rollup.config.js

import { dirname, relative, resolve } from 'path'
import typescript from '@rollup/plugin-typescript'
import dts from 'rollup-plugin-dts'
import { cwd } from 'process'

const dir = 'dist'

const useSrc = ({ out, ext } = {}) => ({
  name: 'local:useSrc',
  resolveId(source, importer) {
    if (ext.some((e) => source.endsWith(e))) {
      const here = cwd()
      const from =
        typeof out === 'string'
          ? out
          : dirname(typeof out === 'function' ? out(importer) : importer)
      const originalImporter = importer.replace(`${here}/dist`, here)
      const originalImporterDir = dirname(originalImporter)
      const original = resolve(originalImporterDir, source)
      const relativePath = relative(from, original)
      return {
        id: relativePath,
        external: true,
      }
    }
  },
})

export default [
  {
    input: 'src/index.ts',
    output: [
      {
        dir,
        format: 'es',
      },
    ],
    plugins: [
      typescript(),
      useSrc({
        ext: ['.astro', '.svelte', '.vue', '.scss', '.css', '.png', '.jpg'],
        dir,
        out: (path) => path.replace('src', 'dist'),
      }),
    ],
  },
  {
    input: 'src/components/index.ts',
    output: [
      {
        file: 'dist/components.js',
        format: 'es',
      },
    ],
    plugins: [
      typescript(),
      useSrc({
        ext: ['.astro', '.vue'],
        dir,
        out: (path) => path.replace('src/components', 'dist'),
      }),
    ],
  },
  {
    input: 'src/utils/index.ts',
    output: [
      {
        file: 'dist/utils.js',
        format: 'es',
      },
    ],
    plugins: [typescript()],
  },
  {
    input: 'dist/src/index.d.ts',
    output: [{ file: 'dist/index.d.ts', format: 'es' }],
    plugins: [
      dts(),
      useSrc({
        ext: ['.astro', '.svelte', '.vue', '.scss', '.css', '.png', '.jpg'],
        dir,
        out: (path) => path.replace('dist/src', 'dist'),
      }),
    ],
  },
  {
    input: 'dist/src/components/index.d.ts',
    output: [{ file: 'components.d.ts', format: 'es' }],
    plugins: [
      dts(),
      useSrc({
        ext: ['.astro', '.vue'],
        dir,
        out: (path) => path.replace('dist/src/components', ''),
      }),
    ],
  },
  {
    input: 'dist/src/utils/index.d.ts',
    output: [{ file: 'utils.d.ts', format: 'es' }],
    plugins: [dts()],
  },
]