rollup-plugin-require-context2/src/helper/generate-require-context-code.js

rollup-plugin for webpack requrie-context

const Path = require('path');
const extractArgs = require('./extract-args');
const resolveRequireModules = require('./resolve-reqquire-modules');
const resolveRequireCode = require('./resolve-require-code');

module.exports = async function gernerateRequireContextCode(id, code) {
  const currentCodeDirname = Path.dirname(id);
  const data = await extractArgs(code, currentCodeDirname);
  let head = '';

  const body = data.reduceRight((res, r) => {
    const {
      start, end,
      dirname, recursive, regexp
    } = r;
    const modules = resolveRequireModules(dirname, recursive, regexp);
    const { importCode, requireFnCode } = resolveRequireCode(dirname, modules);

    head += importCode;

    res = [
      res.slice(0, start),
      requireFnCode,
      res.slice(end)
    ].join('');
    return res;
  }, code);

  return [
    head,
    body
  ].join('\n');
};