Merge branch 'km/log-showsignature-doc'
[gitweb.git] / worktree.c
index 0486e31ad4a5f5ee02813d06bf9a48e48e3667cb..2801c6d52bdaa1fb83a0069c8d2217ea129fd6bf 100644 (file)
@@ -19,54 +19,25 @@ void free_worktrees(struct worktree **worktrees)
        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 detached (is not detached).
- *
- * $GIT_COMMON_DIR/$symref (e.g. HEAD) is practically outside $GIT_DIR so
- * for linked worktrees, `resolve_ref_unsafe()` won't work (it uses
- * git_path). Parse the ref ourselves.
- *
- * return -1 if the ref is not a proper ref, 0 otherwise (success)
- */
-static int parse_ref(char *path_to_ref, struct strbuf *ref, int *is_detached)
-{
-       if (is_detached)
-               *is_detached = 0;
-       if (!strbuf_readlink(ref, path_to_ref, 0)) {
-               /* HEAD is symbolic link */
-               if (!starts_with(ref->buf, "refs/") ||
-                               check_refname_format(ref->buf, 0))
-                       return -1;
-       } else if (strbuf_read_file(ref, path_to_ref, 0) >= 0) {
-               /* textual symref or detached */
-               if (!starts_with(ref->buf, "ref:")) {
-                       if (is_detached)
-                               *is_detached = 1;
-               } else {
-                       strbuf_remove(ref, 0, strlen("ref:"));
-                       strbuf_trim(ref);
-                       if (check_refname_format(ref->buf, 0))
-                               return -1;
-               }
-       } else
-               return -1;
-       return 0;
-}
-
 /**
- * Add the head_sha1 and head_ref (if not detached) to the given worktree
+ * Update head_sha1, head_ref and is_detached of the given worktree
  */
-static void add_head_info(struct strbuf *head_ref, struct worktree *worktree)
+static void add_head_info(struct worktree *wt)
 {
-       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);
-               }
-       }
+       int flags;
+       const char *target;
+
+       target = refs_resolve_ref_unsafe(get_worktree_ref_store(wt),
+                                        "HEAD",
+                                        RESOLVE_REF_READING,
+                                        wt->head_sha1, &flags);
+       if (!target)
+               return;
+
+       if (flags & REF_ISSYMREF)
+               wt->head_ref = xstrdup(target);
+       else
+               wt->is_detached = 1;
 }
 
 /**
@@ -77,9 +48,7 @@ static struct worktree *get_main_worktree(void)
        struct worktree *worktree = NULL;
        struct strbuf path = STRBUF_INIT;
        struct strbuf worktree_path = STRBUF_INIT;
-       struct strbuf head_ref = STRBUF_INIT;
        int is_bare = 0;
-       int is_detached = 0;
 
        strbuf_add_absolute_path(&worktree_path, get_git_common_dir());
        is_bare = !strbuf_strip_suffix(&worktree_path, "/.git");
@@ -91,13 +60,10 @@ static struct worktree *get_main_worktree(void)
        worktree = xcalloc(1, sizeof(*worktree));
        worktree->path = strbuf_detach(&worktree_path, NULL);
        worktree->is_bare = is_bare;
-       worktree->is_detached = is_detached;
-       if (!parse_ref(path.buf, &head_ref, &is_detached))
-               add_head_info(&head_ref, worktree);
+       add_head_info(worktree);
 
        strbuf_release(&path);
        strbuf_release(&worktree_path);
-       strbuf_release(&head_ref);
        return worktree;
 }
 
@@ -106,8 +72,6 @@ static struct worktree *get_linked_worktree(const char *id)
        struct worktree *worktree = NULL;
        struct strbuf path = STRBUF_INIT;
        struct strbuf worktree_path = STRBUF_INIT;
-       struct strbuf head_ref = STRBUF_INIT;
-       int is_detached = 0;
 
        if (!id)
                die("Missing linked worktree name");
@@ -127,19 +91,14 @@ static struct worktree *get_linked_worktree(const char *id)
        strbuf_reset(&path);
        strbuf_addf(&path, "%s/worktrees/%s/HEAD", get_git_common_dir(), id);
 
-       if (parse_ref(path.buf, &head_ref, &is_detached) < 0)
-               goto done;
-
        worktree = xcalloc(1, sizeof(*worktree));
        worktree->path = strbuf_detach(&worktree_path, NULL);
        worktree->id = xstrdup(id);
-       worktree->is_detached = is_detached;
-       add_head_info(&head_ref, worktree);
+       add_head_info(worktree);
 
 done:
        strbuf_release(&path);
        strbuf_release(&worktree_path);
-       strbuf_release(&head_ref);
        return worktree;
 }
 
@@ -175,7 +134,7 @@ struct worktree **get_worktrees(unsigned flags)
        struct dirent *d;
        int counter = 0, alloc = 2;
 
-       list = xmalloc(alloc * sizeof(struct worktree *));
+       ALLOC_ARRAY(list, alloc);
 
        list[counter++] = get_main_worktree();
 
@@ -250,16 +209,19 @@ struct worktree *find_worktree(struct worktree **list,
 {
        struct worktree *wt;
        char *path;
+       char *to_free = NULL;
 
        if ((wt = find_worktree_by_suffix(list, arg)))
                return wt;
 
-       arg = prefix_filename(prefix, strlen(prefix), arg);
+       if (prefix)
+               arg = to_free = prefix_filename(prefix, arg);
        path = real_pathdup(arg, 1);
        for (; *list; list++)
                if (!fspathcmp(path, real_path((*list)->path)))
                        break;
        free(path);
+       free(to_free);
        return *list;
 }
 
@@ -334,8 +296,6 @@ const struct worktree *find_shared_symref(const char *symref,
                                          const char *target)
 {
        const struct worktree *existing = NULL;
-       struct strbuf path = STRBUF_INIT;
-       struct strbuf sb = STRBUF_INIT;
        static struct worktree **worktrees;
        int i = 0;
 
@@ -345,6 +305,11 @@ const struct worktree *find_shared_symref(const char *symref,
 
        for (i = 0; worktrees[i]; i++) {
                struct worktree *wt = worktrees[i];
+               const char *symref_target;
+               unsigned char sha1[20];
+               struct ref_store *refs;
+               int flags;
+
                if (wt->is_bare)
                        continue;
 
@@ -359,25 +324,15 @@ const struct worktree *find_shared_symref(const char *symref,
                        }
                }
 
-               strbuf_reset(&path);
-               strbuf_reset(&sb);
-               strbuf_addf(&path, "%s/%s",
-                           get_worktree_git_dir(wt),
-                           symref);
-
-               if (parse_ref(path.buf, &sb, NULL)) {
-                       continue;
-               }
-
-               if (!strcmp(sb.buf, target)) {
+               refs = get_worktree_ref_store(wt);
+               symref_target = refs_resolve_ref_unsafe(refs, symref, 0,
+                                                       sha1, &flags);
+               if ((flags & REF_ISSYMREF) && !strcmp(symref_target, target)) {
                        existing = wt;
                        break;
                }
        }
 
-       strbuf_release(&path);
-       strbuf_release(&sb);
-
        return existing;
 }
 
@@ -396,6 +351,7 @@ int submodule_uses_worktrees(const char *path)
 
        /* The env would be set for the superproject. */
        get_common_dir_noenv(&sb, submodule_gitdir);
+       free(submodule_gitdir);
 
        /*
         * The check below is only known to be good for repository format
@@ -415,7 +371,6 @@ int submodule_uses_worktrees(const char *path)
        /* See if there is any file inside the worktrees directory. */
        dir = opendir(sb.buf);
        strbuf_release(&sb);
-       free(submodule_gitdir);
 
        if (!dir)
                return 0;