InvokeDynamic enabler for Groovy on windows. Place it on <groovydir>/bin and run.

indynize.ps1

#
# indynize.ps1: InvokeDynamic enabler for Groovy on windows.
#
# AUTHOR(S): Masashi Fujita <objectxtreme@gmail.com>
#

param ([switch]$WhatIf = $false, [switch]$Verbose = $false)

$groovydir = Split-Path -parent $MyInvocation.MyCommand.Path | Split-Path -parent

$libdir = Join-Path $groovydir "lib"

$orig_libdir = "$libdir.orig"

$indy_dir = Join-Path $groovydir "indy"

if (-not $(Test-Path $orig_libdir)) {
    Move-Item -WhatIf:$WhatIf -Verbose:$Verbose $libdir $orig_libdir
}
else {
    Remove-Item -WhatIf:$WhatIf -Verbose:$Verbose -Recurse -Force $libdir
}

$null = New-Item -ItemType Directory -WhatIf:$WhatIf -Verbose:$Verbose $libdir

foreach ($indy in Get-ChildItem "$indy_dir\*.jar") {
    $t = $(Split-Path -leaf $indy) -replace "-indy.jar",".jar"
    Copy-Item -WhatIf:$WhatIf -Verbose:$Verbose $indy $(Join-Path $libdir $t)
}

foreach ($orig in Get-ChildItem "$orig_libdir\*.jar") {
    $dst = Join-Path $libdir $(Split-Path -leaf $orig)
    if (Test-Path $dst) {
        if ($Verbose) {
            Write-Host -ForegroundColor yellow "Skip copying $orig"
        }
    }
    else {
        Copy-Item -WhatIf:$WhatIf -Verbose:$Verbose $orig $dst
    }
}

exit 0