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 "object-store.h"

 static const char * const prune_usage[] = {
 	N_("git prune [-n] [-v] [--progress] [--expire <time>] [--] [<head>...]"),
 	NULL
 };
 static int show_only;
 static int verbose;
 static timestamp_t 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 void perform_reachability_traversal(struct rev_info *revs)
 {
 	static int initialized;
 	struct progress *progress = NULL;

 	if (initialized)
 		return;

 	if (show_progress)
 		progress = start_delayed_progress(_("Checking connectivity"), 0);
 	mark_reachable_objects(revs, 1, expire, progress);
 	stop_progress(&progress);
 	initialized = 1;
 }

 static int is_object_reachable(const struct object_id *oid,
 			       struct rev_info *revs)
 {
 	struct object *obj;

 	perform_reachability_traversal(revs);

 	obj = lookup_object(the_repository, oid);
 	return obj && (obj->flags & SEEN);
 }

 static int prune_object(const struct object_id *oid, const char *fullpath,
 			void *data)
 {
 	struct rev_info *revs = data;
 	struct stat st;

 	if (is_object_reachable(oid, revs))
 		return 0;

 	if (lstat(fullpath, &st)) {
 		/* report errors, but do not stop pruning */
 		error("Could not stat '%s'", fullpath);
 		return 0;
 	}
 	if (st.st_mtime > expire)
 		return 0;
 	if (show_only || verbose) {
 		enum object_type type = oid_object_info(the_repository, oid,
 							NULL);
 		printf("%s %s\n", oid_to_hex(oid),
 		       (type > 0) ? type_name(type) : "unknown");
 	}
 	if (!show_only)
 		unlink_or_warn(fullpath);
 	return 0;
 }

 static int prune_cruft(const char *basename, const char *path, void *data)
 {
 	if (starts_with(basename, "tmp_obj_"))
 		prune_tmp_file(path);
 	else
 		fprintf(stderr, "bad sha1 file: %s\n", path);
 	return 0;
 }

 static int prune_subdir(unsigned int nr, const char *path, void *data)
 {
 	if (!show_only)
 		rmdir(path);
 	return 0;
 }

 /*
  * 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;
 	int exclude_promisor_objects = 0;
 	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_BOOL(0, "exclude-promisor-objects", &exclude_promisor_objects,
 			 N_("limit traversal to objects outside promisor packfiles")),
 		OPT_END()
 	};
 	char *s;

 	expire = TIME_MAX;
 	save_commit_buffer = 0;
 	read_replace_refs = 0;
 	ref_paranoia = 1;
 	repo_init_revisions(the_repository, &revs, prefix);

 	argc = parse_options(argc, argv, prefix, options, prune_usage, 0);

 	if (repository_format_precious_objects)
 		die(_("cannot prune in a precious-objects repo"));

 	while (argc--) {
 		struct object_id oid;
 		const char *name = *argv++;

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

 	if (show_progress == -1)
 		show_progress = isatty(2);
 	if (exclude_promisor_objects) {
 		fetch_if_missing = 0;
 		revs.exclude_promisor_objects = 1;
 	}

 	for_each_loose_file_in_objdir(get_object_directory(), prune_object,
 				      prune_cruft, prune_subdir, &revs);

 	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(the_repository)) {
 		perform_reachability_traversal(&revs);
 		prune_shallow(show_only ? PRUNE_SHOW_ONLY : 0);
 	}

 	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 "object-store.h"

	static const char * const prune_usage[] = {
	N_("git prune [-n] [-v] [--progress] [--expire <time>] [--] [<head>...]"),
	NULL
	};
	static int show_only;
	static int verbose;
	static timestamp_t 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 void perform_reachability_traversal(struct rev_info *revs)
	{
	static int initialized;
	struct progress *progress = NULL;

	if (initialized)
	return;

	if (show_progress)
	progress = start_delayed_progress(_("Checking connectivity"), 0);
	mark_reachable_objects(revs, 1, expire, progress);
	stop_progress(&progress);
	initialized = 1;
	}

	static int is_object_reachable(const struct object_id *oid,
	struct rev_info *revs)
	{
	struct object *obj;

	perform_reachability_traversal(revs);

	obj = lookup_object(the_repository, oid);
	return obj && (obj->flags & SEEN);
	}

	static int prune_object(const struct object_id oid, const char fullpath,
	void *data)
	{
	struct rev_info *revs = data;
	struct stat st;

	if (is_object_reachable(oid, revs))
	return 0;

	if (lstat(fullpath, &st)) {
	/* report errors, but do not stop pruning */
	error("Could not stat '%s'", fullpath);
	return 0;
	}
	if (st.st_mtime > expire)
	return 0;
	if (show_only \|\| verbose) {
	enum object_type type = oid_object_info(the_repository, oid,
	NULL);
	printf("%s %s\n", oid_to_hex(oid),
	(type > 0) ? type_name(type) : "unknown");
	}
	if (!show_only)
	unlink_or_warn(fullpath);
	return 0;
	}

	static int prune_cruft(const char basename, const char path, void *data)
	{
	if (starts_with(basename, "tmp_obj_"))
	prune_tmp_file(path);
	else
	fprintf(stderr, "bad sha1 file: %s\n", path);
	return 0;
	}

	static int prune_subdir(unsigned int nr, const char path, void data)
	{
	if (!show_only)
	rmdir(path);
	return 0;
	}

	/*
	* 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;
	int exclude_promisor_objects = 0;
	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_BOOL(0, "exclude-promisor-objects", &exclude_promisor_objects,
	N_("limit traversal to objects outside promisor packfiles")),
	OPT_END()
	};
	char *s;

	expire = TIME_MAX;
	save_commit_buffer = 0;
	read_replace_refs = 0;
	ref_paranoia = 1;
	repo_init_revisions(the_repository, &revs, prefix);

	argc = parse_options(argc, argv, prefix, options, prune_usage, 0);

	if (repository_format_precious_objects)
	die(_("cannot prune in a precious-objects repo"));

	while (argc--) {
	struct object_id oid;
	const char name = argv++;

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

	if (show_progress == -1)
	show_progress = isatty(2);
	if (exclude_promisor_objects) {
	fetch_if_missing = 0;
	revs.exclude_promisor_objects = 1;
	}

	for_each_loose_file_in_objdir(get_object_directory(), prune_object,
	prune_cruft, prune_subdir, &revs);

	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(the_repository)) {
	perform_reachability_traversal(&revs);
	prune_shallow(show_only ? PRUNE_SHOW_ONLY : 0);
	}

	return 0;
	}