Fix dir detection for windows

Author: jneira

src/extension.ts

@@ -108,7 +108,7 @@ function findManualExecutable(logger: Logger, uri: Uri, folder?: WorkspaceFolder
   if (!executableExists(exePath)) {
     let msg = `serverExecutablePath is set to ${exePath}`;
     if (directoryExists(exePath)) {
-      msg += ' but it is a directory and the config option should point to the executable *full* path';
+      msg += ' but it is a directory and the config option should point to the executable full path';
     } else {
       msg += " but it doesn't exist and it is not on the PATH";
     }

src/utils.ts

@@ -260,13 +260,17 @@ export function executableExists(exe: string): boolean {
   const isWindows = process.platform === 'win32';
   const cmd: string = isWindows ? 'where' : 'which';
   const out = child_process.spawnSync(cmd, [exe]);
-  return out.status === 0 || (isWindows && fs.existsSync(exe));
+  return out.status === 0 || (isWindows && fileExists(exe));
 }
 
 export function directoryExists(path: string): boolean {
   return fs.existsSync(path) && fs.lstatSync(path).isDirectory();
 }
 
+function fileExists(path: string): boolean {
+  return fs.existsSync(path) && fs.lstatSync(path).isFile();
+}
+
 export function resolvePathPlaceHolders(path: string, folder?: WorkspaceFolder) {
   path = path.replace('${HOME}', os.homedir).replace('${home}', os.homedir).replace(/^~/, os.homedir);
   if (folder) {