dir: add remove_untracked_cache()
[gitweb.git] / worktree.c
index 3c2498ae1c3dc12f693bc92117ea7bfb82c34fbe..981f810e80008d878d6a5af1331c89dc093c5927 100644 (file)
@@ -3,6 +3,19 @@
 #include "strbuf.h"
 #include "worktree.h"
 
+void free_worktrees(struct worktree **worktrees)
+{
+       int i = 0;
+
+       for (i = 0; worktrees[i]; i++) {
+               free(worktrees[i]->path);
+               free(worktrees[i]->git_dir);
+               free(worktrees[i]->head_ref);
+               free(worktrees[i]);
+       }
+       free (worktrees);
+}
+
 /*
  * read 'path_to_ref' into 'ref'.  Also if is_detached is not NULL,
  * set is_detached to 1 (0) if the ref is detatched (is not detached).
@@ -38,87 +51,169 @@ static int parse_ref(char *path_to_ref, struct strbuf *ref, int *is_detached)
        return 0;
 }
 
-static char *find_main_symref(const char *symref, const char *branch)
+/**
+ * Add the head_sha1 and head_ref (if not detached) to the given worktree
+ */
+static void add_head_info(struct strbuf *head_ref, struct worktree *worktree)
 {
-       struct strbuf sb = STRBUF_INIT;
+       if (head_ref->len) {
+               if (worktree->is_detached) {
+                       get_sha1_hex(head_ref->buf, worktree->head_sha1);
+               } else {
+                       resolve_ref_unsafe(head_ref->buf, 0, worktree->head_sha1, NULL);
+                       worktree->head_ref = strbuf_detach(head_ref, NULL);
+               }
+       }
+}
+
+/**
+ * get the main worktree
+ */
+static struct worktree *get_main_worktree(void)
+{
+       struct worktree *worktree = NULL;
        struct strbuf path = STRBUF_INIT;
+       struct strbuf worktree_path = STRBUF_INIT;
        struct strbuf gitdir = STRBUF_INIT;
-       char *existing = NULL;
+       struct strbuf head_ref = STRBUF_INIT;
+       int is_bare = 0;
+       int is_detached = 0;
 
-       strbuf_addf(&path, "%s/%s", get_git_common_dir(), symref);
-       if (parse_ref(path.buf, &sb, NULL) < 0)
-               goto done;
-       if (strcmp(sb.buf, branch))
+       strbuf_addf(&gitdir, "%s", absolute_path(get_git_common_dir()));
+       strbuf_addbuf(&worktree_path, &gitdir);
+       is_bare = !strbuf_strip_suffix(&worktree_path, "/.git");
+       if (is_bare)
+               strbuf_strip_suffix(&worktree_path, "/.");
+
+       strbuf_addf(&path, "%s/HEAD", get_git_common_dir());
+
+       if (parse_ref(path.buf, &head_ref, &is_detached) < 0)
                goto done;
-       strbuf_addstr(&gitdir, get_git_common_dir());
-       strbuf_strip_suffix(&gitdir, ".git");
-       existing = strbuf_detach(&gitdir, NULL);
+
+       worktree = xmalloc(sizeof(struct worktree));
+       worktree->path = strbuf_detach(&worktree_path, NULL);
+       worktree->git_dir = strbuf_detach(&gitdir, NULL);
+       worktree->is_bare = is_bare;
+       worktree->head_ref = NULL;
+       worktree->is_detached = is_detached;
+       add_head_info(&head_ref, worktree);
+
 done:
        strbuf_release(&path);
-       strbuf_release(&sb);
        strbuf_release(&gitdir);
-
-       return existing;
+       strbuf_release(&worktree_path);
+       strbuf_release(&head_ref);
+       return worktree;
 }
 
-static char *find_linked_symref(const char *symref, const char *branch,
-                               const char *id)
+static struct worktree *get_linked_worktree(const char *id)
 {
-       struct strbuf sb = STRBUF_INIT;
+       struct worktree *worktree = NULL;
        struct strbuf path = STRBUF_INIT;
+       struct strbuf worktree_path = STRBUF_INIT;
        struct strbuf gitdir = STRBUF_INIT;
-       char *existing = NULL;
+       struct strbuf head_ref = STRBUF_INIT;
+       int is_detached = 0;
 
        if (!id)
                die("Missing linked worktree name");
 
-       strbuf_addf(&path, "%s/worktrees/%s/%s", get_git_common_dir(), id, symref);
-
-       if (parse_ref(path.buf, &sb, NULL) < 0)
-               goto done;
-       if (strcmp(sb.buf, branch))
+       strbuf_addf(&gitdir, "%s/worktrees/%s",
+                       absolute_path(get_git_common_dir()), id);
+       strbuf_addf(&path, "%s/gitdir", gitdir.buf);
+       if (strbuf_read_file(&worktree_path, path.buf, 0) <= 0)
+               /* invalid gitdir file */
                goto done;
+
+       strbuf_rtrim(&worktree_path);
+       if (!strbuf_strip_suffix(&worktree_path, "/.git")) {
+               strbuf_reset(&worktree_path);
+               strbuf_addstr(&worktree_path, absolute_path("."));
+               strbuf_strip_suffix(&worktree_path, "/.");
+       }
+
        strbuf_reset(&path);
-       strbuf_addf(&path, "%s/worktrees/%s/gitdir", get_git_common_dir(), id);
-       if (strbuf_read_file(&gitdir, path.buf, 0) <= 0)
+       strbuf_addf(&path, "%s/worktrees/%s/HEAD", get_git_common_dir(), id);
+
+       if (parse_ref(path.buf, &head_ref, &is_detached) < 0)
                goto done;
-       strbuf_rtrim(&gitdir);
-       strbuf_strip_suffix(&gitdir, ".git");
 
-       existing = strbuf_detach(&gitdir, NULL);
+       worktree = xmalloc(sizeof(struct worktree));
+       worktree->path = strbuf_detach(&worktree_path, NULL);
+       worktree->git_dir = strbuf_detach(&gitdir, NULL);
+       worktree->is_bare = 0;
+       worktree->head_ref = NULL;
+       worktree->is_detached = is_detached;
+       add_head_info(&head_ref, worktree);
+
 done:
        strbuf_release(&path);
-       strbuf_release(&sb);
        strbuf_release(&gitdir);
-
-       return existing;
+       strbuf_release(&worktree_path);
+       strbuf_release(&head_ref);
+       return worktree;
 }
 
-char *find_shared_symref(const char *symref, const char *target)
+struct worktree **get_worktrees(void)
 {
+       struct worktree **list = NULL;
        struct strbuf path = STRBUF_INIT;
        DIR *dir;
        struct dirent *d;
-       char *existing;
+       int counter = 0, alloc = 2;
+
+       list = xmalloc(alloc * sizeof(struct worktree *));
 
-       if ((existing = find_main_symref(symref, target)))
-               return existing;
+       if ((list[counter] = get_main_worktree()))
+               counter++;
 
        strbuf_addf(&path, "%s/worktrees", get_git_common_dir());
        dir = opendir(path.buf);
        strbuf_release(&path);
-       if (!dir)
-               return NULL;
+       if (dir) {
+               while ((d = readdir(dir)) != NULL) {
+                       struct worktree *linked = NULL;
+                       if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, ".."))
+                               continue;
 
-       while ((d = readdir(dir)) != NULL) {
-               if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, ".."))
+                               if ((linked = get_linked_worktree(d->d_name))) {
+                                       ALLOC_GROW(list, counter + 1, alloc);
+                                       list[counter++] = linked;
+                               }
+               }
+               closedir(dir);
+       }
+       ALLOC_GROW(list, counter + 1, alloc);
+       list[counter] = NULL;
+       return list;
+}
+
+char *find_shared_symref(const char *symref, const char *target)
+{
+       char *existing = NULL;
+       struct strbuf path = STRBUF_INIT;
+       struct strbuf sb = STRBUF_INIT;
+       struct worktree **worktrees = get_worktrees();
+       int i = 0;
+
+       for (i = 0; worktrees[i]; i++) {
+               strbuf_reset(&path);
+               strbuf_reset(&sb);
+               strbuf_addf(&path, "%s/%s", worktrees[i]->git_dir, symref);
+
+               if (parse_ref(path.buf, &sb, NULL)) {
                        continue;
-               existing = find_linked_symref(symref, target, d->d_name);
-               if (existing)
-                       goto done;
+               }
+
+               if (!strcmp(sb.buf, target)) {
+                       existing = xstrdup(worktrees[i]->path);
+                       break;
+               }
        }
-done:
-       closedir(dir);
+
+       strbuf_release(&path);
+       strbuf_release(&sb);
+       free_worktrees(worktrees);
 
        return existing;
 }