diff options
Diffstat (limited to 'builtin/fmt-merge-msg.c')
| -rw-r--r-- | builtin/fmt-merge-msg.c | 372 |
1 files changed, 372 insertions, 0 deletions
diff --git a/builtin/fmt-merge-msg.c b/builtin/fmt-merge-msg.c new file mode 100644 index 0000000000..7e2f22589d --- /dev/null +++ b/builtin/fmt-merge-msg.c @@ -0,0 +1,372 @@ +#include "builtin.h" +#include "cache.h" +#include "commit.h" +#include "diff.h" +#include "revision.h" +#include "tag.h" +#include "string-list.h" + +static const char * const fmt_merge_msg_usage[] = { + "git fmt-merge-msg [-m <message>] [--log[=<n>]|--no-log] [--file <file>]", + NULL +}; + +static int shortlog_len; + +static 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; + shortlog_len = git_config_bool_or_int(key, value, &is_bool); + if (!is_bool && shortlog_len < 0) + return error("%s: negative length %s", key, value); + if (is_bool && shortlog_len) + shortlog_len = DEFAULT_MERGE_LOG_LEN; + } + return 0; +} + +struct src_data { + struct string_list branch, tag, r_branch, generic; + int head_status; +}; + +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; + +static int handle_line(char *line) +{ + int i, len = strlen(line); + unsigned char *sha1; + char *src, *origin; + struct src_data *src_data; + struct string_list_item *item; + int pulling_head = 0; + + if (len < 43 || line[40] != '\t') + return 1; + + if (!prefixcmp(line + 41, "not-for-merge")) + return 0; + + if (line[41] != '\t') + return 2; + + line[40] = 0; + sha1 = xmalloc(20); + i = get_sha1(line, sha1); + line[40] = '\t'; + if (i) + return 3; + + if (line[len - 1] == '\n') + line[len - 1] = 0; + line += 42; + + 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 (!prefixcmp(line, "branch ")) { + origin = line + 7; + string_list_append(&src_data->branch, origin); + src_data->head_status |= 2; + } else if (!prefixcmp(line, "tag ")) { + origin = line; + string_list_append(&src_data->tag, origin + 4); + src_data->head_status |= 2; + } else if (!prefixcmp(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; + } + string_list_append(&origins, origin)->util = sha1; + 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 shortlog(const char *name, unsigned char *sha1, + struct commit *head, struct rev_info *rev, int limit, + struct strbuf *out) +{ + int i, count = 0; + struct commit *commit; + struct object *branch; + struct string_list subjects = STRING_LIST_INIT_DUP; + int flags = UNINTERESTING | TREESAME | SEEN | SHOWN | ADDED; + struct strbuf sb = STRBUF_INIT; + + branch = deref_tag(parse_object(sha1), sha1_to_hex(sha1), 40); + if (!branch || branch->type != OBJ_COMMIT) + return; + + setup_revisions(0, NULL, rev, NULL); + rev->ignore_merges = 1; + 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}; + + /* ignore merges */ + if (commit->parents && commit->parents->next) + continue; + + 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 (count > limit) + strbuf_addf(out, "\n* %s: (%d commits)\n", name, count); + else + strbuf_addf(out, "\n* %s:\n", 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(&subjects, 0); +} + +static void do_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 int do_fmt_merge_msg(int merge_title, struct strbuf *in, + struct strbuf *out, int shortlog_len) { + int i = 0, pos = 0; + unsigned char head_sha1[20]; + const char *current_branch; + + /* get current branch */ + current_branch = resolve_ref("HEAD", head_sha1, 1, NULL); + if (!current_branch) + die("No current branch"); + if (!prefixcmp(current_branch, "refs/heads/")) + current_branch += 11; + + /* 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)) + die ("Error in line %d: %.*s", i, len, p); + } + + if (!srcs.nr) + return 0; + + if (merge_title) + do_fmt_merge_msg_title(out, current_branch); + + if (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; + + if (suffixcmp(out->buf, "\n")) + strbuf_addch(out, '\n'); + + for (i = 0; i < origins.nr; i++) + shortlog(origins.items[i].string, origins.items[i].util, + head, &rev, shortlog_len, out); + } + return 0; +} + +int fmt_merge_msg(struct strbuf *in, struct strbuf *out, + int merge_title, int shortlog_len) { + return do_fmt_merge_msg(merge_title, in, out, shortlog_len); +} + +int cmd_fmt_merge_msg(int argc, const char **argv, const char *prefix) +{ + const char *inpath = NULL; + const char *message = NULL; + struct option options[] = { + { OPTION_INTEGER, 0, "log", &shortlog_len, "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", + "alias for --log (deprecated)", + PARSE_OPT_OPTARG | PARSE_OPT_HIDDEN, NULL, + DEFAULT_MERGE_LOG_LEN }, + OPT_STRING('m', "message", &message, "text", + "use <text> as start of message"), + OPT_FILENAME('F', "file", &inpath, "file to read from"), + OPT_END() + }; + + FILE *in = stdin; + struct strbuf input = STRBUF_INIT, output = STRBUF_INIT; + int ret; + + 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 (message && !shortlog_len) { + char nl = '\n'; + write_in_full(STDOUT_FILENO, message, strlen(message)); + write_in_full(STDOUT_FILENO, &nl, 1); + return 0; + } + if (shortlog_len < 0) + die("Negative --log=%d", shortlog_len); + + 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); + ret = fmt_merge_msg(&input, &output, + message ? 0 : 1, + shortlog_len); + + if (ret) + return ret; + write_in_full(STDOUT_FILENO, output.buf, output.len); + return 0; +} |