[thirdparty/git.git] / builtin-prune.c

#include "cache.h"
#include "commit.h"
#include "diff.h"
#include "revision.h"
#include "builtin.h"
#include "reachable.h"
#include "parse-options.h"

static const char * const prune_usage[] = {
	"git prune [-n] [--expire <time>] [--] [<head>...]",
	NULL
};
static int show_only;
static unsigned long expire;

static int prune_tmp_object(const char *path, const char *filename)
{
	const char *fullpath = mkpath("%s/%s", path, filename);
	if (expire) {
		struct stat st;
		if (lstat(fullpath, &st))
			return error("Could not stat '%s'", fullpath);
		if (st.st_mtime > expire)
			return 0;
	}
	printf("Removing stale temporary file %s\n", fullpath);
	if (!show_only)
		unlink(fullpath);
	return 0;
}

static int prune_object(char *path, const char *filename, const unsigned char *sha1)
{
	const char *fullpath = mkpath("%s/%s", path, filename);
	if (expire) {
		struct stat st;
		if (lstat(fullpath, &st))
			return error("Could not stat '%s'", fullpath);
		if (st.st_mtime > expire)
			return 0;
	}
	if (show_only) {
		enum object_type type = sha1_object_info(sha1, NULL);
		printf("%s %s\n", sha1_to_hex(sha1),
		       (type > 0) ? typename(type) : "unknown");
	} else
		unlink(fullpath);
	return 0;
}

static int prune_dir(int i, char *path)
{
	DIR *dir = opendir(path);
	struct dirent *de;

	if (!dir)
		return 0;

	while ((de = readdir(dir)) != NULL) {
		char name[100];
		unsigned char sha1[20];
		int len = strlen(de->d_name);

		switch (len) {
		case 2:
			if (de->d_name[1] != '.')
				break;
		case 1:
			if (de->d_name[0] != '.')
				break;
			continue;
		case 38:
			sprintf(name, "%02x", i);
			memcpy(name+2, de->d_name, len+1);
			if (get_sha1_hex(name, sha1) < 0)
				break;

			/*
			 * Do we know about this object?
			 * It must have been reachable
			 */
			if (lookup_object(sha1))
				continue;

			prune_object(path, de->d_name, sha1);
			continue;
		}
		if (!prefixcmp(de->d_name, "tmp_obj_")) {
			prune_tmp_object(path, de->d_name);
			continue;
		}
		fprintf(stderr, "bad sha1 file: %s/%s\n", path, de->d_name);
	}
	if (!show_only)
		rmdir(path);
	closedir(dir);
	return 0;
}

static void prune_object_dir(const char *path)
{
	int i;
	for (i = 0; i < 256; i++) {
		static char dir[4096];
		sprintf(dir, "%s/%02x", path, i);
		prune_dir(i, dir);
	}
}

/*
 * Write errors (particularly out of space) can result in
 * failed temporary packs (and more rarely indexes and other
 * files begining with "tmp_") accumulating in the object
 * and the pack directories.
 */
static void remove_temporary_files(const char *path)
{
	DIR *dir;
	struct dirent *de;

	dir = opendir(path);
	if (!dir) {
		fprintf(stderr, "Unable to open directory %s\n", path);
		return;
	}
	while ((de = readdir(dir)) != NULL)
		if (!prefixcmp(de->d_name, "tmp_"))
			prune_tmp_object(path, de->d_name);
	closedir(dir);
}

int cmd_prune(int argc, const char **argv, const char *prefix)
{
	struct rev_info revs;
	const struct option options[] = {
		OPT_BOOLEAN('n', NULL, &show_only,
			    "do not remove, show only"),
		OPT_DATE(0, "expire", &expire,
			 "expire objects older than <time>"),
		OPT_END()
	};
	char *s;

	save_commit_buffer = 0;
	init_revisions(&revs, prefix);

	argc = parse_options(argc, argv, options, prune_usage, 0);
	while (argc--) {
		unsigned char sha1[20];
		const char *name = *argv++;

		if (!get_sha1(name, sha1)) {
			struct object *object = parse_object(sha1);
			if (!object)
				die("bad object: %s", name);
			add_pending_object(&revs, object, "");
		}
		else
			die("unrecognized argument: %s", name);
	}
	mark_reachable_objects(&revs, 1);
	prune_object_dir(get_object_directory());

	prune_packed_objects(show_only);
	remove_temporary_files(get_object_directory());
	s = xstrdup(mkpath("%s/pack", get_object_directory()));
	remove_temporary_files(s);
	free(s);
	return 0;
}
Commit	Line	Data
ba84a797	1	#include "cache.h"
ba84a797	2	#include "commit.h"
ba84a797 LT	3	#include "diff.h"
	4	#include "revision.h"
	5	#include "builtin.h"
94421474	6	#include "reachable.h"
629de472	7	#include "parse-options.h"
ba84a797	8
629de472	9	static const char * const prune_usage[] = {
1b1dd23f	10	"git prune [-n] [--expire <time>] [--] [<head>...]",
629de472 MB	11	NULL
629de472 MB	12	};
96f1e58f	13	static int show_only;
f01913e4	14	static unsigned long expire;
ba84a797	15
db87e396	16	static int prune_tmp_object(const char path, const char filename)
0e8316cc BC	17	{
	18	const char *fullpath = mkpath("%s/%s", path, filename);
	19	if (expire) {
	20	struct stat st;
	21	if (lstat(fullpath, &st))
	22	return error("Could not stat '%s'", fullpath);
	23	if (st.st_mtime > expire)
	24	return 0;
	25	}
	26	printf("Removing stale temporary file %s\n", fullpath);
	27	if (!show_only)
	28	unlink(fullpath);
	29	return 0;
	30	}
	31
ba84a797 LT	32	static int prune_object(char path, const char filename, const unsigned char *sha1)
ba84a797 LT	33	{
f01913e4 JS	34	const char *fullpath = mkpath("%s/%s", path, filename);
	35	if (expire) {
	36	struct stat st;
	37	if (lstat(fullpath, &st))
	38	return error("Could not stat '%s'", fullpath);
	39	if (st.st_mtime > expire)
	40	return 0;
	41	}
ba84a797	42	if (show_only) {
21666f1a NP	43	enum object_type type = sha1_object_info(sha1, NULL);
	44	printf("%s %s\n", sha1_to_hex(sha1),
	45	(type > 0) ? typename(type) : "unknown");
3254d218	46	} else
f01913e4	47	unlink(fullpath);
ba84a797 LT	48	return 0;
	49	}
	50
	51	static int prune_dir(int i, char *path)
	52	{
	53	DIR *dir = opendir(path);
	54	struct dirent *de;
	55
	56	if (!dir)
	57	return 0;
	58
	59	while ((de = readdir(dir)) != NULL) {
	60	char name[100];
	61	unsigned char sha1[20];
	62	int len = strlen(de->d_name);
	63
	64	switch (len) {
	65	case 2:
	66	if (de->d_name[1] != '.')
	67	break;
	68	case 1:
	69	if (de->d_name[0] != '.')
	70	break;
	71	continue;
	72	case 38:
	73	sprintf(name, "%02x", i);
	74	memcpy(name+2, de->d_name, len+1);
	75	if (get_sha1_hex(name, sha1) < 0)
	76	break;
	77
	78	/*
	79	* Do we know about this object?
	80	* It must have been reachable
	81	*/
	82	if (lookup_object(sha1))
	83	continue;
	84
	85	prune_object(path, de->d_name, sha1);
	86	continue;
	87	}
3d32a46b BC	88	if (!prefixcmp(de->d_name, "tmp_obj_")) {
	89	prune_tmp_object(path, de->d_name);
	90	continue;
	91	}
ba84a797 LT	92	fprintf(stderr, "bad sha1 file: %s/%s\n", path, de->d_name);
ba84a797 LT	93	}
3254d218 NP	94	if (!show_only)
3254d218 NP	95	rmdir(path);
ba84a797 LT	96	closedir(dir);
	97	return 0;
	98	}
	99
	100	static void prune_object_dir(const char *path)
	101	{
	102	int i;
	103	for (i = 0; i < 256; i++) {
	104	static char dir[4096];
	105	sprintf(dir, "%s/%02x", path, i);
	106	prune_dir(i, dir);
	107	}
	108	}
	109
8464010f DST	110	/*
	111	* Write errors (particularly out of space) can result in
	112	* failed temporary packs (and more rarely indexes and other
db87e396 BC	113	* files begining with "tmp_") accumulating in the object
db87e396 BC	114	* and the pack directories.
8464010f	115	*/
db87e396	116	static void remove_temporary_files(const char *path)
8464010f DST	117	{
	118	DIR *dir;
	119	struct dirent *de;
8464010f	120
db87e396	121	dir = opendir(path);
8464010f	122	if (!dir) {
db87e396	123	fprintf(stderr, "Unable to open directory %s\n", path);
8464010f DST	124	return;
8464010f DST	125	}
0e8316cc BC	126	while ((de = readdir(dir)) != NULL)
0e8316cc BC	127	if (!prefixcmp(de->d_name, "tmp_"))
db87e396	128	prune_tmp_object(path, de->d_name);
8464010f DST	129	closedir(dir);
	130	}
	131
a633fca0	132	int cmd_prune(int argc, const char *argv, const char prefix)
ba84a797	133	{
24304816	134	struct rev_info revs;
629de472 MB	135	const struct option options[] = {
	136	OPT_BOOLEAN('n', NULL, &show_only,
	137	"do not remove, show only"),
	138	OPT_DATE(0, "expire", &expire,
	139	"expire objects older than <time>"),
	140	OPT_END()
	141	};
db87e396	142	char *s;
ba84a797	143
16157b80	144	save_commit_buffer = 0;
a633fca0	145	init_revisions(&revs, prefix);
ba84a797	146
629de472	147	argc = parse_options(argc, argv, options, prune_usage, 0);
fe308f53 JH	148	while (argc--) {
	149	unsigned char sha1[20];
	150	const char name = argv++;
	151
	152	if (!get_sha1(name, sha1)) {
	153	struct object *object = parse_object(sha1);
	154	if (!object)
	155	die("bad object: %s", name);
	156	add_pending_object(&revs, object, "");
	157	}
	158	else
	159	die("unrecognized argument: %s", name);
	160	}
629de472	161	mark_reachable_objects(&revs, 1);
ba84a797 LT	162	prune_object_dir(get_object_directory());
ba84a797 LT	163
2eb53e65	164	prune_packed_objects(show_only);
db87e396 BC	165	remove_temporary_files(get_object_directory());
	166	s = xstrdup(mkpath("%s/pack", get_object_directory()));
	167	remove_temporary_files(s);
	168	free(s);
ba84a797 LT	169	return 0;
ba84a797 LT	170	}