fixes #145397

build/azure-pipelines/darwin/product-build-darwin-sign.yml

@@ -38,7 +38,7 @@ steps:
   - script: |
       set -e
       for i in {1..3}; do # try 3 times, for Terrapin
-        yarn --cwd build --frozen-lockfile && break
+        yarn --cwd build --frozen-lockfile --check-files && break
         if [ $i -eq 3 ]; then
           echo "Yarn failed too many times" >&2
           exit 1

build/azure-pipelines/darwin/product-build-darwin.yml

@@ -81,7 +81,7 @@ steps:
       export npm_config_node_gyp=$(which node-gyp)
 
       for i in {1..3}; do # try 3 times, for Terrapin
-        yarn --frozen-lockfile && break
+        yarn --frozen-lockfile --check-files && break
         if [ $i -eq 3 ]; then
           echo "Yarn failed too many times" >&2
           exit 1

build/azure-pipelines/linux/product-build-alpine.yml

@@ -76,7 +76,7 @@ steps:
   - script: |
       set -e
       for i in {1..3}; do # try 3 times, for Terrapin
-        yarn --frozen-lockfile && break
+        yarn --frozen-lockfile --check-files --check-files && break
         if [ $i -eq 3 ]; then
           echo "Yarn failed too many times" >&2
           exit 1

build/azure-pipelines/linux/product-build-linux-client.yml

@@ -84,7 +84,7 @@ steps:
   - script: |
       set -e
       for i in {1..3}; do # try 3 times, for Terrapin
-        yarn --cwd build --frozen-lockfile && break
+        yarn --cwd build --frozen-lockfile --check-files && break
         if [ $i -eq 3 ]; then
           echo "Yarn failed too many times" >&2
           exit 1
@@ -121,7 +121,7 @@ steps:
       fi
 
       for i in {1..3}; do # try 3 times, for Terrapin
-        yarn --frozen-lockfile && break
+        yarn --frozen-lockfile --check-files && break
         if [ $i -eq 3 ]; then
           echo "Yarn failed too many times" >&2
           exit 1

build/azure-pipelines/linux/product-build-linux-server.yml

@@ -40,7 +40,7 @@ steps:
       export npm_config_arch=$(NPM_ARCH)
 
       for i in {1..3}; do # try 3 times, for Terrapin
-        yarn --cwd remote --frozen-lockfile && break
+        yarn --cwd remote --frozen-lockfile --check-files && break
         if [ $i -eq 3 ]; then
           echo "Yarn failed too many times" >&2
           exit 1

build/azure-pipelines/product-compile.yml

@@ -64,7 +64,7 @@ steps:
   - script: |
       set -e
       for i in {1..3}; do # try 3 times, for Terrapin
-        yarn --frozen-lockfile && break
+        yarn --frozen-lockfile --check-files && break
         if [ $i -eq 3 ]; then
           echo "Yarn failed too many times" >&2
           exit 1

build/azure-pipelines/sdl-scan.yml

@@ -84,7 +84,7 @@ stages:
             inputs:
               sourceCodeDirectory: "$(Build.SourcesDirectory)"
               language: "cpp"
-              buildCommandsString: "yarn --frozen-lockfile"
+              buildCommandsString: "yarn --frozen-lockfile --check-files"
               querySuite: "Required"
               timeout: "1800"
               ram: "16384"
@@ -99,7 +99,7 @@ stages:
               . build/azure-pipelines/win32/exec.ps1
               . build/azure-pipelines/win32/retry.ps1
               $ErrorActionPreference = "Stop"
-              retry { exec { yarn --frozen-lockfile } }
+              retry { exec { yarn --frozen-lockfile --check-files } }
             env:
               npm_config_arch: "$(NPM_ARCH)"
               PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD: 1
@@ -176,7 +176,7 @@ stages:
           - script: |
               set -e
               for i in {1..3}; do # try 3 times, for Terrapin
-                yarn --cwd build --frozen-lockfile && break
+                yarn --cwd build --frozen-lockfile --check-files && break
                 if [ $i -eq 3 ]; then
                   echo "Yarn failed too many times" >&2
                   exit 1
@@ -209,7 +209,7 @@ stages:
               fi
 
               for i in {1..3}; do # try 3 times, for Terrapin
-                yarn --frozen-lockfile && break
+                yarn --frozen-lockfile --check-files && break
                 if [ $i -eq 3 ]; then
                   echo "Yarn failed too many times" >&2
                   exit 1

build/azure-pipelines/web/product-build-web.yml

@@ -67,7 +67,7 @@ steps:
   - script: |
       set -e
       for i in {1..3}; do # try 3 times, for Terrapin
-        yarn --frozen-lockfile && break
+        yarn --frozen-lockfile --check-files && break
         if [ $i -eq 3 ]; then
           echo "Yarn failed too many times" >&2
           exit 1

build/azure-pipelines/win32/product-build-win32.yml

@@ -77,7 +77,7 @@ steps:
       $ErrorActionPreference = "Stop"
       $env:npm_config_arch="$(VSCODE_ARCH)"
       $env:CHILD_CONCURRENCY="1"
-      retry { exec { yarn --frozen-lockfile } }
+      retry { exec { yarn --frozen-lockfile --check-files } }
     env:
       ELECTRON_SKIP_BINARY_DOWNLOAD: 1
       PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD: 1

build/npm/postinstall.js

@@ -20,7 +20,7 @@ function yarnInstall(location, opts) {
 	const raw = process.env['npm_config_argv'] || '{}';
 	const argv = JSON.parse(raw);
 	const original = argv.original || [];
-	const args = original.filter(arg => arg === '--ignore-optional' || arg === '--frozen-lockfile');
+	const args = original.filter(arg => arg === '--ignore-optional' || arg === '--frozen-lockfile' || arg === '--check-files');
 	if (opts.ignoreEngines) {
 		args.push('--ignore-engines');
 		delete opts.ignoreEngines;