Update to Yarn 3

.github/workflows/ci.yml

@@ -28,7 +28,7 @@ jobs:
           YARN_ENABLE_SCRIPTS: false # disable post-install scripts
           YARN_NODE_LINKER: pnp # use pnp linker for better linking performance: it's meant to update yarn cache only
         run: |
-          yarn install --immutable --skip-builds
+          yarn install --mode=skip-build
 
   yarn-validate:
     name: Validate Yarn dependencies and constraints
@@ -327,6 +327,10 @@ jobs:
           "
       - name: Install
         run: yarn install
+        env:
+          # The "Support self-references on old Node.js" step mutates the
+          # package.json file, causing a yarn.lock update.
+          YARN_ENABLE_IMMUTABLE_INSTALLS: false
       - uses: actions/download-artifact@v2
         with:
           name: babel-artifact
@@ -344,7 +348,7 @@ jobs:
         with:
           node-version: 10
       - name: Test Node.js 10
-        run: yarn test:runtime:node
+        run: node test/runtime-integration/node.cjs
       - name: Use Node.js 12.0
         uses: actions/setup-node@v2-beta
         with:

.github/workflows/update-parser-tests.yml

@@ -38,7 +38,7 @@ jobs:
           echo ${{ steps.test262.outputs.sha1 }} | ./scripts/parser-tests/bump-test262-version.sh
       - name: Build babel parser
         run: |
-          yarn install --immutable --skip-builds
+          yarn install --immutable --mode=skip-build
           yarn gulp build-rollup
       - name: Update test262 allow list
         run: |

.yarnrc

@@ -1,3 +1,3 @@
-# Use Yarn 2
+# Use Yarn 3
 # This path should always match the one in .yarnrc.yml
-yarn-path ".yarn/releases/yarn-2.4.1.cjs"
+yarn-path ".yarn/releases/yarn-3.0.2.cjs"

.yarnrc.yml

@@ -35,4 +35,4 @@ releaseTool:
 unsafeHttpWhitelist:
   - localhost
 
-yarnPath: .yarn/releases/yarn-2.4.1.cjs
+yarnPath: .yarn/releases/yarn-3.0.2.cjs

Makefile

@@ -181,7 +181,6 @@ prepublish-prepare-dts:
 	$(MAKE) build-typescript-legacy-typings
 
 prepublish:
-	$(MAKE) check-yarn-bug-1882
 	$(MAKE) bootstrap-only
 	$(MAKE) prepublish-build
 	IS_PUBLISH=true $(MAKE) test
@@ -213,19 +212,11 @@ publish:
 	$(YARN) release-tool publish
 	$(MAKE) clean
 
-check-yarn-bug-1882:
-ifneq ("$(shell grep 3155328e5 .yarn/releases/yarn-*.cjs -c)", "0")
-	@echo "Your version of yarn is affected by https://github.com/yarnpkg/berry/issues/1882"
-	@echo "Please run \`sed -i -e "s/3155328e5/4567890e5/g" .yarn/releases/yarn-*.cjs\`"
-	@exit 1
-endif
-
 publish-test:
 ifneq ("$(I_AM_USING_VERDACCIO)", "I_AM_SURE")
 	echo "You probably don't know what you are doing"
 	exit 1
 endif
-	$(MAKE) check-yarn-bug-1882
 	$(YARN) release-tool version $(VERSION) --all --yes --tag-version-prefix="version-e2e-test-"
 	$(MAKE) prepublish-build
 	YARN_NPM_PUBLISH_REGISTRY=http://localhost:4873 $(YARN) release-tool publish --yes --tag-version-prefix="version-e2e-test-"

package.json

@@ -16,6 +16,7 @@
     "test:runtime:bundlers": "node test/runtime-integration/bundlers.cjs",
     "test:runtime:node": "node test/runtime-integration/node.cjs"
   },
+  "packageManager": "yarn@3.0.2",
   "devDependencies": {
     "@babel/cli": "^7.14.8",
     "@babel/core": "^7.15.0",

renovate.json

@@ -64,7 +64,7 @@
       "schedule": ["before 00:05 on Friday"],
       "postUpgradeTasks": {
         "commands": [
-          "yarn install --immutable --skip-builds",
+          "yarn install --immutable --mode=skip-build",
           "yarn gulp build-rollup",
           "make test-test262-update-allowlist",
           "make test-flow-update-allowlist",

scripts/integration-tests/e2e-babel-old-version.sh

@@ -64,6 +64,6 @@ node -e "
 
 # Update deps, build and test
 rm yarn.lock
-make -j test-ci
+YARN_ENABLE_IMMUTABLE_INSTALLS=false make -j test-ci
 
 cleanup

scripts/integration-tests/e2e-babel.sh

@@ -26,6 +26,7 @@ if [ "$BABEL_8_BREAKING" = true ] ; then
 fi
 
 startLocalRegistry "$PWD"/scripts/integration-tests/verdaccio-config.yml
+
 # We only bump dependencies in the top-level package.json, because workspaces
 # already use the workspace: protocol so will get the version in the monorepo
 # and not from npm.
@@ -36,11 +37,11 @@ if [ "$BABEL_8_BREAKING" = true ] ; then
   # Jest hangs forever in the Babel 8 e2e test when using multiple workers,
   # but we don't know yet why. Until we figure it out (see
   # https://github.com/babel/babel/pull/13618) we can use --runInBand.
-  make -j build-standalone-ci
+  YARN_ENABLE_IMMUTABLE_INSTALLS=false make -j build-standalone-ci
   BABEL_ENV=test yarn jest --ci --runInBand
   make -j test-clean
 else
-  make -j test-ci
+  YARN_ENABLE_IMMUTABLE_INSTALLS=false make -j test-ci
 fi
 
 cleanup

scripts/integration-tests/e2e-jest.sh

@@ -48,6 +48,13 @@ if [ "$BABEL_8_BREAKING" = true ] ; then
   # Jest depends on @types/babel__traverse for Babel 7, and they contain the removed Noop node
   sed -i 's/t.Noop/any/g' node_modules/@types/babel__traverse/index.d.ts
   sed -i 's/t.Noop/any/g' node_modules/@types/babel__traverse/ts4.1/index.d.ts
+
+  node -e "
+    var pkg = require('./package.json');
+    pkg.resolutions || (pkg.resolutions = {});
+    pkg.resolutions['@types/babel__traverse/@babel/types'] = 'latest';
+    fs.writeFileSync('./package.json', JSON.stringify(pkg, null, 2));
+  "
 fi
 
 yarn build

scripts/integration-tests/utils/local-registry.sh

@@ -9,8 +9,8 @@ function startLocalRegistry {
   # Start local registry
   tmp_registry_log=`mktemp`
   echo "Registry output file: $tmp_registry_log"
-  (cd && nohup npx ${VERDACCIO_PACKAGE:-$default_verdaccio_package} -c $1 &>$tmp_registry_log &)
-  yarn global add verdaccio-memory@~9.7.2
+  (cd && nohup npx verdaccio@~5.1.2 -c $1 &>$tmp_registry_log &)
+  YARN_IGNORE_PATH=1 yarn global add verdaccio-memory@~10.0.0
   # Wait for Verdaccio to boot
   grep -q "http address" <(tail -f $tmp_registry_log)