fix(dir): check selenium dir and warn user that the folder does not e…

…xist (#17)

closes #11

lib/cmds/start.ts

@@ -1,3 +1,4 @@
+import * as fs from 'fs';
 import * as minimist from 'minimist';
 import * as path from 'path';
 import * as os from 'os';
@@ -51,6 +52,16 @@ function start(options: Options) {
  outputDir = path.resolve(Config.getBaseDir(), options[Opt.OUT_DIR].getString());
  }
  }
+
+ try {
+ // check if folder exists
+ fs.statSync(outputDir).isDirectory();
+ } catch (e) {
+ // if the folder does not exist, quit early.
+ logger.warn('the out_dir path ' + outputDir + ' does not exist, run webdriver-manager update');
+ return;
+ }
+
  let chromeLogs: string = null;
  if (options[Opt.CHROME_LOGS].getString()) {
  if (path.isAbsolute(options[Opt.CHROME_LOGS].getString())) {

lib/cmds/status.ts

@@ -1,3 +1,4 @@
+import * as fs from 'fs';
 import * as minimist from 'minimist';
 import * as path from 'path';
 
@@ -37,6 +38,17 @@ function status(options: Options) {
  outputDir = path.resolve(Config.getBaseDir(), options[Opt.OUT_DIR].getString());
  }
  }
+
+ try {
+ // check if folder exists
+ fs.statSync(outputDir).isDirectory();
+ } catch (e) {
+ // if the folder does not exist, quit early.
+ logger.warn('the out_dir path ' + outputDir + ' does not exist');
+ return;
+ }
+
+
  let downloadedBinaries = FileManager.downloadedBinaries(outputDir);
  // log which binaries have been downloaded
  for (let bin in downloadedBinaries) {

lib/files/file_manager.ts

@@ -70,7 +70,13 @@ export class FileManager {
  * @param outputDir The directory where binaries are saved
  * @returns A list of existing files.
  */
- static getExistngFiles(outputDir: string): string[] { return fs.readdirSync(outputDir); }
+ static getExistngFiles(outputDir: string): string[] {
+ try {
+ return fs.readdirSync(outputDir);
+ } catch (e) {
+ return [];
+ }
+ }
 
  /**
  * For the binary, operating system, and system architecture, look through