git-remote-mediawiki: obey advice.pushNonFastForward

diff --git a/rerere.c b/rerere.c
index 22dfc843da1528ffd0466d496c50c56702e55a24..dcb525a4d03faeba53d108d2e175a6d04f99d160 100644 (file)
--- a/rerere.c
+++ b/rerere.c
@@ -47,8 +47,14 @@ static void read_rr(struct string_list *rr)
                name = xstrdup(buf);
                if (fgetc(in) != '\t')
                        die("corrupt MERGE_RR");
-               for (i = 0; i < sizeof(buf) && (buf[i] = fgetc(in)); i++)
-                       ; /* do nothing */
+               for (i = 0; i < sizeof(buf); i++) {
+                       int c = fgetc(in);
+                       if (c < 0)
+                               die("corrupt MERGE_RR");
+                       buf[i] = c;
+                       if (c == 0)
+                                break;
+               }
                if (i == sizeof(buf))
                        die("filename too long");
                string_list_insert(rr, buf)->util = name;
@@ -671,3 +677,88 @@ int rerere_forget(const char **pathspec)
        }
        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"));
+}