Vite plugin for dependency monkey patching

monkey-patch-vega-scenegraph.js

import { createLogger } from 'vite';

export function monkeyPatchVegaScenegraph() {
  const name = 'monkey-patch-vega-scenegraph';

  const logger = createLogger('info', { prefix: `[${name}]` });
  const logOptions = {timestamp: true};

  const replaceCriteria = /touchmove\(evt\) \{\s*this\.fire/m;

  return {
    name: name,

    transform(code, id) {
      if (id.includes('react-vega.js')) {
        if (replaceCriteria.test(code)) {
          logger.info(`Temporarily monkey patching vega-scenegraph. Refer to: https://github.com/vega/vega/pull/3547`, logOptions);

          const transformedCode = code.replace(
              replaceCriteria,
              `touchmove(evt) {
    this._touch = this.pickEvent(evt.changedTouches[0]);
    this.fire`);

          return {
            code: transformedCode,
            map: null,
          };
        } else {
          logger.warn(`vega-scenegraph is not monkey patched as intended. Check out if https://github.com/vega/vega/pull/3547 is resolved.`, logOptions);
        }
      }
    }
  }
}