout, index_file, prefix, 0); + rollback_index_files(); + unlink(commit_editmsg); + return 1; + } + + /* + * Re-read the index as pre-commit hook could have updated it, + * and write it out as a tree. + */ + 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) { + rollback_index_files(); + die("Error building trees"); + } + + /* + * The commit object + */ + strbuf_init(&sb, 0); + strbuf_addf(&sb, "tree %s\n", + sha1_to_hex(active_cache_tree->sha1)); + + /* Determine parents */ + if (initial_commit) { + reflog_msg = "commit (initial)"; + } else if (amend) { + struct commit_list *c; + struct commit *commit; + + 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) + add_parent(&sb, c->item->object.sha1); + } else if (in_merge) { + struct strbuf m; + FILE *fp; + + reflog_msg = "commit (merge)"; + add_parent(&sb, head_sha1); + strbuf_init(&m, 0); + fp = fopen(git_path("MERGE_HEAD"), "r"); + if (fp == NULL) + die("could not open %s for reading: %s", + git_path("MERGE_HEAD"), strerror(errno)); + 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); + add_parent(&sb, sha1); + } + fclose(fp); + strbuf_release(&m); + } else { + reflog_msg = "commit"; + strbuf_addf(&sb, "parent %s\n", sha1_to_hex(head_sha1)); + } + + determine_author_info(&sb); + strbuf_addf(&sb, "committer %s\n", git_committer_info(IDENT_ERROR_ON_NO_NAME)); + if (!is_encoding_utf8(git_commit_encoding)) + strbuf_addf(&sb, "encoding %s\n", git_commit_encoding); + strbuf_addch(&sb, '\n'); + + /* Get the commit message and validate it */ + header_len = sb.len; + if (use_editor) { + char index[PATH_MAX]; + const char *env[2] = { index, NULL }; + snprintf(index, sizeof(index), "GIT_INDEX_FILE=%s", index_file); + launch_editor(git_path(commit_editmsg), NULL, env); + } + if (!no_verify && + run_hook(index_file, "commit-msg", git_path(commit_editmsg))) { + rollback_index_files(); + exit(1); + } + if (strbuf_read_file(&sb, git_path(commit_editmsg), 0) < 0) { + rollback_index_files(); + die("could not read commit message"); + } + + /* Truncate the message just before the diff, if any. */ + p = strstr(sb.buf, "\ndiff --git a/"); + if (p != NULL) + strbuf_setlen(&sb, p - sb.buf + 1); + + if (cleanup_mode != CLEANUP_NONE) + stripspace(&sb, cleanup_mode == CLEANUP_ALL); + if (sb.len < header_len || message_is_empty(&sb, header_len)) { + rollback_index_files(); + die("no commit message? aborting commit."); + } + strbuf_addch(&sb, '\0'); + if (is_encoding_utf8(git_commit_encoding) && !is_utf8(sb.buf)) + fprintf(stderr, commit_utf8_warn); + + if (write_sha1_file(sb.buf, sb.len - 1, commit_type, commit_sha1)) { + 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 + header_len, '\n'); + if (nl) + strbuf_setlen(&sb, nl + 1 - sb.buf); + else + strbuf_addch(&sb, '\n'); + strbuf_remove(&sb, 0, header_len); + 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("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(); + run_hook(get_index_file(), "post-commit", NULL); + if (!quiet) + print_summary(prefix, commit_sha1); + + return 0; +} |