#include "builtin.h" #include "cache.h" #include "commit.h" #include "diff.h" #include "revision.h" #include "tag.h" #include "string-list.h" #include "branch.h" #include "fmt-merge-msg.h" #include "gpg-interface.h" static const char * const fmt_merge_msg_usage[] = { N_("git fmt-merge-msg [-m <message>] [--log[=<n>]|--no-log] [--file <file>]"), NULL }; static int use_branch_desc; int fmt_merge_msg_config(const char *key, const char *value, void *cb) { if (!strcmp(key, "merge.log") || !strcmp(key, "merge.summary")) { int is_bool; merge_log_config = git_config_bool_or_int(key, value, &is_bool); if (!is_bool && merge_log_config < 0) return error("%s: negative length %s", key, value); if (is_bool && merge_log_config) merge_log_config = DEFAULT_MERGE_LOG_LEN; } else if (!strcmp(key, "merge.branchdesc")) { use_branch_desc = git_config_bool(key, value); } else { return git_default_config(key, value, cb); } return 0; } /* merge data per repository where the merged tips came from */ struct src_data { struct string_list branch, tag, r_branch, generic; int head_status; }; struct origin_data { unsigned char sha1[20]; unsigned is_local_branch:1; }; static void init_src_data(struct src_data *data) { data->branch.strdup_strings = 1; data->tag.strdup_strings = 1; data->r_branch.strdup_strings = 1; data->generic.strdup_strings = 1; } static struct string_list srcs = STRING_LIST_INIT_DUP; static struct string_list origins = STRING_LIST_INIT_DUP; struct merge_parents { int alloc, nr; struct merge_parent { unsigned char given[20]; unsigned char commit[20]; unsigned char used; } *item; }; /* * I know, I know, this is inefficient, but you won't be pulling and merging * hundreds of heads at a time anyway. */ static struct merge_parent *find_merge_parent(struct merge_parents *table, unsigned char *given, unsigned char *commit) { int i; for (i = 0; i < table->nr; i++) { if (given && hashcmp(table->item[i].given, given)) continue; if (commit && hashcmp(table->item[i].commit, commit)) continue; return &table->item[i]; } return NULL; } static void add_merge_parent(struct merge_parents *table, unsigned char *given, unsigned char *commit) { if (table->nr && find_merge_parent(table, given, commit)) return; ALLOC_GROW(table->item, table->nr + 1, table->alloc); hashcpy(table->item[table->nr].given, given); hashcpy(table->item[table->nr].commit, commit); table->item[table->nr].used = 0; table->nr++; } static int handle_line(char *line, struct merge_parents *merge_parents) { int i, len = strlen(line); struct origin_data *origin_data; char *src, *origin; struct src_data *src_data; struct string_list_item *item; int pulling_head = 0; unsigned char sha1[20]; if (len < 43 || line[40] != '\t') return 1; if (starts_with(line + 41, "not-for-merge")) return 0; if (line[41] != '\t') return 2; i = get_sha1_hex(line, sha1); if (i) return 3; if (!find_merge_parent(merge_parents, sha1, NULL)) return 0; /* subsumed by other parents */ origin_data = xcalloc(1, sizeof(struct origin_data)); hashcpy(origin_data->sha1, sha1); if (line[len - 1] == '\n') line[len - 1] = 0; line += 42; /* * At this point, line points at the beginning of comment e.g. * "branch 'frotz' of git://that/repository.git". * Find the repository name and point it with src. */ src = strstr(line, " of "); if (src) { *src = 0; src += 4; pulling_head = 0; } else { src = line; pulling_head = 1; } item = unsorted_string_list_lookup(&srcs, src); if (!item) { item = string_list_append(&srcs, src); item->util = xcalloc(1, sizeof(struct src_data)); init_src_data(item->util); } src_data = item->util; if (pulling_head) { origin = src; src_data->head_status |= 1; } else if (starts_with(line, "branch ")) { origin_data->is_local_branch = 1; origin = line + 7; string_list_append(&src_data->branch, origin); src_data->head_status |= 2; } else if (starts_with(line, "tag ")) { origin = line; string_list_append(&src_data->tag, origin + 4); src_data->head_status |= 2; } else if (starts_with(line, "remote-tracking branch ")) { origin = line + strlen("remote-tracking branch "); string_list_append(&src_data->r_branch, origin); src_data->head_status |= 2; } else { origin = src; string_list_append(&src_data->generic, line); src_data->head_status |= 2; } if (!strcmp(".", src) || !strcmp(src, origin)) { int len = strlen(origin); if (origin[0] == '\'' && origin[len - 1] == '\'') origin = xmemdupz(origin + 1, len - 2); } else { char *new_origin = xmalloc(strlen(origin) + strlen(src) + 5); sprintf(new_origin, "%s of %s", origin, src); origin = new_origin; } if (strcmp(".", src)) origin_data->is_local_branch = 0; string_list_append(&origins, origin)->util = origin_data; return 0; } static void print_joined(const char *singular, const char *plural, struct string_list *list, struct strbuf *out) { if (list->nr == 0) return; if (list->nr == 1) { strbuf_addf(out, "%s%s", singular, list->items[0].string); } else { int i; strbuf_addstr(out, plural); for (i = 0; i < list->nr - 1; i++) strbuf_addf(out, "%s%s", i > 0 ? ", " : "", list->items[i].string); strbuf_addf(out, " and %s", list->items[list->nr - 1].string); } } static void add_branch_desc(struct strbuf *out, const char *name) { struct strbuf desc = STRBUF_INIT; if (!read_branch_desc(&desc, name)) { const char *bp = desc.buf; while (*bp) { const char *ep = strchrnul(bp, '\n'); if (*ep) ep++; strbuf_addf(out, " : %.*s", (int)(ep - bp), bp); bp = ep; } if (out->buf[out->len - 1] != '\n') strbuf_addch(out, '\n'); } strbuf_release(&desc); } #define util_as_integral(elem) ((intptr_t)((elem)->util)) static void record_person(int which, struct string_list *people, struct commit *commit) { char *name_buf, *name, *name_end; struct string_list_item *elem; const char *field; field = (which == 'a') ? "\nauthor " : "\ncommitter "; name = strstr(commit->buffer, field); if (!name) return; name += strlen(field); name_end = strchrnul(name, '<'); if (*name_end) name_end--; while (isspace(*name_end) && name <= name_end) name_end--; if (name_end < name) return; name_buf = xmemdupz(name, name_end - name + 1); elem = string_list_lookup(people, name_buf); if (!elem) { elem = string_list_insert(people, name_buf); elem->util = (void *)0; } elem->util = (void*)(util_as_integral(elem) + 1); free(name_buf); } static int cmp_string_list_util_as_integral(const void *a_, const void *b_) { const struct string_list_item *a = a_, *b = b_; return util_as_integral(b) - util_as_integral(a); } static void add_people_count(struct strbuf *out, struct string_list *people) { if (people->nr == 1) strbuf_addf(out, "%s", people->items[0].string); else if (people->nr == 2) strbuf_addf(out, "%s (%d) and %s (%d)", people->items[0].string, (int)util_as_integral(&people->items[0]), people->items[1].string, (int)util_as_integral(&people->items[1])); else if (people->nr) strbuf_addf(out, "%s (%d) and others", people->items[0].string, (int)util_as_integral(&people->items[0])); } static void credit_people(struct strbuf *out, struct string_list *them, int kind) { const char *label; const char *me; if (kind == 'a') { label = "By"; me = git_author_info(IDENT_NO_DATE); } else { label = "Via"; me = git_committer_info(IDENT_NO_DATE); } if (!them->nr || (them->nr == 1 && me && (me = skip_prefix(me, them->items->string)) != NULL && skip_prefix(me, " <"))) return; strbuf_addf(out, "\n%c %s ", comment_line_char, label); add_people_count(out, them); } static void add_people_info(struct strbuf *out, struct string_list *authors, struct string_list *committers) { if (authors->nr) qsort(authors->items, authors->nr, sizeof(authors->items[0]), cmp_string_list_util_as_integral); if (committers->nr) qsort(committers->items, committers->nr, sizeof(committers->items[0]), cmp_string_list_util_as_integral); credit_people(out, authors, 'a'); credit_people(out, committers, 'c'); } static void shortlog(const char *name, struct origin_data *origin_data, struct commit *head, struct rev_info *rev, struct fmt_merge_msg_opts *opts, struct strbuf *out) { int i, count = 0; struct commit *commit; struct object *branch; struct string_list subjects = STRING_LIST_INIT_DUP; struct string_list authors = STRING_LIST_INIT_DUP; struct string_list committers = STRING_LIST_INIT_DUP; int flags = UNINTERESTING | TREESAME | SEEN | SHOWN | ADDED; struct strbuf sb = STRBUF_INIT; const unsigned char *sha1 = origin_data->sha1; int limit = opts->shortlog_len; branch = deref_tag(parse_object(sha1), sha1_to_hex(sha1), 40); if (!branch || branch->type != OBJ_COMMIT) return; setup_revisions(0, NULL, rev, NULL); add_pending_object(rev, branch, name); add_pending_object(rev, &head->object, "^HEAD"); head->object.flags |= UNINTERESTING; if (prepare_revision_walk(rev)) die("revision walk setup failed"); while ((commit = get_revision(rev)) != NULL) { struct pretty_print_context ctx = {0}; if (commit->parents && commit->parents->next) { /* do not list a merge but count committer */ if (opts->credit_people) record_person('c', &committers, commit); continue; } if (!count && opts->credit_people) /* the 'tip' committer */ record_person('c', &committers, commit); if (opts->credit_people) record_person('a', &authors, commit); count++; if (subjects.nr > limit) continue; format_commit_message(commit, "%s", &sb, &ctx); strbuf_ltrim(&sb); if (!sb.len) string_list_append(&subjects, sha1_to_hex(commit->object.sha1)); else string_list_append(&subjects, strbuf_detach(&sb, NULL)); } if (opts->credit_people) add_people_info(out, &authors, &committers); if (count > limit) strbuf_addf(out, "\n* %s: (%d commits)\n", name, count); else strbuf_addf(out, "\n* %s:\n", name); if (origin_data->is_local_branch && use_branch_desc) add_branch_desc(out, name); for (i = 0; i < subjects.nr; i++) if (i >= limit) strbuf_addf(out, " ...\n"); else strbuf_addf(out, " %s\n", subjects.items[i].string); clear_commit_marks((struct commit *)branch, flags); clear_commit_marks(head, flags); free_commit_list(rev->commits); rev->commits = NULL; rev->pending.nr = 0; string_list_clear(&authors, 0); string_list_clear(&committers, 0); string_list_clear(&subjects, 0); } static void fmt_merge_msg_title(struct strbuf *out, const char *current_branch) { int i = 0; char *sep = ""; strbuf_addstr(out, "Merge "); for (i = 0; i < srcs.nr; i++) { struct src_data *src_data = srcs.items[i].util; const char *subsep = ""; strbuf_addstr(out, sep); sep = "; "; if (src_data->head_status == 1) { strbuf_addstr(out, srcs.items[i].string); continue; } if (src_data->head_status == 3) { subsep = ", "; strbuf_addstr(out, "HEAD"); } if (src_data->branch.nr) { strbuf_addstr(out, subsep); subsep = ", "; print_joined("branch ", "branches ", &src_data->branch, out); } if (src_data->r_branch.nr) { strbuf_addstr(out, subsep); subsep = ", "; print_joined("remote-tracking branch ", "remote-tracking branches ", &src_data->r_branch, out); } if (src_data->tag.nr) { strbuf_addstr(out, subsep); subsep = ", "; print_joined("tag ", "tags ", &src_data->tag, out); } if (src_data->generic.nr) { strbuf_addstr(out, subsep); print_joined("commit ", "commits ", &src_data->generic, out); } if (strcmp(".", srcs.items[i].string)) strbuf_addf(out, " of %s", srcs.items[i].string); } if (!strcmp("master", current_branch)) strbuf_addch(out, '\n'); else strbuf_addf(out, " into %s\n", current_branch); } static void fmt_tag_signature(struct strbuf *tagbuf, struct strbuf *sig, const char *buf, unsigned long len) { const char *tag_body = strstr(buf, "\n\n"); if (tag_body) { tag_body += 2; strbuf_add(tagbuf, tag_body, buf + len - tag_body); } strbuf_complete_line(tagbuf); if (sig->len) { strbuf_addch(tagbuf, '\n'); strbuf_add_commented_lines(tagbuf, sig->buf, sig->len); } } static void fmt_merge_msg_sigs(struct strbuf *out) { int i, tag_number = 0, first_tag = 0; struct strbuf tagbuf = STRBUF_INIT; for (i = 0; i < origins.nr; i++) { unsigned char *sha1 = origins.items[i].util; enum object_type type; unsigned long size, len; char *buf = read_sha1_file(sha1, &type, &size); struct strbuf sig = STRBUF_INIT; if (!buf || type != OBJ_TAG) goto next; len = parse_signature(buf, size); if (size == len) ; /* merely annotated */ else if (verify_signed_buffer(buf, len, buf + len, size - len, &sig, NULL)) { if (!sig.len) strbuf_addstr(&sig, "gpg verification failed.\n"); } if (!tag_number++) { fmt_tag_signature(&tagbuf, &sig, buf, len); first_tag = i; } else { if (tag_number == 2) { struct strbuf tagline = STRBUF_INIT; strbuf_addch(&tagline, '\n'); strbuf_add_commented_lines(&tagline, origins.items[first_tag].string, strlen(origins.items[first_tag].string)); strbuf_insert(&tagbuf, 0, tagline.buf, tagline.len); strbuf_release(&tagline); } strbuf_addch(&tagbuf, '\n'); strbuf_add_commented_lines(&tagbuf, origins.items[i].string, strlen(origins.items[i].string)); fmt_tag_signature(&tagbuf, &sig, buf, len); } strbuf_release(&sig); next: free(buf); } if (tagbuf.len) { strbuf_addch(out, '\n'); strbuf_addbuf(out, &tagbuf); } strbuf_release(&tagbuf); } static void find_merge_parents(struct merge_parents *result, struct strbuf *in, unsigned char *head) { struct commit_list *parents, *next; struct commit *head_commit; int pos = 0, i, j; parents = NULL; while (pos < in->len) { int len; char *p = in->buf + pos; char *newline = strchr(p, '\n'); unsigned char sha1[20]; struct commit *parent; struct object *obj; len = newline ? newline - p : strlen(p); pos += len + !!newline; if (len < 43 || get_sha1_hex(p, sha1) || p[40] != '\t' || p[41] != '\t') continue; /* skip not-for-merge */ /* * Do not use get_merge_parent() here; we do not have * "name" here and we do not want to contaminate its * util field yet. */ obj = parse_object(sha1); parent = (struct commit *)peel_to_type(NULL, 0, obj, OBJ_COMMIT); if (!parent) continue; commit_list_insert(parent, &parents); add_merge_parent(result, obj->sha1, parent->object.sha1); } head_commit = lookup_commit(head); if (head_commit) commit_list_insert(head_commit, &parents); parents = reduce_heads(parents); while (parents) { for (i = 0; i < result->nr; i++) if (!hashcmp(result->item[i].commit, parents->item->object.sha1)) result->item[i].used = 1; next = parents->next; free(parents); parents = next; } for (i = j = 0; i < result->nr; i++) { if (result->item[i].used) { if (i != j) result->item[j] = result->item[i]; j++; } } result->nr = j; } int fmt_merge_msg(struct strbuf *in, struct strbuf *out, struct fmt_merge_msg_opts *opts) { int i = 0, pos = 0; unsigned char head_sha1[20]; const char *current_branch; void *current_branch_to_free; struct merge_parents merge_parents; memset(&merge_parents, 0, sizeof(merge_parents)); /* get current branch */ current_branch = current_branch_to_free = resolve_refdup("HEAD", head_sha1, 1, NULL); if (!current_branch) die("No current branch"); if (starts_with(current_branch, "refs/heads/")) current_branch += 11; find_merge_parents(&merge_parents, in, head_sha1); /* get a line */ while (pos < in->len) { int len; char *newline, *p = in->buf + pos; newline = strchr(p, '\n'); len = newline ? newline - p : strlen(p); pos += len + !!newline; i++; p[len] = 0; if (handle_line(p, &merge_parents)) die ("Error in line %d: %.*s", i, len, p); } if (opts->add_title && srcs.nr) fmt_merge_msg_title(out, current_branch); if (origins.nr) fmt_merge_msg_sigs(out); if (opts->shortlog_len) { struct commit *head; struct rev_info rev; head = lookup_commit_or_die(head_sha1, "HEAD"); init_revisions(&rev, NULL); rev.commit_format = CMIT_FMT_ONELINE; rev.ignore_merges = 1; rev.limited = 1; strbuf_complete_line(out); for (i = 0; i < origins.nr; i++) shortlog(origins.items[i].string, origins.items[i].util, head, &rev, opts, out); } strbuf_complete_line(out); free(current_branch_to_free); free(merge_parents.item); return 0; } int cmd_fmt_merge_msg(int argc, const char **argv, const char *prefix) { const char *inpath = NULL; const char *message = NULL; int shortlog_len = -1; struct option options[] = { { OPTION_INTEGER, 0, "log", &shortlog_len, N_("n"), N_("populate log with at most <n> entries from shortlog"), PARSE_OPT_OPTARG, NULL, DEFAULT_MERGE_LOG_LEN }, { OPTION_INTEGER, 0, "summary", &shortlog_len, N_("n"), N_("alias for --log (deprecated)"), PARSE_OPT_OPTARG | PARSE_OPT_HIDDEN, NULL, DEFAULT_MERGE_LOG_LEN }, OPT_STRING('m', "message", &message, N_("text"), N_("use <text> as start of message")), OPT_FILENAME('F', "file", &inpath, N_("file to read from")), OPT_END() }; FILE *in = stdin; struct strbuf input = STRBUF_INIT, output = STRBUF_INIT; int ret; struct fmt_merge_msg_opts opts; git_config(fmt_merge_msg_config, NULL); argc = parse_options(argc, argv, prefix, options, fmt_merge_msg_usage, 0); if (argc > 0) usage_with_options(fmt_merge_msg_usage, options); if (shortlog_len < 0) shortlog_len = (merge_log_config > 0) ? merge_log_config : 0; if (inpath && strcmp(inpath, "-")) { in = fopen(inpath, "r"); if (!in) die_errno("cannot open '%s'", inpath); } if (strbuf_read(&input, fileno(in), 0) < 0) die_errno("could not read input file"); if (message) strbuf_addstr(&output, message); memset(&opts, 0, sizeof(opts)); opts.add_title = !message; opts.credit_people = 1; opts.shortlog_len = shortlog_len; ret = fmt_merge_msg(&input, &output, &opts); if (ret) return ret; write_in_full(STDOUT_FILENO, output.buf, output.len); return 0; }