PowerShell_Scripts/Edit-MyScript.ps1

[CmdletBinding(SupportsShouldProcess)]param(
  [ArgumentCompleter({ param (
      $commandName,
      $parameterName,
      $wordToComplete,
      $commandAst,
      $fakeBoundParameters
    )
    [FunctionName]::_GetValidValues($wordToComplete,$true)
  })]
  [string[]]$ImportFunction,
  [switch]$ForceImport,
  [Parameter(Position = 0, ValueFromRemainingArguments = $true)]
  [ArgumentCompleter({ param (
      $commandName,
      $parameterName,
      $wordToComplete,
      $commandAst,
      $fakeBoundParameters
    )
    [MyScript]::_GetValidValues($wordToComplete,$false)
  })]
  [string[]]$ScriptName
)

$local:ScriptPaths = @()
foreach( $local:p in $ImportFunction ) {
  $local:f = Get-Command $p -Type Function
  if( $f ) {
    $local:sp = Join-Path $MyPSScriptRoot "$p`.ps1"
    if( $ForceImport -or -not (Test-Path $sp) ) {
      Export-FunctionSource $p -NoHeader > $sp
    } elseif ( -not $ForceImport ) {
      throw "$p already exists in Script, to import the function again, use the -Force"
    }
    $ScriptPaths += $sp
  }
}
foreach( $local:p in $ScriptName ) {
  $local:sp = Join-Path $MyPSScriptRoot "$p`.ps1"
  $ScriptPaths += $sp
}

if( -not $ScriptPaths ) {
  $ScriptPaths += $MyPSScriptRoot
}

Edit-TextFile $ScriptPaths

Get-Command Reload-MyScripts -ErrorAction SilentlyContinue |
  ForEach-Object { . $_.Definition }