commit-and-tag-version/lib/preset-loader.js

replacement for `npm version` with automatic CHANGELOG generation

// TODO: this should be replaced with an object we maintain and
// describe in: https://github.com/conventional-changelog/conventional-changelog-config-spec
const spec = require('conventional-changelog-config-spec');

module.exports = (args) => {
  const defaultPreset = require.resolve(
    'conventional-changelog-conventionalcommits',
  );
  let preset = args.preset || defaultPreset;
  if (preset === defaultPreset) {
    preset = {
      name: defaultPreset,
    };
    Object.keys(spec.properties).forEach((key) => {
      if (args[key] !== undefined) preset[key] = args[key];
    });
  }
  return preset;
};