retry yarn install

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

@@ -85,8 +85,13 @@ steps:
       export npm_config_arch=$(VSCODE_ARCH)
       export npm_config_node_gyp=$(which node-gyp)
       export SDKROOT=/Applications/Xcode_12.2.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX11.0.sdk
-      ls /Applications/Xcode_12.2.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/
-      CHILD_CONCURRENCY=1 yarn --frozen-lockfile --verbose
+
+      for i in {1..3}; do # try 3 times, for Terrapin
+        yarn --frozen-lockfile && break
+        echo "Yarn failed, trying again..."
+      done
+    env:
+      CHILD_CONCURRENCY: 1
     displayName: Install dependencies
     condition: and(succeeded(), ne(variables['CacheRestored'], 'true'))
 

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

@@ -74,7 +74,12 @@ steps:
 
   - script: |
       set -e
-      CHILD_CONCURRENCY=1 yarn --frozen-lockfile
+      for i in {1..3}; do # try 3 times, for Terrapin
+        yarn --frozen-lockfile && break
+        echo "Yarn failed, trying again..."
+      done
+    env:
+      CHILD_CONCURRENCY: 1
     displayName: Install dependencies
     condition: and(succeeded(), ne(variables['CacheRestored'], 'true'))
 

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

@@ -68,7 +68,13 @@ steps:
 
   - script: |
       set -e
-      CHILD_CONCURRENCY=1 npm_config_arch=$(NPM_ARCH) yarn --frozen-lockfile
+      for i in {1..3}; do # try 3 times, for Terrapin
+        yarn --frozen-lockfile && break
+        echo "Yarn failed, trying again..."
+      done
+    env:
+      CHILD_CONCURRENCY: 1
+      npm_config_arch: $(NPM_ARCH)
     displayName: Install dependencies
     condition: and(succeeded(), ne(variables['CacheRestored'], 'true'))
 

build/azure-pipelines/product-compile.yml

@@ -71,7 +71,12 @@ steps:
 
   - script: |
       set -e
-      CHILD_CONCURRENCY=1 yarn --frozen-lockfile
+      for i in {1..3}; do # try 3 times, for Terrapin
+        yarn --frozen-lockfile && break
+        echo "Yarn failed, trying again..."
+      done
+    env:
+      CHILD_CONCURRENCY: 1
     displayName: Install dependencies
     condition: and(succeeded(), ne(variables['CacheExists-Compilation'], 'true'), ne(variables['CacheRestored'], 'true'))
 

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

@@ -63,7 +63,12 @@ steps:
   #     vstsFeed: 'npm-vscode'
   - script: |
       set -e
-      CHILD_CONCURRENCY=1 yarn --frozen-lockfile
+      for i in {1..3}; do # try 3 times, for Terrapin
+        yarn --frozen-lockfile && break
+        echo "Yarn failed, trying again..."
+      done
+    env:
+      CHILD_CONCURRENCY: 1
     displayName: Install dependencies
     # condition: and(succeeded(), ne(variables['CacheRestored'], 'true'))
 

build/azure-pipelines/win32/product-build-win32-arm64.yml

@@ -70,10 +70,12 @@ steps:
 
   - powershell: |
       . build/azure-pipelines/win32/exec.ps1
+      . build/azure-pipelines/win32/retry.ps1
       $ErrorActionPreference = "Stop"
-      $env:npm_config_arch="$(VSCODE_ARCH)"
-      $env:CHILD_CONCURRENCY="1"
-      exec { yarn --frozen-lockfile }
+      retry { exec { yarn --frozen-lockfile } }
+    env:
+      npm_config_arch: $(VSCODE_ARCH)
+      CHILD_CONCURRENCY: 1
     displayName: Install dependencies
     condition: and(succeeded(), ne(variables['CacheRestored'], 'true'))
 

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

@@ -70,10 +70,12 @@ steps:
 
   - powershell: |
       . build/azure-pipelines/win32/exec.ps1
+      . build/azure-pipelines/win32/retry.ps1
       $ErrorActionPreference = "Stop"
-      $env:npm_config_arch="$(VSCODE_ARCH)"
-      $env:CHILD_CONCURRENCY="1"
-      exec { yarn --frozen-lockfile }
+      retry { exec { yarn --frozen-lockfile } }
+    env:
+      npm_config_arch: $(VSCODE_ARCH)
+      CHILD_CONCURRENCY: 1
     displayName: Install dependencies
     condition: and(succeeded(), ne(variables['CacheRestored'], 'true'))
 

build/azure-pipelines/win32/retry.ps1

+function Retry
+{
+	[CmdletBinding()]
+	param(
+		[Parameter(Position=0,Mandatory=1)][scriptblock]$cmd
+	)
+	$retry = 0
+
+	while ($retry++ -lt 3) {
+		try {
+			& $cmd
+			return
+		} catch {
+			Write-Error -ErrorRecord $_
+		}
+	}
+
+	throw "Max retries reached"
+}