fix(misc): add a migration to update or remove references to @nrwl/web/babel

packages/workspace/migrations.json

@@ -95,6 +95,12 @@
       "description": "Generates a plugin called 'workspace-plugin' containing your workspace generators.",
       "cli": "nx",
       "implementation": "./src/migrations/update-16-0-0/move-workspace-generators-to-local-plugin"
+    },
+    "16-0-0-fix-invalid-babelrc": {
+      "version": "16.0.0-beta.9",
+      "description": "Fix .babelrc presets if it contains an invalid entry for @nx/web/babel.",
+      "cli": "nx",
+      "implementation": "./src/migrations/update-16-0-0/fix-invalid-babelrc"
     }
   },
   "packageJsonUpdates": {

packages/workspace/src/migrations/update-16-0-0/fix-invalid-babelrc.spec.ts

@@ -0,0 +1,100 @@
+import {
+  addProjectConfiguration,
+  readJson,
+  Tree,
+  updateJson,
+  writeJson,
+} from '@nx/devkit';
+import { createTreeWithEmptyWorkspace } from '@nx/devkit/testing';
+import update from './fix-invalid-babelrc';
+
+describe('fix-invalid-babelrc', () => {
+  let tree: Tree;
+
+  beforeEach(() => {
+    tree = createTreeWithEmptyWorkspace();
+  });
+
+  it.each`
+    webPlugin
+    ${'@nrwl/web'}
+    ${'@nx/web'}
+  `('should skip update if Web plugin is installed', ({ webPlugin }) => {
+    addProjectConfiguration(tree, 'proj', {
+      root: 'proj',
+      name: 'proj',
+    });
+    updateJson(tree, 'package.json', (json) => {
+      json.devDependencies[webPlugin] = '16.0.0';
+      return json;
+    });
+    writeJson(tree, 'proj/.babelrc', {
+      presets: [['@nx/web/babel', {}]],
+    });
+
+    update(tree);
+
+    expect(readJson(tree, 'proj/.babelrc')).toEqual({
+      presets: [['@nx/web/babel', {}]],
+    });
+  });
+
+  it.each`
+    jsPlugin      | originalPreset
+    ${'@nrwl/js'} | ${'@nrwl/web/babel'}
+    ${'@nrwl/js'} | ${'@nx/web/babel'}
+    ${'@nx/js'}   | ${'@nrwl/web/babel'}
+    ${'@nx/js'}   | ${'@nx/web/babel'}
+  `(
+    'should rename @nrwl/web/babel to @nx/js/babel when JS plugin is installed',
+    ({ jsPlugin, originalPreset }) => {
+      addProjectConfiguration(tree, 'proj1', {
+        root: 'proj1',
+        name: 'proj1',
+      });
+      addProjectConfiguration(tree, 'proj2', {
+        root: 'proj2',
+        name: 'proj2',
+      });
+      updateJson(tree, 'package.json', (json) => {
+        json.devDependencies[jsPlugin] = '16.0.0';
+        return json;
+      });
+      writeJson(tree, 'proj1/.babelrc', {
+        presets: [[originalPreset, {}]],
+      });
+      writeJson(tree, 'proj2/.babelrc', {
+        presets: [originalPreset],
+      });
+
+      update(tree);
+
+      expect(readJson(tree, 'proj1/.babelrc')).toEqual({
+        presets: [['@nx/js/babel', {}]],
+      });
+      expect(readJson(tree, 'proj2/.babelrc')).toEqual({
+        presets: ['@nx/js/babel'],
+      });
+    }
+  );
+
+  it('should remove the invalid preset if neither Web nor JS plugins are present', () => {
+    addProjectConfiguration(tree, 'proj', {
+      root: 'proj',
+      name: 'proj',
+    });
+    writeJson(tree, 'proj/.babelrc', {
+      presets: [
+        '@babel/preset-env',
+        ['@nx/web/babel', {}],
+        '@babel/preset-typescript',
+      ],
+    });
+
+    update(tree);
+
+    expect(readJson(tree, 'proj/.babelrc')).toEqual({
+      presets: ['@babel/preset-env', '@babel/preset-typescript'],
+    });
+  });
+});

packages/workspace/src/migrations/update-16-0-0/fix-invalid-babelrc.ts

@@ -0,0 +1,51 @@
+import {
+  getProjects,
+  joinPathFragments,
+  readJson,
+  Tree,
+  writeJson,
+} from '@nx/devkit';
+
+export default function update(tree: Tree) {
+  const projects = getProjects(tree);
+  const packageJson = readJson(tree, 'package.json');
+
+  // In case user installed as prod dep.
+  const deps = { ...packageJson.dependencies, ...packageJson.devDependencies };
+
+  // If web package is installed, skip update.
+  if (deps['@nrwl/web'] || deps['@nx/web']) {
+    return;
+  }
+
+  projects.forEach((config, name) => {
+    const babelRcPath = joinPathFragments(config.root, '.babelrc');
+    if (!tree.exists(babelRcPath)) return;
+
+    const babelRc = readJson(tree, babelRcPath);
+    const nrwlWebBabelPresetIdx = babelRc.presets?.findIndex((p) =>
+      // Babel preset could be specified as a string or a tuple with options.
+      // Account for rescope migration running before or after this one.
+      Array.isArray(p)
+        ? p[0] === '@nrwl/web/babel' || p[0] === '@nx/web/babel'
+        : p === '@nrwl/web/babel' || p === '@nx/web/babel'
+    );
+
+    if (nrwlWebBabelPresetIdx === undefined || nrwlWebBabelPresetIdx === -1) {
+      return;
+    }
+
+    if (deps['@nrwl/js'] || deps['@nx/js']) {
+      // If JS plugin is installed, then rename to @nx/js/babel.
+      const found = babelRc.presets[nrwlWebBabelPresetIdx];
+      babelRc.presets[nrwlWebBabelPresetIdx] = Array.isArray(found)
+        ? ['@nx/js/babel', found[1]]
+        : '@nx/js/babel';
+    } else {
+      // Otherwise, remove from config.
+      babelRc.presets.splice(nrwlWebBabelPresetIdx, 1);
+    }
+
+    writeJson(tree, babelRcPath, babelRc);
+  });
+}