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#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;
}
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