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-rw-r--r--fmt-merge-msg.c656
1 files changed, 656 insertions, 0 deletions
diff --git a/fmt-merge-msg.c b/fmt-merge-msg.c
new file mode 100644
index 0000000000..72d32bd73b
--- /dev/null
+++ b/fmt-merge-msg.c
@@ -0,0 +1,656 @@
+#include "config.h"
+#include "refs.h"
+#include "object-store.h"
+#include "diff.h"
+#include "revision.h"
+#include "tag.h"
+#include "string-list.h"
+#include "branch.h"
+#include "fmt-merge-msg.h"
+#include "commit-reach.h"
+
+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 {
+ struct object_id oid;
+ 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 {
+ struct object_id given;
+ struct object_id commit;
+ 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,
+ struct object_id *given,
+ struct object_id *commit)
+{
+ int i;
+ for (i = 0; i < table->nr; i++) {
+ if (given && !oideq(&table->item[i].given, given))
+ continue;
+ if (commit && !oideq(&table->item[i].commit, commit))
+ continue;
+ return &table->item[i];
+ }
+ return NULL;
+}
+
+static void add_merge_parent(struct merge_parents *table,
+ struct object_id *given,
+ struct object_id *commit)
+{
+ if (table->nr && find_merge_parent(table, given, commit))
+ return;
+ ALLOC_GROW(table->item, table->nr + 1, table->alloc);
+ oidcpy(&table->item[table->nr].given, given);
+ oidcpy(&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;
+ const char *origin, *tag_name;
+ struct src_data *src_data;
+ struct string_list_item *item;
+ int pulling_head = 0;
+ struct object_id oid;
+ const unsigned hexsz = the_hash_algo->hexsz;
+
+ if (len < hexsz + 3 || line[hexsz] != '\t')
+ return 1;
+
+ if (starts_with(line + hexsz + 1, "not-for-merge"))
+ return 0;
+
+ if (line[hexsz + 1] != '\t')
+ return 2;
+
+ i = get_oid_hex(line, &oid);
+ if (i)
+ return 3;
+
+ if (!find_merge_parent(merge_parents, &oid, NULL))
+ return 0; /* subsumed by other parents */
+
+ origin_data = xcalloc(1, sizeof(struct origin_data));
+ oidcpy(&origin_data->oid, &oid);
+
+ if (line[len - 1] == '\n')
+ line[len - 1] = 0;
+ line += hexsz + 2;
+
+ /*
+ * 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 (skip_prefix(line, "branch ", &origin)) {
+ origin_data->is_local_branch = 1;
+ string_list_append(&src_data->branch, origin);
+ src_data->head_status |= 2;
+ } else if (skip_prefix(line, "tag ", &tag_name)) {
+ origin = line;
+ string_list_append(&src_data->tag, tag_name);
+ src_data->head_status |= 2;
+ } else if (skip_prefix(line, "remote-tracking branch ", &origin)) {
+ 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
+ origin = xstrfmt("%s of %s", origin, src);
+ 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;
+ }
+ strbuf_complete_line(out);
+ }
+ strbuf_release(&desc);
+}
+
+#define util_as_integral(elem) ((intptr_t)((elem)->util))
+
+static void record_person_from_buf(int which, struct string_list *people,
+ const char *buffer)
+{
+ char *name_buf, *name, *name_end;
+ struct string_list_item *elem;
+ const char *field;
+
+ field = (which == 'a') ? "\nauthor " : "\ncommitter ";
+ name = strstr(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 void record_person(int which, struct string_list *people,
+ struct commit *commit)
+{
+ const char *buffer = get_commit_buffer(commit, NULL);
+ record_person_from_buf(which, people, buffer);
+ unuse_commit_buffer(commit, buffer);
+}
+
+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_addstr(out, 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 &&
+ skip_prefix(me, them->items->string, &me) &&
+ starts_with(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)
+{
+ QSORT(authors->items, authors->nr,
+ cmp_string_list_util_as_integral);
+ QSORT(committers->items, committers->nr,
+ 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 struct object_id *oid = &origin_data->oid;
+ int limit = opts->shortlog_len;
+
+ branch = deref_tag(the_repository, parse_object(the_repository, oid),
+ oid_to_hex(oid),
+ the_hash_algo->hexsz);
+ 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,
+ oid_to_hex(&commit->object.oid));
+ else
+ string_list_append_nodup(&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_addstr(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++) {
+ struct object_id *oid = origins.items[i].util;
+ enum object_type type;
+ unsigned long size, len;
+ char *buf = read_object_file(oid, &type, &size);
+ struct signature_check sigc = { NULL };
+ struct strbuf sig = STRBUF_INIT;
+
+ if (!buf || type != OBJ_TAG)
+ goto next;
+ len = parse_signature(buf, size);
+
+ if (size == len)
+ ; /* merely annotated */
+ else if (check_signature(buf, len, buf + len, size - len, &sigc) &&
+ !sigc.gpg_output)
+ strbuf_addstr(&sig, "gpg verification failed.\n");
+ else
+ strbuf_addstr(&sig, sigc.gpg_output);
+ signature_check_clear(&sigc);
+
+ 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, struct object_id *head)
+{
+ struct commit_list *parents;
+ 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');
+ const char *q;
+ struct object_id oid;
+ struct commit *parent;
+ struct object *obj;
+
+ len = newline ? newline - p : strlen(p);
+ pos += len + !!newline;
+
+ if (parse_oid_hex(p, &oid, &q) ||
+ q[0] != '\t' ||
+ q[1] != '\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(the_repository, &oid);
+ parent = (struct commit *)peel_to_type(NULL, 0, obj, OBJ_COMMIT);
+ if (!parent)
+ continue;
+ commit_list_insert(parent, &parents);
+ add_merge_parent(result, &obj->oid, &parent->object.oid);
+ }
+ head_commit = lookup_commit(the_repository, head);
+ if (head_commit)
+ commit_list_insert(head_commit, &parents);
+ reduce_heads_replace(&parents);
+
+ while (parents) {
+ struct commit *cmit = pop_commit(&parents);
+ for (i = 0; i < result->nr; i++)
+ if (oideq(&result->item[i].commit, &cmit->object.oid))
+ result->item[i].used = 1;
+ }
+
+ 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;
+ struct object_id head_oid;
+ 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", RESOLVE_REF_READING, &head_oid, 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_oid);
+
+ /* 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_oid, "HEAD");
+ repo_init_revisions(the_repository, &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;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-05 16:49:43 +0000