Vamp Plugin Tester

<#

.SYNOPSIS

A simple manager for third-party source code dependencies.

Run "vext help" for more documentation.

#>

Set-StrictMode -Version 2.0

$ErrorActionPreference = "Stop"

$sml = $env:VEXT_SML

$mydir = Split-Path $MyInvocation.MyCommand.Path -Parent

$program = "$mydir/vext.sml"

# We need either Poly/ML or SML/NJ. No great preference as to which.

if (!$sml) {

    if (Get-Command "sml" -ErrorAction SilentlyContinue) {

       $sml = "smlnj"

    } elseif (Get-Command "polyml" -ErrorAction SilentlyContinue) {

       $sml = "poly"

    } else {

       echo @"

ERROR: No supported SML compiler or interpreter found

  The Vext external source code manager needs a Standard ML (SML)

  compiler or interpreter to run.

  Please ensure you have one of the following SML implementations

  installed and present in your PATH, and try again.

    1. Standard ML of New Jersey

       - executable name: sml

    2. Poly/ML

       - executable name: polyml

"@

       exit 1

    }

}

if ($args -match "'""") {

    $arglist = '["usage"]'

} else {

    $arglist = '["' + ($args -join '","') + '"]'

}

if ($sml -eq "poly") {

    $program = $program -replace "\\","\\\\"

    echo "use ""$program""; vext $arglist" | polyml -q --error-exit | Out-Host

    if (-not $?) {

        exit $LastExitCode

    }

} elseif ($sml -eq "smlnj") {

    $lines = @(Get-Content $program)

    $lines = $lines -notmatch "val _ = main ()"

    $intro = @"

val smlrun__cp =

    let val x = !Control.Print.out in

        Control.Print.out := { say = fn _ => (), flush = fn () => () };

        x

    end;

val smlrun__prev = ref "";

Control.Print.out := {

    say = fn s =>

        (if String.isSubstring "Error" s orelse String.isSubstring "Fail" s

         then (Control.Print.out := smlrun__cp;

               (#say smlrun__cp) (!smlrun__prev);

               (#say smlrun__cp) s)

         else (smlrun__prev := s; ())),

    flush = fn s => ()

};

"@ -split "[\r\n]+"

    $outro = @"

val _ = vext $arglist;

val _ = OS.Process.exit (OS.Process.success);

"@ -split "[\r\n]+"

    $script = @()

    $script += $intro

    $script += $lines

    $script += $outro

    $tmpfile = ([System.IO.Path]::GetTempFileName()) -replace "[.]tmp",".sml"

    $script | Out-File -Encoding "ASCII" $tmpfile

    $env:CM_VERBOSE="false"

    sml $tmpfile

    if (-not $?) {

        del $tmpfile

        exit $LastExitCode

    }

    del $tmpfile

} else {

    "Unknown SML implementation name: $sml"

    exit 2

}