ci: probe credential-less net use as SYSTEM (stored cmdkey)

.gitea/workflows/runner-probe.yaml

@@ -13,23 +13,15 @@ jobs:
     runs-on: windows-latest
     timeout-minutes: 5
     steps:
-      - name: Probe
+      - name: Probe SMB as SYSTEM (credential-less net use via stored cmdkey)
         shell: pwsh
         env:
           ISO_SRC: ${{ vars.SILVERMETAL_BASE_ISO_URL }}
         run: |
-          Write-Host "host=$env:COMPUTERNAME  user=$(whoami)"
-          Write-Host "--- IPv4 (is the runner itself 10.0.0.60?) ---"
-          (Get-NetIPAddress -AddressFamily IPv4 | Where-Object { $_.IPAddress -ne '127.0.0.1' }).IPAddress
-          Write-Host "--- local filesystem drives ---"
-          Get-PSDrive -PSProvider FileSystem | Format-Table Name, @{n='UsedGB';e={[math]::Round($_.Used/1GB,1)}}, @{n='FreeGB';e={[math]::Round($_.Free/1GB,1)}}, Root -AutoSize
-          Write-Host "--- existing net use mappings ---"; cmd /c "net use"
-          Write-Host "--- stored credentials (cmdkey) ---"; cmd /c "cmdkey /list"
-          Write-Host "--- UNC reachability as SYSTEM ---"
-          Write-Host ("UNC exists = {0}" -f [bool](Test-Path -LiteralPath $env:ISO_SRC))
-          Write-Host "--- top-level dirs on each drive matching ISO/private/SILVERLABS ---"
-          Get-PSDrive -PSProvider FileSystem | ForEach-Object {
-            Get-ChildItem $_.Root -Directory -EA SilentlyContinue |
-              Where-Object Name -match 'ISO|private|SILVERLABS|template' |
-              Select-Object -ExpandProperty FullName
-          }
+          Write-Host "user=$(whoami)"
+          $root = [regex]::Match($env:ISO_SRC, '^\\\\[^\\]+\\[^\\]+').Value
+          Write-Host "--- credential-less net use $root (should consume stored SYSTEM cmdkey) ---"
+          $r = cmd /c "net use `"$root`"" 2>&1 | Out-String
+          Write-Host $r
+          Write-Host ("UNC exists after net use = {0}" -f [bool](Test-Path -LiteralPath $env:ISO_SRC))
+          cmd /c "net use `"$root`" /delete /y" 2>&1 | Out-Null