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git/name-rev.c
Junio C Hamano 84a9b58c42 sha1_name: warning ambiguous refs.
This makes sure that many commands that take refs on the command
line to honor core.warnambiguousrefs configuration.  Earlier,
the commands affected by this patch did not read the
configuration file.

Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-03-23 23:41:18 -08:00

246 lines
5.3 KiB
C

#include <stdlib.h>
#include "cache.h"
#include "commit.h"
#include "tag.h"
#include "refs.h"
static const char name_rev_usage[] =
"git-name-rev [--tags] ( --all | --stdin | commitish [commitish...] )\n";
typedef struct rev_name {
const char *tip_name;
int merge_traversals;
int generation;
} rev_name;
static long cutoff = LONG_MAX;
static void name_rev(struct commit *commit,
const char *tip_name, int merge_traversals, int generation,
int deref)
{
struct rev_name *name = (struct rev_name *)commit->object.util;
struct commit_list *parents;
int parent_number = 1;
if (!commit->object.parsed)
parse_commit(commit);
if (commit->date < cutoff)
return;
if (deref) {
char *new_name = xmalloc(strlen(tip_name)+3);
strcpy(new_name, tip_name);
strcat(new_name, "^0");
tip_name = new_name;
if (generation)
die("generation: %d, but deref?", generation);
}
if (name == NULL) {
name = xmalloc(sizeof(rev_name));
commit->object.util = name;
goto copy_data;
} else if (name->merge_traversals > merge_traversals ||
(name->merge_traversals == merge_traversals &&
name->generation > generation)) {
copy_data:
name->tip_name = tip_name;
name->merge_traversals = merge_traversals;
name->generation = generation;
} else
return;
for (parents = commit->parents;
parents;
parents = parents->next, parent_number++) {
if (parent_number > 1) {
char *new_name = xmalloc(strlen(tip_name)+8);
if (generation > 0)
sprintf(new_name, "%s~%d^%d", tip_name,
generation, parent_number);
else
sprintf(new_name, "%s^%d", tip_name, parent_number);
name_rev(parents->item, new_name,
merge_traversals + 1 , 0, 0);
} else {
name_rev(parents->item, tip_name, merge_traversals,
generation + 1, 0);
}
}
}
static int tags_only = 0;
static int name_ref(const char *path, const unsigned char *sha1)
{
struct object *o = parse_object(sha1);
int deref = 0;
if (tags_only && strncmp(path, "refs/tags/", 10))
return 0;
while (o && o->type == tag_type) {
struct tag *t = (struct tag *) o;
if (!t->tagged)
break; /* broken repository */
o = parse_object(t->tagged->sha1);
deref = 1;
}
if (o && o->type == commit_type) {
struct commit *commit = (struct commit *)o;
if (!strncmp(path, "refs/heads/", 11))
path = path + 11;
else if (!strncmp(path, "refs/", 5))
path = path + 5;
name_rev(commit, strdup(path), 0, 0, deref);
}
return 0;
}
/* returns a static buffer */
static const char* get_rev_name(struct object *o)
{
static char buffer[1024];
struct rev_name *n = (struct rev_name *)o->util;
if (!n)
return "undefined";
if (!n->generation)
return n->tip_name;
snprintf(buffer, sizeof(buffer), "%s~%d", n->tip_name, n->generation);
return buffer;
}
int main(int argc, char **argv)
{
struct object_list *revs = NULL;
struct object_list **walker = &revs;
int as_is = 0, all = 0, transform_stdin = 0;
setup_git_directory();
git_config(git_default_config);
if (argc < 2)
usage(name_rev_usage);
for (--argc, ++argv; argc; --argc, ++argv) {
unsigned char sha1[20];
struct object *o;
struct commit *commit;
if (!as_is && (*argv)[0] == '-') {
if (!strcmp(*argv, "--")) {
as_is = 1;
continue;
} else if (!strcmp(*argv, "--tags")) {
tags_only = 1;
continue;
} else if (!strcmp(*argv, "--all")) {
if (argc > 1)
die("Specify either a list, or --all, not both!");
all = 1;
cutoff = 0;
continue;
} else if (!strcmp(*argv, "--stdin")) {
if (argc > 1)
die("Specify either a list, or --stdin, not both!");
transform_stdin = 1;
cutoff = 0;
continue;
}
usage(name_rev_usage);
}
if (get_sha1(*argv, sha1)) {
fprintf(stderr, "Could not get sha1 for %s. Skipping.\n",
*argv);
continue;
}
o = deref_tag(parse_object(sha1), *argv, 0);
if (!o || o->type != commit_type) {
fprintf(stderr, "Could not get commit for %s. Skipping.\n",
*argv);
continue;
}
commit = (struct commit *)o;
if (cutoff > commit->date)
cutoff = commit->date;
object_list_append((struct object *)commit, walker);
(*walker)->name = *argv;
walker = &((*walker)->next);
}
for_each_ref(name_ref);
if (transform_stdin) {
char buffer[2048];
char *p, *p_start;
while (!feof(stdin)) {
int forty = 0;
p = fgets(buffer, sizeof(buffer), stdin);
if (!p)
break;
for (p_start = p; *p; p++) {
#define ishex(x) (isdigit((x)) || ((x) >= 'a' && (x) <= 'f'))
if (!ishex(*p))
forty = 0;
else if (++forty == 40 &&
!ishex(*(p+1))) {
unsigned char sha1[40];
const char *name = "undefined";
char c = *(p+1);
forty = 0;
*(p+1) = 0;
if (!get_sha1(p - 39, sha1)) {
struct object *o =
lookup_object(sha1);
if (o)
name = get_rev_name(o);
}
*(p+1) = c;
if (!strcmp(name, "undefined"))
continue;
fwrite(p_start, p - p_start + 1, 1,
stdout);
printf(" (%s)", name);
p_start = p + 1;
}
}
/* flush */
if (p_start != p)
fwrite(p_start, p - p_start, 1, stdout);
}
} else if (all) {
int i;
for (i = 0; i < obj_allocs; i++)
if (objs[i])
printf("%s %s\n", sha1_to_hex(objs[i]->sha1),
get_rev_name(objs[i]));
} else
for ( ; revs; revs = revs->next)
printf("%s %s\n", revs->name, get_rev_name(revs->item));
return 0;
}