From d164f07fb45ffbf077ee4badb282bce7faeef293 Mon Sep 17 00:00:00 2001
From: djpbessems <danny@bessems.eu>
Date: Wed, 27 Jan 2021 16:54:32 +0100
Subject: [PATCH] Add missing yaml-parse logic

---
 scripts/Update-OvfConfiguration.ps1 | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/scripts/Update-OvfConfiguration.ps1 b/scripts/Update-OvfConfiguration.ps1
index 1d75895..07908fa 100644
--- a/scripts/Update-OvfConfiguration.ps1
+++ b/scripts/Update-OvfConfiguration.ps1
@@ -22,7 +22,24 @@ $ConvertFromYamlSplat = @{
     Yaml         = $RawContent
     AllDocuments = $True
 }
-$OVFConfig = ConvertFrom-Yaml @ConvertFromYamlSplat
+$YamlDocuments = ConvertFrom-Yaml @ConvertFromYamlSplat
+
+# Check if the respective .yml file declared substitutions which need to be parsed
+If (($YamlDocuments.Count -gt 1) -and $YamlDocuments[-1].Variables) {
+    ForEach ($Pattern in $YamlDocuments[-1].Variables) {
+        $RawContent = $RawContent -replace "\{\{ ($($Pattern.Name)) \}\}", [string](Invoke-Expression -Command $Pattern.Expression)
+    }
+    # Perform conversion to Yaml again, now with parsed file contents
+    $ConvertFromYamlSplat = @{
+        Yaml         = $RawContent
+        AllDocuments = $True
+    }
+    $YamlDocuments = ConvertFrom-Yaml @ConvertFromYamlSplat
+    $OVFConfig = $YamlDocuments[0..($YamlDocuments.Count - 2)]
+}
+Else {
+    $OVFConfig = $YamlDocuments
+}
 
 $SourceFile = Get-Item -Path $OVFFile
 $GetContentSplat = @{