builtin/prune.c - git - Git at Google

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

 static const char * const prune_usage[] = {
 	N_("git prune [-n] [-v] [--expire <time>] [--] [<head>...]"),
 	NULL
 };
 static int show_only;
 static int verbose;
 static unsigned long expire;
 static int show_progress = -1;

 static int prune_tmp_file(const char *fullpath)
 {
 	struct stat st;
 	if (lstat(fullpath, &st))
 		return error("Could not stat '%s'", fullpath);
 	if (st.st_mtime > expire)
 		return 0;
 	if (show_only || verbose)
 		printf("Removing stale temporary file %s\n", fullpath);
 	if (!show_only)
 		unlink_or_warn(fullpath);
 	return 0;
 }

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

 static int prune_dir(int i, struct strbuf *path)
 {
 	size_t baselen = path->len;
 	DIR *dir = opendir(path->buf);
 	struct dirent *de;

 	if (!dir)
 		return 0;

 	while ((de = readdir(dir)) != NULL) {
 		char name[100];
 		unsigned char sha1[20];

 		if (is_dot_or_dotdot(de->d_name))
 			continue;
 		if (strlen(de->d_name) == 38) {
 			sprintf(name, "%02x", i);
 			memcpy(name+2, de->d_name, 39);
 			if (get_sha1_hex(name, sha1) < 0)
 				break;

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

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

 static void prune_object_dir(const char *path)
 {
 	struct strbuf buf = STRBUF_INIT;
 	size_t baselen;
 	int i;

 	strbuf_addstr(&buf, path);
 	strbuf_addch(&buf, '/');
 	baselen = buf.len;

 	for (i = 0; i < 256; i++) {
 		strbuf_addf(&buf, "%02x", i);
 		prune_dir(i, &buf);
 		strbuf_setlen(&buf, baselen);
 	}
 }

 /*
  * Write errors (particularly out of space) can result in
  * failed temporary packs (and more rarely indexes and other
  * files beginning 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 (starts_with(de->d_name, "tmp_"))
 			prune_tmp_file(mkpath("%s/%s", path, de->d_name));
 	closedir(dir);
 }

 int cmd_prune(int argc, const char **argv, const char *prefix)
 {
 	struct rev_info revs;
 	struct progress *progress = NULL;
 	const struct option options[] = {
 		OPT__DRY_RUN(&show_only, N_("do not remove, show only")),
 		OPT__VERBOSE(&verbose, N_("report pruned objects")),
 		OPT_BOOL(0, "progress", &show_progress, N_("show progress")),
 		OPT_EXPIRY_DATE(0, "expire", &expire,
 				N_("expire objects older than <time>")),
 		OPT_END()
 	};
 	char *s;

 	expire = ULONG_MAX;
 	save_commit_buffer = 0;
 	read_replace_refs = 0;
 	init_revisions(&revs, prefix);

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

 		if (!get_sha1(name, sha1)) {
 			struct object *object = parse_object_or_die(sha1, name);
 			add_pending_object(&revs, object, "");
 		}
 		else
 			die("unrecognized argument: %s", name);
 	}

 	if (show_progress == -1)
 		show_progress = isatty(2);
 	if (show_progress)
 		progress = start_progress_delay("Checking connectivity", 0, 0, 2);

 	mark_reachable_objects(&revs, 1, progress);
 	stop_progress(&progress);
 	prune_object_dir(get_object_directory());

 	prune_packed_objects(show_only ? PRUNE_PACKED_DRY_RUN : 0);
 	remove_temporary_files(get_object_directory());
 	s = mkpathdup("%s/pack", get_object_directory());
 	remove_temporary_files(s);
 	free(s);

 	if (is_repository_shallow())
 		prune_shallow(show_only);

 	return 0;
 }
	#include "cache.h"
	#include "commit.h"
	#include "diff.h"
	#include "revision.h"
	#include "builtin.h"
	#include "reachable.h"
	#include "parse-options.h"
	#include "progress.h"
	#include "dir.h"

	static const char * const prune_usage[] = {
	N_("git prune [-n] [-v] [--expire <time>] [--] [<head>...]"),
	NULL
	};
	static int show_only;
	static int verbose;
	static unsigned long expire;
	static int show_progress = -1;

	static int prune_tmp_file(const char *fullpath)
	{
	struct stat st;
	if (lstat(fullpath, &st))
	return error("Could not stat '%s'", fullpath);
	if (st.st_mtime > expire)
	return 0;
	if (show_only \|\| verbose)
	printf("Removing stale temporary file %s\n", fullpath);
	if (!show_only)
	unlink_or_warn(fullpath);
	return 0;
	}

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

	static int prune_dir(int i, struct strbuf *path)
	{
	size_t baselen = path->len;
	DIR *dir = opendir(path->buf);
	struct dirent *de;

	if (!dir)
	return 0;

	while ((de = readdir(dir)) != NULL) {
	char name[100];
	unsigned char sha1[20];

	if (is_dot_or_dotdot(de->d_name))
	continue;
	if (strlen(de->d_name) == 38) {
	sprintf(name, "%02x", i);
	memcpy(name+2, de->d_name, 39);
	if (get_sha1_hex(name, sha1) < 0)
	break;

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

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

	static void prune_object_dir(const char *path)
	{
	struct strbuf buf = STRBUF_INIT;
	size_t baselen;
	int i;

	strbuf_addstr(&buf, path);
	strbuf_addch(&buf, '/');
	baselen = buf.len;

	for (i = 0; i < 256; i++) {
	strbuf_addf(&buf, "%02x", i);
	prune_dir(i, &buf);
	strbuf_setlen(&buf, baselen);
	}
	}

	/*
	* Write errors (particularly out of space) can result in
	* failed temporary packs (and more rarely indexes and other
	* files beginning 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 (starts_with(de->d_name, "tmp_"))
	prune_tmp_file(mkpath("%s/%s", path, de->d_name));
	closedir(dir);
	}

	int cmd_prune(int argc, const char *argv, const char prefix)
	{
	struct rev_info revs;
	struct progress *progress = NULL;
	const struct option options[] = {
	OPT__DRY_RUN(&show_only, N_("do not remove, show only")),
	OPT__VERBOSE(&verbose, N_("report pruned objects")),
	OPT_BOOL(0, "progress", &show_progress, N_("show progress")),
	OPT_EXPIRY_DATE(0, "expire", &expire,
	N_("expire objects older than <time>")),
	OPT_END()
	};
	char *s;

	expire = ULONG_MAX;
	save_commit_buffer = 0;
	read_replace_refs = 0;
	init_revisions(&revs, prefix);

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

	if (!get_sha1(name, sha1)) {
	struct object *object = parse_object_or_die(sha1, name);
	add_pending_object(&revs, object, "");
	}
	else
	die("unrecognized argument: %s", name);
	}

	if (show_progress == -1)
	show_progress = isatty(2);
	if (show_progress)
	progress = start_progress_delay("Checking connectivity", 0, 0, 2);

	mark_reachable_objects(&revs, 1, progress);
	stop_progress(&progress);
	prune_object_dir(get_object_directory());

	prune_packed_objects(show_only ? PRUNE_PACKED_DRY_RUN : 0);
	remove_temporary_files(get_object_directory());
	s = mkpathdup("%s/pack", get_object_directory());
	remove_temporary_files(s);
	free(s);

	if (is_repository_shallow())
	prune_shallow(show_only);

	return 0;
	}