(scripts) Added helper script for urls without version info

scripts/Update-OnETagChanged.ps1

@@ -0,0 +1,50 @@
+# NOTE: No documentation will be written for this script.
+# This is only a temporary script until a generic version
+# have been added to the wormies-au-helpers powershell package
+
+function Update-OnETagChanged() {
+  param(
+    [uri]$execUrl,
+    [string]$saveFile = ".\info",
+    [scriptblock]$OnETagChanged,
+    [scriptblock]$OnUpdated
+  )
+
+  $request = [System.Net.WebRequest]::CreateDefault($execUrl)
+
+  try {
+    $response = $request.GetResponse()
+    $etag = $response.Headers.Get("ETag")
+  }
+  finally {
+    $response.Dispose()
+    $response = $null
+  }
+
+  $saveResult = $false
+  if (!(Test-Path $saveFile) -or ($global:au_Force -eq $true)) {
+    $result = . $OnETagChanged
+    $saveResult = $true
+  }
+  else {
+    $existingInfo = (Get-Content $saveFile -Encoding UTF8 -TotalCount 1) -split '\|'
+
+    if ($existingInfo[0] -ne $etag) {
+      $result = . $OnETagChanged
+      $saveResult = $true
+    }
+    else {
+      $result = . $OnUpdated
+      $result["Version"] = $existingInfo[1]
+      $result["ETAG"] = $existingInfo[0]
+      $saveResult = $false
+    }
+  }
+
+  if ($saveResult) {
+    $result["ETAG"] = $etag
+    "$($result["ETAG"])|$($result["Version"])" | Out-File $saveFile -Encoding utf8 -NoNewline
+  }
+
+  return $result
+}

scripts/au_extensions.psm1

@@ -7,6 +7,7 @@
 $funcs = @(
   'Set-DescriptionFromReadme'
   'Update-ChangelogVersion'
+  'Update-OnETagChanged'
 )
 
 $funcs | % {