clone: add flags to override whether to perform a local clone

include/git2/clone.h

@@ -23,6 +23,12 @@
  */
 GIT_BEGIN_DECL
 
+typedef enum {
+	GIT_CLONE_LOCAL_AUTO,
+	GIT_CLONE_LOCAL,
+	GIT_CLONE_NO_LOCAL,
+} git_clone_local_t;
+
 /**
  * Clone options structure
  *
@@ -57,6 +63,7 @@ typedef struct git_clone_options {
 
 	int bare;
 	int ignore_cert_errors;
+	git_clone_local_t local;
 	const char *remote_name;
 	const char* checkout_branch;
 	git_signature *signature;

src/clone.c

@@ -347,6 +347,29 @@ cleanup:
 	return error;
 }
 
+int git_clone__should_clone_local(const char *url, git_clone_local_t local)
+{
+	const char *path;
+	int is_url;
+
+	if (local == GIT_CLONE_NO_LOCAL)
+		return false;
+
+	is_url = !git__prefixcmp(url, "file://");
+
+	if (is_url && local != GIT_CLONE_LOCAL)
+		return false;
+
+	path = url;
+	if (is_url)
+		path = url + strlen("file://");
+
+	if ((git_path_exists(path) && git_path_isdir(path)) && local != GIT_CLONE_NO_LOCAL)
+		return true;
+
+	return false;
+}
+
 int git_clone(
 	git_repository **out,
 	const char *url,
@@ -381,7 +404,7 @@ int git_clone(
 		return error;
 
 	if (!(error = create_and_configure_origin(&origin, repo, url, &options))) {
-		if (git_path_exists(url) && git_path_isdir(url)) {
+		if (git_clone__should_clone_local(url, options.local)) {
 			error = git_clone_local_into(
 				repo, origin, &options.checkout_opts,
 				options.checkout_branch, options.signature);

src/clone.h

+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+#ifndef INCLUDE_clone_h__
+#define INCLUDE_clone_h__
+
+extern int git_clone__should_clone_local(const char *url, git_clone_local_t local);
+
+#endif

tests/clone/local.c

+#include "clar_libgit2.h"
+
+#include "git2/clone.h"
+#include "clone.h"
+#include "buffer.h"
+
+void assert_clone(const char *path, git_clone_local_t opt, int val)
+{
+	cl_assert_equal_i(val, git_clone__should_clone_local(path, opt));
+}
+
+void test_clone_local__should_clone_local(void)
+{
+	git_buf buf = GIT_BUF_INIT;
+	const char *path;
+
+	/* we use a fixture path because it needs to exist for us to want to clone */
+	
+	cl_git_pass(git_buf_printf(&buf, "file://%s", cl_fixture("testrepo.git")));
+	cl_assert_equal_i(false, git_clone__should_clone_local(buf.ptr, GIT_CLONE_LOCAL_AUTO));
+	cl_assert_equal_i(true,  git_clone__should_clone_local(buf.ptr, GIT_CLONE_LOCAL));
+	cl_assert_equal_i(false, git_clone__should_clone_local(buf.ptr, GIT_CLONE_NO_LOCAL));
+	git_buf_free(&buf);
+
+	path = cl_fixture("testrepo.git");
+	cl_assert_equal_i(true,  git_clone__should_clone_local(path, GIT_CLONE_LOCAL_AUTO));
+	cl_assert_equal_i(true,  git_clone__should_clone_local(path, GIT_CLONE_LOCAL));
+	cl_assert_equal_i(false, git_clone__should_clone_local(path, GIT_CLONE_NO_LOCAL));
+}