Azure Powershell copy but not replace app settings and connection strings for WebApps and Azure Functions

ApplyAzureSettings.ps1

#For copying Azure WebApp or Azure Functions application settings and connection strings
#This will copy from Web App, but not replace, because things like Insights, storage and existing settings
#you probably want to keep at times. Most samples I found were only complete replacements which I didn't want

#Make sure you're logged in
try{
    $acct = Get-AzureRmSubscription
}
catch{
    Login-AzureRmAccount
}
## parts are taken from
## http://jasonhaley.com/post/Azure-Help-WebApps-Copying-and-Exporting-Connection-Strings-and-App-Settings
$resourceGroupSource = 'azureResourceGroup1'
$webAppsource  = 'webAppV1'
$resourceGroupTarget  = 'azureResourceGroup1'
$webAppTarget  = 'webAppV2'

# Load Existing Web App settings for source and target (I removed slots) 
$webAppSource = Get-AzureRmWebApp -ResourceGroupName $resourceGroupSource `
    -Name $webAppsource
	# -Slot $slotSource -- Get-AzureRmWebAppSlot
$webTargetSource = Get-AzureRmWebApp -ResourceGroupName $resourceGroupSource `
    -Name $webAppTarget

	
# Get reference to the source app settings
$appSettingsSource = $webAppSource.SiteConfig.AppSettings

# Get reference to the target Existing app settings
#$appSettingsExisting = $webTargetSource.SiteConfig.AppSettings
#I'm just putting in a hash so I can use ContainsKey below

$appSettingsExisting = @{}
ForEach ($ase in $webTargetSource.SiteConfig.AppSettings) {
	$appSettingsExisting[$ase.Name] = $ase.Value
}

# Create Hash variable for App Settings
$appSettingsTarget = @{}
Write-Output 'start'


# Copy over all Existing App Settings to the Hash
ForEach ($appSettingSource in $appSettingsSource) {
 If (! $appSettingsExisting.ContainsKey($appSettingSource.Name)){
		$appSettingsTarget[$appSettingSource.Name] = $appSettingSource.Value
	 }
	 else{
		$appSettingsTarget[$appSettingSource.Name] = $appSettingsExisting[$appSettingSource.Name]
	 }
}
# Save App Settings Strings to Target
Set-AzureRmWebApp -ResourceGroupName $resourceGroupTarget -Name $webAppTarget `
    -AppSettings $appSettingsTarget

#Now do Connection strings
$connectionStringsSource  = $webAppSource.SiteConfig.ConnectionStrings

# Get reference to the target Existing app settings


$connectionStringsExisting  = @{}
ForEach ($ase in $webTargetSource.SiteConfig.ConnectionStrings) {
	$connectionStringsExisting[$ase.Name] = `
				 @{ Type = $ase.Type.ToString(); `
					Value = $ase.ConnectionString }
}
	
	
# Create Hash variable for Connection Strings
$connectionStringsTarget = @{}

# Copy over all Existing Connection Strings to the Hash
ForEach($connStringSource in $connectionStringsSource) {

	 If (! $connectionStringsExisting.ContainsKey($connStringSource.Name)){
				 $connectionStringsTarget[$connStringSource.Name] = `
				 @{ Type = $connStringSource.Type.ToString(); `
					Value = $connStringSource.ConnectionString }
	 
			#$appSettingsTarget[$appSettingSource.Name] = $appSettingSource.Value
		 }
		 else{

					
					 $connectionStringsTarget[$connStringSource.Name] = `
				 @{ Type = $connectionStringsExisting[$connStringSource.Name].Type; `
					Value = $connectionStringsExisting[$connStringSource.Name].Value }
					
			#$appSettingsTarget[$appSettingSource.Name] = $appSettingsExisting[$appSettingSource.Name]
		 }
	 
}
#Write-Output $connectionStringsExisting
#Write-Output $connectionStringsTarget
# Save Connection Strings to Target
Set-AzureRmWebApp -ResourceGroupName $resourceGroupTarget -Name $webAppTarget `
    -ConnectionStrings $connectionStringsTarget

Azure made it a bit easier now to copy settings in advanced edit mode