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-rw-r--r--builtin/prune.c203
1 files changed, 203 insertions, 0 deletions
diff --git a/builtin/prune.c b/builtin/prune.c
new file mode 100644
index 0000000..2719220
--- /dev/null
+++ b/builtin/prune.c
@@ -0,0 +1,203 @@
+#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 "prune-packed.h"
+#include "object-store.h"
+#include "shallow.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 (S_ISDIR(st.st_mode)) {
+ if (show_only || verbose)
+ printf("Removing stale temporary directory %s\n", fullpath);
+ if (!show_only) {
+ struct strbuf remove_dir_buf = STRBUF_INIT;
+
+ strbuf_addstr(&remove_dir_buf, fullpath);
+ remove_dir_recursively(&remove_dir_buf, 0);
+ strbuf_release(&remove_dir_buf);
+ }
+ } else {
+ 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) {
+ if (errno != ENOENT)
+ fprintf(stderr, "Unable to open directory %s: %s\n",
+ path, strerror(errno));
+ 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;
+ 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);
+ }
+
+ release_revisions(&revs);
+ return 0;
+}