build(aio): do not fail if `check-env` for the main angular project fails

Fixes #17434

aio/package.json

@@ -13,8 +13,8 @@
     "postbuild": "yarn sw-manifest && yarn sw-copy",
     "lint": "yarn check-env && yarn docs-lint && ng lint && yarn example-lint",
     "test": "yarn check-env && ng test",
-    "pree2e": "yarn ~~update-webdriver",
+    "pree2e": "yarn check-env && yarn ~~update-webdriver",
-    "e2e": "yarn check-env && ng e2e --no-webdriver-update",
+    "e2e": "ng e2e --no-webdriver-update",
     "setup": "yarn && yarn build-ie-polyfills && yarn boilerplate:add && yarn generate-plunkers && yarn generate-zips && yarn docs",
     "pretest-pwa-score-local": "yarn build",
     "test-pwa-score-local": "concurrently --kill-others --success first \"http-server dist -p 4200 --silent\" \"yarn test-pwa-score -- http://localhost:4200 90\"",
@@ -24,7 +24,7 @@
     "deploy-preview": "scripts/deploy-preview.sh",
     "deploy-staging": "scripts/deploy-to-firebase.sh staging",
     "deploy-production": "scripts/deploy-to-firebase.sh production",
-    "check-env": "node ../tools/check-environment.js",
+    "check-env": "node scripts/check-environment",
     "predocs": "rimraf src/generated/{docs,*.json}",
     "docs": "dgeni ./tools/transforms/angular.io-package",
     "docs-watch": "node tools/transforms/authors-package/watchr.js",
@@ -40,6 +40,10 @@
     "postinstall": "node tools/cli-patches/patch.js && uglifyjs node_modules/lunr/lunr.js -c -m -o src/assets/js/lunr.min.js --source-map",
     "build-ie-polyfills": "node node_modules/webpack/bin/webpack.js -p src/ie-polyfills.js src/generated/ie-polyfills.min.js"
   },
+  "engines": {
+    "node": ">=6.9.5 <7.0.0",
+    "yarn": ">=0.21.3 <1.0.0"
+  },
   "private": true,
   "dependencies": {
     "@angular/animations": "4.2.1",
@@ -108,6 +112,7 @@
     "remark": "^7.0.0",
     "remark-html": "^6.0.0",
     "rimraf": "^2.6.1",
+    "semver": "^5.3.0",
     "shelljs": "^0.7.7",
     "tree-kill": "^1.1.0",
     "ts-node": "~2.0.0",

aio/scripts/check-environment.js

@@ -0,0 +1,90 @@
+/**
+ * Usage:
+ *   node scripts/check-environment
+ *
+ * Checks that the expected Node and yarn versions are installed.
+ *
+ *
+ * !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+ * !!!                                                                                   !!!
+ * !!!  This file is special in that it must be able to execute with wrong Node version  !!!
+ * !!!  or even when node_modules are missing.                                           !!!
+ * !!!                                                                                   !!!
+ * !!!  Do not depend on Node4+ features or presence of npm packages here.               !!!
+ * !!!                                                                                   !!!
+ * !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
+ *
+ * This is a slightly simplified, trimmed-down version of
+ * [tools/check-environment.js](https://github.com/gkalpak/angular/blob/3896c60be/tools/check-environment.js).
+ * We use a different file, because some of the tests and error messages are not relevant for `aio/`.
+ */
+
+
+'use strict';
+
+var exec = require('child_process').exec;
+var engines = require(__dirname + '/../package.json').engines;
+var semver;
+
+// Import `semver`.
+try {
+  semver = require('semver');
+} catch (e) {
+  reportIssues(['You are missing some npm dependencies. Run: yarn install']);
+  console.error(
+      'Your environment doesn\'t provide the prerequisite dependencies.\n' +
+      'Please fix the issues listed above and then rerun the command.\n' +
+      'Check out https://github.com/angular/angular/blob/master/aio/README.md for more info.');
+  process.exit(1);
+}
+
+// Check Node/yarn versions.
+checkEnvironment({
+  nodeVersion: engines.node,
+  yarnVersion: engines.yarn
+});
+
+// Helpers
+function checkEnvironment(expected) {
+  exec('yarn --version', function(yarnErr, yarnStdout) {
+    var actualNodeVersion = process.version;
+    var actualYarnVersion = !yarnErr && semver.clean(yarnStdout);
+    var issues = [];
+
+    // Check Node version.
+    if (!semver.satisfies(actualNodeVersion, expected.nodeVersion)) {
+      issues.push(
+          'You are running an unsupported Node version. Expected: ' + expected.nodeVersion +
+          ' Found: ' + actualNodeVersion + '. Use nvm to update your Node version.');
+    }
+
+    // Check yarn version.
+    if (yarnErr) {
+      issues.push(
+          'You don\'t have yarn globally installed. This is required if you want to work on this ' +
+          'project. Installation instructions: https://yarnpkg.com/lang/en/docs/install/');
+    } else if (!semver.satisfies(actualYarnVersion, expected.yarnVersion)) {
+      issues.push(
+          'You are running an unsupported yarn version. Expected: ' + expected.yarnVersion +
+          ' Found: ' + actualYarnVersion + '. For instructions see:' +
+          ' https://yarnpkg.com/lang/en/docs/install/');
+    }
+
+    reportIssues(issues);
+  });
+}
+
+function reportIssues(issues) {
+  if (!issues.length) return;
+
+  console.warn('');
+  console.warn('!'.repeat(110));
+  console.warn('!!!  Your environment is not in a good shape. The following issues were found:');
+  issues.forEach(function(issue) { console.warn('!!!   - ' + issue); });
+  console.warn('!'.repeat(110));
+  console.warn('');
+
+  if (process.env.CI) {
+    process.exit(1);
+  }
+}

aio/tools/examples/shared/yarn.lock

@@ -3758,11 +3758,7 @@ lower-case@^1.1.1:
   version "1.1.4"
   resolved "https://registry.yarnpkg.com/lower-case/-/lower-case-1.1.4.tgz#9a2cabd1b9e8e0ae993a4bf7d5875c39c42e8eac"
 
-lru-cache@2:
+lru-cache@2, lru-cache@2.2.x:
-  version "2.7.3"
-  resolved "https://registry.yarnpkg.com/lru-cache/-/lru-cache-2.7.3.tgz#6d4524e8b955f95d4f5b58851ce21dd72fb4e952"
-
-lru-cache@2.2.x:
   version "2.2.4"
   resolved "https://registry.yarnpkg.com/lru-cache/-/lru-cache-2.2.4.tgz#6c658619becf14031d0d0b594b16042ce4dc063d"
 
@@ -6572,20 +6568,13 @@ ws@1.1.1:
     options ">=0.0.5"
     ultron "1.0.x"
 
-ws@1.1.2:
+ws@1.1.2, ws@^1.0.1:
   version "1.1.2"
   resolved "https://registry.yarnpkg.com/ws/-/ws-1.1.2.tgz#8a244fa052401e08c9886cf44a85189e1fd4067f"
   dependencies:
     options ">=0.0.5"
     ultron "1.0.x"
 
-ws@^1.0.1:
-  version "1.1.4"
-  resolved "https://registry.yarnpkg.com/ws/-/ws-1.1.4.tgz#57f40d036832e5f5055662a397c4de76ed66bf61"
-  dependencies:
-    options ">=0.0.5"
-    ultron "1.0.x"
-
 wtf-8@1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/wtf-8/-/wtf-8-1.0.0.tgz#392d8ba2d0f1c34d1ee2d630f15d0efb68e1048a"