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rollup.config.js
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rollup.config.js
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import commonjs from '@rollup/plugin-commonjs'
import json from '@rollup/plugin-json'
import nodeResolve from '@rollup/plugin-node-resolve'
import babel from 'rollup-plugin-babel'
import { terser } from 'rollup-plugin-terser'
import pkg from './package.json'
const extensions = ['.js', '.jsx', '.ts', '.tsx']
const bundleTarget = process.env.BUILD_BUNDLE
const externalDependencies = [
'core-js',
...Object.keys(pkg.dependencies || {}),
...Object.keys(pkg.peerDependencies || {}),
]
const isArrayLike = (x) => x != null && typeof x[Symbol.iterator] === 'function'
const isNil = (...xs) => xs.some((x) => x == null)
const isObjectLike = (x) => x != null && typeof x === 'object'
const isSameType = (x, y) => !isNil(x, y) && x.constructor === y.constructor
const sanitizeBundle = ({ type, ...rest }) => rest
const removeRelativePath = (dep) => dep.replace(/^(\.{1,2}\/)+/, '')
const presetBundleDefaults = (defaults) => (opts) =>
Object.entries({ ...defaults, ...opts }).reduce(
(acc, [k, v]) => ({
...acc,
[k]:
isObjectLike(v) && isSameType(v, defaults[k])
? isArrayLike(v)
? [...defaults[k], ...v]
: { ...defaults[k], ...v }
: v,
}),
{}
)
const external = (dependencies) => (id) =>
dependencies
.map((dep) => removeRelativePath(id).startsWith(dep))
.some(Boolean)
const bundle = presetBundleDefaults({
external: external(externalDependencies),
input: 'src/index.ts',
output: { exports: 'named', indent: false },
plugins: [nodeResolve({ extensions }), commonjs(), json()],
treeshake: true,
})
const bundles = [
bundle({
output: { format: 'cjs', file: `lib/${pkg.name}.js` },
plugins: [babel({ extensions })],
type: 'cjs',
}),
bundle({
output: { format: 'cjs', file: `lib/${pkg.name}.min.js` },
plugins: [babel({ extensions }), terser()],
type: 'cjs',
}),
bundle({
output: { format: 'es', file: `lib/${pkg.name}.es.js` },
plugins: [babel({ extensions })],
type: 'es',
}),
]
export default (() =>
[
...(bundleTarget != null
? bundles.filter((x) => x.type === bundleTarget)
: bundles),
].map(sanitizeBundle))()