}
return write_rr(&merge_rr, fd);
}
+
+static time_t rerere_created_at(const char *name)
+{
+ struct stat st;
+ return stat(rerere_path(name, "preimage"), &st) ? (time_t) 0 : st.st_mtime;
+}
+
+static time_t rerere_last_used_at(const char *name)
+{
+ struct stat st;
+ return stat(rerere_path(name, "postimage"), &st) ? (time_t) 0 : st.st_mtime;
+}
+
+static void unlink_rr_item(const char *name)
+{
+ unlink(rerere_path(name, "thisimage"));
+ unlink(rerere_path(name, "preimage"));
+ unlink(rerere_path(name, "postimage"));
+ rmdir(git_path("rr-cache/%s", name));
+}
+
+struct rerere_gc_config_cb {
+ int cutoff_noresolve;
+ int cutoff_resolve;
+};
+
+static int git_rerere_gc_config(const char *var, const char *value, void *cb)
+{
+ struct rerere_gc_config_cb *cf = cb;
+
+ if (!strcmp(var, "gc.rerereresolved"))
+ cf->cutoff_resolve = git_config_int(var, value);
+ else if (!strcmp(var, "gc.rerereunresolved"))
+ cf->cutoff_noresolve = git_config_int(var, value);
+ else
+ return git_default_config(var, value, cb);
+ return 0;
+}
+
+void rerere_gc(struct string_list *rr)
+{
+ struct string_list to_remove = STRING_LIST_INIT_DUP;
+ DIR *dir;
+ struct dirent *e;
+ int i, cutoff;
+ time_t now = time(NULL), then;
+ struct rerere_gc_config_cb cf = { 15, 60 };
+
+ git_config(git_rerere_gc_config, &cf);
+ dir = opendir(git_path("rr-cache"));
+ if (!dir)
+ die_errno("unable to open rr-cache directory");
+ while ((e = readdir(dir))) {
+ if (is_dot_or_dotdot(e->d_name))
+ continue;
+
+ then = rerere_last_used_at(e->d_name);
+ if (then) {
+ cutoff = cf.cutoff_resolve;
+ } else {
+ then = rerere_created_at(e->d_name);
+ if (!then)
+ continue;
+ cutoff = cf.cutoff_noresolve;
+ }
+ if (then < now - cutoff * 86400)
+ string_list_append(&to_remove, e->d_name);
+ }
+ closedir(dir);
+ for (i = 0; i < to_remove.nr; i++)
+ unlink_rr_item(to_remove.items[i].string);
+ string_list_clear(&to_remove, 0);
+}
+
+void rerere_clear(struct string_list *merge_rr)
+{
+ int i;
+
+ for (i = 0; i < merge_rr->nr; i++) {
+ const char *name = (const char *)merge_rr->items[i].util;
+ if (!has_rerere_resolution(name))
+ unlink_rr_item(name);
+ }
+ unlink_or_warn(git_path("MERGE_RR"));
+}