mirror of
https://github.com/git/git.git
synced 2024-10-30 05:47:53 +01:00
4c72ee838f
* mk/upload-pack-off-by-one-dead-code-removal: upload-pack: remove a piece of dead code
143 lines
3.4 KiB
C
143 lines
3.4 KiB
C
#include "cache.h"
|
|
#include "commit.h"
|
|
#include "tag.h"
|
|
|
|
static int is_shallow = -1;
|
|
static struct stat shallow_stat;
|
|
static char *alternate_shallow_file;
|
|
|
|
void set_alternate_shallow_file(const char *path)
|
|
{
|
|
if (is_shallow != -1)
|
|
die("BUG: is_repository_shallow must not be called before set_alternate_shallow_file");
|
|
free(alternate_shallow_file);
|
|
alternate_shallow_file = path ? xstrdup(path) : NULL;
|
|
}
|
|
|
|
int register_shallow(const unsigned char *sha1)
|
|
{
|
|
struct commit_graft *graft =
|
|
xmalloc(sizeof(struct commit_graft));
|
|
struct commit *commit = lookup_commit(sha1);
|
|
|
|
hashcpy(graft->sha1, sha1);
|
|
graft->nr_parent = -1;
|
|
if (commit && commit->object.parsed)
|
|
commit->parents = NULL;
|
|
return register_commit_graft(graft, 0);
|
|
}
|
|
|
|
int is_repository_shallow(void)
|
|
{
|
|
FILE *fp;
|
|
char buf[1024];
|
|
const char *path = alternate_shallow_file;
|
|
|
|
if (is_shallow >= 0)
|
|
return is_shallow;
|
|
|
|
if (!path)
|
|
path = git_path("shallow");
|
|
/*
|
|
* fetch-pack sets '--shallow-file ""' as an indicator that no
|
|
* shallow file should be used. We could just open it and it
|
|
* will likely fail. But let's do an explicit check instead.
|
|
*/
|
|
if (!*path ||
|
|
stat(path, &shallow_stat) ||
|
|
(fp = fopen(path, "r")) == NULL) {
|
|
is_shallow = 0;
|
|
return is_shallow;
|
|
}
|
|
is_shallow = 1;
|
|
|
|
while (fgets(buf, sizeof(buf), fp)) {
|
|
unsigned char sha1[20];
|
|
if (get_sha1_hex(buf, sha1))
|
|
die("bad shallow line: %s", buf);
|
|
register_shallow(sha1);
|
|
}
|
|
fclose(fp);
|
|
return is_shallow;
|
|
}
|
|
|
|
struct commit_list *get_shallow_commits(struct object_array *heads, int depth,
|
|
int shallow_flag, int not_shallow_flag)
|
|
{
|
|
int i = 0, cur_depth = 0;
|
|
struct commit_list *result = NULL;
|
|
struct object_array stack = OBJECT_ARRAY_INIT;
|
|
struct commit *commit = NULL;
|
|
|
|
while (commit || i < heads->nr || stack.nr) {
|
|
struct commit_list *p;
|
|
if (!commit) {
|
|
if (i < heads->nr) {
|
|
commit = (struct commit *)
|
|
deref_tag(heads->objects[i++].item, NULL, 0);
|
|
if (!commit || commit->object.type != OBJ_COMMIT) {
|
|
commit = NULL;
|
|
continue;
|
|
}
|
|
if (!commit->util)
|
|
commit->util = xmalloc(sizeof(int));
|
|
*(int *)commit->util = 0;
|
|
cur_depth = 0;
|
|
} else {
|
|
commit = (struct commit *)
|
|
stack.objects[--stack.nr].item;
|
|
cur_depth = *(int *)commit->util;
|
|
}
|
|
}
|
|
if (parse_commit(commit))
|
|
die("invalid commit");
|
|
cur_depth++;
|
|
if (cur_depth >= depth) {
|
|
commit_list_insert(commit, &result);
|
|
commit->object.flags |= shallow_flag;
|
|
commit = NULL;
|
|
continue;
|
|
}
|
|
commit->object.flags |= not_shallow_flag;
|
|
for (p = commit->parents, commit = NULL; p; p = p->next) {
|
|
if (!p->item->util) {
|
|
int *pointer = xmalloc(sizeof(int));
|
|
p->item->util = pointer;
|
|
*pointer = cur_depth;
|
|
} else {
|
|
int *pointer = p->item->util;
|
|
if (cur_depth >= *pointer)
|
|
continue;
|
|
*pointer = cur_depth;
|
|
}
|
|
if (p->next)
|
|
add_object_array(&p->item->object,
|
|
NULL, &stack);
|
|
else {
|
|
commit = p->item;
|
|
cur_depth = *(int *)commit->util;
|
|
}
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
void check_shallow_file_for_update(void)
|
|
{
|
|
struct stat st;
|
|
|
|
if (!is_shallow)
|
|
return;
|
|
else if (is_shallow == -1)
|
|
die("BUG: shallow must be initialized by now");
|
|
|
|
if (stat(git_path("shallow"), &st))
|
|
die("shallow file was removed during fetch");
|
|
else if (st.st_mtime != shallow_stat.st_mtime
|
|
#ifdef USE_NSEC
|
|
|| ST_MTIME_NSEC(st) != ST_MTIME_NSEC(shallow_stat)
|
|
#endif
|
|
)
|
|
die("shallow file was changed during fetch");
|
|
}
|