fix(installer): harden install-policy checks and packaging-lint workflow

.github/workflows/packaging-lint.yml

@@ -30,6 +30,8 @@ jobs:
     runs-on: windows-latest
     steps:
       - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          persist-credentials: false
       - name: Install the pinned packaging toolchain
         shell: pwsh
         run: |
@@ -37,8 +39,11 @@ jobs:
           dotnet tool install --tool-path $tools wix --version 5.0.2
           if ($LASTEXITCODE -ne 0) { throw 'WiX installation failed.' }
           $tools >> $env:GITHUB_PATH
-          & (Join-Path $tools 'wix.exe') extension add -g WixToolset.UI.wixext/5.0.2 WixToolset.Util.wixext/5.0.2
-          if ($LASTEXITCODE -ne 0) { throw 'WiX extension installation failed.' }
+          $policy = Get-Content -Raw -LiteralPath packaging/windows/install-policy.json | ConvertFrom-Json
+          foreach ($extension in @($policy.extensions)) {
+            & (Join-Path $tools 'wix.exe') extension add -g "WixToolset.$extension.wixext/5.0.2"
+            if ($LASTEXITCODE -ne 0) { throw "WiX extension $extension installation failed." }
+          }
       - name: Build and check non-executable installer fixtures
         shell: pwsh
         run: ./packaging/windows/test-install-policy.ps1 -OutputDirectory (Join-Path $env:RUNNER_TEMP 'craft-install-policy-tests')

packaging/windows/check-install-policy.ps1

@@ -122,9 +122,11 @@ try {
       Set-SessionProperty $session 'CRAFT_USER_DIR' 'D:\Existing user app'
       Set-SessionProperty $session 'CRAFT_MACHINE_DIR' 'E:\Existing machine app'
       $action = if ($scope -eq '1') { 'CraftRestoreMachineFolder' } else { 'CraftRestoreUserFolder' }
-      if (-not $explicit) {
-        if ($session.DoAction($action) -ne 1) { throw 'Remembered-folder property action failed.' }
-      }
+      # Evaluate the compiled condition, so the test exercises it instead of calling the action directly.
+      $restore = @(Read-Rows $database ('SELECT `Condition` FROM `InstallExecuteSequence` WHERE `Action` = ''{0}''' -f $action) 1)[0]
+      $selected = $session.EvaluateCondition($restore[0]) -eq 1
+      if ($selected -eq [bool]$explicit) { throw "$action must run only when no folder was supplied (condition: $($restore[0]))." }
+      if ($selected -and $session.DoAction($action) -ne 1) { throw 'Remembered-folder property action failed.' }
       $expected = if ($explicit) { $explicit } elseif ($scope -eq '1') { 'E:\Existing machine app' } else { 'D:\Existing user app' }
       if ((Get-SessionProperty $session 'INSTALLFOLDER') -ne $expected) { throw 'Custom or remembered folder was not preserved.' }
     }
@@ -145,6 +147,11 @@ try {
       throw 'Silent updates must restore the folder before directory costing.'
     }
   }
+  foreach ($resolver in @('CraftUFromLegacyExe','CraftMFromLegacyExe')) {
+    if (-not ($execute['AppSearch'] -lt $execute[$resolver] -and $execute[$resolver] -lt $execute['LaunchConditions'])) {
+      throw 'Both legacy folder resolvers must run after AppSearch and before the launch checks.'
+    }
+  }
   # Switching the first-page choice must reset BOTH properties, including a back-and-forth change.
   $events = @(Read-Rows $database 'SELECT `Event`, `Argument`, `Condition`, `Ordering` FROM `ControlEvent` WHERE `Dialog_` = ''CraftScopeDlg'' AND `Control_` = ''Next'' ORDER BY `Ordering`' 4)
   # Model the full-UI upgrade entry with an existing machine-wide copy. Run

packaging/windows/test-install-policy.ps1

@@ -38,7 +38,7 @@ foreach ($arch in $Architectures) {
   $sources = @($policy.sources | ForEach-Object { Join-Path $PSScriptRoot $_ })
   $msi = Join-Path $stage "$($policy.id)-NOT-INSTALLABLE.msi"
   $extensions = @($policy.extensions | ForEach-Object { '-ext'; "WixToolset.$_.wixext" })
-  & wix build @sources -arch $arch -wx @extensions `
+  & wix build @sources -arch $arch @extensions `
     -culture en-US -d 'Version=0.0.1' -d 'DisplayVersion=0.0.1-metadata-test' `
     -d "BinDir=$stage" -d "IconPath=$(Join-Path $root $policy.icon)" `
     -d "DocsDir=$(Join-Path $stage 'docs')" -d "ModelsDir=$(Join-Path $stage 'models')" `