Add generate-sas-tokens script. (#31842)

scripts/azure-pipelines/generate-sas-tokens.ps1

@@ -0,0 +1,54 @@
+
+function Get-SasToken {
+    Param(
+        [Parameter(Mandatory=$true)]
+        [int]$KeyNumber,
+        [Parameter(Mandatory=$true)]
+        [ValidateNotNullOrEmpty()]
+        [string]$ResourceGroupName,
+        [Parameter(Mandatory=$true)]
+        [ValidateNotNullOrEmpty()]
+        [string]$StorageAccountName,
+        [Parameter(Mandatory=$true)]
+        [ValidateNotNullOrEmpty()]
+        [string]$ContainerName,
+        [Parameter(Mandatory=$true)]
+        [ValidateNotNullOrEmpty()]
+        [string]$Permission
+    )
+
+    $keys = Get-AzStorageAccountKey -ResourceGroupName $ResourceGroupName -Name $StorageAccountName
+    $key = $keys[$KeyNumber - 1]
+    $ctx = New-AzStorageContext -StorageAccountName $StorageAccountName -StorageAccountKey $key.Value
+    $start = Get-Date -AsUTC
+    $end = $start.AddDays(90)
+    $token = New-AzStorageContainerSASToken -Name $ContainerName -Permission $Permission -StartTime $start -ExpiryTime $end -Context $ctx
+    return $token.Substring(1)
+}
+
+# Asset Cache:
+# Read, Create, List
+$assetSas = Get-SasToken -KeyNumber 1 -ResourceGroupName vcpkg-asset-cache -StorageAccountName vcpkgassetcacheeastasia -ContainerName cache -Permission rcl
+
+# Binary Cache:
+# Read, Create, List, Write
+$binarySas = Get-SasToken -KeyNumber 1 -ResourceGroupName vcpkg-binary-cache -StorageAccountName vcpkgbinarycache -ContainerName cache -Permission rclw
+$binaryEASas = Get-SasToken -KeyNumber 1 -ResourceGroupName vcpkg-binary-cache -StorageAccountName vcpkgbinarycacheeastasia -ContainerName cache -Permission rclw
+
+$response = "Asset Cache SAS: Update`n" + `
+    "https://dev.azure.com/vcpkg/public/_library?itemType=VariableGroups&view=VariableGroupView&variableGroupId=6&path=vcpkg-asset-caching-credentials`n" + `
+    "and`n" + `
+    "https://devdiv.visualstudio.com/DefaultCollection/DevDiv/_library?itemType=VariableGroups&view=VariableGroupView&variableGroupId=355&path=vcpkg-asset-caching-credentials`n" + `
+    "`n" + `
+    "token:`n" + `
+    "$assetSas`n" + `
+    "`n" + `
+    "Binary Cache SAS: Update`n" + `
+    "https://dev.azure.com/vcpkg/public/_library?itemType=VariableGroups&view=VariableGroupView&variableGroupId=8&path=vcpkg-binary-caching-credentials`n" + `
+    "`n" + `
+    "sas-bin:`n" + `
+    "$binarySas`n" + `
+    "sas-bin-ea:`n" + `
+    "$binaryEASas`n"
+
+Write-Host $response

scripts/azure-pipelines/patch-tuesday-checklist.md

@@ -19,3 +19,5 @@
 * [ ] Submit PR with those changes.
 * [ ] Submit a full CI rebuild with those changes: https://dev.azure.com/vcpkg/public/_build?definitionId=29  
       refs/pull/NUMBER/head
+* [ ] Run `generate-sas-tokens.ps1` and update the relevant libraries on dev.azure.com/vcpkg and
+      devdiv.visualstudio.com.