Updates Chocolatey sources that look like Nexus v2 NuGet feeds to Nexus v3 NuGet endpoints.

Update-ChocolateyNexusSource.ps1

#requires -RunAsAdministrator

function Update-ChocolateyNexusSource {
  <#
    .Synopsis
      Updates Chocolatey sources that seem to be Sonatype Nexus Repository NuGet repositories to use the v3 'Index.json'

    .Example
      Update-ChocolateyNexusSource -WhatIf
      # Preview changes that will be made.

    .Example
      Update-ChocolateyNexusSource -OutputPath C:\Temp\chocolatey.config
      # Outputs the changed file to a different location, so you can compare it.

    .Example
      Update-ChocolateyNexusSource
      # Updates the existing configuration. Will likely need to be run as an administrator.
  #>
  [CmdletBinding(SupportsShouldProcess)]
  param(
    # The path to the Chocolatey config file
    $ConfigPath = (Join-Path $env:ChocolateyInstall "config\chocolatey.config"),

    # The path to output the changed file to (defaults to $ConfigPath)
    $OutputPath = $ConfigPath
  )

  $Config = [xml]::new()
  $Config.PreserveWhitespace = $true
  $Config.Load($ConfigPath)
  $ConfigChanged = $false

  foreach ($Source in $Config.SelectNodes("//source").GetEnumerator().Where{$_.id -notin 'chocolatey', 'chocolatey.licensed'}) {
    if ($Source.Value -match "^https?://.+?/repository/.+/$" -and $PSCmdlet.ShouldProcess(
        $Source.Value,
        "Adding 'index.json'"
      )
    ) {
      $Source.Value = $Source.Value.TrimEnd('/') + '/index.json'
      $ConfigChanged = $true
    }
  }

  if ($ConfigChanged) {
    if (-not ($OutputPath | Split-Path | Test-Path)) {$null = mkdir (Split-Path $OutputPath) -Force}
    Copy-Item -Path $ConfigPath -Destination "$OutputPath.nugetv2.backup"
    $Config.Save($OutputPath)
  }
}