1 files changed, 162 insertions, 0 deletions
diff --git a/worktree.h b/worktree.h
new file mode 100644
index 0000000..f38e6fd
--- /dev/null
+++ b/worktree.h
@@ -0,0 +1,162 @@
+#ifndef WORKTREE_H
+#define WORKTREE_H
+
+#include "cache.h"
+#include "refs.h"
+
+struct strbuf;
+
+struct worktree {
+	char *path;
+	char *id;
+	char *head_ref;		/* NULL if HEAD is broken or detached */
+	char *lock_reason;	/* private - use worktree_lock_reason */
+	struct object_id head_oid;
+	int is_detached;
+	int is_bare;
+	int is_current;
+	int lock_reason_valid; /* private */
+};
+
+/*
+ * Get the worktrees.  The primary worktree will always be the first returned,
+ * and linked worktrees will follow in no particular order.
+ *
+ * The caller is responsible for freeing the memory from the returned
+ * worktrees by calling free_worktrees().
+ */
+struct worktree **get_worktrees(void);
+
+/*
+ * Returns 1 if linked worktrees exist, 0 otherwise.
+ */
+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.
+ */
+const char *get_worktree_git_dir(const struct worktree *wt);
+
+/*
+ * Search for the worktree identified unambiguously by `arg` -- typically
+ * supplied by the user via the command-line -- which may be a pathname or some
+ * shorthand uniquely identifying a worktree, thus making it convenient for the
+ * user to specify a worktree with minimal typing. For instance, if the last
+ * component (say, "foo") of a worktree's pathname is unique among worktrees
+ * (say, "work/foo" and "work/bar"), it can be used to identify the worktree
+ * unambiguously.
+ *
+ * `prefix` should be the `prefix` handed to top-level Git commands along with
+ * `argc` and `argv`.
+ *
+ * Return the worktree identified by `arg`, or NULL if not found.
+ */
+struct worktree *find_worktree(struct worktree **list,
+			       const char *prefix,
+			       const char *arg);
+
+/*
+ * Return the worktree corresponding to `path`, or NULL if no such worktree
+ * exists.
+ */
+struct worktree *find_worktree_by_path(struct worktree **, const char *path);
+
+/*
+ * Return true if the given worktree is the main one.
+ */
+int is_main_worktree(const struct worktree *wt);
+
+/*
+ * Return the reason string if the given worktree is locked or NULL
+ * otherwise.
+ */
+const char *worktree_lock_reason(struct worktree *wt);
+
+#define WT_VALIDATE_WORKTREE_MISSING_OK (1 << 0)
+
+/*
+ * Return zero if the worktree is in good condition. Error message is
+ * returned if "errmsg" is not NULL.
+ */
+int validate_worktree(const struct worktree *wt,
+		      struct strbuf *errmsg,
+		      unsigned flags);
+
+/*
+ * Update worktrees/xxx/gitdir with the new path.
+ */
+void update_worktree_location(struct worktree *wt,
+			      const char *path_);
+
+typedef void (* worktree_repair_fn)(int iserr, const char *path,
+				    const char *msg, void *cb_data);
+
+/*
+ * Visit each registered linked worktree and repair corruptions. For each
+ * repair made or error encountered while attempting a repair, the callback
+ * function, if non-NULL, is called with the path of the worktree and a
+ * description of the repair or error, along with the callback user-data.
+ */
+void repair_worktrees(worktree_repair_fn, void *cb_data);
+
+/*
+ * Repair administrative files corresponding to the worktree at the given path.
+ * The worktree's .git file pointing at the repository must be intact for the
+ * repair to succeed. Useful for re-associating an orphaned worktree with the
+ * repository if the worktree has been moved manually (without using "git
+ * worktree move"). For each repair made or error encountered while attempting
+ * a repair, the callback function, if non-NULL, is called with the path of the
+ * worktree and a description of the repair or error, along with the callback
+ * user-data.
+ */
+void repair_worktree_at_path(const char *, worktree_repair_fn, void *cb_data);
+
+/*
+ * Free up the memory for worktree(s)
+ */
+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.
+ */
+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
+ */
+const char *worktree_git_path(const struct worktree *wt,
+			      const char *fmt, ...)
+	__attribute__((format (printf, 2, 3)));
+
+/*
+ * Parse a worktree ref (i.e. with prefix main-worktree/ or
+ * worktrees/) and return the position of the worktree's name and
+ * length (or NULL and zero if it's main worktree), and ref.
+ *
+ * All name, name_length and ref arguments could be NULL.
+ */
+int parse_worktree_ref(const char *worktree_ref, const char **name,
+		       int *name_length, const char **ref);
+
+/*
+ * Return a refname suitable for access from the current ref store.
+ */
+void strbuf_worktree_ref(const struct worktree *wt,
+			 struct strbuf *sb,
+			 const char *refname);
+
+#endif