Chore: upgrade to babel-7 and move it out of package.json

.gitignore

@@ -1,9 +1,26 @@
+# OS specific auto-generated folders and files
 *.swp
 .DS_Store
-npm-debug.log
-tmp
+
+# Platform specific tools (use fetch-configlet)
 bin/configlet
 bin/configlet.exe
-node_modules
+
+# IDE folders and files
 .idea
+
+# Babel specific
 babel-output
+
+# Test generated content
+tmp
+
+# package.json generated content
+node_modules
+
+# Ignore npm error/log
+npm-debug.log
+
+# Ignore yarn lockfile and error, in case someone accidentally runs yarn
+yarn.lock
+yarn-error.log

babel.config.js

@@ -0,0 +1,14 @@
+module.exports = {
+  presets: [
+    [
+      '@babel/env',
+      {
+        targets: {
+          node: 'current',
+        },
+        useBuiltIns: false,
+      },
+
+    ],
+  ],
+};

bin/tools/copy-babel-config

@@ -0,0 +1,63 @@
+#!/usr/bin/env node
+
+/**
+ * This copies the current .babelrc to a specific exercise folder or to all
+ * of them if an exercise folder is not given.
+ *
+ * Usage:
+ *
+ * ./bin/tools/copy-babel-config <exercise>
+ */
+
+// @ts-check
+
+const fs = require('fs');
+const path = require('path');
+
+const ROOT_PATH = path.join(__dirname, '..', '..');
+const BABEL_CONFIG_PATH = path.join(ROOT_PATH, 'babel.config.js');
+const EXERCISE = process.argv.slice(2).find(arg => !arg.startsWith('-'));
+
+process.stdout.write(`=> copy babel config for ${EXERCISE || 'all exercises'}\n`);
+
+
+function execute(exercise) {
+  const EXERCISE_DIR = path.join(ROOT_PATH, 'exercises', exercise);
+  const destination = path.join(EXERCISE_DIR, path.basename(BABEL_CONFIG_PATH));
+
+  fs.copyFile(BABEL_CONFIG_PATH, destination, (err) => {
+    if (err) {
+      process.stderr.write(`=> error for ${exercise}: ${err.message}\n`);
+    } else {
+      process.stdout.write(`=> copied babel config to ${exercise}\n`);
+    }
+  });
+
+}
+
+if (!EXERCISE) {
+  process.stdin.resume();
+  process.stdout.write('?> are you sure? [Y/n]\n');
+  process.stdin.once('data', (data) => {
+    process.stdin.pause();
+
+    const input = data.toString().trim();
+
+    if (!/^(?:\s?|y|yes)$/i.test(input)) {
+      process.stdout.write('=> ok bye\n');
+      process.exit(0);
+      return;
+    }
+
+    fs.readdir(path.join(ROOT_PATH, 'exercises'), (err, exercises) => {
+      if (err) {
+        process.stderr.write(err.message);
+        process.exit(-1);
+      }
+
+      exercises.forEach(execute);
+    });
+  });
+} else {
+  execute(EXERCISE);
+}

bin/tools/copy-package-json

@@ -0,0 +1,81 @@
+#!/usr/bin/env node
+
+/**
+ * This copies the current package.json to a specific exercise folder or to all
+ * of them if an exercise folder is not given. Merges the version field in case
+ * it's set.
+ *
+ * Usage:
+ *
+ * ./bin/tools/copy-package-json <exercise>
+ */
+
+// @ts-check
+
+const fs = require('fs');
+const path = require('path');
+
+const ROOT_PATH = path.join(__dirname, '..', '..');
+const EXERCISE = process.argv.slice(2).find(arg => !arg.startsWith('-'));
+
+process.stdout.write(`=> copy package.json for ${EXERCISE || 'all exercises'}\n`);
+
+function formatAsJson(data) {
+  return JSON.stringify(data, null, 2);
+}
+
+// @ts-ignore
+const BASE_PACKAGE_JSON = require('../../package.json');
+
+function execute(exercise) {
+  const EXERCISE_DIR = path.join(ROOT_PATH, 'exercises', exercise);
+  const EXERCISE_PACKAGE_JSON = path.join(EXERCISE_DIR, 'package.json');
+
+  fs.readFile(EXERCISE_PACKAGE_JSON, (err, data) => {
+    const current = JSON.parse(err ? JSON.stringify(BASE_PACKAGE_JSON) : data.toString());
+    const mergedPackage = formatAsJson(
+      {
+        ...BASE_PACKAGE_JSON,
+        version: current.version,
+      },
+    );
+
+    fs.writeFile(EXERCISE_PACKAGE_JSON, mergedPackage, (innerErr) => {
+      if (innerErr) {
+        process.stderr.write(`=> error for ${exercise}: ${err.message}\n`);
+      } else {
+        process.stdout.write(`=> copied package.json to ${exercise}\n`);
+      }
+    });
+  });
+}
+
+if (!EXERCISE) {
+  process.stdin.resume();
+  process.stdout.write('?> are you sure? [Y/n]\n');
+  process.stdin.once('data', (data) => {
+    process.stdin.pause();
+
+    const input = data.toString().trim();
+
+    if (!/^(?:\s?|y|yes)$/i.test(input)) {
+      process.stdout.write('=> ok bye\n');
+      process.exit(0);
+      return;
+    }
+
+    fs.readdir(path.join(ROOT_PATH, 'exercises'), (err, exercises) => {
+      if (err) {
+        process.stderr.write(err.message);
+        process.exit(-1);
+      }
+
+      exercises.forEach(execute);
+    });
+  });
+} else {
+  execute(EXERCISE);
+}
+
+// Sanity check matching whitespace
+fs.writeFile(path.join(ROOT_PATH, 'package.json'), formatAsJson(BASE_PACKAGE_JSON), () => {});

exercises/accumulate/babel.config.js

@@ -0,0 +1,14 @@
+module.exports = {
+  presets: [
+    [
+      '@babel/env',
+      {
+        targets: {
+          node: 'current',
+        },
+        useBuiltIns: false,
+      },
+
+    ],
+  ],
+};

exercises/accumulate/package.json

@@ -9,47 +9,21 @@
     "url": "https://github.com/exercism/javascript"
   },
   "devDependencies": {
+    "@babel/cli": "^7.2.3",
+    "@babel/core": "^7.4.0",
+    "@babel/preset-env": "^7.4.2",
     "babel-eslint": "^10.0.1",
-    "babel-jest": "^23.6.0",
-    "babel-plugin-transform-builtin-extend": "^1.1.2",
-    "babel-preset-env": "^1.7.0",
+    "babel-jest": "^24.5.0",
     "eslint": "^5.12.1",
     "eslint-config-airbnb-base": "^13.1.0",
     "eslint-plugin-import": "^2.15.0",
-    "jest": "^23.6.0"
+    "jest": "^24.5.0"
   },
   "jest": {
     "modulePathIgnorePatterns": [
       "package.json"
     ]
   },
-  "babel": {
-    "presets": [
-      [
-        "env",
-        {
-          "targets": [
-            {
-              "node": "current"
-            }
-          ]
-        }
-      ]
-    ],
-    "plugins": [
-      [
-        "babel-plugin-transform-builtin-extend",
-        {
-          "globals": [
-            "Error"
-          ]
-        }
-      ],
-      [
-        "transform-regenerator"
-      ]
-    ]
-  },
   "scripts": {
     "test": "jest --no-cache ./*",
     "watch": "jest --no-cache --watch ./*",
@@ -77,4 +51,4 @@
   },
   "license": "MIT",
   "dependencies": {}
-}
+}

exercises/acronym/babel.config.js

@@ -0,0 +1,14 @@
+module.exports = {
+  presets: [
+    [
+      '@babel/env',
+      {
+        targets: {
+          node: 'current',
+        },
+        useBuiltIns: false,
+      },
+
+    ],
+  ],
+};

exercises/acronym/package.json

@@ -9,47 +9,21 @@
     "url": "https://github.com/exercism/javascript"
   },
   "devDependencies": {
+    "@babel/cli": "^7.2.3",
+    "@babel/core": "^7.4.0",
+    "@babel/preset-env": "^7.4.2",
     "babel-eslint": "^10.0.1",
-    "babel-jest": "^23.6.0",
-    "babel-plugin-transform-builtin-extend": "^1.1.2",
-    "babel-preset-env": "^1.7.0",
+    "babel-jest": "^24.5.0",
     "eslint": "^5.12.1",
     "eslint-config-airbnb-base": "^13.1.0",
     "eslint-plugin-import": "^2.15.0",
-    "jest": "^23.6.0"
+    "jest": "^24.5.0"
   },
   "jest": {
     "modulePathIgnorePatterns": [
       "package.json"
     ]
   },
-  "babel": {
-    "presets": [
-      [
-        "env",
-        {
-          "targets": [
-            {
-              "node": "current"
-            }
-          ]
-        }
-      ]
-    ],
-    "plugins": [
-      [
-        "babel-plugin-transform-builtin-extend",
-        {
-          "globals": [
-            "Error"
-          ]
-        }
-      ],
-      [
-        "transform-regenerator"
-      ]
-    ]
-  },
   "scripts": {
     "test": "jest --no-cache ./*",
     "watch": "jest --no-cache --watch ./*",
@@ -77,4 +51,4 @@
   },
   "license": "MIT",
   "dependencies": {}
-}
+}

exercises/all-your-base/babel.config.js

@@ -0,0 +1,14 @@
+module.exports = {
+  presets: [
+    [
+      '@babel/env',
+      {
+        targets: {
+          node: 'current',
+        },
+        useBuiltIns: false,
+      },
+
+    ],
+  ],
+};