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-rw-r--r--builtin/prune.c164
1 files changed, 164 insertions, 0 deletions
diff --git a/builtin/prune.c b/builtin/prune.c
new file mode 100644
index 0000000..e65690b
--- /dev/null
+++ b/builtin/prune.c
@@ -0,0 +1,164 @@
+#include "cache.h"
+#include "commit.h"
+#include "diff.h"
+#include "revision.h"
+#include "builtin.h"
+#include "reachable.h"
+#include "parse-options.h"
+#include "dir.h"
+
+static const char * const prune_usage[] = {
+ "git prune [-n] [-v] [--expire <time>] [--] [<head>...]",
+ NULL
+};
+static int show_only;
+static int verbose;
+static unsigned long expire;
+
+static int prune_tmp_object(const char *path, const char *filename)
+{
+ const char *fullpath = mkpath("%s/%s", path, filename);
+ 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_or_warn(fullpath);
+ return 0;
+}
+
+static int prune_object(char *path, const char *filename, const unsigned char *sha1)
+{
+ const char *fullpath = mkpath("%s/%s", path, filename);
+ 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, 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];
+
+ 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;
+
+ 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 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 (!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__DRY_RUN(&show_only, "do not remove, show only"),
+ OPT__VERBOSE(&verbose, "report pruned objects"),
+ OPT_DATE(0, "expire", &expire,
+ "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(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;
+}