Add basic unicorn setup to ESLint config

bin-src/init.ts

@@ -30,8 +30,8 @@ export const addChromaticScriptToPackageJson = async ({ packageJson, packagePath
       },
     };
     await writeFile(packagePath, json, { spaces: 2 });
-  } catch (e) {
-    console.warn(e);
+  } catch (err) {
+    console.warn(err);
   }
 };
 

bin-src/trim-stats-file.ts

@@ -2,11 +2,11 @@ import { outputFile } from 'fs-extra';
 
 import { readStatsFile } from '../node-src/tasks/read-stats-file';
 
-const dedupe = <T>(arr: T[]) => Array.from(new Set(arr));
+const dedupe = <T>(arr: T[]) => [...new Set(arr)];
 const isUserCode = ({ name, moduleName = name }: { name?: string; moduleName?: string }) =>
   moduleName &&
   !moduleName.startsWith('(webpack)') &&
-  !moduleName.match(/(node_modules|webpack\/runtime)\//);
+  !/(node_modules|webpack\/runtime)\//.test(moduleName);
 
 /**
  * Utility to trim down a `preview-stats.json` file to the bare minimum, so that it can be used to
@@ -41,8 +41,8 @@ export async function main([statsFile = './storybook-static/preview-stats.json']
     await outputFile(
       targetFile,
       JSON.stringify({ modules: trimmedModules }, null, 2)
-        .replace(/{\n {10}/g, '{ ')
-        .replace(/\n {8}}/g, ' }')
+        .replaceAll(/{\n {10}/g, '{ ')
+        .replaceAll(/\n {8}}/g, ' }')
     );
 
     console.log(`Wrote ${targetFile}`);

eslint.config.mjs

@@ -6,7 +6,7 @@ import prettier from 'eslint-plugin-prettier';
 import security from 'eslint-plugin-security';
 import simpleImportSort from 'eslint-plugin-simple-import-sort';
 import sortClassMembers from 'eslint-plugin-sort-class-members';
-// import unicorn from 'eslint-plugin-unicorn';
+import unicorn from 'eslint-plugin-unicorn';
 import globals from 'globals';
 import tseslint from 'typescript-eslint';
 
@@ -51,7 +51,7 @@ export default [
   // lint comments
   comments.recommended,
   {
-    files: ['**/*.js', '**/*.ts'],
+    files: ['**/*.js', '**/*.ts', '**/*.jsx', '**/*.tsx'],
     rules: {
       '@eslint-community/eslint-comments/disable-enable-pair': ['error', { allowWholeFile: true }],
     },
@@ -106,37 +106,54 @@ export default [
     },
   },
   // additional lints from unicorn
-  //   unicorn.configs['flat/recommended'],
-  //   {
-  //     rules: {
-  //       'unicorn/filename-case': ['error', { case: 'camelCase' }],
-  //       // Chromatic uses err as our catch convention.
-  //       // This is baked into pino transforms as well.
-  //       'unicorn/prevent-abbreviations': [
-  //         'error',
-  //         {
-  //           allowList: {
-  //             err: true,
-  //           },
-  //         },
-  //       ],
-  //       'unicorn/catch-error-name': [
-  //         'error',
-  //         {
-  //           name: 'err',
-  //           ignore: ['^err.*$'],
-  //         },
-  //       ],
-  //       'unicorn/switch-case-braces': 'off',
-  //     },
-  //   },
+  unicorn.configs['flat/recommended'],
+  {
+    rules: {
+      // TODO: Switch this to 'error' when we are ready to enforce this rule
+      'unicorn/filename-case': ['off', { case: 'camelCase' }],
+      // Chromatic uses err as our catch convention.
+      // This is baked into pino transforms as well.
+      'unicorn/prevent-abbreviations': [
+        'off', // TODO: Switch this to 'error' when we are ready to enforce this rule
+        {
+          allowList: {
+            err: true,
+            props: true,
+            ctx: true,
+            str: true,
+            args: true,
+            docsUrl: true,
+          },
+        },
+      ],
+      'unicorn/catch-error-name': [
+        'error',
+        {
+          ignore: ['err'],
+        },
+      ],
+      'unicorn/switch-case-braces': 'off',
+      'unicorn/no-process-exit': 'off',
+      'unicorn/prefer-node-protocol': 'off', // This will error our Webpack build
+      // TODO: remove the following lines when we are ready to enforce this rule
+      'unicorn/no-anonymous-default-export': 'off',
+      'unicorn/no-null': 'off',
+      'unicorn/better-regex': 'off',
+      'unicorn/no-array-reduce': 'off',
+      'unicorn/no-array-callback-reference': 'off',
+      'unicorn/prefer-string-raw': 'off',
+      'unicorn/prefer-module': 'off',
+      'unicorn/no-array-for-each': 'off',
+      'unicorn/prefer-spread': 'off',
+    },
+  },
   // prefer TS to complain when we miss an arg vs. sending an intentional undefined
-  //   {
-  //     files: ['**/*.ts'],
-  //     rules: {
-  //       'unicorn/no-useless-undefined': 'off',
-  //     },
-  //   },
+  {
+    files: ['**/*.ts'],
+    rules: {
+      'unicorn/no-useless-undefined': 'off',
+    },
+  },
   // security related lints
   security.configs.recommended,
   {

isChromatic.js

@@ -4,7 +4,7 @@ module.exports = function isChromatic(windowArg) {
   const windowToCheck = windowArg || (typeof window !== 'undefined' && window);
   return !!(
     windowToCheck &&
-    (windowToCheck.navigator.userAgent.match(/Chromatic/) ||
-      windowToCheck.location.href.match(/chromatic=true/))
+    (/Chromatic/.test(windowToCheck.navigator.userAgent) ||
+      /chromatic=true/.test(windowToCheck.location.href))
   );
 };

isChromatic.mjs

@@ -4,7 +4,7 @@ export default function isChromatic(windowArg) {
   const windowToCheck = windowArg || (typeof window !== 'undefined' && window);
   return !!(
     windowToCheck &&
-    (windowToCheck.navigator.userAgent.match(/Chromatic/) ||
-      windowToCheck.location.href.match(/chromatic=true/))
+    (/Chromatic/.test(windowToCheck.navigator.userAgent) ||
+      /chromatic=true/.test(windowToCheck.location.href))
   );
 }

node-src/__mocks__/storybookBaseDir/subdir/test.js

@@ -0,0 +1,2 @@
+/* eslint-disable unicorn/no-empty-file */
+// This file is intentionally left blank

node-src/__mocks__/storybookBaseDir/subdir/test.jsx

@@ -0,0 +1,2 @@
+/* eslint-disable unicorn/no-empty-file */
+// This file is intentionally left blank

node-src/__mocks__/storybookBaseDir/subdir/test.tsx

@@ -0,0 +1,2 @@
+/* eslint-disable unicorn/no-empty-file */
+// This file is intentionally left blank

node-src/__mocks__/storybookBaseDir/test.ts

@@ -0,0 +1,2 @@
+/* eslint-disable unicorn/no-empty-file */
+// This file is intentionally left blank

node-src/git/generateGitRepository.ts

@@ -18,12 +18,12 @@ async function generateCommit(
   [name, parentNames]: Line,
   commitMap: CommitMap
 ) {
-  const parentCommits = []
-    .concat(parentNames)
-    .filter((parentName) => commitMap[parentName])
-    .map((parentName) => commitMap[parentName].hash);
+  const parentCommits = [parentNames]
+    .flat()
+    .filter((parentName) => parentName && commitMap[parentName])
+    .map((parentName) => parentName && commitMap[parentName].hash);
 
-  const randomBranchName = `temp-${Math.random().toString().substring(2)}`;
+  const randomBranchName = `temp-${Math.random().toString().slice(2)}`;
   const commitEnv = `GIT_COMMITTER_DATE='${nextDate()}'`;
   // No parent, check out nothing
   if (parentCommits.length === 0) {
@@ -34,15 +34,14 @@ async function generateCommit(
     await runGit(`git checkout ${parentCommits[0]}`);
 
     // If more parents, create merge commit
-    if (parentCommits.length > 1) {
-      await runGit(`${commitEnv} git merge -m ${name} ${parentCommits.slice(1).join(' ')}`);
-    } else {
-      await runGit(`${commitEnv} git commit -m ${name} --allow-empty`);
-    }
+    await (parentCommits.length > 1
+      ? runGit(`${commitEnv} git merge -m ${name} ${parentCommits.slice(1).join(' ')}`)
+      : runGit(`${commitEnv} git commit -m ${name} --allow-empty`));
   }
-  const [hash, committedAt] = (await runGit(`git show --format=%H,%ct`)).stdout.trim().split(',');
+  const gitShowStr = await runGit(`git show --format=%H,%ct`);
+  const [hash, committedAt] = gitShowStr.stdout.trim().split(',');
 
-  return { hash, committedAt: parseInt(committedAt, 10) };
+  return { hash, committedAt: Number.parseInt(committedAt, 10) };
 }
 
 // Take a repository description in the following format:

node-src/git/getChangedFilesWithReplacement.test.ts

@@ -5,7 +5,7 @@ import { getChangedFilesWithReplacement } from './getChangedFilesWithReplacement
 
 vi.mock('./git', () => ({
   getChangedFiles: (hash) => {
-    if (hash.match(/exists/)) return ['changed', 'files'];
+    if (/exists/.test(hash)) return ['changed', 'files'];
     throw new Error(`fatal: bad object ${hash}`);
   },
   commitExists: (hash) => hash.match(/exists/),

node-src/git/getChangedFilesWithReplacement.ts

@@ -34,7 +34,7 @@ export async function getChangedFilesWithReplacement(
       `Got error fetching commit for #${build.number}(${build.commit}): ${err.message}`
     );
 
-    if (err.message.match(/(bad object|uncommitted changes)/)) {
+    if (/(bad object|uncommitted changes)/.test(err.message)) {
       const replacementBuild = await findAncestorBuildWithCommit(context, build.number);
 
       if (replacementBuild) {

node-src/git/getCommitAndBranch.test.ts

@@ -24,7 +24,7 @@ beforeEach(() => {
   getBranch.mockResolvedValue('main');
   getCommit.mockResolvedValue({
     commit: '48e0c83fadbf504c191bc868040b7a969a4f1feb',
-    committedAt: 1640094096000,
+    committedAt: 1_640_094_096_000,
     committerName: 'GitHub',
     committerEmail: '[email protected]',
   });
@@ -40,7 +40,7 @@ afterEach(() => {
 });
 
 const commitInfo = {
-  committedAt: 1640131292,
+  committedAt: 1_640_131_292,
   committerName: 'Gert Hengeveld',
   committerEmail: '[email protected]',
 };
@@ -51,7 +51,7 @@ describe('getCommitAndBranch', () => {
     expect(info).toMatchObject({
       branch: 'main',
       commit: '48e0c83fadbf504c191bc868040b7a969a4f1feb',
-      committedAt: 1640094096000,
+      committedAt: 1_640_094_096_000,
       committerName: 'GitHub',
       committerEmail: '[email protected]',
       slug: undefined,

node-src/git/getParentCommits.test.ts

@@ -56,7 +56,7 @@ function expectCommitsToEqualNames(hashes, names, { commitMap }) {
 
 async function checkoutCommit(name, branch, { dirname, runGit, commitMap }) {
   process.chdir(dirname);
-  await runGit(`git checkout ${branch !== 'HEAD' ? `-B ${branch}` : ''} ${commitMap[name].hash}`);
+  await runGit(`git checkout ${branch === 'HEAD' ? '' : `-B ${branch}`} ${commitMap[name].hash}`);
 
   return commitMap[name].hash;
 }
@@ -77,7 +77,7 @@ const repositories: Record<string, Repository> = {};
 beforeAll(async () => {
   await Promise.all(
     Object.keys(descriptions).map(async (key) => {
-      const dirname = (await tmp.dir({ unsafeCleanup: true, prefix: `chromatictest-` })).path;
+      const { path: dirname } = await tmp.dir({ unsafeCleanup: true, prefix: `chromatictest-` });
       const runGit = makeRunGit(dirname);
       const commitMap = await generateGitRepository(runGit, descriptions[key]);
       repositories[key] = { dirname, runGit, commitMap };

node-src/git/getParentCommits.ts

@@ -107,7 +107,8 @@ async function nextCommits(
       ${firstCommittedAtSeconds ? `--since ${firstCommittedAtSeconds}` : ''} \
       -n ${limit + commitsWithoutBuilds.length} --not ${commitsForCLI(commitsWithBuilds)}`;
   log.debug(`running ${command}`);
-  const commits = (await execGitCommand(command)).split('\n').filter(Boolean);
+  const commitsString = await execGitCommand(command);
+  const commits = commitsString.split('\n').filter(Boolean);
   log.debug(`command output: ${commits}`);
 
   // Later on we want to know which commits we visited on the way to finding the ancestor commits
@@ -190,7 +191,8 @@ async function maximallyDescendentCommits({ log }: Pick<Context, 'log'>, commits
   // This just filters any commits that are ancestors of other commits
   const command = `git rev-list ${commitsForCLI(commits)} --not ${commitsForCLI(parentCommits)}`;
   log.debug(`running ${command}`);
-  const maxCommits = (await execGitCommand(command)).split('\n').filter(Boolean);
+  const maxCommitsString = await execGitCommand(command);
+  const maxCommits = maxCommitsString.split('\n').filter(Boolean);
   log.debug(`command output: ${maxCommits}`);
 
   return maxCommits;

node-src/git/git.test.ts

@@ -28,7 +28,7 @@ describe('getCommit', () => {
     );
     expect(await getCommit()).toEqual({
       commit: '19b6c9c5b3d34d9fc55627fcaf8a85bd5d5e5b2a',
-      committedAt: 1696588814 * 1000,
+      committedAt: 1_696_588_814 * 1000,
       committerEmail: '[email protected]',
       committerName: 'Gert Hengeveld',
     });
@@ -48,7 +48,7 @@ gpg: Can't check signature: No public key
     );
     expect(await getCommit()).toEqual({
       commit: '19b6c9c5b3d34d9fc55627fcaf8a85bd5d5e5b2a',
-      committedAt: 1696588814 * 1000,
+      committedAt: 1_696_588_814 * 1000,
       committerEmail: '[email protected]',
       committerName: 'Gert Hengeveld',
     });