Compile Godot for HTML5 easily (from Windows)

build_javascript.bat

:: This script must be run from a Windows system with the Emscripten SDK
:: installed and configured. 7-Zip and MinGW also need to be installed.

:: Place this script at the root of your Godot Git clone.
:: CC0 1.0 Universal

set threads=%NUMBER_OF_PROCESSORS%

:: Set MinGW path
set PATH=%PROGRAMFILES%\mingw-w64\x86_64-6.2.0-posix-seh-rt_v5-rev0\mingw64\bin\;%PATH%

:: Set Emscripten environment variables
set previous_cd=%cd%
cd "C:\Apps\Emscripten"
call "emsdk_env.bat"
cd %previous_cd%

:: This is required so that SCons sees HTML5 as a valid build option
set EMSCRIPTEN_ROOT="C:\Apps\Emscripten\emscripten\1.35.0"


:: Build Godot for HTML5 in debug and release mode
call "C:\Python27\Scripts\scons.bat" p=javascript -j%threads% verbose=no tools=no target=release
call "C:\Python27\Scripts\scons.bat" p=javascript -j%threads% verbose=no tools=no target=release_debug

cd bin

:: Copy files around to prepare the export templates
:: TODO: Check if folder exists before attempting to create it
mkdir javascript_debug
mkdir javascript_release
copy godot.javascript.opt.debug.exe.js javascript_debug\godot.js
copy godot.javascript.opt.debug.exe.html.mem javascript_debug\godot.mem
copy ..\tools\dist\html_fs\* javascript_debug

copy godot.javascript.opt.exe.js javascript_release\godot.js
copy godot.javascript.opt.exe.html.mem javascript_release\godot.mem
copy ..\tools\dist\html_fs\* javascript_release

:: Compress into .zip to make the export template
cd javascript_debug
call "%PROGRAMFILES%\7-Zip\7z.exe" a ..\javascript_debug.zip *
cd ..\javascript_release
call "%PROGRAMFILES%\7-Zip\7z.exe" a ..\javascript_release.zip *

:: Copy to Godot's templates folder
cd ..
copy javascript_debug.zip %APPDATA%\Godot\templates
copy javascript_release.zip %APPDATA%\Godot\templates