Templates/PSJumpStartStdTemplate.ps1

 <#
    .Synopsis
       Template
    .DESCRIPTION
       This template will load $PSDefaultParameterValues and the PSJumpStart module
       and has support for Write-Verbose, -WhatIf and whatnot.
    .Notes
       Author date
       Changes
#>

[CmdletBinding(SupportsShouldProcess = $True)]
param ()

#region local functions
function Get-LocalDefaultVariables {
     <#
    .Synopsis
        Load default arguemts for this PS-file.
    .DESCRIPTION
        Get setting files according to load order and set variables.
        Command prompt arguments will override any file settings
    .PARAMETER CallerInvocation
        $MyInvocation of calling code session
    .PARAMETER defineNew
        Add ALL variables found in setting files
    .PARAMETER overWriteExisting
        Turns the table for variable handling file content will override command line arguments
    #>

    [CmdletBinding(SupportsShouldProcess = $False)]
    param(
        [parameter(Position=0,mandatory=$true)]
        $CallerInvocation,
        [switch]$defineNew,
        [switch]$overWriteExisting
    )
    foreach($settingsFile in (Get-SettingsFiles $CallerInvocation ".json")) {        
        if (Test-Path $settingsFile) {        
            Write-Verbose "$($MyInvocation.Mycommand) reading: [$settingsFile]"
            $DefaultParamters = Get-Content -Path $settingsFile -Encoding UTF8 | ConvertFrom-Json | Set-ValuesFromExpressions
            ForEach($property in $DefaultParamters.psobject.properties.name) {
                #Exclude PSDefaultParameterValues ("functionName:Variable":"Value")
                if (($property).IndexOf(':') -eq -1) {
                    $var = Get-Variable $property -ErrorAction SilentlyContinue
                    $value = $DefaultParamters.$property
                    if (!$var) {
                        if ($defineNew) {
                            Write-Verbose "New Var: $property"
                            $var = New-Variable -Name  $property -Value $value -Scope 1
                        }
                    } else {
                        #We only overwrite non-set values if not forced
                        if (!($var.Value) -or $overWriteExisting)
                        {
                            try {                
                                Write-Verbose "Var: $property" 
                                $var.Value = $value
                            } Catch {
                                $ex = $PSItem
                                $ex.ErrorDetails = "Err adding $property from $settingsFile. " + $PSItem.Exception.Message
                                throw $ex
                            }
                        }
                    }
                }
            }
        } else {
            Write-Verbose "File not found: [$settingsFile]"
        }
    }
}
#endregion

#region Init
$scriptPath = Split-Path -Parent $MyInvocation.MyCommand.Definition
if (-not (Get-Module PSJumpStart)) {
   Import-Module PSJumpStart -Force -MinimumVersion 1.3.0
}

Get-LocalDefaultVariables $MyInvocation -defineNew

#Get global deafult settings when calling modules
$PSDefaultParameterValues = Get-GlobalDefaultsFromJsonFiles $MyInvocation -Verbose:$VerbosePreference

#endregion

Msg "Start Execution"

Write-Verbose "Script is in $scriptPath"

if ($pscmdlet.ShouldProcess("ActiveCode", "Run Code")) {
    #Put your commands/code here...
}

#Show any errors (but not variable not found)
if ($Error -ne $null) { foreach ($err in $Error) {if ($err -notmatch "Cannot find a variable with the name") {
    Write-Verbose "Err: - `n$err `n $($err.ScriptStackTrace) `n`n$($err.InvocationInfo.PositionMessage)`n`n"
}}}

Msg "End Execution"