1 files changed, 92 insertions, 0 deletions
diff --git a/worktree.h b/worktree.h
new file mode 100644
index 0000000000..9276c81ae7
--- /dev/null
+++ b/worktree.h
@@ -0,0 +1,92 @@
+#ifndef WORKTREE_H
+#define WORKTREE_H
+
+#include "refs.h"
+
+struct worktree {
+	char *path;
+	char *id;
+	char *head_ref;		/* NULL if HEAD is broken or detached */
+	char *lock_reason;	/* internal use */
+	unsigned char head_sha1[20];
+	int is_detached;
+	int is_bare;
+	int is_current;
+	int lock_reason_valid;
+};
+
+/* Functions for acting on the information about worktrees. */
+
+#define GWT_SORT_LINKED (1 << 0) /* keeps linked worktrees sorted */
+
+/*
+ * Get the worktrees.  The primary worktree will always be the first returned,
+ * and linked worktrees will be pointed to by 'next' in each subsequent
+ * worktree.  No specific ordering is done on the linked worktrees.
+ *
+ * The caller is responsible for freeing the memory from the returned
+ * worktree(s).
+ */
+extern struct worktree **get_worktrees(unsigned flags);
+
+/*
+ * Returns 1 if linked worktrees exist, 0 otherwise.
+ */
+extern int submodule_uses_worktrees(const char *path);
+
+/*
+ * Return git dir of the worktree. Note that the path may be relative.
+ * If wt is NULL, git dir of current worktree is returned.
+ */
+extern const char *get_worktree_git_dir(const struct worktree *wt);
+
+/*
+ * Search a worktree that can be unambiguously identified by
+ * "arg". "prefix" must not be NULL.
+ */
+extern struct worktree *find_worktree(struct worktree **list,
+				      const char *prefix,
+				      const char *arg);
+
+/*
+ * Return true if the given worktree is the main one.
+ */
+extern int is_main_worktree(const struct worktree *wt);
+
+/*
+ * Return the reason string if the given worktree is locked or NULL
+ * otherwise.
+ */
+extern const char *is_worktree_locked(struct worktree *wt);
+
+/*
+ * Free up the memory for worktree(s)
+ */
+extern void free_worktrees(struct worktree **);
+
+/*
+ * Check if a per-worktree symref points to a ref in the main worktree
+ * or any linked worktree, and return the worktree that holds the ref,
+ * or NULL otherwise. The result may be destroyed by the next call.
+ */
+extern const struct worktree *find_shared_symref(const char *symref,
+						 const char *target);
+
+/*
+ * Similar to head_ref() for all HEADs _except_ one from the current
+ * worktree, which is covered by head_ref().
+ */
+int other_head_refs(each_ref_fn fn, void *cb_data);
+
+int is_worktree_being_rebased(const struct worktree *wt, const char *target);
+int is_worktree_being_bisected(const struct worktree *wt, const char *target);
+
+/*
+ * Similar to git_path() but can produce paths for a specified
+ * worktree instead of current one
+ */
+extern const char *worktree_git_path(const struct worktree *wt,
+				     const char *fmt, ...)
+	__attribute__((format (printf, 2, 3)));
+
+#endif