Merge pull request #84434 from yliaog/windows

removed powershell-yaml module dependency

cluster/gce/windows/k8s-node-setup.psm1

@@ -147,6 +147,43 @@ function Dump-DebugInfoToConsole {
   } Catch { }
 }
 
+# Converts the kube-env string in Yaml
+#
+# Returns: a PowerShell Hashtable object containing the key-value pairs from
+#   kube-env.
+function ConvertFrom-Yaml-KubeEnv {
+  param (
+    [parameter(Mandatory=$true)] [string]$kube_env_str
+  )
+  $kube_env_table = @{}
+  $currentLine = $null
+  switch -regex (${kube_env_str} -split '\r?\n') {
+      '^(\S.*)' {
+          # record start pattern, line that doesn't start with a whitespace
+          if ($null -ne $currentLine) {
+              $key, $val = $currentLine -split ":",2
+              $kube_env_table[$key] = $val.Trim("'", " ", "`"")
+          }
+          $currentLine = $matches.1
+          continue
+      }
+
+      '^(\s+.*)' {
+          # line that start with whitespace
+          $currentLine += $matches.1
+          continue
+      }
+  }
+
+  # Handle the last line if any
+  if ($currentLine) {
+      $key, $val = $currentLine -split ":",2
+      $kube_env_table[$key] = $val.Trim("'", " ", "`"")
+  }
+
+  return ${kube_env_table}
+}
+
 # Fetches the kube-env from the instance metadata.
 #
 # Returns: a PowerShell Hashtable object containing the key-value pairs from
@@ -157,13 +194,13 @@ function Fetch-KubeEnv {
   #   ${kube_env} = Get-InstanceMetadataAttribute 'kube-env'
   # or:
   #   ${kube_env} = [IO.File]::ReadAllText(".\kubeEnv.txt")
-  # ${kube_env_table} = ConvertFrom-Yaml ${kube_env}
+  # ${kube_env_table} = ConvertFrom-Yaml-KubeEnv ${kube_env}
   # ${kube_env_table}
   # ${kube_env_table}.GetType()
 
   # The type of kube_env is a powershell String.
   $kube_env = Get-InstanceMetadataAttribute 'kube-env'
-  $kube_env_table = ConvertFrom-Yaml ${kube_env}
+  $kube_env_table = ConvertFrom-Yaml-KubeEnv ${kube_env}
   return ${kube_env_table}
 }
 
@@ -238,10 +275,6 @@ function Set-PrerequisiteOptions {
   # Use TLS 1.2: needed for Invoke-WebRequest downloads from github.com.
   [Net.ServicePointManager]::SecurityProtocol = `
       [Net.SecurityProtocolType]::Tls12
-
-  # https://github.com/cloudbase/powershell-yaml
-  Log-Output "Installing powershell-yaml module from external repo"
-  Install-Module -Name powershell-yaml -Force
 }
 
 # Creates directories where other functions in this module will read and write