chore: migrate to yarn modern

Author: mainframev

.github/actions/run-publish-vr-screenshot/action.yml

@@ -38,7 +38,7 @@ runs:
         cache: 'yarn'
         node-version: '20'
 
-    - run: yarn install --frozen-lockfile
+    - run: yarn install --immutable
       shell: bash
 
     - run: yarn playwright install --with-deps

.github/workflows/bundle-size-base.yml

@@ -31,7 +31,7 @@ jobs:
           cache: 'yarn'
           node-version: '22'
 
-      - run: yarn install --frozen-lockfile
+      - run: yarn install --immutable
 
       - name: Build all packages & create reports (non-PR)
         run: yarn nx run-many -t bundle-size --nxBail

.github/workflows/bundle-size.yml

@@ -39,7 +39,7 @@ jobs:
 
       - run: echo number of CPUs "$(getconf _NPROCESSORS_ONLN)"
 
-      - run: yarn install --frozen-lockfile
+      - run: yarn install --immutable
 
       - name: Build packages & create reports
         run: yarn nx affected -t bundle-size --nxBail

.github/workflows/check-packages.yml

@@ -22,12 +22,15 @@ jobs:
           files: |
             yarn.lock
 
+      - run: yarn install --immutable
+        if: steps.changed-files-specific.outputs.any_changed == 'true'
+
       - name: Check package duplicates
         if: steps.changed-files-specific.outputs.any_changed == 'true'
         run: |
           echo "yarn.lock changed! Verifying package deduplication ..."
 
-          yarn run dedupe --list --fail
+          yarn run dedupe --check --json
 
           if [[ $? -ne 0 ]]; then
             echo "Your changes introduced package duplication 🚨"

.github/workflows/check-tooling.yml

@@ -28,7 +28,7 @@ jobs:
         with:
           node-version: '22'
 
-      - run: yarn install --frozen-lockfile
+      - run: yarn install --immutable
 
       - run: yarn nx run scripts-executors:test -t 'smoke test'
 
@@ -39,12 +39,31 @@ jobs:
       # pre-build react-jsx-runtime - as generate-api executor doesn't provide copy assets capability
       - run: yarn nx run react-jsx-runtime:build
 
+      # Generators create/remove packages and modify the lockfile, so immutable installs must be disabled
       - run: yarn nx g @fluentui/workspace-plugin:react-library --name hello-world --owner '@microsoft/fluentui-react-build' --kind standard --no-interactive
+        env:
+          YARN_ENABLE_IMMUTABLE_INSTALLS: false
       - run: yarn nx g @fluentui/workspace-plugin:react-component --project hello-world-preview --name Aiur --no-interactive
+        env:
+          YARN_ENABLE_IMMUTABLE_INSTALLS: false
       - run: yarn nx g @fluentui/workspace-plugin:cypress-component-configuration --project hello-world-preview --no-interactive
+        env:
+          YARN_ENABLE_IMMUTABLE_INSTALLS: false
       - run: yarn nx g @fluentui/workspace-plugin:bundle-size-configuration --project hello-world-preview --no-interactive
+        env:
+          YARN_ENABLE_IMMUTABLE_INSTALLS: false
       - run: yarn nx g @fluentui/workspace-plugin:prepare-initial-release --project hello-world-preview --phase=preview --no-interactive
+        env:
+          YARN_ENABLE_IMMUTABLE_INSTALLS: false
       - run: yarn nx g @fluentui/workspace-plugin:prepare-initial-release --project hello-world-preview --phase=stable --no-interactive
+        env:
+          YARN_ENABLE_IMMUTABLE_INSTALLS: false
       - run: yarn nx g @nx/workspace:remove --project hello-world --forceRemove --no-interactive
+        env:
+          YARN_ENABLE_IMMUTABLE_INSTALLS: false
       - run: yarn nx g @nx/workspace:remove --project hello-world-stories --forceRemove --no-interactive
+        env:
+          YARN_ENABLE_IMMUTABLE_INSTALLS: false
       - run: yarn nx g @fluentui/workspace-plugin:tsconfig-base-all --no-interactive
+        env:
+          YARN_ENABLE_IMMUTABLE_INSTALLS: false

.github/workflows/copilot-setup-steps.yml

@@ -29,4 +29,4 @@ jobs:
           cache: 'yarn'
           node-version: '22'
 
-      - run: yarn install --frozen-lockfile
+      - run: yarn install --immutable

.github/workflows/docsite-publish-ghpages.yml

@@ -29,7 +29,7 @@ jobs:
           cache: 'yarn'
 
       - name: Install packages
-        run: yarn install --frozen-lockfile
+        run: yarn install --immutable
 
       - name: Install Playwright Browsers
         run: yarn playwright install --with-deps

.github/workflows/pr-vrt.yml

@@ -40,7 +40,7 @@ jobs:
           cache: 'yarn'
           node-version: '22'
 
-      - run: yarn install --frozen-lockfile
+      - run: yarn install --immutable
       - run: yarn playwright install --with-deps
 
       - name: Run VR tests (generate screenshots)

.github/workflows/pr-website-deploy.yml

@@ -41,7 +41,7 @@ jobs:
       - name: NodeJS heap default size
         run: node -e 'console.log(v8.getHeapStatistics().heap_size_limit / 1024 / 1024 + " MB");'
 
-      - run: yarn install --frozen-lockfile
+      - run: yarn install --immutable
 
       - name: Install Playwright Browsers
         run: yarn playwright install --with-deps

.github/workflows/pr.yml

@@ -46,7 +46,7 @@ jobs:
 
       - run: echo number of CPUs "$(getconf _NPROCESSORS_ONLN)"
 
-      - run: yarn install --frozen-lockfile
+      - run: yarn install --immutable
 
       - name: Workspace lint
         run: |
@@ -102,7 +102,8 @@ jobs:
       - run: echo number of CPUs "$(getconf _NPROCESSORS_ONLN)"
 
       - run: |
-          yarn install --frozen-lockfile
+          yarn install --immutable
+      - run: |
           yarn rit --react 17 --install-deps
           yarn rit --react 18 --install-deps
 
@@ -158,7 +159,7 @@ jobs:
 
       - run: echo number of CPUs "$(getconf _NPROCESSORS_ONLN)"
 
-      - run: yarn install --frozen-lockfile
+      - run: yarn install --immutable
 
       - name: Install Playwright dependencies
         run: yarn playwright install --with-deps