/*
* Copyright (C) the libgit2 contributors. All rights reserved.
*
* This file is part of libgit2, distributed under the GNU GPL v2 with
* a Linking Exception. For full terms see the included COPYING file.
*/
#include "refs.h"
#include "hash.h"
#include "repository.h"
#include "fileops.h"
#include "pack.h"
#include "reflog.h"
#include "refdb.h"
#include "refdb_fs.h"
#include <git2/tag.h>
#include <git2/object.h>
#include <git2/refdb.h>
#include <git2/sys/refdb_backend.h>
#include <git2/sys/refs.h>
GIT__USE_STRMAP;
#define DEFAULT_NESTING_LEVEL 5
#define MAX_NESTING_LEVEL 10
enum {
GIT_PACKREF_HAS_PEEL = 1,
GIT_PACKREF_WAS_LOOSE = 2
};
struct packref {
git_oid oid;
git_oid peel;
char flags;
char name[GIT_FLEX_ARRAY];
};
typedef struct refdb_fs_backend {
git_refdb_backend parent;
git_repository *repo;
const char *path;
git_refcache refcache;
} refdb_fs_backend;
static int reference_read(
git_buf *file_content,
time_t *mtime,
const char *repo_path,
const char *ref_name,
int *updated)
{
git_buf path = GIT_BUF_INIT;
int result;
assert(file_content && repo_path && ref_name);
/* Determine the full path of the file */
if (git_buf_joinpath(&path, repo_path, ref_name) < 0)
return -1;
result = git_futils_readbuffer_updated(file_content, path.ptr, mtime, NULL, updated);
git_buf_free(&path);
return result;
}
static int packed_parse_oid(
struct packref **ref_out,
const char **buffer_out,
const char *buffer_end)
{
struct packref *ref = NULL;
const char *buffer = *buffer_out;
const char *refname_begin, *refname_end;
size_t refname_len;
git_oid id;
refname_begin = (buffer + GIT_OID_HEXSZ + 1);
if (refname_begin >= buffer_end || refname_begin[-1] != ' ')
goto corrupt;
/* Is this a valid object id? */
if (git_oid_fromstr(&id, buffer) < 0)
goto corrupt;
refname_end = memchr(refname_begin, '\n', buffer_end - refname_begin);
if (refname_end == NULL)
refname_end = buffer_end;
if (refname_end[-1] == '\r')
refname_end--;
refname_len = refname_end - refname_begin;
ref = git__malloc(sizeof(struct packref) + refname_len + 1);
GITERR_CHECK_ALLOC(ref);
memcpy(ref->name, refname_begin, refname_len);
ref->name[refname_len] = 0;
git_oid_cpy(&ref->oid, &id);
ref->flags = 0;
*ref_out = ref;
*buffer_out = refname_end + 1;
return 0;
corrupt:
git__free(ref);
giterr_set(GITERR_REFERENCE, "The packed references file is corrupted");
return -1;
}
static int packed_parse_peel(
struct packref *tag_ref,
const char **buffer_out,
const char *buffer_end)
{
const char *buffer = *buffer_out + 1;
assert(buffer[-1] == '^');
/* Ensure it's not the first entry of the file */
if (tag_ref == NULL)
goto corrupt;
/* Ensure reference is a tag */
if (git__prefixcmp(tag_ref->name, GIT_REFS_TAGS_DIR) != 0)
goto corrupt;
if (buffer + GIT_OID_HEXSZ > buffer_end)
goto corrupt;
/* Is this a valid object id? */
if (git_oid_fromstr(&tag_ref->peel, buffer) < 0)
goto corrupt;
buffer = buffer + GIT_OID_HEXSZ;
if (*buffer == '\r')
buffer++;
if (buffer != buffer_end) {
if (*buffer == '\n')
buffer++;
else
goto corrupt;
}
*buffer_out = buffer;
return 0;
corrupt:
giterr_set(GITERR_REFERENCE, "The packed references file is corrupted");
return -1;
}
static int packed_load(refdb_fs_backend *backend)
{
int result, updated;
git_buf packfile = GIT_BUF_INIT;
const char *buffer_start, *buffer_end;
git_refcache *ref_cache = &backend->refcache;
/* First we make sure we have allocated the hash table */
if (ref_cache->packfile == NULL) {
ref_cache->packfile = git_strmap_alloc();
GITERR_CHECK_ALLOC(ref_cache->packfile);
}
result = reference_read(&packfile, &ref_cache->packfile_time,
backend->path, GIT_PACKEDREFS_FILE, &updated);
/*
* If we couldn't find the file, we need to clear the table and
* return. On any other error, we return that error. If everything
* went fine and the file wasn't updated, then there's nothing new
* for us here, so just return. Anything else means we need to
* refresh the packed refs.
*/
if (result == GIT_ENOTFOUND) {
git_strmap_clear(ref_cache->packfile);
return 0;
}
if (result < 0)
return -1;
if (!updated)
return 0;
/*
* At this point, we want to refresh the packed refs. We already
* have the contents in our buffer.
*/
git_strmap_clear(ref_cache->packfile);
buffer_start = (const char *)packfile.ptr;
buffer_end = (const char *)(buffer_start) + packfile.size;
while (buffer_start < buffer_end && buffer_start[0] == '#') {
buffer_start = strchr(buffer_start, '\n');
if (buffer_start == NULL)
goto parse_failed;
buffer_start++;
}
while (buffer_start < buffer_end) {
int err;
struct packref *ref = NULL;
if (packed_parse_oid(&ref, &buffer_start, buffer_end) < 0)
goto parse_failed;
if (buffer_start[0] == '^') {
if (packed_parse_peel(ref, &buffer_start, buffer_end) < 0)
goto parse_failed;
}
git_strmap_insert(ref_cache->packfile, ref->name, ref, err);
if (err < 0)
goto parse_failed;
}
git_buf_free(&packfile);
return 0;
parse_failed:
git_strmap_free(ref_cache->packfile);
ref_cache->packfile = NULL;
git_buf_free(&packfile);
return -1;
}
static int loose_parse_oid(git_oid *oid, const char *filename, git_buf *file_content)
{
size_t len;
const char *str;
len = git_buf_len(file_content);
if (len < GIT_OID_HEXSZ)
goto corrupted;
/* str is guranteed to be zero-terminated */
str = git_buf_cstr(file_content);
/* we need to get 40 OID characters from the file */
if (git_oid_fromstr(oid, git_buf_cstr(file_content)) < 0)
goto corrupted;
/* If the file is longer than 40 chars, the 41st must be a space */
str += GIT_OID_HEXSZ;
if (*str == '\0' || git__isspace(*str))
return 0;
corrupted:
giterr_set(GITERR_REFERENCE, "Corrupted loose reference file: %s", filename);
return -1;
}
static int loose_lookup_to_packfile(
struct packref **ref_out,
refdb_fs_backend *backend,
const char *name)
{
git_buf ref_file = GIT_BUF_INIT;
struct packref *ref = NULL;
size_t name_len;
*ref_out = NULL;
if (reference_read(&ref_file, NULL, backend->path, name, NULL) < 0)
return -1;
git_buf_rtrim(&ref_file);
name_len = strlen(name);
ref = git__malloc(sizeof(struct packref) + name_len + 1);
GITERR_CHECK_ALLOC(ref);
memcpy(ref->name, name, name_len);
ref->name[name_len] = 0;
if (loose_parse_oid(&ref->oid, name, &ref_file) < 0) {
git_buf_free(&ref_file);
git__free(ref);
return -1;
}
ref->flags = GIT_PACKREF_WAS_LOOSE;
*ref_out = ref;
git_buf_free(&ref_file);
return 0;
}
static int _dirent_loose_load(void *data, git_buf *full_path)
{
refdb_fs_backend *backend = (refdb_fs_backend *)data;
void *old_ref = NULL;
struct packref *ref;
const char *file_path;
int err;
if (git_path_isdir(full_path->ptr) == true)
return git_path_direach(full_path, _dirent_loose_load, backend);
file_path = full_path->ptr + strlen(backend->path);
if (loose_lookup_to_packfile(&ref, backend, file_path) < 0)
return -1;
git_strmap_insert2(
backend->refcache.packfile, ref->name, ref, old_ref, err);
if (err < 0) {
git__free(ref);
return -1;
}
git__free(old_ref);
return 0;
}
/*
* Load all the loose references from the repository
* into the in-memory Packfile, and build a vector with
* all the references so it can be written back to
* disk.
*/
static int packed_loadloose(refdb_fs_backend *backend)
{
git_buf refs_path = GIT_BUF_INIT;
int result;
/* the packfile must have been previously loaded! */
assert(backend->refcache.packfile);
if (git_buf_joinpath(&refs_path, backend->path, GIT_REFS_DIR) < 0)
return -1;
/*
* Load all the loose files from disk into the Packfile table.
* This will overwrite any old packed entries with their
* updated loose versions
*/
result = git_path_direach(&refs_path, _dirent_loose_load, backend);
git_buf_free(&refs_path);
return result;
}
static int refdb_fs_backend__exists(
int *exists,
git_refdb_backend *_backend,
const char *ref_name)
{
refdb_fs_backend *backend;
git_buf ref_path = GIT_BUF_INIT;
assert(_backend);
backend = (refdb_fs_backend *)_backend;
if (packed_load(backend) < 0)
return -1;
if (git_buf_joinpath(&ref_path, backend->path, ref_name) < 0)
return -1;
if (git_path_isfile(ref_path.ptr) == true ||
git_strmap_exists(backend->refcache.packfile, ref_path.ptr))
*exists = 1;
else
*exists = 0;
git_buf_free(&ref_path);
return 0;
}
static const char *loose_parse_symbolic(git_buf *file_content)
{
const unsigned int header_len = (unsigned int)strlen(GIT_SYMREF);
const char *refname_start;
refname_start = (const char *)file_content->ptr;
if (git_buf_len(file_content) < header_len + 1) {
giterr_set(GITERR_REFERENCE, "Corrupted loose reference file");
return NULL;
}
/*
* Assume we have already checked for the header
* before calling this function
*/
refname_start += header_len;
return refname_start;
}
static int loose_lookup(
git_reference **out,
refdb_fs_backend *backend,
const char *ref_name)
{
const char *target;
git_oid oid;
git_buf ref_file = GIT_BUF_INIT;
int error = 0;
error = reference_read(&ref_file, NULL, backend->path, ref_name, NULL);
if (error < 0)
goto done;
if (git__prefixcmp((const char *)(ref_file.ptr), GIT_SYMREF) == 0) {
git_buf_rtrim(&ref_file);
if ((target = loose_parse_symbolic(&ref_file)) == NULL) {
error = -1;
goto done;
}
*out = git_reference__alloc_symbolic(ref_name, target);
} else {
if ((error = loose_parse_oid(&oid, ref_name, &ref_file)) < 0)
goto done;
*out = git_reference__alloc(ref_name, &oid, NULL);
}
if (*out == NULL)
error = -1;
done:
git_buf_free(&ref_file);
return error;
}
static int packed_map_entry(
struct packref **entry,
khiter_t *pos,
refdb_fs_backend *backend,
const char *ref_name)
{
git_strmap *packfile_refs;
if (packed_load(backend) < 0)
return -1;
/* Look up on the packfile */
packfile_refs = backend->refcache.packfile;
*pos = git_strmap_lookup_index(packfile_refs, ref_name);
if (!git_strmap_valid_index(packfile_refs, *pos)) {
giterr_set(GITERR_REFERENCE, "Reference '%s' not found", ref_name);
return GIT_ENOTFOUND;
}
*entry = git_strmap_value_at(packfile_refs, *pos);
return 0;
}
static int packed_lookup(
git_reference **out,
refdb_fs_backend *backend,
const char *ref_name)
{
struct packref *entry;
khiter_t pos;
int error = 0;
if ((error = packed_map_entry(&entry, &pos, backend, ref_name)) < 0)
return error;
if ((*out = git_reference__alloc(ref_name,
&entry->oid, &entry->peel)) == NULL)
return -1;
return 0;
}
static int refdb_fs_backend__lookup(
git_reference **out,
git_refdb_backend *_backend,
const char *ref_name)
{
refdb_fs_backend *backend;
int result;
assert(_backend);
backend = (refdb_fs_backend *)_backend;
if ((result = loose_lookup(out, backend, ref_name)) == 0)
return 0;
/* only try to lookup this reference on the packfile if it
* wasn't found on the loose refs; not if there was a critical error */
if (result == GIT_ENOTFOUND) {
giterr_clear();
result = packed_lookup(out, backend, ref_name);
}
return result;
}
struct dirent_list_data {
refdb_fs_backend *backend;
size_t repo_path_len;
unsigned int list_type:2;
git_reference_foreach_cb callback;
void *callback_payload;
int callback_error;
};
static git_ref_t loose_guess_rtype(const git_buf *full_path)
{
git_buf ref_file = GIT_BUF_INIT;
git_ref_t type;
type = GIT_REF_INVALID;
if (git_futils_readbuffer(&ref_file, full_path->ptr) == 0) {
if (git__prefixcmp((const char *)(ref_file.ptr), GIT_SYMREF) == 0)
type = GIT_REF_SYMBOLIC;
else
type = GIT_REF_OID;
}
git_buf_free(&ref_file);
return type;
}
static int _dirent_loose_listall(void *_data, git_buf *full_path)
{
struct dirent_list_data *data = (struct dirent_list_data *)_data;
const char *file_path = full_path->ptr + data->repo_path_len;
if (git_path_isdir(full_path->ptr) == true)
return git_path_direach(full_path, _dirent_loose_listall, _data);
/* do not add twice a reference that exists already in the packfile */
if (git_strmap_exists(data->backend->refcache.packfile, file_path))
return 0;
if (data->list_type != GIT_REF_LISTALL) {
if ((data->list_type & loose_guess_rtype(full_path)) == 0)
return 0; /* we are filtering out this reference */
}
/* Locked references aren't returned */
if (!git__suffixcmp(file_path, GIT_FILELOCK_EXTENSION))
return 0;
if (data->callback(file_path, data->callback_payload))
data->callback_error = GIT_EUSER;
return data->callback_error;
}
static int refdb_fs_backend__foreach(
git_refdb_backend *_backend,
unsigned int list_type,
git_reference_foreach_cb callback,
void *payload)
{
refdb_fs_backend *backend;
int result;
struct dirent_list_data data;
git_buf refs_path = GIT_BUF_INIT;
const char *ref_name;
void *ref = NULL;
GIT_UNUSED(ref);
assert(_backend);
backend = (refdb_fs_backend *)_backend;
if (packed_load(backend) < 0)
return -1;
/* list all the packed references first */
if (list_type & GIT_REF_OID) {
git_strmap_foreach(backend->refcache.packfile, ref_name, ref, {
if (callback(ref_name, payload))
return GIT_EUSER;
});
}
/* now list the loose references, trying not to
* duplicate the ref names already in the packed-refs file */
data.repo_path_len = strlen(backend->path);
data.list_type = list_type;
data.backend = backend;
data.callback = callback;
data.callback_payload = payload;
data.callback_error = 0;
if (git_buf_joinpath(&refs_path, backend->path, GIT_REFS_DIR) < 0)
return -1;
result = git_path_direach(&refs_path, _dirent_loose_listall, &data);
git_buf_free(&refs_path);
return data.callback_error ? GIT_EUSER : result;
}
static int loose_write(refdb_fs_backend *backend, const git_reference *ref)
{
git_filebuf file = GIT_FILEBUF_INIT;
git_buf ref_path = GIT_BUF_INIT;
/* Remove a possibly existing empty directory hierarchy
* which name would collide with the reference name
*/
if (git_futils_rmdir_r(ref->name, backend->path,
GIT_RMDIR_SKIP_NONEMPTY) < 0)
return -1;
if (git_buf_joinpath(&ref_path, backend->path, ref->name) < 0)
return -1;
if (git_filebuf_open(&file, ref_path.ptr, GIT_FILEBUF_FORCE) < 0) {
git_buf_free(&ref_path);
return -1;
}
git_buf_free(&ref_path);
if (ref->type == GIT_REF_OID) {
char oid[GIT_OID_HEXSZ + 1];
git_oid_fmt(oid, &ref->target.oid);
oid[GIT_OID_HEXSZ] = '\0';
git_filebuf_printf(&file, "%s\n", oid);
} else if (ref->type == GIT_REF_SYMBOLIC) {
git_filebuf_printf(&file, GIT_SYMREF "%s\n", ref->target.symbolic);
} else {
assert(0); /* don't let this happen */
}
return git_filebuf_commit(&file, GIT_REFS_FILE_MODE);
}
static int packed_sort(const void *a, const void *b)
{
const struct packref *ref_a = (const struct packref *)a;
const struct packref *ref_b = (const struct packref *)b;
return strcmp(ref_a->name, ref_b->name);
}
/*
* Find out what object this reference resolves to.
*
* For references that point to a 'big' tag (e.g. an
* actual tag object on the repository), we need to
* cache on the packfile the OID of the object to
* which that 'big tag' is pointing to.
*/
static int packed_find_peel(refdb_fs_backend *backend, struct packref *ref)
{
git_object *object;
if (ref->flags & GIT_PACKREF_HAS_PEEL)
return 0;
/*
* Only applies to tags, i.e. references
* in the /refs/tags folder
*/
if (git__prefixcmp(ref->name, GIT_REFS_TAGS_DIR) != 0)
return 0;
/*
* Find the tagged object in the repository
*/
if (git_object_lookup(&object, backend->repo, &ref->oid, GIT_OBJ_ANY) < 0)
return -1;
/*
* If the tagged object is a Tag object, we need to resolve it;
* if the ref is actually a 'weak' ref, we don't need to resolve
* anything.
*/
if (git_object_type(object) == GIT_OBJ_TAG) {
git_tag *tag = (git_tag *)object;
/*
* Find the object pointed at by this tag
*/
git_oid_cpy(&ref->peel, git_tag_target_id(tag));
ref->flags |= GIT_PACKREF_HAS_PEEL;
/*
* The reference has now cached the resolved OID, and is
* marked at such. When written to the packfile, it'll be
* accompanied by this resolved oid
*/
}
git_object_free(object);
return 0;
}
/*
* Write a single reference into a packfile
*/
static int packed_write_ref(struct packref *ref, git_filebuf *file)
{
char oid[GIT_OID_HEXSZ + 1];
git_oid_fmt(oid, &ref->oid);
oid[GIT_OID_HEXSZ] = 0;
/*
* For references that peel to an object in the repo, we must
* write the resulting peel on a separate line, e.g.
*
* 6fa8a902cc1d18527e1355773c86721945475d37 refs/tags/libgit2-0.4
* ^2ec0cb7959b0bf965d54f95453f5b4b34e8d3100
*
* This obviously only applies to tags.
* The required peels have already been loaded into `ref->peel_target`.
*/
if (ref->flags & GIT_PACKREF_HAS_PEEL) {
char peel[GIT_OID_HEXSZ + 1];
git_oid_fmt(peel, &ref->peel);
peel[GIT_OID_HEXSZ] = 0;
if (git_filebuf_printf(file, "%s %s\n^%s\n", oid, ref->name, peel) < 0)
return -1;
} else {
if (git_filebuf_printf(file, "%s %s\n", oid, ref->name) < 0)
return -1;
}
return 0;
}
/*
* Remove all loose references
*
* Once we have successfully written a packfile,
* all the loose references that were packed must be
* removed from disk.
*
* This is a dangerous method; make sure the packfile
* is well-written, because we are destructing references
* here otherwise.
*/
static int packed_remove_loose(
refdb_fs_backend *backend,
git_vector *packing_list)
{
size_t i;
git_buf full_path = GIT_BUF_INIT;
int failed = 0;
for (i = 0; i < packing_list->length; ++i) {
struct packref *ref = git_vector_get(packing_list, i);
if ((ref->flags & GIT_PACKREF_WAS_LOOSE) == 0)
continue;
if (git_buf_joinpath(&full_path, backend->path, ref->name) < 0)
return -1; /* critical; do not try to recover on oom */
if (git_path_exists(full_path.ptr) == true && p_unlink(full_path.ptr) < 0) {
if (failed)
continue;
giterr_set(GITERR_REFERENCE,
"Failed to remove loose reference '%s' after packing: %s",
full_path.ptr, strerror(errno));
failed = 1;
}
/*
* if we fail to remove a single file, this is *not* good,
* but we should keep going and remove as many as possible.
* After we've removed as many files as possible, we return
* the error code anyway.
*/
}
git_buf_free(&full_path);
return failed ? -1 : 0;
}
/*
* Write all the contents in the in-memory packfile to disk.
*/
static int packed_write(refdb_fs_backend *backend)
{
git_filebuf pack_file = GIT_FILEBUF_INIT;
size_t i;
git_buf pack_file_path = GIT_BUF_INIT;
git_vector packing_list;
unsigned int total_refs;
assert(backend && backend->refcache.packfile);
total_refs =
(unsigned int)git_strmap_num_entries(backend->refcache.packfile);
if (git_vector_init(&packing_list, total_refs, packed_sort) < 0)
return -1;
/* Load all the packfile into a vector */
{
struct packref *reference;
/* cannot fail: vector already has the right size */
git_strmap_foreach_value(backend->refcache.packfile, reference, {
git_vector_insert(&packing_list, reference);
});
}
/* sort the vector so the entries appear sorted on the packfile */
git_vector_sort(&packing_list);
/* Now we can open the file! */
if (git_buf_joinpath(&pack_file_path,
backend->path, GIT_PACKEDREFS_FILE) < 0)
goto cleanup_memory;
if (git_filebuf_open(&pack_file, pack_file_path.ptr, 0) < 0)
goto cleanup_packfile;
/* Packfiles have a header... apparently
* This is in fact not required, but we might as well print it
* just for kicks */
if (git_filebuf_printf(&pack_file, "%s\n", GIT_PACKEDREFS_HEADER) < 0)
goto cleanup_packfile;
for (i = 0; i < packing_list.length; ++i) {
struct packref *ref = (struct packref *)git_vector_get(&packing_list, i);
if (packed_find_peel(backend, ref) < 0)
goto cleanup_packfile;
if (packed_write_ref(ref, &pack_file) < 0)
goto cleanup_packfile;
}
/* if we've written all the references properly, we can commit
* the packfile to make the changes effective */
if (git_filebuf_commit(&pack_file, GIT_PACKEDREFS_FILE_MODE) < 0)
goto cleanup_memory;
/* when and only when the packfile has been properly written,
* we can go ahead and remove the loose refs */
if (packed_remove_loose(backend, &packing_list) < 0)
goto cleanup_memory;
{
struct stat st;
if (p_stat(pack_file_path.ptr, &st) == 0)
backend->refcache.packfile_time = st.st_mtime;
}
git_vector_free(&packing_list);
git_buf_free(&pack_file_path);
/* we're good now */
return 0;
cleanup_packfile:
git_filebuf_cleanup(&pack_file);
cleanup_memory:
git_vector_free(&packing_list);
git_buf_free(&pack_file_path);
return -1;
}
static int refdb_fs_backend__write(
git_refdb_backend *_backend,
const git_reference *ref)
{
refdb_fs_backend *backend;
assert(_backend);
backend = (refdb_fs_backend *)_backend;
return loose_write(backend, ref);
}
static int refdb_fs_backend__delete(
git_refdb_backend *_backend,
const git_reference *ref)
{
refdb_fs_backend *backend;
git_repository *repo;
git_buf loose_path = GIT_BUF_INIT;
struct packref *pack_ref;
khiter_t pack_ref_pos;
int error = 0, pack_error;
bool loose_deleted;
assert(_backend);
assert(ref);
backend = (refdb_fs_backend *)_backend;
repo = backend->repo;
/* If a loose reference exists, remove it from the filesystem */
if (git_buf_joinpath(&loose_path, repo->path_repository, ref->name) < 0)
return -1;
if (git_path_isfile(loose_path.ptr)) {
error = p_unlink(loose_path.ptr);
loose_deleted = 1;
}
git_buf_free(&loose_path);
if (error != 0)
return error;
/* If a packed reference exists, remove it from the packfile and repack */
if ((pack_error = packed_map_entry(&pack_ref, &pack_ref_pos, backend, ref->name)) == 0) {
git_strmap_delete_at(backend->refcache.packfile, pack_ref_pos);
git__free(pack_ref);
error = packed_write(backend);
}
if (pack_error == GIT_ENOTFOUND)
error = loose_deleted ? 0 : GIT_ENOTFOUND;
else
error = pack_error;
return error;
}
static int refdb_fs_backend__compress(git_refdb_backend *_backend)
{
refdb_fs_backend *backend;
assert(_backend);
backend = (refdb_fs_backend *)_backend;
if (packed_load(backend) < 0 || /* load the existing packfile */
packed_loadloose(backend) < 0 || /* add all the loose refs */
packed_write(backend) < 0) /* write back to disk */
return -1;
return 0;
}
static void refcache_free(git_refcache *refs)
{
assert(refs);
if (refs->packfile) {
struct packref *reference;
git_strmap_foreach_value(refs->packfile, reference, {
git__free(reference);
});
git_strmap_free(refs->packfile);
}
}
static void refdb_fs_backend__free(git_refdb_backend *_backend)
{
refdb_fs_backend *backend;
assert(_backend);
backend = (refdb_fs_backend *)_backend;
refcache_free(&backend->refcache);
git__free(backend);
}
int git_refdb_backend_fs(
git_refdb_backend **backend_out,
git_repository *repository)
{
refdb_fs_backend *backend;
backend = git__calloc(1, sizeof(refdb_fs_backend));
GITERR_CHECK_ALLOC(backend);
backend->repo = repository;
backend->path = repository->path_repository;
backend->parent.exists = &refdb_fs_backend__exists;
backend->parent.lookup = &refdb_fs_backend__lookup;
backend->parent.foreach = &refdb_fs_backend__foreach;
backend->parent.write = &refdb_fs_backend__write;
backend->parent.delete = &refdb_fs_backend__delete;
backend->parent.compress = &refdb_fs_backend__compress;
backend->parent.free = &refdb_fs_backend__free;
*backend_out = (git_refdb_backend *)backend;
return 0;
}
