Pre-Parsing Scripts

PreParsing Scripts

It isn't always possible to run a script to see if a change you made broke it.  In those cases, you can get PowerShell to tell you if there are obvious syntax errors using a script like this:

# Contents of file Test-Script.ps1
param($path, [switch]$verbose)

if ($verbose) {
    $VerbosePreference = 'Continue'
}

trap { Write-Warning $_; $false; continue }
& `
{
    $contents = get-content $path
    $contents = [string]::Join([Environment]::NewLine, $contents)
    [void]$ExecutionContext.InvokeCommand.NewScriptBlock($contents)
    Write-Verbose "Parsed without errors"
    $true
}

Note that this will not catch runtime errors but it is better than not doing any checking at all.