Adds developer mode to prevent cache overwrite

cache/framework_cache.psm1

@@ -8,7 +8,17 @@
     Manually enabling the feature is no longer required.
 #>
 
+# Ensures that VS Code is not generating the cache file
+if ($null -ne $env:TERM_PROGRAM) {
+    Write-IcingaFrameworkCodeCache -DeveloperMode;
+    return;
+}
+
 Write-IcingaFrameworkCodeCache;
 
 Import-Module icinga-powershell-framework -Global -Force;
 Import-Module icinga-powershell-framework -Force;
+
+if ($null -ne $env:TERM_PROGRAM -Or $Global:Icinga.Protected.DeveloperMode) {
+    Copy-IcingaFrameworkCacheTemplate;
+}

doc/100-General/10-Changelog.md

@@ -14,6 +14,7 @@ Released closed milestones can be found on [GitHub](https://github.com/Icinga/ic
 ### Enhancements
 
 * [#40](https://github.com/Icinga/icinga-powershell-framework/issues/40) Adds support to set service recovery for the Icinga Agent and Icinga for Windows service, to restart them in case of a crash or error
+* [#525](https://github.com/Icinga/icinga-powershell-framework/pull/525) Adds new developer mode for `icinga` command and improved cache handling, to ensure within `-DeveloperMode` and inside a VS Code environment, the framework cache file is never overwritten, while still all functions are loaded and imported.
 
 ## 1.9.1 (2022-05-13)
 

icinga-powershell-framework.psm1

@@ -97,6 +97,10 @@ function Import-IcingaLib()
 
 function Write-IcingaFrameworkCodeCache()
 {
+    param (
+        [switch]$DeveloperMode = $FALSE
+    );
+
     [string]$CacheFile    = Get-IcingaFrameworkCodeCacheFile;
     [string]$directory    = Join-Path -Path $PSScriptRoot -ChildPath 'lib\';
     [string]$CacheContent = '';
@@ -109,9 +113,27 @@ function Write-IcingaFrameworkCodeCache()
         }
 
     $CacheContent += "Export-ModuleMember -Function @( '*' ) -Alias @( '*' ) -Variable @( '*' )";
+
+    if ($DeveloperMode -Or $Global:Icinga.Protected.DeveloperMode) {
+        [ScriptBlock]$CodeCache = [ScriptBlock]::Create($CacheContent);
+        . $CodeCache;
+
+        Copy-IcingaFrameworkCacheTemplate;
+        return;
+    }
+
     Set-Content -Path $CacheFile -Value $CacheContent;
 
     Remove-IcingaFrameworkDependencyFile;
+
+    if ($Global:Icinga.Protected.DeveloperMode) {
+        Copy-IcingaFrameworkCacheTemplate;
+    }
+}
+
+function Copy-IcingaFrameworkCacheTemplate()
+{
+    Copy-Item -Path (Join-Path -Path (Get-IcingaFrameworkRootPath) -ChildPath '\templates\framework_cache.psm1.template') -Destination (Get-IcingaFrameworkCodeCacheFile) -Force;
 }
 
 function Publish-IcingaEventLogDocumentation()
@@ -202,6 +224,7 @@ function Invoke-IcingaCommand()
         [switch]$Manage        = $FALSE, # Only for backwards compatibility, has no use at all
         [switch]$Shell         = $FALSE,
         [switch]$RebuildCache  = $FALSE,
+        [switch]$DeveloperMode = $FALSE,
         [array]$ArgumentList   = @()
     );
 
@@ -226,8 +249,12 @@ function Invoke-IcingaCommand()
         Write-IcingaConsoleHeader -HeaderLines $Headers;
     }
 
-    if ($RebuildCache) {
-        Write-IcingaFrameworkCodeCache;
+    if ($DeveloperMode) {
+        $Global:Icinga.Protected.DeveloperMode = $TRUE;
+    }
+
+    if ($RebuildCache -Or $DeveloperMode) {
+        Write-IcingaFrameworkCodeCache -DeveloperMode:$DeveloperMode;
     }
 
     if ($null -ne $psISE) {
@@ -247,10 +274,16 @@ function Invoke-IcingaCommand()
         $Version         = $args[2];
         $Shell           = $args[3];
         $IcingaShellArgs = $args[4];
+        $DeveloperMode   = $args[5];
 
         # Load our Icinga Framework
         Use-Icinga;
 
+        if ($DeveloperMode) {
+            $Global:Icinga.Protected.DeveloperMode = $TRUE;
+            Copy-IcingaFrameworkCacheTemplate;
+        }
+
         $Host.UI.RawUI.WindowTitle = ([string]::Format('Icinga for Windows {0}', $Version));
 
         # Set the location to the Icinga Framework module folder
@@ -274,7 +307,7 @@ function Invoke-IcingaCommand()
             return "> "
         }
 
-    } -Args $ScriptBlock, $PSScriptRoot, $IcingaFrameworkData.PrivateData.Version, ([bool]$Shell), $ArgumentList;
+    } -Args $ScriptBlock, $PSScriptRoot, $IcingaFrameworkData.PrivateData.Version, ([bool]$Shell), $ArgumentList, $DeveloperMode;
 }
 
 function Start-IcingaShellAsUser()

lib/core/framework/New-IcingaEnvironmentVariable.psm1

@@ -57,6 +57,7 @@ function New-IcingaEnvironmentVariable()
     if ($Global:Icinga.ContainsKey('Protected') -eq $FALSE) {
         $Global:Icinga.Add('Protected', @{ });
 
+        $Global:Icinga.Protected.Add('DeveloperMode', $FALSE);
         $Global:Icinga.Protected.Add('DebugMode', $FALSE);
         $Global:Icinga.Protected.Add('JEAContext', $FALSE);
         $Global:Icinga.Protected.Add('RunAsDaemon', $FALSE);

templates/framework_cache.psm1.template

@@ -0,0 +1,24 @@
+<#
+    ### Note ###
+
+    This file is shipping plain with Icinga for Windows for each version.
+    Once the module is loaded, this content will entirely be replaced with
+    all modules and components shipped by the Icinga PowerShell Framework.
+
+    Manually enabling the feature is no longer required.
+#>
+
+# Ensures that VS Code is not generating the cache file
+if ($null -ne $env:TERM_PROGRAM) {
+    Write-IcingaFrameworkCodeCache -DeveloperMode;
+    return;
+}
+
+Write-IcingaFrameworkCodeCache;
+
+Import-Module icinga-powershell-framework -Global -Force;
+Import-Module icinga-powershell-framework -Force;
+
+if ($null -ne $env:TERM_PROGRAM -Or $Global:Icinga.Protected.DeveloperMode) {
+    Copy-IcingaFrameworkCacheTemplate;
+}