static int string_list_add_one_ref(const char *refname, const struct object_id *oid,
int flag, void *cb)
{
struct string_list *refs = cb;
if (!unsorted_string_list_has_string(refs, refname))
string_list_append(refs, refname);
return 0;
}
static int string_list_add_one_ref(const char *path, const unsigned char *sha1,
int flag, void *cb)
{
struct string_list *refs = cb;
if (!unsorted_string_list_has_string(refs, path))
string_list_append(refs, path);
return 0;
}
void string_list_add_refs_by_glob(struct string_list *list, const char *glob)
{
if (has_glob_specials(glob)) {
for_each_glob_ref(string_list_add_one_ref, glob, list);
} else {
unsigned char sha1[20];
if (get_sha1(glob, sha1))
warning("notes ref %s is invalid", glob);
if (!unsorted_string_list_has_string(list, glob))
string_list_append(list, glob);
}
}
/*
* The list argument must have strdup_strings set on it.
*/
void string_list_add_refs_by_glob(struct string_list *list, const char *glob)
{
assert(list->strdup_strings);
if (has_glob_specials(glob)) {
for_each_glob_ref(string_list_add_one_ref, glob, list);
} else {
struct object_id oid;
if (get_oid(glob, &oid))
warning("notes ref %s is invalid", glob);
if (!unsorted_string_list_has_string(list, glob))
string_list_append(list, glob);
}
}
/*
* Create a newly-allocated `snapshot` of the `packed-refs` file in
* its current state and return it. The return value will already have
* its reference count incremented.
*
* A comment line of the form "# pack-refs with: " may contain zero or
* more traits. We interpret the traits as follows:
*
* Neither `peeled` nor `fully-peeled`:
*
* Probably no references are peeled. But if the file contains a
* peeled value for a reference, we will use it.
*
* `peeled`:
*
* References under "refs/tags/", if they *can* be peeled, *are*
* peeled in this file. References outside of "refs/tags/" are
* probably not peeled even if they could have been, but if we find
* a peeled value for such a reference we will use it.
*
* `fully-peeled`:
*
* All references in the file that can be peeled are peeled.
* Inversely (and this is more important), any references in the
* file for which no peeled value is recorded is not peelable. This
* trait should typically be written alongside "peeled" for
* compatibility with older clients, but we do not require it
* (i.e., "peeled" is a no-op if "fully-peeled" is set).
*
* `sorted`:
*
* The references in this file are known to be sorted by refname.
*/
static struct snapshot *create_snapshot(struct packed_ref_store *refs)
{
struct snapshot *snapshot = xcalloc(1, sizeof(*snapshot));
int sorted = 0;
snapshot->refs = refs;
acquire_snapshot(snapshot);
snapshot->peeled = PEELED_NONE;
if (!load_contents(snapshot))
return snapshot;
/* If the file has a header line, process it: */
if (snapshot->buf < snapshot->eof && *snapshot->buf == '#') {
struct strbuf tmp = STRBUF_INIT;
char *p;
const char *eol;
struct string_list traits = STRING_LIST_INIT_NODUP;
eol = memchr(snapshot->buf, '\n',
snapshot->eof - snapshot->buf);
if (!eol)
die_unterminated_line(refs->path,
snapshot->buf,
snapshot->eof - snapshot->buf);
strbuf_add(&tmp, snapshot->buf, eol - snapshot->buf);
if (!skip_prefix(tmp.buf, "# pack-refs with:", (const char **)&p))
die_invalid_line(refs->path,
snapshot->buf,
snapshot->eof - snapshot->buf);
string_list_split_in_place(&traits, p, ' ', -1);
if (unsorted_string_list_has_string(&traits, "fully-peeled"))
snapshot->peeled = PEELED_FULLY;
else if (unsorted_string_list_has_string(&traits, "peeled"))
snapshot->peeled = PEELED_TAGS;
sorted = unsorted_string_list_has_string(&traits, "sorted");
/* perhaps other traits later as well */
/* The "+ 1" is for the LF character. */
snapshot->header_len = eol + 1 - snapshot->buf;
string_list_clear(&traits, 0);
strbuf_release(&tmp);
}
verify_buffer_safe(snapshot);
if (!sorted) {
sort_snapshot(snapshot);
/*
* Reordering the records might have moved a short one
* to the end of the buffer, so verify the buffer's
* safety again:
*/
verify_buffer_safe(snapshot);
}
if (mmap_strategy != MMAP_OK && snapshot->mmapped) {
/*
* We don't want to leave the file mmapped, so we are
* forced to make a copy now:
*/
size_t size = snapshot->eof -
(snapshot->buf + snapshot->header_len);
char *buf_copy = xmalloc(size);
memcpy(buf_copy, snapshot->buf + snapshot->header_len, size);
clear_snapshot_buffer(snapshot);
snapshot->buf = buf_copy;
snapshot->eof = buf_copy + size;
}
return snapshot;
}
