Add "cascades" enforcement (#20140)

* Add "cascades" enforcement as requested by https://github.com/microsoft/vcpkg/pull/20074#issuecomment-916565430

* Add counts.

* Fix arm-uwp count.

* Update counts.

* Update counts

scripts/azure-pipelines/linux/azure-pipelines.yml

@@ -45,7 +45,7 @@ jobs:
     inputs:
       failOnStderr: true
       filePath: 'scripts/azure-pipelines/test-modified-ports.ps1'
-      arguments: '-Triplet x64-linux -BuildReason $(Build.Reason) -BinarySourceStub "$(X_VCPKG_BINARY_SOURCE_STUB)" -WorkingRoot ${{ variables.WORKING_ROOT }} -ArtifactStagingDirectory $(Build.ArtifactStagingDirectory)'
+      arguments: '-Triplet x64-linux -BuildReason $(Build.Reason) -BinarySourceStub "$(X_VCPKG_BINARY_SOURCE_STUB)" -WorkingRoot ${{ variables.WORKING_ROOT }} -ArtifactStagingDirectory $(Build.ArtifactStagingDirectory) -EnforceCascades'
       pwsh: true
   - bash: |
       df -h

scripts/azure-pipelines/osx/azure-pipelines.yml

@@ -39,7 +39,7 @@ jobs:
     inputs:
       failOnStderr: true
       filePath: 'scripts/azure-pipelines/test-modified-ports.ps1'
-      arguments: '-Triplet x64-osx -BuildReason $(Build.Reason) -BinarySourceStub "$(BINARY_SOURCE_STUB)" -WorkingRoot ${{ variables.WORKING_ROOT }} -ArtifactStagingDirectory $(Build.ArtifactStagingDirectory)'
+      arguments: '-Triplet x64-osx -BuildReason $(Build.Reason) -BinarySourceStub "$(BINARY_SOURCE_STUB)" -WorkingRoot ${{ variables.WORKING_ROOT }} -ArtifactStagingDirectory $(Build.ArtifactStagingDirectory) -EnforceCascades'
       pwsh: true
   - bash: |
       df -h

scripts/azure-pipelines/test-modified-ports.ps1

@@ -30,6 +30,9 @@ not, binary caching will default to read-write mode.
 .PARAMETER PassingIsPassing
 Indicates that 'Passing, remove from fail list' results should not be emitted as failures. (For example, this is used
 when using vcpkg to test a prerelease MSVC++ compiler)
+
+.PARAMETER EnforceCascades
+Enforces that the cascade count from ci.baseline.txt and "supports" is consistent with last known values.
 #>
 
 [CmdletBinding(DefaultParameterSetName="ArchivesRoot")]
@@ -48,7 +51,9 @@ Param(
     $BinarySourceStub = $null,
     $BuildReason = $null,
     [switch]
-    $PassingIsPassing = $false
+    $PassingIsPassing = $false,
+    [switch]
+    $EnforceCascades = $false
 )
 
 if (-Not ((Test-Path "triplets/$Triplet.cmake") -or (Test-Path "triplets/community/$Triplet.cmake"))) {
@@ -116,21 +121,59 @@ $xmlFile = Join-Path $xmlResults "$Triplet.xml"
 $failureLogs = Join-Path $ArtifactStagingDirectory 'failure-logs'
 
 & "./vcpkg$executableExtension" x-ci-clean @commonArgs
+if ($LASTEXITCODE -ne 0)
+{
+    throw "vcpkg clean failed"
+}
+
 $skipList = . "$PSScriptRoot/generate-skip-list.ps1" `
     -Triplet $Triplet `
     -BaselineFile "$PSScriptRoot/../ci.baseline.txt" `
     -SkipFailures:$skipFailures
 
+$ciArgs = $commonArgs
+if ($EnforceCascades) {
+    if ($Triplet -eq 'x86-windows') {
+        $cascades = 28
+    } elseif ($Triplet -eq 'x64-windows') {
+        $cascades = 21
+    } elseif ($Triplet -eq 'x64-windows-static') {
+        $cascades = 59
+    } elseif ($Triplet -eq 'x64-windows-static-md') {
+        $cascades = 53
+    } elseif ($Triplet -eq 'x64-uwp') {
+        $cascades = 345
+    } elseif ($Triplet -eq 'arm64-windows') {
+        $cascades = 228
+    } elseif ($Triplet -eq 'arm-uwp') {
+        $cascades = 345
+    } elseif ($Triplet -eq 'x64-osx') {
+        $cascades = 61
+    } elseif ($Triplet -eq 'x64-linux') {
+        $cascades = 31
+    } else {
+        throw "Unknown triplet ($Triplet); could not determine expected cascade count. Update test-modified-ports.ps1."
+    }
+
+    $ciArgs += @("--x-skipped-cascade-count=$cascades")
+}
+
 if ($Triplet -in @('x64-windows', 'x64-osx', 'x64-linux'))
 {
     # WORKAROUND: These triplets are native-targetting which triggers an issue in how vcpkg handles the skip list.
     # The workaround is to pass the skip list as host-excludes as well.
-    & "./vcpkg$executableExtension" ci $Triplet --x-xunit=$xmlFile --exclude=$skipList --host-exclude=$skipList --failure-logs=$failureLogs @commonArgs
+    & "./vcpkg$executableExtension" ci $Triplet --x-xunit=$xmlFile --exclude=$skipList --host-exclude=$skipList --failure-logs=$failureLogs @ciArgs
 }
 else
 {
-    & "./vcpkg$executableExtension" ci $Triplet --x-xunit=$xmlFile --exclude=$skipList --failure-logs=$failureLogs @commonArgs
+    & "./vcpkg$executableExtension" ci $Triplet --x-xunit=$xmlFile --exclude=$skipList --failure-logs=$failureLogs @ciArgs
 }
+
+if ($LASTEXITCODE -ne 0)
+{
+    throw "vcpkg ci failed"
+}
+
 & "$PSScriptRoot/analyze-test-results.ps1" -logDir $xmlResults `
     -triplet $Triplet `
     -baselineFile .\scripts\ci.baseline.txt `

scripts/azure-pipelines/windows/azure-pipelines.yml

@@ -39,7 +39,7 @@ jobs:
     inputs:
       failOnStderr: true
       filePath: 'scripts/azure-pipelines/test-modified-ports.ps1'
-      arguments: '-Triplet ${{ parameters.triplet }} -BuildReason $(Build.Reason) -BinarySourceStub "$(X_VCPKG_BINARY_SOURCE_STUB)" -WorkingRoot ${{ variables.WORKING_ROOT }} -ArtifactStagingDirectory $(Build.ArtifactStagingDirectory)'
+      arguments: '-Triplet ${{ parameters.triplet }} -BuildReason $(Build.Reason) -BinarySourceStub "$(X_VCPKG_BINARY_SOURCE_STUB)" -WorkingRoot ${{ variables.WORKING_ROOT }} -ArtifactStagingDirectory $(Build.ArtifactStagingDirectory) -EnforceCascades'
       pwsh: true
   - task: PowerShell@2
     displayName: 'Validate version files'