Test if registry key value is null of empty in AddRegKey()

cleanW10.ps1

@@ -225,7 +225,7 @@ function AddRegKey {
             return
     }
     if ( -not $params.ContainsKey('value') ) {
-        $params.value = ""
+        $params.value = $null
     }
     if ( -not $params.ContainsKey('type') -or $params.type -eq "" ){ $params.type="DWord" }
 
@@ -251,13 +251,12 @@ function AddRegKey {
     }
 
     #Let's begin...
-    Write-Host -NoNewline "`t$($params.path.substring(0,30))...$($params.key) reg key to $($params.value) : "
+    Write-Host -NoNewline "`t$($params.path.substring(0,30))...$($params.key) reg key to '$($params.value)' : "
     if ( -not (Test-Path $params.path) ){
         Write-Host -NoNewline -ForegroundColor DarkGreen "creating path "
         try {
             New-Item -Path $params.path -Force | Out-Null
         }
-
         catch {
             Write-Host -NoNewLine -ForegroundColor Red "Error`n`t"
             Write-Host -ForegroundColor DarkRed $Error[0].Exception.Message
@@ -267,12 +266,13 @@ function AddRegKey {
 
     # Test if the key already exist
     try {
-        $current_value = Get-ItemPropertyValue -Path $params.path -Name $params.key
-        if ( $current_value -eq $params.value ) {
+        $current_value = (Get-ItemPropertyValue -Path $params.path -Name $params.key)
+        #current_value and params.value both empty need a special condition
+        if ( ( [string]::IsNullOrWhitespace($current_value) -and [string]::IsNullOrWhitespace($params.value) ) -or ($current_value -eq $params.value) ) {
             Write-Host -ForegroundColor Yellow "Already done"
             return
         }
-        else { Write-Host -NoNewline -ForegroundColor DarkGreen "old value $current_value " }
+        else { Write-Host -NoNewline -ForegroundColor DarkGreen " old value $current_value - " }
     }
     catch {
         Write-Host -NoNewline -ForegroundColor DarkGreen "new key "
@@ -319,15 +319,14 @@ function DelRegKey {
         return
     }
     try {
-        Get-ItemProperty -Path $params.path -Name $params.key 
+        Get-ItemProperty -Path $params.path -Name $params.key -ErrorAction Stop | Out-Null
     }
     catch {
-        Write-Host -ForegroundColor Yellow "key already deleted"
+        Write-Host -ForegroundColor Yellow "key not exist (already deleted?)"
         return
     }
     try {
-       
-        #Remove-ItemProperty -Path $params.path -Name $params.key
+        Remove-ItemProperty -Path $params.path -Name $params.key
         Write-host -ForegroundColor Green "done"
     }
     catch [System.Security.SecurityException]{
@@ -391,6 +390,9 @@ function UninstallModernApp {
                 )]
             [object]$params
          )
+    if ( $params.ContainsKey('removeProvisioned') -and $params.removeProvisioned -eq $true ) {
+        UninstallModernProvisionedApp $params
+    }
     if ( $params.ContainsKey('file') ) {
         $pkgs = $(Get-AppxPackage -AllUsers).name
             $uninstall_list = Get-Content $params.file | Where { $_ -notmatch "^#.*$|^$" }
@@ -414,10 +416,6 @@ function UninstallModernApp {
     }
     else {
         Write-Host -ForegroundColor Red "`tError : No name or file for action $($MyInvocation.MyCommand.Name)"
-        return
-    }
-    if ( $params.ContainsKey('removeProvisioned') -and $params.removeProvisioned -eq $true ) {
-        UninstallModernProvisionedApp $params
     }
 }
 
@@ -591,18 +589,19 @@ function ExecCommand {
           )
     $path = $params.path.Replace("##mod_path##", $script:current_module_path)
     $args = $params.arguments.Replace("##mod_path##", $script:current_module_path)
-    Write-Host -NoNewline "`tExecute : $path : "
+    Write-Host "`n`tExecute $path : "
     $path = Invoke-Expression """$($path)"""
-    if ( -not (Test-Path $path) -and -not $path -eq "powershell" ) {
-        Write-Host -ForegroundColor Yellow "File not found"
+    if ( -not ((Test-Path $path) -or $path -eq "powershell") ) {
+        Write-Host -ForegroundColor Yellow "`t`tFile not found"
         return
     }
     try {
-        Start-Process -NoNewWindow -wait -filepath $path -ArgumentList $args
+        Start-Process -NoNewWindow -wait -filepath $path -ArgumentList $args -ErrorAction Stop
+        Write-Host -ForegroundColor Green  "`t`tExecution done"
     }
     catch {
-        Write-Host -NoNewLine -ForegroundColor Red "Error`n`t"
-        write-Host -ForegroundColor DarkRed $Error[0].Exception.Message
+        Write-Host -NoNewLine -ForegroundColor Red "`tError`n`t`t"
+        Write-Host -ForegroundColor DarkRed $Error[0].Exception.Message
     }
 }
 
@@ -673,7 +672,7 @@ try {
 catch {
     Write-Host -NoNewline -ForegroundColor Red "Error while mounting Registery`n`t"
     Write-Host -ForegroundColor DarkRed $Error[0].Exception.Message
-    #return
+    return
 }
 
 #We need access to users registry hive for applying mofidication to existing users
@@ -701,14 +700,15 @@ $script:users | foreach {
             Write-Host -ForegroundColor Yellow "Already mounted"
     }
 }
-Write-Host "Folder to process : $module"
 if ( $debug ) {
     $DebugPreference = "Continue"
 }
 if ( $module -and $( Test-Path $module ) ) {
+    Write-Host "File to process : $module"
     $module | ProcessModuleFile
 }
 else {
+    Write-Host "Folder to process : $dir"
     Get-ChildItem -Path $dir -Filter "*.conf" | foreach {
         $_.FullName | ProcessModuleFile
     }
@@ -724,7 +724,7 @@ catch {
     Write-Host -NoNewline -ForegroundColor Red "Error`n`t"
         Write-Host -ForegroundColor DarkRed $Error[0].Exception.Message
 }
-0
+
 [gc]::collect()
 Write-Host "`nUnload Users hives : "
 #Unmount Registery