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rollup.config.js
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import fs from 'fs'
import path from 'path'
import nodeResolve from 'rollup-plugin-node-resolve'
import nodeGlobals from 'rollup-plugin-node-globals'
import commonjs from 'rollup-plugin-commonjs'
import babel from 'rollup-plugin-babel'
import replace from 'rollup-plugin-replace'
import {uglify} from 'rollup-plugin-uglify'
import {sizeSnapshot} from 'rollup-plugin-size-snapshot'
const {getPackageJson} = require('./scripts/get-package-json')
const pkg = getPackageJson()
const rootPath = path.resolve('./')
const matchSnapshot = process.env.SNAPSHOT === 'match'
function toCamelCase(name) {
return name.replace(/-(\w)/g, (match, letter) => letter.toUpperCase())
}
const input = path.join(rootPath, './src/index.js')
const name = toCamelCase(pkg.name)
const globals = Object.keys(pkg.peerDependencies || {}).reduce(
(acc, key) => Object.assign({}, acc, {[key]: toCamelCase(key)}),
{}
)
const external = id => !id.startsWith('.') && !id.startsWith('/')
const getBabelOptions = ({useESModules}) => ({
exclude: '**/node_modules/**',
babelrc: false,
runtimeHelpers: true,
presets: [['@babel/env', {loose: true}], '@babel/flow', '@babel/react'],
plugins: [
['@babel/proposal-class-properties', {loose: true}],
['@babel/transform-runtime', {useESModules}]
]
})
const commonjsOptions = {
ignoreGlobal: true
}
const snapshotOptions = {
matchSnapshot,
snapshotPath: './.size-snapshot.json'
}
const createFlowBundlePlugin = {
transformBundle(code, outputOptions) {
const file = path.join(rootPath, `${outputOptions.file}.flow`)
const content = "// @flow\n\nexport * from '../src';"
fs.writeFileSync(file, content)
}
}
export default [
{
input,
output: {
file: `dist/${pkg.name}.js`,
format: 'umd',
sourcemap: true,
exports: 'named',
name,
globals
},
external: Object.keys(globals),
plugins: [
nodeResolve(),
babel(getBabelOptions({useESModules: true})),
commonjs(commonjsOptions),
nodeGlobals({process: false}),
replace({
'process.env.NODE_ENV': JSON.stringify('development'),
'process.env.VERSION': JSON.stringify(pkg.version)
}),
sizeSnapshot(snapshotOptions)
]
},
{
input,
output: {
file: `dist/${pkg.name}.min.js`,
format: 'umd',
exports: 'named',
name,
globals
},
external: Object.keys(globals),
plugins: [
nodeResolve(),
babel(getBabelOptions({useESModules: true})),
commonjs(commonjsOptions),
nodeGlobals({process: false}),
replace({
'process.env.NODE_ENV': JSON.stringify('production'),
'process.env.VERSION': JSON.stringify(pkg.version)
}),
sizeSnapshot(snapshotOptions),
uglify()
]
},
{
input,
output: {file: pkg.main, format: 'cjs', exports: 'named'},
external,
plugins: [
createFlowBundlePlugin,
babel(getBabelOptions({useESModules: false})),
nodeGlobals({process: false}),
replace({'process.env.VERSION': JSON.stringify(pkg.version)}),
sizeSnapshot(snapshotOptions)
]
},
{
input,
output: {file: pkg.module, format: 'esm'},
external,
plugins: [
babel(getBabelOptions({useESModules: true})),
nodeGlobals({process: false}),
replace({'process.env.VERSION': JSON.stringify(pkg.version)}),
sizeSnapshot(snapshotOptions)
]
}
]