#include "strbuf.h"
#include "worktree.h"
-static char *find_linked_symref(const char *symref, const char *branch,
- const char *id)
+void free_worktrees(struct worktree **worktrees)
{
- struct strbuf sb = STRBUF_INIT;
+ 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).
+ *
+ * $GIT_COMMON_DIR/$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
+ */
+static void add_head_info(struct strbuf *head_ref, struct worktree *worktree)
+{
+ 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;
- /*
- * $GIT_COMMON_DIR/$symref (e.g. HEAD) is practically outside
- * $GIT_DIR so resolve_ref_unsafe() won't work (it uses
- * git_path). Parse the ref ourselves.
- */
- if (id)
- strbuf_addf(&path, "%s/worktrees/%s/%s", get_git_common_dir(), id, symref);
- else
- strbuf_addf(&path, "%s/%s", get_git_common_dir(), symref);
-
- if (!strbuf_readlink(&sb, path.buf, 0)) {
- if (!starts_with(sb.buf, "refs/") ||
- check_refname_format(sb.buf, 0))
- goto done;
- } else if (strbuf_read_file(&sb, path.buf, 0) >= 0 &&
- starts_with(sb.buf, "ref:")) {
- strbuf_remove(&sb, 0, strlen("ref:"));
- strbuf_trim(&sb);
- } else
- 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;
- if (id) {
- strbuf_reset(&path);
- strbuf_addf(&path, "%s/worktrees/%s/gitdir", get_git_common_dir(), id);
- if (strbuf_read_file(&gitdir, path.buf, 0) <= 0)
- goto done;
- strbuf_rtrim(&gitdir);
- } else
- 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);
+ strbuf_release(&worktree_path);
+ strbuf_release(&head_ref);
+ return worktree;
+}
- return existing;
+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 gitdir = STRBUF_INIT;
+ struct strbuf head_ref = STRBUF_INIT;
+ int is_detached = 0;
+
+ if (!id)
+ die("Missing linked worktree name");
+
+ 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/HEAD", get_git_common_dir(), id);
+
+ if (parse_ref(path.buf, &head_ref, &is_detached) < 0)
+ goto done;
+
+ 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(&gitdir);
+ 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;
- if ((existing = find_linked_symref(symref, target, NULL)))
- return existing;
+ list = xmalloc(alloc * sizeof(struct worktree *));
+
+ 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;
}