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#include "builtin.h"
#include "cache.h"
#include "commit.h"
#include "diff.h"
#include "revision.h"
#include "tag.h"
static const char * const fmt_merge_msg_usage[] = {
"git fmt-merge-msg [--log|--no-log] [--file <file>]",
NULL
};
static int merge_summary;
static int fmt_merge_msg_config(const char *key, const char *value, void *cb)
{
static int found_merge_log = 0;
if (!strcmp("merge.log", key)) {
found_merge_log = 1;
merge_summary = git_config_bool(key, value);
}
if (!found_merge_log && !strcmp("merge.summary", key))
merge_summary = git_config_bool(key, value);
return 0;
}
struct list {
char **list;
void **payload;
unsigned nr, alloc;
};
static void append_to_list(struct list *list, char *value, void *payload)
{
if (list->nr == list->alloc) {
list->alloc += 32;
list->list = xrealloc(list->list, sizeof(char *) * list->alloc);
list->payload = xrealloc(list->payload,
sizeof(char *) * list->alloc);
}
list->payload[list->nr] = payload;
list->list[list->nr++] = value;
}
static int find_in_list(struct list *list, char *value)
{
int i;
for (i = 0; i < list->nr; i++)
if (!strcmp(list->list[i], value))
return i;
return -1;
}
static void free_list(struct list *list)
{
int i;
if (list->alloc == 0)
return;
for (i = 0; i < list->nr; i++) {
free(list->list[i]);
free(list->payload[i]);
}
free(list->list);
free(list->payload);
list->nr = list->alloc = 0;
}
struct src_data {
struct list branch, tag, r_branch, generic;
int head_status;
};
static struct list srcs = { NULL, NULL, 0, 0};
static struct list origins = { NULL, NULL, 0, 0};
static int handle_line(char *line)
{
int i, len = strlen(line);
unsigned char *sha1;
char *src, *origin;
struct src_data *src_data;
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;
}
i = find_in_list(&srcs, src);
if (i < 0) {
i = srcs.nr;
append_to_list(&srcs, xstrdup(src),
xcalloc(1, sizeof(struct src_data)));
}
src_data = srcs.payload[i];
if (pulling_head) {
origin = xstrdup(src);
src_data->head_status |= 1;
} else if (!prefixcmp(line, "branch ")) {
origin = xstrdup(line + 7);
append_to_list(&src_data->branch, origin, NULL);
src_data->head_status |= 2;
} else if (!prefixcmp(line, "tag ")) {
origin = line;
append_to_list(&src_data->tag, xstrdup(origin + 4), NULL);
src_data->head_status |= 2;
} else if (!prefixcmp(line, "remote branch ")) {
origin = xstrdup(line + 14);
append_to_list(&src_data->r_branch, origin, NULL);
src_data->head_status |= 2;
} else {
origin = xstrdup(src);
append_to_list(&src_data->generic, xstrdup(line), NULL);
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 = xstrdup(origin);
}
} else {
char *new_origin = xmalloc(strlen(origin) + strlen(src) + 5);
sprintf(new_origin, "%s of %s", origin, src);
origin = new_origin;
}
append_to_list(&origins, origin, sha1);
return 0;
}
static void print_joined(const char *singular, const char *plural,
struct list *list, struct strbuf *out)
{
if (list->nr == 0)
return;
if (list->nr == 1) {
strbuf_addf(out, "%s%s", singular, list->list[0]);
} else {
int i;
strbuf_addstr(out, plural);
for (i = 0; i < list->nr - 1; i++)
strbuf_addf(out, "%s%s", i > 0 ? ", " : "", list->list[i]);
strbuf_addf(out, " and %s", list->list[list->nr - 1]);
}
}
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 list subjects = { NULL, NULL, 0, 0 };
int flags = UNINTERESTING | TREESAME | SEEN | SHOWN | ADDED;
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) {
char *oneline, *bol, *eol;
/* ignore merges */
if (commit->parents && commit->parents->next)
continue;
count++;
if (subjects.nr > limit)
continue;
bol = strstr(commit->buffer, "\n\n");
if (bol) {
unsigned char c;
do {
c = *++bol;
} while (isspace(c));
if (!c)
bol = NULL;
}
if (!bol) {
append_to_list(&subjects, xstrdup(sha1_to_hex(
commit->object.sha1)),
NULL);
continue;
}
eol = strchr(bol, '\n');
if (eol) {
oneline = xmemdupz(bol, eol - bol);
} else {
oneline = xstrdup(bol);
}
append_to_list(&subjects, oneline, 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.list[i]);
clear_commit_marks((struct commit *)branch, flags);
clear_commit_marks(head, flags);
free_commit_list(rev->commits);
rev->commits = NULL;
rev->pending.nr = 0;
free_list(&subjects);
}
int fmt_merge_msg(int merge_summary, struct strbuf *in, struct strbuf *out) {
int limit = 20, i = 0, pos = 0;
char *sep = "";
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);
}
strbuf_addstr(out, "Merge ");
for (i = 0; i < srcs.nr; i++) {
struct src_data *src_data = srcs.payload[i];
const char *subsep = "";
strbuf_addstr(out, sep);
sep = "; ";
if (src_data->head_status == 1) {
strbuf_addstr(out, srcs.list[i]);
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 branch ", "remote 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.list[i]))
strbuf_addf(out, " of %s", srcs.list[i]);
}
if (!strcmp("master", current_branch))
strbuf_addch(out, '\n');
else
strbuf_addf(out, " into %s\n", current_branch);
if (merge_summary) {
struct commit *head;
struct rev_info rev;
head = lookup_commit(head_sha1);
init_revisions(&rev, NULL);
rev.commit_format = CMIT_FMT_ONELINE;
rev.ignore_merges = 1;
rev.limited = 1;
for (i = 0; i < origins.nr; i++)
shortlog(origins.list[i], origins.payload[i],
head, &rev, limit, out);
}
return 0;
}
int cmd_fmt_merge_msg(int argc, const char **argv, const char *prefix)
{
const char *inpath = NULL;
struct option options[] = {
OPT_BOOLEAN(0, "log", &merge_summary, "populate log with the shortlog"),
OPT_BOOLEAN(0, "summary", &merge_summary, "alias for --log"),
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 (inpath && strcmp(inpath, "-")) {
in = fopen(inpath, "r");
if (!in)
die("cannot open %s", inpath);
}
if (strbuf_read(&input, fileno(in), 0) < 0)
die_errno("could not read input file");
ret = fmt_merge_msg(merge_summary, &input, &output);
if (ret)
return ret;
write_in_full(STDOUT_FILENO, output.buf, output.len);
return 0;
}
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