From 18f71d25e08b7fc83c1f0568dce77d7b3b9b736a Mon Sep 17 00:00:00 2001
From: Craigory Coppola <craigorycoppola@gmail.com>
Date: Tue, 31 Oct 2023 18:23:51 -0400
Subject: [PATCH] fix(misc): nx init should add .nx/cache to gitignore (#19961)

---
 .../init/implementation/add-nx-to-monorepo.ts        |  2 ++
 .../init/implementation/add-nx-to-nest.ts            |  2 ++
 .../init/implementation/add-nx-to-npm-repo.ts        |  2 ++
 .../nx/src/command-line/init/implementation/utils.ts | 12 ++++++++++++
 packages/nx/src/command-line/init/init.ts            |  1 -
 5 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/packages/nx/src/command-line/init/implementation/add-nx-to-monorepo.ts b/packages/nx/src/command-line/init/implementation/add-nx-to-monorepo.ts
index b8653323780e3..6b74bf22a9aac 100644
--- a/packages/nx/src/command-line/init/implementation/add-nx-to-monorepo.ts
+++ b/packages/nx/src/command-line/init/implementation/add-nx-to-monorepo.ts
@@ -13,6 +13,7 @@ import {
   initCloud,
   printFinalMessage,
   runInstall,
+  updateGitIgnore,
 } from './utils';
 
 type Options = Pick<InitArgs, 'nxCloud' | 'interactive' | 'cacheable'>;
@@ -88,6 +89,7 @@ export async function addNxToMonorepo(options: Options) {
     scriptOutputs
   );
 
+  updateGitIgnore(repoRoot);
   addDepsToPackageJson(repoRoot);
 
   output.log({ title: '📦 Installing dependencies' });
diff --git a/packages/nx/src/command-line/init/implementation/add-nx-to-nest.ts b/packages/nx/src/command-line/init/implementation/add-nx-to-nest.ts
index 041453c4c01ed..e618c47965f12 100644
--- a/packages/nx/src/command-line/init/implementation/add-nx-to-nest.ts
+++ b/packages/nx/src/command-line/init/implementation/add-nx-to-nest.ts
@@ -23,6 +23,7 @@ import {
   markRootPackageJsonAsNxProject,
   printFinalMessage,
   runInstall,
+  updateGitIgnore,
 } from './utils';
 import { nxVersion } from '../../../utils/versions';
 
@@ -117,6 +118,7 @@ export async function addNxToNest(options: Options, packageJson: PackageJson) {
 
   const pmc = getPackageManagerCommand();
 
+  updateGitIgnore(repoRoot);
   addDepsToPackageJson(repoRoot);
   addNestPluginToPackageJson(repoRoot);
   markRootPackageJsonAsNxProject(
diff --git a/packages/nx/src/command-line/init/implementation/add-nx-to-npm-repo.ts b/packages/nx/src/command-line/init/implementation/add-nx-to-npm-repo.ts
index a129d3070551c..09f7a6a085d8a 100644
--- a/packages/nx/src/command-line/init/implementation/add-nx-to-npm-repo.ts
+++ b/packages/nx/src/command-line/init/implementation/add-nx-to-npm-repo.ts
@@ -11,6 +11,7 @@ import {
   markRootPackageJsonAsNxProject,
   printFinalMessage,
   runInstall,
+  updateGitIgnore,
 } from './utils';
 
 type Options = Pick<InitArgs, 'nxCloud' | 'interactive' | 'cacheable'>;
@@ -72,6 +73,7 @@ export async function addNxToNpmRepo(options: Options) {
 
   const pmc = getPackageManagerCommand();
 
+  updateGitIgnore(repoRoot);
   addDepsToPackageJson(repoRoot);
   markRootPackageJsonAsNxProject(
     repoRoot,
diff --git a/packages/nx/src/command-line/init/implementation/utils.ts b/packages/nx/src/command-line/init/implementation/utils.ts
index 4502dfe30323e..5157212ab390b 100644
--- a/packages/nx/src/command-line/init/implementation/utils.ts
+++ b/packages/nx/src/command-line/init/implementation/utils.ts
@@ -17,6 +17,7 @@ import {
 } from '../../../utils/package-manager';
 import { joinPathFragments } from '../../../utils/path';
 import { nxVersion } from '../../../utils/versions';
+import { readFileSync, writeFileSync } from 'fs';
 
 export async function askAboutNxCloud(): Promise<boolean> {
   return await enquirer
@@ -121,6 +122,17 @@ export function addDepsToPackageJson(repoRoot: string) {
   writeJsonFile(path, json);
 }
 
+export function updateGitIgnore(root: string) {
+  const ignorePath = join(root, '.gitignore');
+  try {
+    let contents = readFileSync(ignorePath, 'utf-8');
+    if (!contents.includes('.nx/cache')) {
+      contents = [contents, '', '.nx/cache'].join('\n');
+      writeFileSync(ignorePath, contents, 'utf-8');
+    }
+  } catch {}
+}
+
 export function runInstall(
   repoRoot: string,
   pmc: PackageManagerCommands = getPackageManagerCommand()
diff --git a/packages/nx/src/command-line/init/init.ts b/packages/nx/src/command-line/init/init.ts
index 4dbbb3c3c8718..b14f2eed0125c 100644
--- a/packages/nx/src/command-line/init/init.ts
+++ b/packages/nx/src/command-line/init/init.ts
@@ -2,7 +2,6 @@ import { execSync } from 'child_process';
 import { prompt } from 'enquirer';
 import { existsSync } from 'fs';
 import { prerelease } from 'semver';
-import * as parser from 'yargs-parser';
 import { addNxToMonorepo } from './implementation/add-nx-to-monorepo';
 import { addNxToNest } from './implementation/add-nx-to-nest';
 import { addNxToNpmRepo } from './implementation/add-nx-to-npm-repo';