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rollup.config.js
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rollup.config.js
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import sourcemaps from "rollup-plugin-sourcemaps";
import commonjs from "@rollup/plugin-commonjs";
import ts from "@wessberg/rollup-plugin-ts";
import paths from "rollup-plugin-ts-paths";
import nodeResolve from "@rollup/plugin-node-resolve";
import { terser } from "rollup-plugin-terser";
import { keys, mapValues, upperFirst, camelCase, template } from "lodash";
import pkg from "./package.json";
const { main, dependencies, peerDependencies, module, unpkg } = pkg;
const formatModule = (name) =>
upperFirst(camelCase(name.indexOf("@") !== -1 ? name.split("/")[1] : name));
const yearRange = (date) =>
new Date().getFullYear() === +date ? date : `${date} - ${new Date().getFullYear()}`;
const year = yearRange(pkg.since || new Date().getFullYear());
const external = keys({ ...peerDependencies, ...dependencies } || {});
const globals = mapValues({ ...peerDependencies, ...dependencies } || {}, (value, key) =>
formatModule(key)
);
const name = formatModule(pkg.name);
/* eslint-disable */
const banner = template(`
/**
* <%= p.nameFormatted %> (<%= p.name %> v<%= p.version %>)
* <%= p.description %>
* <%= p.homepage %>
* (c) <%= p.year %> <%= p.author %>
* @license <%= p.license || "MIT" %>
*/
/* eslint-disable */`, { variable: "p" })({ ...pkg, nameFormatted: name, year }).trim();
/* eslint-enable */
const outputs = [
{ format: "cjs", file: main },
{ format: "umd", file: unpkg },
{ format: "esm", file: module },
].filter((it) => it);
export default {
input: "src/index.ts",
output: outputs.map(({ format, file }) => ({
exports: "named",
sourcemap: true,
file,
format,
globals,
name,
banner,
})),
external,
watch: {
include: ["src/**/*", "example/**/*"],
},
plugins: [
sourcemaps(),
paths(),
commonjs(),
nodeResolve(),
ts({ tsconfig: "tsconfig.build.json" }),
terser({
output: { comments: (node, comment) => /@preserve|@license|@cc_on/i.test(comment.value) },
}),
],
};