1 files changed, 199 insertions, 0 deletions
diff --git a/third_party/git/path.h b/third_party/git/path.h
new file mode 100644
index 000000000000..14d6dcad161e
--- /dev/null
+++ b/third_party/git/path.h
@@ -0,0 +1,199 @@
+#ifndef PATH_H
+#define PATH_H
+
+struct repository;
+struct strbuf;
+
+/*
+ * The result to all functions which return statically allocated memory may be
+ * overwritten by another call to _any_ one of these functions. Consider using
+ * the safer variants which operate on strbufs or return allocated memory.
+ */
+
+/*
+ * Return a statically allocated path.
+ */
+const char *mkpath(const char *fmt, ...)
+	__attribute__((format (printf, 1, 2)));
+
+/*
+ * Return a path.
+ */
+char *mkpathdup(const char *fmt, ...)
+	__attribute__((format (printf, 1, 2)));
+
+/*
+ * Construct a path and place the result in the provided buffer `buf`.
+ */
+char *mksnpath(char *buf, size_t n, const char *fmt, ...)
+	__attribute__((format (printf, 3, 4)));
+
+/*
+ * The `git_common_path` family of functions will construct a path into a
+ * repository's common git directory, which is shared by all worktrees.
+ */
+
+/*
+ * Constructs a path into the common git directory of repository `repo` and
+ * append it in the provided buffer `sb`.
+ */
+void strbuf_git_common_path(struct strbuf *sb,
+			    const struct repository *repo,
+			    const char *fmt, ...)
+	__attribute__((format (printf, 3, 4)));
+
+/*
+ * Return a statically allocated path into the main repository's
+ * (the_repository) common git directory.
+ */
+const char *git_common_path(const char *fmt, ...)
+	__attribute__((format (printf, 1, 2)));
+
+
+/*
+ * The `git_path` family of functions will construct a path into a repository's
+ * git directory.
+ *
+ * These functions will perform adjustments to the resultant path to account
+ * for special paths which are either considered common among worktrees (e.g.
+ * paths into the object directory) or have been explicitly set via an
+ * environment variable or config (e.g. path to the index file).
+ *
+ * For an exhaustive list of the adjustments made look at `common_list` and
+ * `adjust_git_path` in path.c.
+ */
+
+/*
+ * Return a path into the git directory of repository `repo`.
+ */
+char *repo_git_path(const struct repository *repo,
+		    const char *fmt, ...)
+	__attribute__((format (printf, 2, 3)));
+
+/*
+ * Construct a path into the git directory of repository `repo` and append it
+ * to the provided buffer `sb`.
+ */
+void strbuf_repo_git_path(struct strbuf *sb,
+			  const struct repository *repo,
+			  const char *fmt, ...)
+	__attribute__((format (printf, 3, 4)));
+
+/*
+ * Return a statically allocated path into the main repository's
+ * (the_repository) git directory.
+ */
+const char *git_path(const char *fmt, ...)
+	__attribute__((format (printf, 1, 2)));
+
+/*
+ * Return a path into the main repository's (the_repository) git directory.
+ */
+char *git_pathdup(const char *fmt, ...)
+	__attribute__((format (printf, 1, 2)));
+
+/*
+ * Construct a path into the main repository's (the_repository) git directory
+ * and place it in the provided buffer `buf`, the contents of the buffer will
+ * be overridden.
+ */
+char *git_path_buf(struct strbuf *buf, const char *fmt, ...)
+	__attribute__((format (printf, 2, 3)));
+
+/*
+ * Construct a path into the main repository's (the_repository) git directory
+ * and append it to the provided buffer `sb`.
+ */
+void strbuf_git_path(struct strbuf *sb, const char *fmt, ...)
+	__attribute__((format (printf, 2, 3)));
+
+/*
+ * Return a path into the worktree of repository `repo`.
+ *
+ * If the repository doesn't have a worktree NULL is returned.
+ */
+char *repo_worktree_path(const struct repository *repo,
+				const char *fmt, ...)
+	__attribute__((format (printf, 2, 3)));
+
+/*
+ * Construct a path into the worktree of repository `repo` and append it
+ * to the provided buffer `sb`.
+ *
+ * If the repository doesn't have a worktree nothing will be appended to `sb`.
+ */
+void strbuf_repo_worktree_path(struct strbuf *sb,
+				      const struct repository *repo,
+				      const char *fmt, ...)
+	__attribute__((format (printf, 3, 4)));
+
+/*
+ * Return a path into a submodule's git directory located at `path`.  `path`
+ * must only reference a submodule of the main repository (the_repository).
+ */
+char *git_pathdup_submodule(const char *path, const char *fmt, ...)
+	__attribute__((format (printf, 2, 3)));
+
+/*
+ * Construct a path into a submodule's git directory located at `path` and
+ * append it to the provided buffer `sb`.  `path` must only reference a
+ * submodule of the main repository (the_repository).
+ */
+int strbuf_git_path_submodule(struct strbuf *sb, const char *path,
+				     const char *fmt, ...)
+	__attribute__((format (printf, 3, 4)));
+
+void report_linked_checkout_garbage(void);
+
+/*
+ * You can define a static memoized git path like:
+ *
+ *    static GIT_PATH_FUNC(git_path_foo, "FOO")
+ *
+ * or use one of the global ones below.
+ */
+#define GIT_PATH_FUNC(func, filename) \
+	const char *func(void) \
+	{ \
+		static char *ret; \
+		if (!ret) \
+			ret = git_pathdup(filename); \
+		return ret; \
+	}
+
+#define REPO_GIT_PATH_FUNC(var, filename) \
+	const char *git_path_##var(struct repository *r) \
+	{ \
+		if (!r->cached_paths.var) \
+			r->cached_paths.var = repo_git_path(r, filename); \
+		return r->cached_paths.var; \
+	}
+
+struct path_cache {
+	const char *cherry_pick_head;
+	const char *revert_head;
+	const char *squash_msg;
+	const char *merge_msg;
+	const char *merge_rr;
+	const char *merge_mode;
+	const char *merge_head;
+	const char *fetch_head;
+	const char *shallow;
+};
+
+#define PATH_CACHE_INIT { NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL }
+
+const char *git_path_cherry_pick_head(struct repository *r);
+const char *git_path_revert_head(struct repository *r);
+const char *git_path_squash_msg(struct repository *r);
+const char *git_path_merge_msg(struct repository *r);
+const char *git_path_merge_rr(struct repository *r);
+const char *git_path_merge_mode(struct repository *r);
+const char *git_path_merge_head(struct repository *r);
+const char *git_path_fetch_head(struct repository *r);
+const char *git_path_shallow(struct repository *r);
+
+
+int ends_with_path_components(const char *path, const char *components);
+
+#endif /* PATH_H */