chore: restore integration.ps1

Author: jinseopkim0

ci/kokoro/windows/lib/integration.ps1

@@ -4,7 +4,7 @@
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
 #
-#      https://www.apache.org/licenses/LICENSE-2.0
+#     https://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
 # distributed under the License is distributed on an "AS IS" BASIS,
@@ -14,64 +14,32 @@
 
 # Helper functions to run the minimal integration tests
 
-$PROJECT_ROOT = (Get-Item -Path ".\").FullName
+$PROJECT_ROOT = (Get-Item -Path ".\" -Verbose).FullName
 $integration_tests_config="${PROJECT_ROOT}/ci/etc/integration-tests-config.ps1"
 . "${integration_tests_config}"
 
 function Test-Integration-Enabled {
     if ((Test-Path env:KOKORO_GFILE_DIR) -and
        (Test-Path "${env:KOKORO_GFILE_DIR}/kokoro-run-key.json")) {
-       return $True
+        return $True
     }
     return $False
 }
 
 function Install-Roots-Pem {
-    $RootsPath = "${env:KOKORO_GFILE_DIR}/roots.pem"
-
+    Write-Host -ForegroundColor Yellow "`n$(Get-Date -Format o) " `
+        "Downloading roots.pem [$_]"
     ForEach($attempt in (1, 2, 3)) {
-        Write-Host -ForegroundColor Yellow "`n$(Get-Date -Format o) " `
-            "Downloading roots.pem [$attempt]"
         try {
-            # 1. Download the Mozilla Bundle
-            $WebClient = New-Object System.Net.WebClient
-            $MozillaCerts = $WebClient.DownloadString('https://curl.se/ca/cacert.pem')
-
-            # 2. Gather Windows System Root Certificates
-            # This is required because some corporate/cloud environments inspect traffic
-            # using an intermediate CA present in the system store but not in Mozilla's bundle.
-            Write-Host "Gathering Windows System Root Certificates..."
-            $WindowsCerts = ""
-            $storesToCheck = @("Root", "CA")
-            
-            foreach ($storeName in $storesToCheck) {
-                $certStore = New-Object System.Security.Cryptography.X509Certificates.X509Store -ArgumentList $storeName, "LocalMachine"
-                $certStore.Open('ReadOnly')
-                
-                $certStore.Certificates | ForEach-Object {
-                    $cert = $_
-                    $b64 = [Convert]::ToBase64String($cert.Export([System.Security.Cryptography.X509Certificates.X509ContentType]::Cert), 'InsertLineBreaks')
-                    $header = "-----BEGIN CERTIFICATE-----"
-                    $footer = "-----END CERTIFICATE-----"
-                    $WindowsCerts += "$header`n$b64`n$footer`n"
-                }
-                $certStore.Close()
-            }
-
-            # 3. Write Combined File with strict Unix Line Endings (\n)
-            # BoringSSL/gRPC can sometimes have issues with Windows CRLF.
-            Write-Host "Writing combined roots.pem with Unix LF line endings..."
-            $FinalContent = $MozillaCerts + "`n" + $WindowsCerts
-            $FinalContent = $FinalContent -replace "`r`n", "`n"
-            
-            [System.IO.File]::WriteAllText($RootsPath, $FinalContent, [System.Text.Encoding]::ASCII)
-            
+            (New-Object System.Net.WebClient).Downloadfile(
+                    'https://pki.google.com/roots.pem',
+                    "${env:KOKORO_GFILE_DIR}/roots.pem")
             return
         } catch {
-            Write-Host -ForegroundColor Yellow "`n$(Get-Date -Format o) download/setup error: $_"
+            Write-Host -ForegroundColor Yellow "`n$(Get-Date -Format o) download error"
         }
         Start-Sleep -Seconds (60 * $attempt)
     }
-    Write-Host -ForegroundColor Red "cannot setup roots.pem file."
+    Write-Host -ForegroundColor Red "cannot download roots.pem file."
     Exit 1
 }