From b83a19a98ec5db85b96e645916dcb65dbc64fbbd Mon Sep 17 00:00:00 2001
From: Luke Karrys <luke@lukekarrys.com>
Date: Wed, 5 Jul 2023 12:03:25 -0700
Subject: [PATCH] feat: add config option to disable eslint

---
 lib/config.js        |  8 ++++++++
 lib/content/index.js | 11 +++++++++--
 lib/content/pkg.json |  2 +-
 test/apply/eslint.js | 24 ++++++++++++++++++++++++
 4 files changed, 42 insertions(+), 3 deletions(-)
 create mode 100644 test/apply/eslint.js

diff --git a/lib/config.js b/lib/config.js
index 0c6333c3..e643fbab 100644
--- a/lib/config.js
+++ b/lib/config.js
@@ -251,6 +251,14 @@ const getFullConfig = async ({
     derived.engines = pkgConfig.engines || engines
   }
 
+  if (!pkgConfig.eslint) {
+    derived.ignorePaths = derived.ignorePaths.filter(p => !p.includes('eslint'))
+    if (Array.isArray(pkgConfig.requiredPackages?.devDependencies)) {
+      pkgConfig.requiredPackages.devDependencies =
+        pkgConfig.requiredPackages.devDependencies.filter(p => !p.includes('eslint'))
+    }
+  }
+
   const gitUrl = await getGitUrl(rootPkg.path)
   if (gitUrl) {
     derived.repository = {
diff --git a/lib/content/index.js b/lib/content/index.js
index 54af4cf6..1437e1be 100644
--- a/lib/content/index.js
+++ b/lib/content/index.js
@@ -85,7 +85,10 @@ const rootRepo = {
 // dir. so we might want to combine these
 const rootModule = {
   add: {
-    '.eslintrc.js': 'eslintrc.js',
+    '.eslintrc.js': {
+      file: 'eslintrc.js',
+      filter: (p) => p.config.eslint,
+    },
     '.gitignore': 'gitignore',
     '.npmrc': 'npmrc',
     'SECURITY.md': 'SECURITY.md',
@@ -113,7 +116,10 @@ const workspaceRepo = {
 // Changes for each workspace but applied to the relative workspace dir
 const workspaceModule = {
   add: {
-    '.eslintrc.js': 'eslintrc.js',
+    '.eslintrc.js': {
+      file: 'eslintrc.js',
+      filter: (p) => p.config.eslint,
+    },
     '.gitignore': 'gitignore',
     'package.json': 'pkg.json',
   },
@@ -155,6 +161,7 @@ module.exports = {
   ciVersions: ['14.17.0', '14.x', '16.13.0', '16.x', '18.0.0', '18.x'],
   lockfile: false,
   codeowner: '@npm/cli-team',
+  eslint: true,
   publish: false,
   npm: 'npm',
   npx: 'npx',
diff --git a/lib/content/pkg.json b/lib/content/pkg.json
index 387626ef..631f5dbd 100644
--- a/lib/content/pkg.json
+++ b/lib/content/pkg.json
@@ -2,7 +2,7 @@
   "author": "GitHub Inc.",
   "files": {{{ json distPaths }}},
   "scripts": {
-    "lint": "eslint \"**/*.js\"",
+    "lint": "{{#if eslint}}eslint \"**/*.js\"{{else}}echo linting disabled{{/if}}",
     "postlint": "template-oss-check",
     "template-oss-apply": "template-oss-apply --force",
     "lintfix": "{{ localNpmPath }} run lint -- --fix",
diff --git a/test/apply/eslint.js b/test/apply/eslint.js
new file mode 100644
index 00000000..56692818
--- /dev/null
+++ b/test/apply/eslint.js
@@ -0,0 +1,24 @@
+const t = require('tap')
+const setup = require('../setup.js')
+
+t.test('can disable eslint', async (t) => {
+  const s = await setup(t, {
+    package: {
+      templateOSS: {
+        eslint: false,
+      },
+    },
+  })
+  await s.apply()
+
+  const pkg = await s.readJson('package.json')
+  delete pkg.templateOSS // templateOSS config has eslint in it
+  t.notMatch(JSON.stringify(pkg), 'eslint')
+
+  const gitignore = await s.readFile('.gitignore')
+  t.notMatch(gitignore, 'eslint')
+
+  const checks = await s.check()
+  t.equal(checks.length, 1)
+  t.notMatch(checks[0].solution, 'eslint')
+})