fix: fix git repository detection

lib/setup-repository.js

@@ -1,15 +1,17 @@
 "use strict";
 
 const isObject          = require("es5-ext/object/is-object")
+    , { resolve }       = require("path")
     , log               = require("log4").get("npm-cross-link")
     , isDirectory       = require("fs2/is-directory")
+    , rm                = require("fs2/rm")
     , NpmCrossLinkError = require("./npm-cross-link-error")
     , runProgram        = require("./run-program");
 
 module.exports = async (path, repoUrl, options = {}) => {
 	if (!isObject(options)) options = {};
 	const report = new Set();
-	if (await isDirectory(path)) {
+	if (await isDirectory(resolve(path, ".git"))) {
 		const tryPull = options.pull, tryPush = options.push;
 
 		if (!tryPull && !tryPush) return report;
@@ -57,6 +59,7 @@ module.exports = async (path, repoUrl, options = {}) => {
 		}
 		return report;
 	}
+	await rm(path, { loose: true, recursive: true, force: true });
 	log.info("clone repository %s from %s", path, repoUrl);
 	await runProgram("git", ["clone", repoUrl, path], { logger: log.levelRoot.get("git:clone") });
 	report.add("clone");