Bootstrap yarn to fix/enable CFSClean3. (#14284)

Author: sean-mcmanus

Build/cg/cg.yml

@@ -61,7 +61,7 @@ extends:
     featureFlags:
       autoBaseline: false
     settings:
-      networkIsolationPolicy: Permissive,CFSClean,CFSClean2
+      networkIsolationPolicy: Permissive,CFSClean,CFSClean2,CFSClean3
 
     stages:
     - stage: build
@@ -81,9 +81,6 @@ extends:
         steps:
         - checkout: self
 
-        - task: geeklearningio.gl-vsts-tasks-yarn.yarn-installer-task.YarnInstaller@3
-          displayName: Use Yarn 1.x
-
         - task: UseNode@1
           displayName: Use Node 22.x
           inputs:
@@ -102,9 +99,9 @@ extends:
             script: |
               export SRC_DIR=$(echo $BUILD_SOURCESDIRECTORY | sed 's|\\|/|g')
               cd "$SRC_DIR/Extension"
-              yarn run vsix-prepublish
+              npm run vsix-prepublish
               if [ $? -ne 0 ]; then
-                echo "yarn run vsix-prepublish failed, sleeping for 30s before retrying..."
+                echo "npm run vsix-prepublish failed, sleeping for 30s before retrying..."
                 sleep 30
                 exit 1
               fi

Build/package/cpptools_extension_pack.yml

@@ -32,7 +32,7 @@ extends:
         image: 1ESPT-Windows2022
         os: windows
     settings:
-      networkIsolationPolicy: Permissive,CFSClean,CFSClean2
+      networkIsolationPolicy: Permissive,CFSClean,CFSClean2,CFSClean3
 
     stages:
     - stage: package

Build/package/cpptools_themes.yml

@@ -32,7 +32,7 @@ extends:
         image: 1ESPT-Windows2022
         os: windows
     settings:
-      networkIsolationPolicy: Permissive,CFSClean,CFSClean2
+      networkIsolationPolicy: Permissive,CFSClean,CFSClean2,CFSClean3
 
     stages:
     - stage: package

Extension/.yarn-bootstrap/package-lock.json

@@ -0,0 +1,10 @@
+{
+    "name": "cpptools-yarn-bootstrap",
+    "private": true,
+    "version": "1.0.0",
+    "description": "Install Yarn from internal npm feed for repository bootstrap.",
+    "license": "SEE LICENSE IN LICENSE.txt",
+    "devDependencies": {
+        "yarn": "1.22.22"
+    }
+}

Extension/.yarn-bootstrap/package.json

@@ -6781,6 +6781,8 @@
         ]
     },
     "scripts": {
+        "bootstrap": "npm run bootstrap:yarn && yarn install --frozen-lockfile",
+        "bootstrap:yarn": "npm install -g yarn@1.22.22 --registry=https://pkgs.dev.azure.com/azure-public/VisualCpp/_packaging/cpp_PublicPackages/npm/registry/",
         "scripts": "ts-node -T .scripts/scripts.ts",
         "show": "ts-node -T .scripts/clean.ts show",
         "clean": "ts-node -T .scripts/clean.ts",
@@ -6792,7 +6794,7 @@
         "compile": "yarn install && (yarn verify prep --quiet || yarn prep) && yarn build",
         "watch": "yarn install && (yarn verify prep --quiet || yarn prep) && tsc --build tsconfig.json --watch",
         "rebuild": "yarn install && yarn clean && yarn prep && yarn build",
-        "vsix-prepublish": "yarn install && yarn clean && yarn webpack",
+        "vsix-prepublish": "npm run bootstrap && yarn clean && yarn webpack",
         "webpack": "yarn install && (yarn verify prep --quiet || yarn prep) && tsc --build ui.tsconfig.json && webpack --mode production --env vscode_nls",
         "generate-native-strings": "ts-node -T ./.scripts/generateNativeStrings.ts",
         "generate-options-schema": "ts-node -T ./.scripts/generateOptionsSchema.ts",

Extension/package.json

@@ -35,15 +35,20 @@
 ### Required Tools 
 
 * [Node.js](https://nodejs.org/en/download/) v16.*
-* Yarn - use `npm install -g yarn` to install
+* npm (comes with Node.js)
 
 ### Setting up the repository
 
 `git clone https://github.com/microsoft/vscode-cpptools.git`
 
-`yarn install`
+`cd vscode-cpptools/Extension`
 
-It's also good practice to run `yarn install` after merging from upstream or switching branches. 
+`npm run bootstrap`
+
+`npm run bootstrap` installs Yarn `1.22.22` globally from the internal npm feed and then runs `yarn install --frozen-lockfile`.
+On some systems, global npm install may require elevated permissions.
+
+It's also good practice to run `npm run bootstrap` after merging from upstream or switching branches. 
 
 ## Building the Extension
 
@@ -336,4 +341,4 @@ This will use webpack to build the extension. This is only necessary when packag
 
 Installs the VS Code `*.d.ts` files and then runs `yarn prep`
 
-You should run `yarn install` after merging from upstream or switching branches. 
+You should run `npm run bootstrap` after merging from upstream or switching branches.