Convert to ESLint 9 flat config and move to pnpm, use .mjs and new jest types

.gitignore

@@ -1,5 +1,5 @@
 /node_modules
 /bin/configlet
 /bin/configlet.exe
-/pnpm-lock.yaml
+/package-lock.json
 /yarn.lock

babel.config.js

@@ -1,4 +1,4 @@
 module.exports = {
-  presets: ['@exercism/babel-preset-javascript'],
+  presets: [['@exercism/babel-preset-javascript', { corejs: '3.38' }]],
   plugins: [],
 };

bin/check-formatting.sh

@@ -1,27 +1,50 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
-if [ -z "$EXERCISM_PRETTIER_VERSION" ]; then
-  echo "Pulling prettier version from package.json"
-  EXERCISM_PRETTIER_VERSION=$(npm list prettier | grep -Po '.*\sprettier@\K.*')
+set -uo pipefail
+
+if [ -z "${EXERCISM_PRETTIER_VERSION:-}" ]; then
+  echo "[format] pulling prettier version from pnpm list using sed"
+  EXERCISM_PRETTIER_VERSION="$(corepack pnpm list prettier --parseable | sed -n -e '1,$s/^.*prettier@//' -e 's/\\node_modules\\prettier//p')"
+  echo "[format] expected version is now ${EXERCISM_PRETTIER_VERSION:-}"
+fi
+
+if [ -z "${EXERCISM_PRETTIER_VERSION:-}" ]; then
+  echo "[format] pulling prettier version via pnpm-lock.yaml using grep"
+  EXERCISM_PRETTIER_VERSION="$(cat pnpm-lock.yaml | grep -Po '  prettier@\K[^:]+')"
+  echo "[format] expected version is now ${EXERCISM_PRETTIER_VERSION:-}"
 fi
 
-if [ -z "$EXERCISM_PRETTIER_VERSION" ]; then
+if [ -z "${EXERCISM_PRETTIER_VERSION:-}" ]; then
+  echo "Version could not be pulled using sed or grep" >&2
+  echo ""
   echo "---------------------------------------------------"
   echo "This script requires the EXERCISM_PRETTIER_VERSION variable to work."
   echo "Please see https://exercism.org/docs/building/markdown/style-guide for guidance."
   echo "---------------------------------------------------"
-  echo "This is what npm list reports:"
-  echo "$(npm list prettier)"
+  echo "$(corepack pnpm -v)"
+  echo ""
+  echo "This is what corepack pnpm list reports:"
+  echo "$ corepack pnpm list prettier --parseable"
+  echo "$(corepack pnpm list prettier --parseable)"
+  echo ""
+  echo "And corepack pnpm info reports the following:"
+  echo "$ corepack pnpm info prettier"
+  echo "$(corepack pnpm info prettier)"
+  echo ""
+  echo "This is the version that can be extracted using sed:"
+  echo "$ corepack pnpm list prettier --parseable | sed -n -e '1,\$s/^.*prettier@//' -e 's/\\node_modules\\prettier//p'"
+  echo "└─ $(corepack pnpm list prettier --parseable | sed -n -e '1,$s/^.*prettier@//' -e 's/\\node_modules\\prettier//p')"
   echo ""
-  echo "This is the version that can be extracted:"
-  echo "$(npm list prettier | grep -Po '.*\sprettier@\K.*')"
+  echo "This is the version that can be extracted using grep:"
+  echo "$ cat  pnpm-lock.yaml | grep -Po '  prettier@\K[^:]+'"
+  echo "└─ $(cat  pnpm-lock.yaml | grep -Po '  prettier@\K[^:]+')"
   echo ""
   echo "These files are found in the repo root:"
   echo "$(ls -p | grep -v /)"
   echo "---------------------------------------------------"
   exit 1
 else
- echo "Running format with prettier@$EXERCISM_PRETTIER_VERSION"
+ echo "[format] running with prettier@$EXERCISM_PRETTIER_VERSION"
 fi
 
-npx "prettier@$EXERCISM_PRETTIER_VERSION" --check "*/**/*.{js,jsx,ts,tsx,css,sass,scss,html,json,md,yml}"
+corepack pnpm dlx "prettier@$EXERCISM_PRETTIER_VERSION" --check "**/*.{js,jsx,cjs,mjs,ts,tsx,css,sass,scss,html,json,md,yml}"

bin/format.sh

@@ -1,27 +1,50 @@
 #!/usr/bin/env bash
 
-if [ -z "$EXERCISM_PRETTIER_VERSION" ]; then
-  echo "Pulling prettier version from package.json"
-  EXERCISM_PRETTIER_VERSION=$(npm list prettier | grep -Po '.*\sprettier@\K.*')
+set -uo pipefail
+
+if [ -z "${EXERCISM_PRETTIER_VERSION:-}" ]; then
+  echo "[format] pulling prettier version from pnpm list using sed"
+  EXERCISM_PRETTIER_VERSION="$(corepack pnpm list prettier --parseable | sed -n -e '1,$s/^.*prettier@//' -e 's/\\node_modules\\prettier//p')"
+  echo "[format] expected version is now ${EXERCISM_PRETTIER_VERSION:-}"
+fi
+
+if [ -z "${EXERCISM_PRETTIER_VERSION:-}" ]; then
+  echo "[format] pulling prettier version via pnpm-lock.yaml using grep"
+  EXERCISM_PRETTIER_VERSION="$(cat pnpm-lock.yaml | grep -Po '  prettier@\K[^:]+')"
+  echo "[format] expected version is now ${EXERCISM_PRETTIER_VERSION:-}"
 fi
 
-if [ -z "$EXERCISM_PRETTIER_VERSION" ]; then
+if [ -z "${EXERCISM_PRETTIER_VERSION:-}" ]; then
+  echo "Version could not be pulled using sed or grep" >&2
+  echo ""
   echo "---------------------------------------------------"
   echo "This script requires the EXERCISM_PRETTIER_VERSION variable to work."
   echo "Please see https://exercism.org/docs/building/markdown/style-guide for guidance."
   echo "---------------------------------------------------"
-  echo "This is what npm list reports:"
-  echo "$(npm list prettier)"
+  echo "$(corepack pnpm -v)"
+  echo ""
+  echo "This is what corepack pnpm list reports:"
+  echo "$ corepack pnpm list prettier --parseable"
+  echo "$(corepack pnpm list prettier --parseable)"
+  echo ""
+  echo "And corepack pnpm info reports the following:"
+  echo "$ corepack pnpm info prettier"
+  echo "$(corepack pnpm info prettier)"
+  echo ""
+  echo "This is the version that can be extracted using sed:"
+  echo "$ corepack pnpm list prettier --parseable | sed -n -e '1,\$s/^.*prettier@//' -e 's/\\node_modules\\prettier//p'"
+  echo "└─ $(corepack pnpm list prettier --parseable | sed -n -e '1,$s/^.*prettier@//' -e 's/\\node_modules\\prettier//p')"
   echo ""
-  echo "This is the version that can be extracted:"
-  echo "$(npm list prettier | grep -Po '.*\sprettier@\K.*')"
+  echo "This is the version that can be extracted using grep:"
+  echo "$ cat  pnpm-lock.yaml | grep -Po '  prettier@\K[^:]+'"
+  echo "└─ $(cat  pnpm-lock.yaml | grep -Po '  prettier@\K[^:]+')"
   echo ""
   echo "These files are found in the repo root:"
   echo "$(ls -p | grep -v /)"
   echo "---------------------------------------------------"
   exit 1
 else
- echo "Running format with prettier@$EXERCISM_PRETTIER_VERSION"
+ echo "[format] running with prettier@$EXERCISM_PRETTIER_VERSION"
 fi
 
-npx "prettier@$EXERCISM_PRETTIER_VERSION" --write "**/*.{js,jsx,ts,tsx,css,sass,scss,html,json,md,yml}"
+corepack pnpm dlx "prettier@$EXERCISM_PRETTIER_VERSION" --write "**/*.{js,jsx,cjs,mjs,ts,tsx,css,sass,scss,html,json,md,yml}"

bin/generate-config-tree

@@ -1,35 +1,35 @@
 #!/usr/bin/env node
 
-const { exercises } = require('../config.json')
-const TAG_CORE = '__core'
-const TAG_BONUS = '__bonus'
+const { exercises } = require('../config.json');
+const TAG_CORE = '__core';
+const TAG_BONUS = '__bonus';
 
 // node inter-opt exports
-exports.TAG_CORE = TAG_CORE
-exports.TAG_BONUS = TAG_BONUS
+exports.TAG_CORE = TAG_CORE;
+exports.TAG_BONUS = TAG_BONUS;
 
 exports.tree = exercises.reduce((result, exercise) => {
-    const tag = exercise.slug
+    const tag = exercise.slug;
     const item = {
         slug: tag,
         difficulty: exercise.difficulty,
-    }
+    };
 
     if (exercise.core) {
-        const current = result[TAG_CORE] || []
+        const current = result[TAG_CORE] || [];
 
         if (result[tag]) {
-            console.warn(`${tag} is not ordered correctly in config.json`)
+            console.warn(`${tag} is not ordered correctly in config.json`);
         }
 
         return {
             ...result,
             __core: current.concat([item]),
-            [tag]: result[tag] || []
-        }
+            [tag]: result[tag] || [],
+        };
     }
 
-    const parent = exercise.unlocked_by || TAG_BONUS
-    const current = result[parent] || []
-    return { ...result, [parent]: current.concat([item]) }
-}, {})
+    const parent = exercise.unlocked_by || TAG_BONUS;
+    const current = result[parent] || [];
+    return { ...result, [parent]: current.concat([item]) };
+}, {});

bin/lint.sh

@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+corepack enable pnpm
+corepack pnpm lint

bin/print-config-tree

@@ -1,34 +1,34 @@
 #!/usr/bin/env node
 
-const actions = require('./generate-config-tree')
+const actions = require('./generate-config-tree');
 
-const { tree, TAG_BONUS, TAG_CORE } = actions
-const { [TAG_BONUS]: __bonus, [TAG_CORE]: __core, ...track } = tree
+const { tree, TAG_BONUS, TAG_CORE } = actions;
+const { [TAG_BONUS]: __bonus, [TAG_CORE]: __core, ...track } = tree;
 
 function printLn(line) {
-    process.stdout.write(`${line}\n`)
+    process.stdout.write(`${line}\n`);
 }
 
 function printList(items) {
-    items.forEach(item => {
-        printLn(`- ${item.slug} (${item.difficulty})`)
-    })
+    items.forEach((item) => {
+        printLn(`- ${item.slug} (${item.difficulty})`);
+    });
 }
 
-printLn('Core (matches config.json) of this track:')
-printList(__core)
-printLn('\n')
-printLn('core')
-printLn('----')
-Object.keys(track).forEach(slug => {
-    printLn(`├─ ${slug}`)
+printLn('Core (matches config.json) of this track:');
+printList(__core);
+printLn('\n');
+printLn('core');
+printLn('----');
+Object.keys(track).forEach((slug) => {
+    printLn(`├─ ${slug}`);
     track[slug].forEach((side, index, self) => {
-        junction = index === self.length - 1 ? '└─' : '├─'
-        printLn(`│  ${junction} ${side.slug} (${side.difficulty})`)
-    })
-    printLn('│')
-})
+        junction = index === self.length - 1 ? '└─' : '├─';
+        printLn(`│  ${junction} ${side.slug} (${side.difficulty})`);
+    });
+    printLn('│');
+});
 
-printLn('bonus')
-printLn('----')
-printList(__bonus)
+printLn('bonus');
+printLn('----');
+printList(__bonus);

eslint.config.mjs

@@ -0,0 +1,41 @@
+// @ts-check
+
+import config from '@exercism/eslint-config-javascript';
+import maintainersConfig from '@exercism/eslint-config-javascript/maintainers.mjs';
+
+import globals from 'globals';
+
+export default [
+  ...config,
+  {
+    files: ['.meta/proof.ci.js', '.meta/exemplar.js', '*.spec.js'],
+    extends: maintainersConfig,
+  },
+  {
+    files: ['scripts/**/*.mjs'],
+    languageOptions: {
+      globals: {
+        ...globals.node,
+      },
+    },
+  },
+  {
+    ignores: [
+      // # Protected or generated
+      '/.appends/**/*',
+      '/.github/**/*',
+      '/.vscode/**/*',
+
+      // # Binaries
+      '/bin/*',
+
+      // # Configuration
+      '/config',
+      '/babel.config.js',
+
+      // # Typings
+      '/exercises/**/global.d.ts',
+      '/exercises/**/env.d.ts',
+    ],
+  },
+];

jest.config.js

@@ -0,0 +1,8 @@
+module.exports = {
+  verbose: true,
+  modulePathIgnorePatterns: ['package.json'],
+  transform: {
+    '^.+\\.[t|j]sx?$': 'babel-jest',
+  },
+  reporters: [],
+};