From 8bce0368767f0c2ad7d0700deb839962bc928d16 Mon Sep 17 00:00:00 2001
From: Naseem <naseemkullah@gmail.com>
Date: Mon, 8 Jun 2020 21:46:11 -0400
Subject: [PATCH] feat: generate .eslintignore when running init (#521)

---
 src/init.ts     | 10 +++++++++-
 test/kitchen.ts | 13 ++++++++++++-
 2 files changed, 21 insertions(+), 2 deletions(-)

diff --git a/src/init.ts b/src/init.ts
index 14294410..b7b5fa4f 100644
--- a/src/init.ts
+++ b/src/init.ts
@@ -181,6 +181,8 @@ export const ESLINT_CONFIG = {
   extends: './node_modules/gts/',
 };
 
+export const ESLINT_IGNORE = 'build/\n';
+
 async function generateConfigFile(
   options: Options,
   filename: string,
@@ -227,6 +229,10 @@ async function generateESLintConfig(options: Options): Promise<void> {
   );
 }
 
+async function generateESLintIgnore(options: Options): Promise<void> {
+  return generateConfigFile(options, './.eslintignore', ESLINT_IGNORE);
+}
+
 async function generateTsConfig(options: Options): Promise<void> {
   const config = formatJson({
     extends: './node_modules/gts/tsconfig-google.json',
@@ -239,7 +245,8 @@ async function generateTsConfig(options: Options): Promise<void> {
 async function generatePrettierConfig(options: Options): Promise<void> {
   const style = `module.exports = {
   ...require('gts/.prettierrc.json')
-}`;
+}
+`;
   return generateConfigFile(options, './.prettierrc.js', style);
 }
 
@@ -308,6 +315,7 @@ export async function init(options: Options): Promise<boolean> {
   }
   await generateTsConfig(options);
   await generateESLintConfig(options);
+  await generateESLintIgnore(options);
   await generatePrettierConfig(options);
   await installDefaultTemplate(options);
 
diff --git a/test/kitchen.ts b/test/kitchen.ts
index 12abb492..c0d6dbe2 100644
--- a/test/kitchen.ts
+++ b/test/kitchen.ts
@@ -60,6 +60,7 @@ describe('🚰 kitchen sink', () => {
     // Ensure config files got generated.
     fs.accessSync(path.join(kitchenPath, 'tsconfig.json'));
     fs.accessSync(path.join(kitchenPath, '.eslintrc.json'));
+    fs.accessSync(path.join(kitchenPath, '.eslintignore'));
     fs.accessSync(path.join(kitchenPath, '.prettierrc.js'));
 
     // Compilation shouldn't have happened. Hence no `build` directory.
@@ -104,7 +105,7 @@ describe('🚰 kitchen sink', () => {
     }
   });
 
-  it('should terminate generated json files with newline', () => {
+  it('should terminate generated files with newline', () => {
     const GTS = path.resolve(stagingPath, gtsPath);
     spawn.sync(GTS, ['init', '-y'], execOpts);
     assert.ok(
@@ -122,6 +123,16 @@ describe('🚰 kitchen sink', () => {
         .readFileSync(path.join(kitchenPath, '.eslintrc.json'), 'utf8')
         .endsWith('\n')
     );
+    assert.ok(
+      fs
+        .readFileSync(path.join(kitchenPath, '.eslintignore'), 'utf8')
+        .endsWith('\n')
+    );
+    assert.ok(
+      fs
+        .readFileSync(path.join(kitchenPath, '.prettierrc.js'), 'utf8')
+        .endsWith('\n')
+    );
   });
 
   it('should check before fix', async () => {