Simple Lua build script for Windows using MSVC

lua-build.ps1

<#
Instructions:

Clone/download Lua source code from https://www.lua.org

Run this script from the root of the source code directory

You may need to install Visual Studio build tools with MSVC compiler
#>

Write-Host "Lua build script for Windows"
Write-Host "Copyright (c) 2023 nopeless"
Write-Host "Licensed under WTFPL"
Write-Host "Lua codebase by Lua.org, PUC-Rio"
Write-Host
Write-Host ("=" * 80)

$ErrorActionPreference = "Stop"

# ==== enough rambling ====

$cl = (Get-Command "cl.exe" -ErrorAction SilentlyContinue)

if (-not $cl) { $cl = $Env:MSVC_CL } else { $cl = $cl.source }

$outfile = Join-Path $pwd "lua.exe"

if (-not $cl) {
    Write-Host -ForegroundColor Red "ERR: cl.exe not found, please install Visual Studio build tools with MSVC compiler"

    Write-Host "If you have it installed, either
    - set `$Env:MSVC_CL to the path of cl.exe (current value: $Env:MSVC_CL)
    - add cl.exe directory to PATH
    - or run this script from the Developer Command Prompt for VS"
    exit 1
}

Write-Host "Using cl.exe at $cl"
Write-Host "Output file: $outfile"

# ==== build ====

Write-Host "Clearing temp directory"

Remove-Item -Recurse -Force -ErrorAction SilentlyContinue "temp"
New-Item -ItemType Directory -Path "temp" > $null

Write-Host "Copying source files"

Copy-Item -Path "*.[ch]" -Destination "temp"

# This file is just a merged file

Write-Host "Deleting temp\onelua.c"

Remove-Item -Path "temp\onelua.c"

Write-Host "Compiling using /O2 /favor:AMD64"
Write-Host "Logs are in temp/cl-compile.log"

try {
    Set-Location temp

    & $cl *.c /Fe:$outfile /O2 /favor:AMD64 > cl-compile.log
}
catch {
    Write-Host -ForegroundColor Red "ERR: cl.exe failed to compile"
    Write-Host "Check temp/cl-compile.log for more info"
    exit 1
}
finally {
    Set-Location ..
}

Write-Host "Testing lua.exe"
& $outfile -v | Write-Host
& $outfile -e "print('Hello,' .. ' world!')" | Write-Host

Write-Host "Done!"