feat(cli): create output folder if it doesn't exist

fix #9

.gitignore

@@ -1,5 +1,6 @@
 # Automatically generated files by app
 static
+temp
 
 # Logs
 logs

.npmignore

@@ -1,5 +1,6 @@
 static/*
 !static/.gitkeep
+temp/*
 .editorconfig
 .eslintrc
 .gitattributes

cli.test.js

@@ -1,4 +1,5 @@
 const execa = require('execa');
+const file = require('./helpers/file');
 
 test('throws error when input is not provided', async () => {
   try {
@@ -8,21 +9,24 @@ test('throws error when input is not provided', async () => {
   }
 });
 
-test('throws error when wrong output is provided', async () => {
-  try {
-    await execa.sync('./cli.js', ['./static/logo.png', 'unknown_folder']);
-  } catch (e) {
-    expect(e.stderr).toContain(
-      'Make sure output folder unknown_folder exists and writable',
-    );
-  }
+test('creates an output folder when output path does not exist', async () => {
+  jest.setTimeout(30000);
+  const tempFolderName = 'temp';
+  await execa.sync('./cli.js', [
+    './static/logo.png',
+    tempFolderName,
+    '-s=false',
+    '--icon-only',
+  ]);
+  expect(await file.pathExists(tempFolderName)).toBe(true);
 });
 
 test('creates images', async () => {
   jest.setTimeout(30000);
   let flags = `
     --background="rgba(255, 255, 255, .5)"
     --scrape=false
+    --icon-only
     `;
 
   flags = flags

helpers/file.js

@@ -65,6 +65,18 @@ const pathExists = (filePath, mode) => {
   });
 };
 
+const makeDir = folderPath => {
+  return new Promise((resolve, reject) => {
+    fs.mkdir(folderPath, { recursive: true }, err => {
+      if (err) {
+        return reject(err);
+      }
+
+      return resolve();
+    });
+  });
+};
+
 const readFile = (filePath, options) => {
   return new Promise((resolve, reject) => {
     fs.readFile(filePath, options, (err, data) => {
@@ -134,6 +146,7 @@ module.exports = {
   getExtension,
   readFile,
   writeFile,
+  makeDir,
   READ_ACCESS: fs.constants.R_OK,
   WRITE_ACCESS: fs.constants.W_OK,
 };

puppets.js

@@ -241,6 +241,7 @@ const saveImages = async (imageList, source, output, options) => {
 };
 
 const generateImages = async (source, output, options) => {
+  const logger = preLogger(generateImages.name);
   const splashScreenMetaData = await getSplashScreenMetaData(options);
   const allImages = [
     ...(!options.iconOnly
@@ -250,7 +251,10 @@ const generateImages = async (source, output, options) => {
   ];
 
   if (!(await file.pathExists(output, file.WRITE_ACCESS))) {
-    throw Error(`Make sure output folder ${output} exists and writable`);
+    logger.warn(
+      `Looks like folder ${output} doesn't exist. Created one for you`,
+    );
+    await file.makeDir(output);
   }
 
   // Increase MaxListeners and suppress MaxListenersExceededWarning