Systèmes de build : Just

just-task.js

const { task, series, logger } = require('just-task')
const { CLIEngine } = require('eslint')
const rollup = require('rollup')
const typescript = require('rollup-plugin-typescript2')
const prepack = require('rollup-plugin-prepack-up')
const uglify = require('uglify-js')
const fs = require('fs')

const lint = options => {
    const eslint = new CLIEngine()
    const formatter = eslint.getFormatter()
    const { results } = eslint.executeOnFiles([options.glob])
    if (results.reduce((value, item) => value + item.errorCount, 0)) {
        logger.info(formatter(results))
        throw new Error('Linter has found errors')
    } else if (results.reduce((value, item) => value + item.warningCount, 0)) {
        logger.info(formatter(results))
    }
}

const bundle = async options => {
    await rollup.rollup({
        input: options.input,
        plugins: [
            typescript({ useTsconfigDeclarationDir: true }),
            prepack(),
        ],
    }).then(bundler => {
        bundler.write({
            file: options.output,
            format: 'umd',
            name: options.name,
        })
    })
}

const minify = async options => {
    const params = {}
    if ('sourcemap' in options && 'filename' in options) {
        params.sourceMap = {
            filename: options.filename,
            url: 'inline',
        }
    }
    await new Promise((resolve, reject) => {
        fs.readFile(options.from, 'utf8', (readError, data) => {
            if (readError) reject(readError)
            fs.writeFile(options.to, uglify.minify(data, params).code, writeError => {
                if (writeError) reject(writeError)
                resolve()
            })
        })
    })
}

task('lint', () => lint({
    glob: 'src/**',
}))

task('bundle', () => bundle({
    input: 'src/Toast.ts',
    output: 'dist/toast.js',
    name: 'toast',
}))

task('minify', () => minify({
    from: 'dist/toast.js',
    to: 'dist/toast.min.js',
}))

task('minify-dev', () => minify({
    from: 'dist/toast.js',
    to: 'tests/lib/toast.min.js',
    sourcemap: true,
    filename: 'toast.js',
}))

task('build', series(
    'lint',
    'bundle',
    'minify',
    'minify-dev',
))