prune --worktrees: fix expire vs worktree existence condition
[gitweb.git] / builtin / prune.c
index de43b26cfe9c7610c13e3320bdac9fa2049e4db6..86282b244758d7c248dc2829291c8b6b05a4708e 100644 (file)
@@ -31,11 +31,23 @@ static int prune_tmp_file(const char *fullpath)
        return 0;
 }
 
-static int prune_object(const char *fullpath, const unsigned char *sha1)
+static int prune_object(const unsigned char *sha1, const char *fullpath,
+                       void *data)
 {
        struct stat st;
-       if (lstat(fullpath, &st))
-               return error("Could not stat '%s'", fullpath);
+
+       /*
+        * Do we know about this object?
+        * It must have been reachable
+        */
+       if (lookup_object(sha1))
+               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) {
@@ -48,68 +60,109 @@ static int prune_object(const char *fullpath, const unsigned char *sha1)
        return 0;
 }
 
-static int prune_dir(int i, struct strbuf *path)
+static int prune_cruft(const char *basename, const char *path, void *data)
 {
-       size_t baselen = path->len;
-       DIR *dir = opendir(path->buf);
-       struct dirent *de;
+       if (starts_with(basename, "tmp_obj_"))
+               prune_tmp_file(path);
+       else
+               fprintf(stderr, "bad sha1 file: %s\n", path);
+       return 0;
+}
 
-       if (!dir)
-               return 0;
+static int prune_subdir(int nr, const char *path, void *data)
+{
+       if (!show_only)
+               rmdir(path);
+       return 0;
+}
 
-       while ((de = readdir(dir)) != NULL) {
-               char name[100];
-               unsigned char sha1[20];
+static int prune_worktree(const char *id, struct strbuf *reason)
+{
+       struct stat st;
+       char *path;
+       int fd, len;
 
-               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;
-
-                       strbuf_addf(path, "/%s", de->d_name);
-                       prune_object(path->buf, sha1);
-                       strbuf_setlen(path, baselen);
-                       continue;
-               }
-               if (starts_with(de->d_name, "tmp_obj_")) {
-                       strbuf_addf(path, "/%s", de->d_name);
-                       prune_tmp_file(path->buf);
-                       strbuf_setlen(path, baselen);
-                       continue;
+       if (!is_directory(git_path("worktrees/%s", id))) {
+               strbuf_addf(reason, _("Removing worktrees/%s: not a valid directory"), id);
+               return 1;
+       }
+       if (file_exists(git_path("worktrees/%s/locked", id)))
+               return 0;
+       if (stat(git_path("worktrees/%s/gitdir", id), &st)) {
+               strbuf_addf(reason, _("Removing worktrees/%s: gitdir file does not exist"), id);
+               return 1;
+       }
+       fd = open(git_path("worktrees/%s/gitdir", id), O_RDONLY);
+       if (fd < 0) {
+               strbuf_addf(reason, _("Removing worktrees/%s: unable to read gitdir file (%s)"),
+                           id, strerror(errno));
+               return 1;
+       }
+       len = st.st_size;
+       path = xmalloc(len + 1);
+       read_in_full(fd, path, len);
+       close(fd);
+       while (len && (path[len - 1] == '\n' || path[len - 1] == '\r'))
+               len--;
+       if (!len) {
+               strbuf_addf(reason, _("Removing worktrees/%s: invalid gitdir file"), id);
+               free(path);
+               return 1;
+       }
+       path[len] = '\0';
+       if (!file_exists(path)) {
+               struct stat st_link;
+               free(path);
+               /*
+                * the repo is moved manually and has not been
+                * accessed since?
+                */
+               if (!stat(git_path("worktrees/%s/link", id), &st_link) &&
+                   st_link.st_nlink > 1)
+                       return 0;
+               if (st.st_mtime <= expire) {
+                       strbuf_addf(reason, _("Removing worktrees/%s: gitdir file points to non-existent location"), id);
+                       return 1;
+               } else {
+                       return 0;
                }
-               fprintf(stderr, "bad sha1 file: %s/%s\n", path->buf, de->d_name);
        }
-       closedir(dir);
-       if (!show_only)
-               rmdir(path->buf);
+       free(path);
        return 0;
 }
 
-static void prune_object_dir(const char *path)
+static void prune_worktrees(void)
 {
-       struct strbuf buf = STRBUF_INIT;
-       size_t baselen;
-       int i;
-
-       strbuf_addstr(&buf, path);
-       strbuf_addch(&buf, '/');
-       baselen = buf.len;
-
-       for (i = 0; i < 256; i++) {
-               strbuf_addf(&buf, "%02x", i);
-               prune_dir(i, &buf);
-               strbuf_setlen(&buf, baselen);
+       struct strbuf reason = STRBUF_INIT;
+       struct strbuf path = STRBUF_INIT;
+       DIR *dir = opendir(git_path("worktrees"));
+       struct dirent *d;
+       int ret;
+       if (!dir)
+               return;
+       while ((d = readdir(dir)) != NULL) {
+               if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, ".."))
+                       continue;
+               strbuf_reset(&reason);
+               if (!prune_worktree(d->d_name, &reason))
+                       continue;
+               if (show_only || verbose)
+                       printf("%s\n", reason.buf);
+               if (show_only)
+                       continue;
+               strbuf_reset(&path);
+               strbuf_addstr(&path, git_path("worktrees/%s", d->d_name));
+               ret = remove_dir_recursively(&path, 0);
+               if (ret < 0 && errno == ENOTDIR)
+                       ret = unlink(path.buf);
+               if (ret)
+                       error(_("failed to remove: %s"), strerror(errno));
        }
+       closedir(dir);
+       if (!show_only)
+               rmdir(git_path("worktrees"));
+       strbuf_release(&reason);
+       strbuf_release(&path);
 }
 
 /*
@@ -138,10 +191,12 @@ int cmd_prune(int argc, const char **argv, const char *prefix)
 {
        struct rev_info revs;
        struct progress *progress = NULL;
+       int do_prune_worktrees = 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_BOOL(0, "worktrees", &do_prune_worktrees, N_("prune .git/worktrees")),
                OPT_EXPIRY_DATE(0, "expire", &expire,
                                N_("expire objects older than <time>")),
                OPT_END()
@@ -150,10 +205,18 @@ int cmd_prune(int argc, const char **argv, const char *prefix)
 
        expire = ULONG_MAX;
        save_commit_buffer = 0;
-       read_replace_refs = 0;
+       check_replace_refs = 0;
        init_revisions(&revs, prefix);
 
        argc = parse_options(argc, argv, prefix, options, prune_usage, 0);
+
+       if (do_prune_worktrees) {
+               if (argc)
+                       die(_("--worktrees does not take extra arguments"));
+               prune_worktrees();
+               return 0;
+       }
+
        while (argc--) {
                unsigned char sha1[20];
                const char *name = *argv++;
@@ -169,11 +232,12 @@ int cmd_prune(int argc, const char **argv, const char *prefix)
        if (show_progress == -1)
                show_progress = isatty(2);
        if (show_progress)
-               progress = start_progress_delay("Checking connectivity", 0, 0, 2);
+               progress = start_progress_delay(_("Checking connectivity"), 0, 0, 2);
 
-       mark_reachable_objects(&revs, 1, progress);
+       mark_reachable_objects(&revs, 1, expire, progress);
        stop_progress(&progress);
-       prune_object_dir(get_object_directory());
+       for_each_loose_file_in_objdir(get_object_directory(), prune_object,
+                                     prune_cruft, prune_subdir, NULL);
 
        prune_packed_objects(show_only ? PRUNE_PACKED_DRY_RUN : 0);
        remove_temporary_files(get_object_directory());