You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
117 lines
2.8 KiB
117 lines
2.8 KiB
#include "cache.h" |
|
#include "refs.h" |
|
#include "tag.h" |
|
#include "pack-refs.h" |
|
|
|
struct ref_to_prune { |
|
struct ref_to_prune *next; |
|
unsigned char sha1[20]; |
|
char name[FLEX_ARRAY]; |
|
}; |
|
|
|
struct pack_refs_cb_data { |
|
unsigned int flags; |
|
struct ref_to_prune *ref_to_prune; |
|
FILE *refs_file; |
|
}; |
|
|
|
static int do_not_prune(int flags) |
|
{ |
|
/* If it is already packed or if it is a symref, |
|
* do not prune it. |
|
*/ |
|
return (flags & (REF_ISSYMREF|REF_ISPACKED)); |
|
} |
|
|
|
static int handle_one_ref(const char *path, const unsigned char *sha1, |
|
int flags, void *cb_data) |
|
{ |
|
struct pack_refs_cb_data *cb = cb_data; |
|
int is_tag_ref; |
|
|
|
/* Do not pack the symbolic refs */ |
|
if ((flags & REF_ISSYMREF)) |
|
return 0; |
|
is_tag_ref = !prefixcmp(path, "refs/tags/"); |
|
|
|
/* ALWAYS pack refs that were already packed or are tags */ |
|
if (!(cb->flags & PACK_REFS_ALL) && !is_tag_ref && !(flags & REF_ISPACKED)) |
|
return 0; |
|
|
|
fprintf(cb->refs_file, "%s %s\n", sha1_to_hex(sha1), path); |
|
if (is_tag_ref) { |
|
struct object *o = parse_object(sha1); |
|
if (o->type == OBJ_TAG) { |
|
o = deref_tag(o, path, 0); |
|
if (o) |
|
fprintf(cb->refs_file, "^%s\n", |
|
sha1_to_hex(o->sha1)); |
|
} |
|
} |
|
|
|
if ((cb->flags & PACK_REFS_PRUNE) && !do_not_prune(flags)) { |
|
int namelen = strlen(path) + 1; |
|
struct ref_to_prune *n = xcalloc(1, sizeof(*n) + namelen); |
|
hashcpy(n->sha1, sha1); |
|
strcpy(n->name, path); |
|
n->next = cb->ref_to_prune; |
|
cb->ref_to_prune = n; |
|
} |
|
return 0; |
|
} |
|
|
|
/* make sure nobody touched the ref, and unlink */ |
|
static void prune_ref(struct ref_to_prune *r) |
|
{ |
|
struct ref_lock *lock = lock_ref_sha1(r->name + 5, r->sha1); |
|
|
|
if (lock) { |
|
unlink_or_warn(git_path("%s", r->name)); |
|
unlock_ref(lock); |
|
} |
|
} |
|
|
|
static void prune_refs(struct ref_to_prune *r) |
|
{ |
|
while (r) { |
|
prune_ref(r); |
|
r = r->next; |
|
} |
|
} |
|
|
|
static struct lock_file packed; |
|
|
|
int pack_refs(unsigned int flags) |
|
{ |
|
int fd; |
|
struct pack_refs_cb_data cbdata; |
|
|
|
memset(&cbdata, 0, sizeof(cbdata)); |
|
cbdata.flags = flags; |
|
|
|
fd = hold_lock_file_for_update(&packed, git_path("packed-refs"), |
|
LOCK_DIE_ON_ERROR); |
|
cbdata.refs_file = fdopen(fd, "w"); |
|
if (!cbdata.refs_file) |
|
die_errno("unable to create ref-pack file structure"); |
|
|
|
/* perhaps other traits later as well */ |
|
fprintf(cbdata.refs_file, "# pack-refs with: peeled \n"); |
|
|
|
for_each_ref(handle_one_ref, &cbdata); |
|
if (ferror(cbdata.refs_file)) |
|
die("failed to write ref-pack file"); |
|
if (fflush(cbdata.refs_file) || fsync(fd) || fclose(cbdata.refs_file)) |
|
die_errno("failed to write ref-pack file"); |
|
/* |
|
* Since the lock file was fdopen()'ed and then fclose()'ed above, |
|
* assign -1 to the lock file descriptor so that commit_lock_file() |
|
* won't try to close() it. |
|
*/ |
|
packed.fd = -1; |
|
if (commit_lock_file(&packed) < 0) |
|
die_errno("unable to overwrite old ref-pack file"); |
|
if (cbdata.flags & PACK_REFS_PRUNE) |
|
prune_refs(cbdata.ref_to_prune); |
|
return 0; |
|
}
|
|
|