Rollup plugin to build dependency files suitable for make

• mangle: [Default: output.file with existing extension replaced by .d] A function that will be passed output.file and should return the file to write dependencies to.

Suppose a make rule builds dist/script/* from script/*. With an input of script/app.js, the plugin will write dependencies to dist/script/app.d by default. In the example below, dependencies will instead be written to dist/.dep/script/app.d:

import make from 'rollup-plugin-make';
import path from 'path';
export default {
  ...
  plugins: [
    ...
    make({
      mangle: (file) => {
        const outputStem = 'dist/';
        const input = file.replace(outputStem, '');
        const inputDep = `${input.substring(0, input.lastIndexOf('.'))}.d`;
        return path.join(outputStem, '.dep', inputDep);
      },
    }),
  ],
};