const path = require('path');

const webpack = require('webpack');

const shell = require('shelljs');

const chalk = require('chalk');

const ClosureWebpackPlugin = require('closure-webpack-plugin');

const CleanWebpackPlugin = require('clean-webpack-plugin');

const CopyWebpackPlugin = require('copy-webpack-plugin');

const GitRevisionPlugin = require('git-revision-webpack-plugin');

const CompressionWebpackPlugin = require('compression-webpack-plugin');

const git = new GitRevisionPlugin({branch: true});

const styleexcludes = /(node_modules)|(support)|(gen)|(tokenize.js)|(symtable.js)|(compile.js)|(ast.js)|(internalpython.js)/;

if (!shell.which('git')) {

console.log(chalk.red("WARNING: Cannot find git! Unsure if working directory is clean."));

}

var output = shell.exec('git diff-index --quiet HEAD');

if (output.code !== 0) {

console.log(chalk.red("WARNING: Working directory is not clean."));

} else {

console.log("Working directory is clean.");

}

module.exports = (env, argv) => {

var opt = {

minimize: false

};

var outfile = 'skulpt.js';

var assertfile = './assert-dev.js';

var mod = {};

var languageOut = (env && env.languageOut) || '';

if (argv.mode === 'production') {

opt = {

noEmitOnErrors: true,

minimizer: [

new ClosureWebpackPlugin({mode: 'STANDARD'}, {

jscomp_error: ['accessControls', 'checkRegExp', 'checkVars', /*'checkTypes',*/

'invalidCasts', 'missingProperties',

'nonStandardJsDocs', 'strictModuleDepCheck', 'undefinedVars',

'unknownDefines', 'visibility'],

jscomp_off: ['deprecated', 'uselessCode', 'suspiciousCode', 'checkTypes',],

languageOut: languageOut || 'ECMASCRIPT_2015',

externs: 'support/externs/sk.js',

rewritePolyfills: true,

// compiler flags here

//

// for debugging help, try these:

//

// warningLevel: "QUIET",

// formatting: 'PRETTY_PRINT',

// debug: true,

// renaming: false

})

]

};

outfile = 'skulpt.min.js';

assertfile = './assert-prod.js';

mod = {

rules: [

{

test: /\.js$/,

enforce: 'pre',

exclude: styleexcludes,

loader: 'eslint-loader'

}

]

};

}

var config = {

entry: './src/main.js',

output: {

path: path.resolve(__dirname, 'dist'),

filename: outfile

},

devtool: 'source-map',

plugins: [

new CleanWebpackPlugin(),

new CopyWebpackPlugin([

{ from: 'debugger/debugger.js', to: 'debugger.js' }

]),

new webpack.DefinePlugin({

GITVERSION: JSON.stringify(git.version()),

GITHASH: JSON.stringify(git.commithash()),

GITBRANCH: JSON.stringify(git.branch()),

BUILDDATE: JSON.stringify(new Date())

}),

new CompressionWebpackPlugin({

include: /^skulpt\.min\.js$/,

algorithm: 'gzip'

})

],

optimization: opt,

resolve: {

alias: {

'assert': assertfile,

}

},

module: mod,

// uncomment this while working on closure compiler errors

// externals: {

// jsbi: "JSBI",

// }

};

return config;

};