[git/git.git] / list-objects-filter-options.c

#include "cache.h"
#include "commit.h"
#include "config.h"
#include "revision.h"
#include "argv-array.h"
#include "list-objects.h"
#include "list-objects-filter.h"
#include "list-objects-filter-options.h"
#include "trace.h"
#include "url.h"

static int parse_combine_filter(
	struct list_objects_filter_options *filter_options,
	const char *arg,
	struct strbuf *errbuf);

/*
 * Parse value of the argument to the "filter" keyword.
 * On the command line this looks like:
 *       --filter=<arg>
 * and in the pack protocol as:
 *       "filter" SP <arg>
 *
 * The filter keyword will be used by many commands.
 * See Documentation/rev-list-options.txt for allowed values for <arg>.
 *
 * Capture the given arg as the "filter_spec".  This can be forwarded to
 * subordinate commands when necessary (although it's better to pass it through
 * expand_list_objects_filter_spec() first).  We also "intern" the arg for the
 * convenience of the current command.
 */
static int gently_parse_list_objects_filter(
	struct list_objects_filter_options *filter_options,
	const char *arg,
	struct strbuf *errbuf)
{
	const char *v0;

	if (filter_options->choice)
		BUG("filter_options already populated");

	if (!strcmp(arg, "blob:none")) {
		filter_options->choice = LOFC_BLOB_NONE;
		return 0;

	} else if (skip_prefix(arg, "blob:limit=", &v0)) {
		if (git_parse_ulong(v0, &filter_options->blob_limit_value)) {
			filter_options->choice = LOFC_BLOB_LIMIT;
			return 0;
		}

	} else if (skip_prefix(arg, "tree:", &v0)) {
		if (!git_parse_ulong(v0, &filter_options->tree_exclude_depth)) {
			strbuf_addstr(errbuf, _("expected 'tree:<depth>'"));
			return 1;
		}
		filter_options->choice = LOFC_TREE_DEPTH;
		return 0;

	} else if (skip_prefix(arg, "sparse:oid=", &v0)) {
		struct object_context oc;
		struct object_id sparse_oid;

		/*
		 * Try to parse <oid-expression> into an OID for the current
		 * command, but DO NOT complain if we don't have the blob or
		 * ref locally.
		 */
		if (!get_oid_with_context(the_repository, v0, GET_OID_BLOB,
					  &sparse_oid, &oc))
			filter_options->sparse_oid_value = oiddup(&sparse_oid);
		filter_options->choice = LOFC_SPARSE_OID;
		return 0;

	} else if (skip_prefix(arg, "sparse:path=", &v0)) {
		if (errbuf) {
			strbuf_addstr(
				errbuf,
				_("sparse:path filters support has been dropped"));
		}
		return 1;

	} else if (skip_prefix(arg, "combine:", &v0)) {
		return parse_combine_filter(filter_options, v0, errbuf);

	}
	/*
	 * Please update _git_fetch() in git-completion.bash when you
	 * add new filters
	 */

	strbuf_addf(errbuf, _("invalid filter-spec '%s'"), arg);

	memset(filter_options, 0, sizeof(*filter_options));
	return 1;
}

static const char *RESERVED_NON_WS = "~`!@#$^&*()[]{}\\;'\",<>?";

static int has_reserved_character(
	struct strbuf *sub_spec, struct strbuf *errbuf)
{
	const char *c = sub_spec->buf;
	while (*c) {
		if (*c <= ' ' || strchr(RESERVED_NON_WS, *c)) {
			strbuf_addf(
				errbuf,
				_("must escape char in sub-filter-spec: '%c'"),
				*c);
			return 1;
		}
		c++;
	}

	return 0;
}

static int parse_combine_subfilter(
	struct list_objects_filter_options *filter_options,
	struct strbuf *subspec,
	struct strbuf *errbuf)
{
	size_t new_index = filter_options->sub_nr;
	char *decoded;
	int result;

	ALLOC_GROW_BY(filter_options->sub, filter_options->sub_nr, 1,
		      filter_options->sub_alloc);

	decoded = url_percent_decode(subspec->buf);

	result = has_reserved_character(subspec, errbuf) ||
		gently_parse_list_objects_filter(
			&filter_options->sub[new_index], decoded, errbuf);

	free(decoded);
	return result;
}

static int parse_combine_filter(
	struct list_objects_filter_options *filter_options,
	const char *arg,
	struct strbuf *errbuf)
{
	struct strbuf **subspecs = strbuf_split_str(arg, '+', 0);
	size_t sub;
	int result = 0;

	if (!subspecs[0]) {
		strbuf_addstr(errbuf, _("expected something after combine:"));
		result = 1;
		goto cleanup;
	}

	for (sub = 0; subspecs[sub] && !result; sub++) {
		if (subspecs[sub + 1]) {
			/*
			 * This is not the last subspec. Remove trailing "+" so
			 * we can parse it.
			 */
			size_t last = subspecs[sub]->len - 1;
			assert(subspecs[sub]->buf[last] == '+');
			strbuf_remove(subspecs[sub], last, 1);
		}
		result = parse_combine_subfilter(
			filter_options, subspecs[sub], errbuf);
	}

	filter_options->choice = LOFC_COMBINE;

cleanup:
	strbuf_list_free(subspecs);
	if (result) {
		list_objects_filter_release(filter_options);
		memset(filter_options, 0, sizeof(*filter_options));
	}
	return result;
}

static int allow_unencoded(char ch)
{
	if (ch <= ' ' || ch == '%' || ch == '+')
		return 0;
	return !strchr(RESERVED_NON_WS, ch);
}

static void filter_spec_append_urlencode(
	struct list_objects_filter_options *filter, const char *raw)
{
	struct strbuf buf = STRBUF_INIT;
	strbuf_addstr_urlencode(&buf, raw, allow_unencoded);
	trace_printf("Add to combine filter-spec: %s\n", buf.buf);
	string_list_append(&filter->filter_spec, strbuf_detach(&buf, NULL));
}

/*
 * Changes filter_options into an equivalent LOFC_COMBINE filter options
 * instance. Does not do anything if filter_options is already LOFC_COMBINE.
 */
static void transform_to_combine_type(
	struct list_objects_filter_options *filter_options)
{
	assert(filter_options->choice);
	if (filter_options->choice == LOFC_COMBINE)
		return;
	{
		const int initial_sub_alloc = 2;
		struct list_objects_filter_options *sub_array =
			xcalloc(initial_sub_alloc, sizeof(*sub_array));
		sub_array[0] = *filter_options;
		memset(filter_options, 0, sizeof(*filter_options));
		filter_options->sub = sub_array;
		filter_options->sub_alloc = initial_sub_alloc;
	}
	filter_options->sub_nr = 1;
	filter_options->choice = LOFC_COMBINE;
	string_list_append(&filter_options->filter_spec, xstrdup("combine:"));
	filter_spec_append_urlencode(
		filter_options,
		list_objects_filter_spec(&filter_options->sub[0]));
	/*
	 * We don't need the filter_spec strings for subfilter specs, only the
	 * top level.
	 */
	string_list_clear(&filter_options->sub[0].filter_spec, /*free_util=*/0);
}

void list_objects_filter_die_if_populated(
	struct list_objects_filter_options *filter_options)
{
	if (filter_options->choice)
		die(_("multiple filter-specs cannot be combined"));
}

int parse_list_objects_filter(
	struct list_objects_filter_options *filter_options,
	const char *arg)
{
	struct strbuf errbuf = STRBUF_INIT;
	int parse_error;

	if (!filter_options->choice) {
		string_list_append(&filter_options->filter_spec, xstrdup(arg));

		parse_error = gently_parse_list_objects_filter(
			filter_options, arg, &errbuf);
	} else {
		/*
		 * Make filter_options an LOFC_COMBINE spec so we can trivially
		 * add subspecs to it.
		 */
		transform_to_combine_type(filter_options);

		string_list_append(&filter_options->filter_spec, xstrdup("+"));
		filter_spec_append_urlencode(filter_options, arg);
		ALLOC_GROW_BY(filter_options->sub, filter_options->sub_nr, 1,
			      filter_options->sub_alloc);

		parse_error = gently_parse_list_objects_filter(
			&filter_options->sub[filter_options->sub_nr - 1], arg,
			&errbuf);
	}
	if (parse_error)
		die("%s", errbuf.buf);
	return 0;
}

int opt_parse_list_objects_filter(const struct option *opt,
				  const char *arg, int unset)
{
	struct list_objects_filter_options *filter_options = opt->value;

	if (unset || !arg) {
		list_objects_filter_set_no_filter(filter_options);
		return 0;
	}

	return parse_list_objects_filter(filter_options, arg);
}

const char *list_objects_filter_spec(struct list_objects_filter_options *filter)
{
	if (!filter->filter_spec.nr)
		BUG("no filter_spec available for this filter");
	if (filter->filter_spec.nr != 1) {
		struct strbuf concatted = STRBUF_INIT;
		strbuf_add_separated_string_list(
			&concatted, "", &filter->filter_spec);
		string_list_clear(&filter->filter_spec, /*free_util=*/0);
		string_list_append(
			&filter->filter_spec, strbuf_detach(&concatted, NULL));
	}

	return filter->filter_spec.items[0].string;
}

const char *expand_list_objects_filter_spec(
	struct list_objects_filter_options *filter)
{
	if (filter->choice == LOFC_BLOB_LIMIT) {
		struct strbuf expanded_spec = STRBUF_INIT;
		strbuf_addf(&expanded_spec, "blob:limit=%lu",
			    filter->blob_limit_value);
		string_list_clear(&filter->filter_spec, /*free_util=*/0);
		string_list_append(
			&filter->filter_spec,
			strbuf_detach(&expanded_spec, NULL));
	}

	return list_objects_filter_spec(filter);
}

void list_objects_filter_release(
	struct list_objects_filter_options *filter_options)
{
	size_t sub;

	if (!filter_options)
		return;
	string_list_clear(&filter_options->filter_spec, /*free_util=*/0);
	free(filter_options->sparse_oid_value);
	for (sub = 0; sub < filter_options->sub_nr; sub++)
		list_objects_filter_release(&filter_options->sub[sub]);
	free(filter_options->sub);
	memset(filter_options, 0, sizeof(*filter_options));
}

void partial_clone_register(
	const char *remote,
	struct list_objects_filter_options *filter_options)
{
	/*
	 * Record the name of the partial clone remote in the
	 * config and in the global variable -- the latter is
	 * used throughout to indicate that partial clone is
	 * enabled and to expect missing objects.
	 */
	if (repository_format_partial_clone &&
	    *repository_format_partial_clone &&
	    strcmp(remote, repository_format_partial_clone))
		die(_("cannot change partial clone promisor remote"));

	git_config_set("core.repositoryformatversion", "1");
	git_config_set("extensions.partialclone", remote);

	repository_format_partial_clone = xstrdup(remote);

	/*
	 * Record the initial filter-spec in the config as
	 * the default for subsequent fetches from this remote.
	 */
	core_partial_clone_filter_default =
		xstrdup(expand_list_objects_filter_spec(filter_options));
	git_config_set("core.partialclonefilter",
		       core_partial_clone_filter_default);
}

void partial_clone_get_default_filter_spec(
	struct list_objects_filter_options *filter_options)
{
	struct strbuf errbuf = STRBUF_INIT;

	/*
	 * Parse default value, but silently ignore it if it is invalid.
	 */
	if (!core_partial_clone_filter_default)
		return;

	string_list_append(&filter_options->filter_spec,
			   core_partial_clone_filter_default);
	gently_parse_list_objects_filter(filter_options,
					 core_partial_clone_filter_default,
					 &errbuf);
	strbuf_release(&errbuf);
}
Commit	Line	Data
25ec7bca JH	1	#include "cache.h"
	2	#include "commit.h"
	3	#include "config.h"
	4	#include "revision.h"
	5	#include "argv-array.h"
	6	#include "list-objects.h"
	7	#include "list-objects-filter.h"
	8	#include "list-objects-filter-options.h"
489fc9ee	9	#include "trace.h"
e987df5f MD	10	#include "url.h"
	11
	12	static int parse_combine_filter(
	13	struct list_objects_filter_options *filter_options,
	14	const char *arg,
	15	struct strbuf *errbuf);
25ec7bca JH	16
25ec7bca JH	17	/*
1dde5fa2	18	* Parse value of the argument to the "filter" keyword.
25ec7bca JH	19	* On the command line this looks like:
	20	* --filter=<arg>
	21	* and in the pack protocol as:
	22	* "filter" SP <arg>
	23	*
	24	* The filter keyword will be used by many commands.
	25	* See Documentation/rev-list-options.txt for allowed values for <arg>.
	26	*
	27	* Capture the given arg as the "filter_spec". This can be forwarded to
87c2d9d3 JS	28	* subordinate commands when necessary (although it's better to pass it through
	29	* expand_list_objects_filter_spec() first). We also "intern" the arg for the
	30	* convenience of the current command.
25ec7bca	31	*/
1e1e39b3 JH	32	static int gently_parse_list_objects_filter(
	33	struct list_objects_filter_options *filter_options,
	34	const char *arg,
	35	struct strbuf *errbuf)
25ec7bca JH	36	{
	37	const char *v0;
	38
f56f7642 MD	39	if (filter_options->choice)
f56f7642 MD	40	BUG("filter_options already populated");
25ec7bca	41
25ec7bca JH	42	if (!strcmp(arg, "blob:none")) {
	43	filter_options->choice = LOFC_BLOB_NONE;
	44	return 0;
25ec7bca	45
1e1e39b3 JH	46	} else if (skip_prefix(arg, "blob:limit=", &v0)) {
	47	if (git_parse_ulong(v0, &filter_options->blob_limit_value)) {
	48	filter_options->choice = LOFC_BLOB_LIMIT;
	49	return 0;
	50	}
25ec7bca	51
bc5975d2	52	} else if (skip_prefix(arg, "tree:", &v0)) {
c813a7c3	53	if (!git_parse_ulong(v0, &filter_options->tree_exclude_depth)) {
842b0051	54	strbuf_addstr(errbuf, _("expected 'tree:<depth>'"));
bc5975d2 MD	55	return 1;
bc5975d2 MD	56	}
c813a7c3	57	filter_options->choice = LOFC_TREE_DEPTH;
bc5975d2 MD	58	return 0;
bc5975d2 MD	59
1e1e39b3	60	} else if (skip_prefix(arg, "sparse:oid=", &v0)) {
25ec7bca JH	61	struct object_context oc;
	62	struct object_id sparse_oid;
	63
	64	/*
	65	* Try to parse <oid-expression> into an OID for the current
	66	* command, but DO NOT complain if we don't have the blob or
	67	* ref locally.
	68	*/
3a7a698e	69	if (!get_oid_with_context(the_repository, v0, GET_OID_BLOB,
25ec7bca JH	70	&sparse_oid, &oc))
	71	filter_options->sparse_oid_value = oiddup(&sparse_oid);
	72	filter_options->choice = LOFC_SPARSE_OID;
	73	return 0;
25ec7bca	74
1e1e39b3	75	} else if (skip_prefix(arg, "sparse:path=", &v0)) {
e693237e CC	76	if (errbuf) {
	77	strbuf_addstr(
	78	errbuf,
	79	_("sparse:path filters support has been dropped"));
	80	}
	81	return 1;
e987df5f MD	82
	83	} else if (skip_prefix(arg, "combine:", &v0)) {
	84	return parse_combine_filter(filter_options, v0, errbuf);
	85
25ec7bca	86	}
5a59a230 NTND	87	/*
	88	* Please update _git_fetch() in git-completion.bash when you
	89	* add new filters
	90	*/
25ec7bca	91
842b0051	92	strbuf_addf(errbuf, _("invalid filter-spec '%s'"), arg);
cc0b05a4	93
1e1e39b3 JH	94	memset(filter_options, 0, sizeof(*filter_options));
	95	return 1;
	96	}
	97
e987df5f MD	98	static const char RESERVED_NON_WS = "~`!@#$^&()[]{}\\;'\",<>?";
	99
	100	static int has_reserved_character(
	101	struct strbuf sub_spec, struct strbuf errbuf)
	102	{
	103	const char *c = sub_spec->buf;
	104	while (*c) {
	105	if (c <= ' ' \|\| strchr(RESERVED_NON_WS, c)) {
	106	strbuf_addf(
	107	errbuf,
	108	_("must escape char in sub-filter-spec: '%c'"),
	109	*c);
	110	return 1;
	111	}
	112	c++;
	113	}
	114
	115	return 0;
	116	}
	117
	118	static int parse_combine_subfilter(
	119	struct list_objects_filter_options *filter_options,
	120	struct strbuf *subspec,
	121	struct strbuf *errbuf)
	122	{
5a133e8a	123	size_t new_index = filter_options->sub_nr;
e987df5f MD	124	char *decoded;
	125	int result;
	126
5a133e8a MD	127	ALLOC_GROW_BY(filter_options->sub, filter_options->sub_nr, 1,
5a133e8a MD	128	filter_options->sub_alloc);
e987df5f MD	129
	130	decoded = url_percent_decode(subspec->buf);
	131
	132	result = has_reserved_character(subspec, errbuf) \|\|
	133	gently_parse_list_objects_filter(
	134	&filter_options->sub[new_index], decoded, errbuf);
	135
	136	free(decoded);
	137	return result;
	138	}
	139
	140	static int parse_combine_filter(
	141	struct list_objects_filter_options *filter_options,
	142	const char *arg,
	143	struct strbuf *errbuf)
	144	{
	145	struct strbuf **subspecs = strbuf_split_str(arg, '+', 0);
	146	size_t sub;
	147	int result = 0;
	148
	149	if (!subspecs[0]) {
	150	strbuf_addstr(errbuf, _("expected something after combine:"));
	151	result = 1;
	152	goto cleanup;
	153	}
	154
	155	for (sub = 0; subspecs[sub] && !result; sub++) {
	156	if (subspecs[sub + 1]) {
	157	/*
	158	* This is not the last subspec. Remove trailing "+" so
	159	* we can parse it.
	160	*/
	161	size_t last = subspecs[sub]->len - 1;
	162	assert(subspecs[sub]->buf[last] == '+');
	163	strbuf_remove(subspecs[sub], last, 1);
	164	}
	165	result = parse_combine_subfilter(
	166	filter_options, subspecs[sub], errbuf);
	167	}
	168
	169	filter_options->choice = LOFC_COMBINE;
	170
	171	cleanup:
	172	strbuf_list_free(subspecs);
	173	if (result) {
	174	list_objects_filter_release(filter_options);
	175	memset(filter_options, 0, sizeof(*filter_options));
	176	}
	177	return result;
	178	}
	179
489fc9ee MD	180	static int allow_unencoded(char ch)
	181	{
	182	if (ch <= ' ' \|\| ch == '%' \|\| ch == '+')
	183	return 0;
	184	return !strchr(RESERVED_NON_WS, ch);
	185	}
	186
	187	static void filter_spec_append_urlencode(
	188	struct list_objects_filter_options filter, const char raw)
1e1e39b3 JH	189	{
1e1e39b3 JH	190	struct strbuf buf = STRBUF_INIT;
489fc9ee MD	191	strbuf_addstr_urlencode(&buf, raw, allow_unencoded);
	192	trace_printf("Add to combine filter-spec: %s\n", buf.buf);
	193	string_list_append(&filter->filter_spec, strbuf_detach(&buf, NULL));
	194	}
	195
	196	/*
	197	* Changes filter_options into an equivalent LOFC_COMBINE filter options
	198	* instance. Does not do anything if filter_options is already LOFC_COMBINE.
	199	*/
	200	static void transform_to_combine_type(
	201	struct list_objects_filter_options *filter_options)
	202	{
	203	assert(filter_options->choice);
	204	if (filter_options->choice == LOFC_COMBINE)
	205	return;
	206	{
	207	const int initial_sub_alloc = 2;
	208	struct list_objects_filter_options *sub_array =
	209	xcalloc(initial_sub_alloc, sizeof(*sub_array));
	210	sub_array[0] = *filter_options;
	211	memset(filter_options, 0, sizeof(*filter_options));
	212	filter_options->sub = sub_array;
	213	filter_options->sub_alloc = initial_sub_alloc;
	214	}
	215	filter_options->sub_nr = 1;
	216	filter_options->choice = LOFC_COMBINE;
	217	string_list_append(&filter_options->filter_spec, xstrdup("combine:"));
	218	filter_spec_append_urlencode(
	219	filter_options,
	220	list_objects_filter_spec(&filter_options->sub[0]));
	221	/*
	222	* We don't need the filter_spec strings for subfilter specs, only the
	223	* top level.
	224	*/
	225	string_list_clear(&filter_options->sub[0].filter_spec, /free_util=/0);
	226	}
	227
	228	void list_objects_filter_die_if_populated(
	229	struct list_objects_filter_options *filter_options)
	230	{
f56f7642 MD	231	if (filter_options->choice)
f56f7642 MD	232	die(_("multiple filter-specs cannot be combined"));
489fc9ee MD	233	}
	234
	235	int parse_list_objects_filter(
	236	struct list_objects_filter_options *filter_options,
	237	const char *arg)
	238	{
	239	struct strbuf errbuf = STRBUF_INIT;
	240	int parse_error;
	241
	242	if (!filter_options->choice) {
	243	string_list_append(&filter_options->filter_spec, xstrdup(arg));
	244
	245	parse_error = gently_parse_list_objects_filter(
	246	filter_options, arg, &errbuf);
	247	} else {
	248	/*
	249	* Make filter_options an LOFC_COMBINE spec so we can trivially
	250	* add subspecs to it.
	251	*/
	252	transform_to_combine_type(filter_options);
	253
	254	string_list_append(&filter_options->filter_spec, xstrdup("+"));
	255	filter_spec_append_urlencode(filter_options, arg);
5a133e8a MD	256	ALLOC_GROW_BY(filter_options->sub, filter_options->sub_nr, 1,
5a133e8a MD	257	filter_options->sub_alloc);
489fc9ee MD	258
489fc9ee MD	259	parse_error = gently_parse_list_objects_filter(
5a133e8a MD	260	&filter_options->sub[filter_options->sub_nr - 1], arg,
5a133e8a MD	261	&errbuf);
489fc9ee MD	262	}
	263	if (parse_error)
	264	die("%s", errbuf.buf);
25ec7bca JH	265	return 0;
	266	}
	267
	268	int opt_parse_list_objects_filter(const struct option *opt,
	269	const char *arg, int unset)
	270	{
	271	struct list_objects_filter_options *filter_options = opt->value;
	272
4875c979	273	if (unset \|\| !arg) {
aa57b871	274	list_objects_filter_set_no_filter(filter_options);
4875c979 JH	275	return 0;
4875c979 JH	276	}
25ec7bca JH	277
	278	return parse_list_objects_filter(filter_options, arg);
	279	}
4875c979	280
cf9ceb5a	281	const char list_objects_filter_spec(struct list_objects_filter_options filter)
87c2d9d3	282	{
cf9ceb5a MD	283	if (!filter->filter_spec.nr)
	284	BUG("no filter_spec available for this filter");
	285	if (filter->filter_spec.nr != 1) {
	286	struct strbuf concatted = STRBUF_INIT;
	287	strbuf_add_separated_string_list(
	288	&concatted, "", &filter->filter_spec);
	289	string_list_clear(&filter->filter_spec, /free_util=/0);
	290	string_list_append(
	291	&filter->filter_spec, strbuf_detach(&concatted, NULL));
	292	}
	293
	294	return filter->filter_spec.items[0].string;
	295	}
	296
	297	const char *expand_list_objects_filter_spec(
	298	struct list_objects_filter_options *filter)
	299	{
	300	if (filter->choice == LOFC_BLOB_LIMIT) {
	301	struct strbuf expanded_spec = STRBUF_INIT;
	302	strbuf_addf(&expanded_spec, "blob:limit=%lu",
87c2d9d3	303	filter->blob_limit_value);
cf9ceb5a MD	304	string_list_clear(&filter->filter_spec, /free_util=/0);
	305	string_list_append(
	306	&filter->filter_spec,
	307	strbuf_detach(&expanded_spec, NULL));
	308	}
	309
	310	return list_objects_filter_spec(filter);
87c2d9d3 JS	311	}
87c2d9d3 JS	312
4875c979 JH	313	void list_objects_filter_release(
	314	struct list_objects_filter_options *filter_options)
	315	{
e987df5f MD	316	size_t sub;
	317
	318	if (!filter_options)
	319	return;
cf9ceb5a	320	string_list_clear(&filter_options->filter_spec, /free_util=/0);
4875c979	321	free(filter_options->sparse_oid_value);
e987df5f MD	322	for (sub = 0; sub < filter_options->sub_nr; sub++)
	323	list_objects_filter_release(&filter_options->sub[sub]);
	324	free(filter_options->sub);
4875c979 JH	325	memset(filter_options, 0, sizeof(*filter_options));
4875c979 JH	326	}
1e1e39b3 JH	327
	328	void partial_clone_register(
	329	const char *remote,
cf9ceb5a	330	struct list_objects_filter_options *filter_options)
1e1e39b3 JH	331	{
	332	/*
	333	* Record the name of the partial clone remote in the
	334	* config and in the global variable -- the latter is
	335	* used throughout to indicate that partial clone is
	336	* enabled and to expect missing objects.
	337	*/
	338	if (repository_format_partial_clone &&
	339	*repository_format_partial_clone &&
	340	strcmp(remote, repository_format_partial_clone))
	341	die(_("cannot change partial clone promisor remote"));
	342
	343	git_config_set("core.repositoryformatversion", "1");
	344	git_config_set("extensions.partialclone", remote);
	345
	346	repository_format_partial_clone = xstrdup(remote);
	347
	348	/*
	349	* Record the initial filter-spec in the config as
	350	* the default for subsequent fetches from this remote.
	351	*/
	352	core_partial_clone_filter_default =
cf9ceb5a	353	xstrdup(expand_list_objects_filter_spec(filter_options));
1e1e39b3 JH	354	git_config_set("core.partialclonefilter",
	355	core_partial_clone_filter_default);
	356	}
	357
	358	void partial_clone_get_default_filter_spec(
	359	struct list_objects_filter_options *filter_options)
	360	{
842b0051 MD	361	struct strbuf errbuf = STRBUF_INIT;
842b0051 MD	362
1e1e39b3 JH	363	/*
	364	* Parse default value, but silently ignore it if it is invalid.
	365	*/
cac1137d JT	366	if (!core_partial_clone_filter_default)
cac1137d JT	367	return;
e987df5f	368
cf9ceb5a MD	369	string_list_append(&filter_options->filter_spec,
cf9ceb5a MD	370	core_partial_clone_filter_default);
1e1e39b3 JH	371	gently_parse_list_objects_filter(filter_options,
1e1e39b3 JH	372	core_partial_clone_filter_default,
842b0051 MD	373	&errbuf);
842b0051 MD	374	strbuf_release(&errbuf);
1e1e39b3	375	}