mirror of
https://github.com/git/git
synced 2024-10-30 04:01:21 +00:00
d844808bb2
Tone down the lines that credit people involved and make them comments, so that integrators who edit their merge messages can still make use of the information, but lazy ones will not leave the unverified guesses placed on the "via" line. * jc/fmt-merge-msg-people: fmt-merge-msg: make attribution into comment lines
700 lines
18 KiB
C
700 lines
18 KiB
C
#include "builtin.h"
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#include "cache.h"
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#include "commit.h"
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#include "diff.h"
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#include "revision.h"
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#include "tag.h"
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#include "string-list.h"
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#include "branch.h"
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#include "fmt-merge-msg.h"
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#include "gpg-interface.h"
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static const char * const fmt_merge_msg_usage[] = {
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"git fmt-merge-msg [-m <message>] [--log[=<n>]|--no-log] [--file <file>]",
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NULL
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};
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static int use_branch_desc;
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int fmt_merge_msg_config(const char *key, const char *value, void *cb)
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{
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if (!strcmp(key, "merge.log") || !strcmp(key, "merge.summary")) {
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int is_bool;
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merge_log_config = git_config_bool_or_int(key, value, &is_bool);
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if (!is_bool && merge_log_config < 0)
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return error("%s: negative length %s", key, value);
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if (is_bool && merge_log_config)
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merge_log_config = DEFAULT_MERGE_LOG_LEN;
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} else if (!strcmp(key, "merge.branchdesc")) {
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use_branch_desc = git_config_bool(key, value);
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} else {
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return git_default_config(key, value, cb);
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}
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return 0;
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}
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/* merge data per repository where the merged tips came from */
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struct src_data {
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struct string_list branch, tag, r_branch, generic;
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int head_status;
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};
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struct origin_data {
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unsigned char sha1[20];
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unsigned is_local_branch:1;
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};
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static void init_src_data(struct src_data *data)
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{
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data->branch.strdup_strings = 1;
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data->tag.strdup_strings = 1;
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data->r_branch.strdup_strings = 1;
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data->generic.strdup_strings = 1;
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}
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static struct string_list srcs = STRING_LIST_INIT_DUP;
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static struct string_list origins = STRING_LIST_INIT_DUP;
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struct merge_parents {
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int alloc, nr;
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struct merge_parent {
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unsigned char given[20];
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unsigned char commit[20];
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unsigned char used;
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} *item;
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};
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/*
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* I know, I know, this is inefficient, but you won't be pulling and merging
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* hundreds of heads at a time anyway.
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*/
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static struct merge_parent *find_merge_parent(struct merge_parents *table,
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unsigned char *given,
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unsigned char *commit)
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{
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int i;
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for (i = 0; i < table->nr; i++) {
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if (given && hashcmp(table->item[i].given, given))
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continue;
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if (commit && hashcmp(table->item[i].commit, commit))
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continue;
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return &table->item[i];
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}
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return NULL;
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}
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static void add_merge_parent(struct merge_parents *table,
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unsigned char *given,
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unsigned char *commit)
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{
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if (table->nr && find_merge_parent(table, given, commit))
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return;
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ALLOC_GROW(table->item, table->nr + 1, table->alloc);
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hashcpy(table->item[table->nr].given, given);
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hashcpy(table->item[table->nr].commit, commit);
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table->item[table->nr].used = 0;
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table->nr++;
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}
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static int handle_line(char *line, struct merge_parents *merge_parents)
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{
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int i, len = strlen(line);
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struct origin_data *origin_data;
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char *src, *origin;
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struct src_data *src_data;
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struct string_list_item *item;
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int pulling_head = 0;
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unsigned char sha1[20];
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if (len < 43 || line[40] != '\t')
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return 1;
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if (!prefixcmp(line + 41, "not-for-merge"))
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return 0;
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if (line[41] != '\t')
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return 2;
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i = get_sha1_hex(line, sha1);
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if (i)
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return 3;
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if (!find_merge_parent(merge_parents, sha1, NULL))
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return 0; /* subsumed by other parents */
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origin_data = xcalloc(1, sizeof(struct origin_data));
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hashcpy(origin_data->sha1, sha1);
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if (line[len - 1] == '\n')
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line[len - 1] = 0;
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line += 42;
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/*
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* At this point, line points at the beginning of comment e.g.
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* "branch 'frotz' of git://that/repository.git".
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* Find the repository name and point it with src.
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*/
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src = strstr(line, " of ");
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if (src) {
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*src = 0;
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src += 4;
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pulling_head = 0;
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} else {
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src = line;
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pulling_head = 1;
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}
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item = unsorted_string_list_lookup(&srcs, src);
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if (!item) {
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item = string_list_append(&srcs, src);
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item->util = xcalloc(1, sizeof(struct src_data));
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init_src_data(item->util);
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}
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src_data = item->util;
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if (pulling_head) {
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origin = src;
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src_data->head_status |= 1;
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} else if (!prefixcmp(line, "branch ")) {
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origin_data->is_local_branch = 1;
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origin = line + 7;
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string_list_append(&src_data->branch, origin);
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src_data->head_status |= 2;
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} else if (!prefixcmp(line, "tag ")) {
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origin = line;
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string_list_append(&src_data->tag, origin + 4);
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src_data->head_status |= 2;
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} else if (!prefixcmp(line, "remote-tracking branch ")) {
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origin = line + strlen("remote-tracking branch ");
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string_list_append(&src_data->r_branch, origin);
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src_data->head_status |= 2;
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} else {
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origin = src;
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string_list_append(&src_data->generic, line);
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src_data->head_status |= 2;
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}
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if (!strcmp(".", src) || !strcmp(src, origin)) {
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int len = strlen(origin);
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if (origin[0] == '\'' && origin[len - 1] == '\'')
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origin = xmemdupz(origin + 1, len - 2);
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} else {
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char *new_origin = xmalloc(strlen(origin) + strlen(src) + 5);
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sprintf(new_origin, "%s of %s", origin, src);
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origin = new_origin;
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}
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if (strcmp(".", src))
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origin_data->is_local_branch = 0;
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string_list_append(&origins, origin)->util = origin_data;
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return 0;
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}
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static void print_joined(const char *singular, const char *plural,
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struct string_list *list, struct strbuf *out)
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{
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if (list->nr == 0)
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return;
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if (list->nr == 1) {
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strbuf_addf(out, "%s%s", singular, list->items[0].string);
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} else {
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int i;
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strbuf_addstr(out, plural);
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for (i = 0; i < list->nr - 1; i++)
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strbuf_addf(out, "%s%s", i > 0 ? ", " : "",
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list->items[i].string);
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strbuf_addf(out, " and %s", list->items[list->nr - 1].string);
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}
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}
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static void add_branch_desc(struct strbuf *out, const char *name)
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{
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struct strbuf desc = STRBUF_INIT;
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if (!read_branch_desc(&desc, name)) {
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const char *bp = desc.buf;
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while (*bp) {
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const char *ep = strchrnul(bp, '\n');
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if (*ep)
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ep++;
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strbuf_addf(out, " : %.*s", (int)(ep - bp), bp);
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bp = ep;
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}
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if (out->buf[out->len - 1] != '\n')
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strbuf_addch(out, '\n');
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}
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strbuf_release(&desc);
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}
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#define util_as_integral(elem) ((intptr_t)((elem)->util))
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static void record_person(int which, struct string_list *people,
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struct commit *commit)
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{
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char *name_buf, *name, *name_end;
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struct string_list_item *elem;
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const char *field = (which == 'a') ? "\nauthor " : "\ncommitter ";
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name = strstr(commit->buffer, field);
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if (!name)
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return;
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name += strlen(field);
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name_end = strchrnul(name, '<');
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if (*name_end)
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name_end--;
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while (isspace(*name_end) && name <= name_end)
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name_end--;
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if (name_end < name)
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return;
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name_buf = xmemdupz(name, name_end - name + 1);
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elem = string_list_lookup(people, name_buf);
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if (!elem) {
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elem = string_list_insert(people, name_buf);
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elem->util = (void *)0;
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}
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elem->util = (void*)(util_as_integral(elem) + 1);
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free(name_buf);
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}
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static int cmp_string_list_util_as_integral(const void *a_, const void *b_)
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{
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const struct string_list_item *a = a_, *b = b_;
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return util_as_integral(b) - util_as_integral(a);
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}
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static void add_people_count(struct strbuf *out, struct string_list *people)
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{
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if (people->nr == 1)
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strbuf_addf(out, "%s", people->items[0].string);
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else if (people->nr == 2)
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strbuf_addf(out, "%s (%d) and %s (%d)",
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people->items[0].string,
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(int)util_as_integral(&people->items[0]),
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people->items[1].string,
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(int)util_as_integral(&people->items[1]));
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else if (people->nr)
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strbuf_addf(out, "%s (%d) and others",
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people->items[0].string,
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(int)util_as_integral(&people->items[0]));
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}
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static void credit_people(struct strbuf *out,
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struct string_list *them,
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int kind)
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{
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const char *label;
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const char *me;
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if (kind == 'a') {
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label = "\n# By ";
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me = git_author_info(IDENT_NO_DATE);
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} else {
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label = "\n# Via ";
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me = git_committer_info(IDENT_NO_DATE);
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}
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if (!them->nr ||
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(them->nr == 1 &&
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me &&
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(me = skip_prefix(me, them->items->string)) != NULL &&
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skip_prefix(me, " <")))
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return;
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strbuf_addstr(out, label);
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add_people_count(out, them);
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}
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static void add_people_info(struct strbuf *out,
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struct string_list *authors,
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struct string_list *committers)
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{
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if (authors->nr)
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qsort(authors->items,
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authors->nr, sizeof(authors->items[0]),
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cmp_string_list_util_as_integral);
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if (committers->nr)
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qsort(committers->items,
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committers->nr, sizeof(committers->items[0]),
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cmp_string_list_util_as_integral);
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credit_people(out, authors, 'a');
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credit_people(out, committers, 'c');
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}
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static void shortlog(const char *name,
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struct origin_data *origin_data,
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struct commit *head,
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struct rev_info *rev, int limit,
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struct strbuf *out)
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{
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int i, count = 0;
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struct commit *commit;
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struct object *branch;
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struct string_list subjects = STRING_LIST_INIT_DUP;
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struct string_list authors = STRING_LIST_INIT_DUP;
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struct string_list committers = STRING_LIST_INIT_DUP;
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int flags = UNINTERESTING | TREESAME | SEEN | SHOWN | ADDED;
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struct strbuf sb = STRBUF_INIT;
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const unsigned char *sha1 = origin_data->sha1;
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branch = deref_tag(parse_object(sha1), sha1_to_hex(sha1), 40);
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if (!branch || branch->type != OBJ_COMMIT)
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return;
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setup_revisions(0, NULL, rev, NULL);
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add_pending_object(rev, branch, name);
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add_pending_object(rev, &head->object, "^HEAD");
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head->object.flags |= UNINTERESTING;
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if (prepare_revision_walk(rev))
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die("revision walk setup failed");
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while ((commit = get_revision(rev)) != NULL) {
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struct pretty_print_context ctx = {0};
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if (commit->parents && commit->parents->next) {
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/* do not list a merge but count committer */
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record_person('c', &committers, commit);
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continue;
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}
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if (!count)
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/* the 'tip' committer */
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record_person('c', &committers, commit);
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record_person('a', &authors, commit);
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count++;
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if (subjects.nr > limit)
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continue;
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format_commit_message(commit, "%s", &sb, &ctx);
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strbuf_ltrim(&sb);
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if (!sb.len)
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string_list_append(&subjects,
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sha1_to_hex(commit->object.sha1));
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else
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string_list_append(&subjects, strbuf_detach(&sb, NULL));
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}
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add_people_info(out, &authors, &committers);
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if (count > limit)
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strbuf_addf(out, "\n* %s: (%d commits)\n", name, count);
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else
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strbuf_addf(out, "\n* %s:\n", name);
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if (origin_data->is_local_branch && use_branch_desc)
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add_branch_desc(out, name);
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for (i = 0; i < subjects.nr; i++)
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if (i >= limit)
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strbuf_addf(out, " ...\n");
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else
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strbuf_addf(out, " %s\n", subjects.items[i].string);
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clear_commit_marks((struct commit *)branch, flags);
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clear_commit_marks(head, flags);
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free_commit_list(rev->commits);
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rev->commits = NULL;
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rev->pending.nr = 0;
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string_list_clear(&authors, 0);
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string_list_clear(&committers, 0);
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string_list_clear(&subjects, 0);
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}
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static void fmt_merge_msg_title(struct strbuf *out,
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const char *current_branch) {
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int i = 0;
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char *sep = "";
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strbuf_addstr(out, "Merge ");
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for (i = 0; i < srcs.nr; i++) {
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struct src_data *src_data = srcs.items[i].util;
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const char *subsep = "";
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strbuf_addstr(out, sep);
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sep = "; ";
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if (src_data->head_status == 1) {
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strbuf_addstr(out, srcs.items[i].string);
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continue;
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}
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if (src_data->head_status == 3) {
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subsep = ", ";
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strbuf_addstr(out, "HEAD");
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}
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if (src_data->branch.nr) {
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strbuf_addstr(out, subsep);
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subsep = ", ";
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print_joined("branch ", "branches ", &src_data->branch,
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out);
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}
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if (src_data->r_branch.nr) {
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strbuf_addstr(out, subsep);
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subsep = ", ";
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print_joined("remote-tracking branch ", "remote-tracking branches ",
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&src_data->r_branch, out);
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}
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if (src_data->tag.nr) {
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strbuf_addstr(out, subsep);
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subsep = ", ";
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print_joined("tag ", "tags ", &src_data->tag, out);
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}
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if (src_data->generic.nr) {
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strbuf_addstr(out, subsep);
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print_joined("commit ", "commits ", &src_data->generic,
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out);
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}
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if (strcmp(".", srcs.items[i].string))
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strbuf_addf(out, " of %s", srcs.items[i].string);
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}
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if (!strcmp("master", current_branch))
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strbuf_addch(out, '\n');
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else
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strbuf_addf(out, " into %s\n", current_branch);
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}
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static void fmt_tag_signature(struct strbuf *tagbuf,
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struct strbuf *sig,
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const char *buf,
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unsigned long len)
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{
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const char *tag_body = strstr(buf, "\n\n");
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if (tag_body) {
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tag_body += 2;
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strbuf_add(tagbuf, tag_body, buf + len - tag_body);
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}
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strbuf_complete_line(tagbuf);
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if (sig->len) {
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strbuf_addch(tagbuf, '\n');
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strbuf_add_lines(tagbuf, "# ", sig->buf, sig->len);
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}
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}
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static void fmt_merge_msg_sigs(struct strbuf *out)
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{
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int i, tag_number = 0, first_tag = 0;
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struct strbuf tagbuf = STRBUF_INIT;
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for (i = 0; i < origins.nr; i++) {
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unsigned char *sha1 = origins.items[i].util;
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enum object_type type;
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unsigned long size, len;
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char *buf = read_sha1_file(sha1, &type, &size);
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struct strbuf sig = STRBUF_INIT;
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if (!buf || type != OBJ_TAG)
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goto next;
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len = parse_signature(buf, size);
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if (size == len)
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; /* merely annotated */
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else if (verify_signed_buffer(buf, len, buf + len, size - len, &sig)) {
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if (!sig.len)
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strbuf_addstr(&sig, "gpg verification failed.\n");
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}
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if (!tag_number++) {
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fmt_tag_signature(&tagbuf, &sig, buf, len);
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first_tag = i;
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} else {
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if (tag_number == 2) {
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struct strbuf tagline = STRBUF_INIT;
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strbuf_addf(&tagline, "\n# %s\n",
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origins.items[first_tag].string);
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strbuf_insert(&tagbuf, 0, tagline.buf,
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tagline.len);
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|
strbuf_release(&tagline);
|
|
}
|
|
strbuf_addf(&tagbuf, "\n# %s\n",
|
|
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 (!prefixcmp(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->shortlog_len, 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",
|
|
"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;
|
|
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.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;
|
|
}
|