static bool checkout_is_workdir_modified(
checkout_data *data,
const git_diff_file *baseitem,
const git_index_entry *wditem)
{
git_oid oid;
const git_index_entry *ie;
/* handle "modified" submodule */
if (wditem->mode == GIT_FILEMODE_COMMIT) {
git_submodule *sm;
unsigned int sm_status = 0;
const git_oid *sm_oid = NULL;
if (git_submodule_lookup(&sm, data->repo, wditem->path) < 0 ||
git_submodule_status(&sm_status, sm) < 0)
return true;
if (GIT_SUBMODULE_STATUS_IS_WD_DIRTY(sm_status))
return true;
sm_oid = git_submodule_wd_id(sm);
if (!sm_oid)
return false;
return (git_oid__cmp(&baseitem->oid, sm_oid) != 0);
}
/* Look at the cache to decide if the workdir is modified. If not,
* we can simply compare the oid in the cache to the baseitem instead
* of hashing the file.
*/
if ((ie = git_index_get_bypath(data->index, wditem->path, 0)) != NULL) {
if (wditem->mtime.seconds == ie->mtime.seconds &&
wditem->mtime.nanoseconds == ie->mtime.nanoseconds &&
wditem->file_size == ie->file_size)
return (git_oid__cmp(&baseitem->oid, &ie->oid) != 0);
}
/* depending on where base is coming from, we may or may not know
* the actual size of the data, so we can't rely on this shortcut.
*/
if (baseitem->size && wditem->file_size != baseitem->size)
return true;
if (git_diff__oid_for_file(
data->repo, wditem->path, wditem->mode,
wditem->file_size, &oid) < 0)
return false;
return (git_oid__cmp(&baseitem->oid, &oid) != 0);
}
static int objects_cmp(const void *a, const void *b)
{
const struct entry *entrya = (struct entry *)a;
const struct entry *entryb = (struct entry *)b;
return git_oid__cmp(&entrya->oid, &entryb->oid);
}
int git_attr_file__out_of_date(git_repository *repo, git_attr_file *file)
{
if (!file)
return 1;
switch (file->source) {
case GIT_ATTR_FILE__IN_MEMORY:
return 0;
case GIT_ATTR_FILE__FROM_FILE:
return git_futils_filestamp_check(
&file->cache_data.stamp, file->entry->fullpath);
case GIT_ATTR_FILE__FROM_INDEX: {
int error;
git_oid id;
if ((error = attr_file_oid_from_index(
&id, repo, file->entry->path)) < 0)
return error;
return (git_oid__cmp(&file->cache_data.oid, &id) != 0);
}
default:
giterr_set(GITERR_INVALID, "Invalid file type %d", file->source);
return -1;
}
}
int git_odb_exists_prefix(
git_oid *out, git_odb *db, const git_oid *short_id, size_t len)
{
int error = GIT_ENOTFOUND, num_found = 0;
size_t i;
git_oid key = {{0}}, last_found = {{0}}, found;
assert(db && short_id);
if (len < GIT_OID_MINPREFIXLEN)
return git_odb__error_ambiguous("prefix length too short");
if (len > GIT_OID_HEXSZ)
len = GIT_OID_HEXSZ;
if (len == GIT_OID_HEXSZ) {
if (git_odb_exists(db, short_id)) {
if (out)
git_oid_cpy(out, short_id);
return 0;
} else {
return git_odb__error_notfound("no match for id prefix", short_id);
}
}
/* just copy valid part of short_id */
memcpy(&key.id, short_id->id, (len + 1) / 2);
if (len & 1)
key.id[len / 2] &= 0xF0;
for (i = 0; i < db->backends.length; ++i) {
backend_internal *internal = (backend_internal *) git_vector_get(&db->backends, i);
git_odb_backend *b = internal->backend;
if (!b->exists_prefix)
continue;
error = b->exists_prefix(&found, b, &key, len);
if (error == GIT_ENOTFOUND || error == GIT_PASSTHROUGH)
continue;
if (error)
return error;
/* make sure found item doesn't introduce ambiguity */
if (num_found) {
if (git_oid__cmp(&last_found, &found))
return git_odb__error_ambiguous("multiple matches for prefix");
} else {
git_oid_cpy(&last_found, &found);
num_found++;
}
}
if (!num_found)
return git_odb__error_notfound("no match for id prefix", &key);
if (out)
git_oid_cpy(out, &last_found);
return 0;
}
int git_reference_cmp(git_reference *ref1, git_reference *ref2)
{
git_ref_t type1, type2;
assert(ref1 && ref2);
type1 = git_reference_type(ref1);
type2 = git_reference_type(ref2);
/* let's put symbolic refs before OIDs */
if (type1 != type2)
return (type1 == GIT_REF_SYMBOLIC) ? -1 : 1;
if (type1 == GIT_REF_SYMBOLIC)
return strcmp(ref1->target.symbolic, ref2->target.symbolic);
return git_oid__cmp(&ref1->target.oid, &ref2->target.oid);
}
static int reference_matches_remote_head(
const char *reference_name,
void *payload)
{
struct head_info *head_info = (struct head_info *)payload;
git_oid oid;
/* TODO: Should we guard against references
* which name doesn't start with refs/heads/ ?
*/
/* Stop looking if we've already found a match */
if (head_info->found)
return 0;
if (git_reference_name_to_id(
&oid,
head_info->repo,
reference_name) < 0) {
/* If the reference doesn't exists, it obviously cannot match the expected oid. */
giterr_clear();
return 0;
}
if (git_oid__cmp(&head_info->remote_head_oid, &oid) == 0) {
/* Determine the local reference name from the remote tracking one */
if (git_refspec_transform_l(
&head_info->branchname,
head_info->refspec,
reference_name) < 0)
return -1;
if (git_buf_len(&head_info->branchname) > 0) {
if (git_buf_sets(
&head_info->branchname,
git_buf_cstr(&head_info->branchname) + strlen(GIT_REFS_HEADS_DIR)) < 0)
return -1;
head_info->found = 1;
}
}
return 0;
}
int git_attr_file__out_of_date(
git_repository *repo,
git_attr_session *attr_session,
git_attr_file *file)
{
if (!file)
return 1;
/* we are never out of date if we just created this data in the same
* attr_session; otherwise, nonexistent files must be invalidated
*/
if (attr_session && attr_session->key == file->session_key)
return 0;
else if (file->nonexistent)
return 1;
switch (file->source) {
case GIT_ATTR_FILE__IN_MEMORY:
return 0;
case GIT_ATTR_FILE__FROM_FILE:
return git_futils_filestamp_check(
&file->cache_data.stamp, file->entry->fullpath);
case GIT_ATTR_FILE__FROM_INDEX: {
int error;
git_oid id;
if ((error = attr_file_oid_from_index(
&id, repo, file->entry->path)) < 0)
return error;
return (git_oid__cmp(&file->cache_data.oid, &id) != 0);
}
default:
giterr_set(GITERR_INVALID, "Invalid file type %d", file->source);
return -1;
}
}
int git_futils_readbuffer_updated(
git_buf *out, const char *path, git_oid *checksum, int *updated)
{
int error;
git_file fd;
struct stat st;
git_buf buf = GIT_BUF_INIT;
git_oid checksum_new;
assert(out && path && *path);
if (updated != NULL)
*updated = 0;
if (p_stat(path, &st) < 0)
return git_path_set_error(errno, path, "stat");
if (S_ISDIR(st.st_mode)) {
giterr_set(GITERR_INVALID, "requested file is a directory");
return GIT_ENOTFOUND;
}
if (!git__is_sizet(st.st_size+1)) {
giterr_set(GITERR_OS, "invalid regular file stat for '%s'", path);
return -1;
}
if ((fd = git_futils_open_ro(path)) < 0)
return fd;
if (git_futils_readbuffer_fd(&buf, fd, (size_t)st.st_size) < 0) {
p_close(fd);
return -1;
}
p_close(fd);
if (checksum) {
if ((error = git_hash_buf(&checksum_new, buf.ptr, buf.size)) < 0) {
git_buf_free(&buf);
return error;
}
/*
* If we were given a checksum, we only want to use it if it's different
*/
if (!git_oid__cmp(checksum, &checksum_new)) {
git_buf_free(&buf);
if (updated)
*updated = 0;
return 0;
}
git_oid_cpy(checksum, &checksum_new);
}
/*
* If we're here, the file did change, or the user didn't have an old version
*/
if (updated != NULL)
*updated = 1;
git_buf_swap(out, &buf);
git_buf_free(&buf);
return 0;
}
int git_odb_read_prefix(
git_odb_object **out, git_odb *db, const git_oid *short_id, size_t len)
{
size_t i;
int error = GIT_ENOTFOUND;
git_oid key = {{0}}, found_full_oid = {{0}};
git_rawobj raw;
void *data = NULL;
bool found = false;
git_odb_object *object;
assert(out && db);
if (len < GIT_OID_MINPREFIXLEN)
return git_odb__error_ambiguous("prefix length too short");
if (len > GIT_OID_HEXSZ)
len = GIT_OID_HEXSZ;
if (len == GIT_OID_HEXSZ) {
*out = git_cache_get_raw(odb_cache(db), short_id);
if (*out != NULL)
return 0;
}
/* just copy valid part of short_id */
memcpy(&key.id, short_id->id, (len + 1) / 2);
if (len & 1)
key.id[len / 2] &= 0xF0;
for (i = 0; i < db->backends.length; ++i) {
backend_internal *internal = (backend_internal *) git_vector_get(&db->backends, i);
git_odb_backend *b = internal->backend;
if (b->read_prefix != NULL) {
git_oid full_oid;
error = b->read_prefix(&full_oid, &raw.data, &raw.len, &raw.type, b, &key, len);
if (error == GIT_ENOTFOUND || error == GIT_PASSTHROUGH)
continue;
if (error)
return error;
git__free(data);
data = raw.data;
if (found && git_oid__cmp(&full_oid, &found_full_oid)) {
git__free(raw.data);
return git_odb__error_ambiguous("multiple matches for prefix");
}
found_full_oid = full_oid;
found = true;
}
}
if (!found)
return git_odb__error_notfound("no match for prefix", &key);
if ((object = odb_object__alloc(&found_full_oid, &raw)) == NULL)
return -1;
*out = (git_odb_object*) git_cache_store_raw(odb_cache(db), object);
return 0;
}
