rollup.config.js

import * as Manifest from '@illandril/foundryvtt-utils/manifest';
import { babel } from '@rollup/plugin-babel';
import { nodeResolve } from '@rollup/plugin-node-resolve';
import fs from 'fs-extra';
import copy from 'rollup-plugin-copy';
import globals, { description, repositoryURL } from './globals.js';

const target = 'dist';
const isDevelopment = process.env.BUILD === 'development';

export default {
  input: 'src/index.ts',
  output: {
    file: `${target}/module.js`,
    format: 'es',
    banner: Object.entries(globals)
      .map(([key, value]) => `const ${key} = ${JSON.stringify(value)};\n`)
      .join(''),
    sourcemap: isDevelopment,
    sourcemapPathTransform: (sourcePath) => sourcePath.replace(/^..[/\\]?/, ''),
  },
  watch: {
    chokidar: {
      usePolling: true,
    },
  },
  plugins: [
    nodeResolve({ extensions: ['.js', '.ts'] }),
    babel({
      babelHelpers: 'bundled',
      extensions: ['.js', '.ts'],
    }),
    copy({
      targets: [
        { src: 'src/styles.css', dest: target },
        { src: 'src/lang', dest: target },
        { src: 'LICENSE', dest: target },
      ],
    }),
    {
      name: 'moduleJSON',
      buildStart: async () => {
        const manifestData = await fs.readJSON('src/manifestData.json');

        return fs.outputJSON(
          `${target}/module.json`,
          Manifest.generate({
            ...manifestData,
            authors: [Manifest.IllandrilAuthorInfo],
            ...globals.moduleMetadata,
            description,
            repositoryURL,
          }),
          { spaces: 2 },
        );
      },
    },
    {
      name: 'lock',
      buildStart: async () => {
        if (isDevelopment) {
          await fs.outputFile(`${target}/${globals.moduleMetadata.id}.lock`, '');
        }
      },
    },
  ],
};