Garry's Mod Addon Creator and Extractor
gmad <command> <options>
To create a new .gma file
gmad.exe create -folder "C:\path\to\addon\folder\" -out "C:\where\to\save\file\out.gma"
To extract an existing .gma file into its parent folder
gmad.exe extract -file "C:\steam\etc\garrysmod\addons\my_addon_12345.gma"
To extract an existing .gma file into another folder
gmad.exe extract -file "C:\steam\etc\garrysmod\addons\my_addon_12345.gma" -out "C:\this\folder"
Compiling requires Bootil and Premake to generate the project files.
You can either add the lib and include folder to your path, or copy all the files in, or set them on the premake command line.
premake4 --outdir="bin/" --bootil_lib="c:/bootil/lib/" --bootil_inc="c:/bootil/include/" vs2010
Or on linux
premake4 --outdir="bin/" --bootil_lib="/whatevs/bootil/lib/" --bootil_inc="/whatevs/bootil/include/" gmake
You will need premake5 for newer Visual Studio versions.
premake5 --outdir="bin/" --bootil_lib="../bootil/lib/windows/vs2017/" --bootil_inc="../bootil/include/" vs2017