src/index.js

import path from 'path';

import { getOptions, interpolateName } from 'loader-utils';
import { validate } from 'schema-utils';

import schema from './options.json';
import { normalizePath } from './utils';

export default function loader(content) {
  const options = getOptions(this);

  validate(schema, options, {
    name: 'File Loader',
    baseDataPath: 'options',
  });

  const context = options.context || this.rootContext;
  const name = options.name || '[contenthash].[ext]';

  const url = interpolateName(this, name, {
    context,
    content,
    regExp: options.regExp,
  });

  let outputPath = url;

  if (options.outputPath) {
    if (typeof options.outputPath === 'function') {
      outputPath = options.outputPath(url, this.resourcePath, context);
    } else {
      outputPath = path.posix.join(options.outputPath, url);
    }
  }

  let publicPath = `__webpack_public_path__ + ${JSON.stringify(outputPath)}`;

  if (options.publicPath) {
    if (typeof options.publicPath === 'function') {
      publicPath = options.publicPath(url, this.resourcePath, context);
    } else {
      publicPath = `${
        options.publicPath.endsWith('/')
          ? options.publicPath
          : `${options.publicPath}/`
      }${url}`;
    }

    publicPath = JSON.stringify(publicPath);
  }

  if (options.postTransformPublicPath) {
    publicPath = options.postTransformPublicPath(publicPath);
  }

  if (typeof options.emitFile === 'undefined' || options.emitFile) {
    const assetInfo = {};

    if (typeof name === 'string') {
      let normalizedName = name;

      const idx = normalizedName.indexOf('?');

      if (idx >= 0) {
        normalizedName = normalizedName.substr(0, idx);
      }

      const isImmutable = /\[([^:\]]+:)?(hash|contenthash)(:[^\]]+)?]/gi.test(
        normalizedName
      );

      if (isImmutable === true) {
        assetInfo.immutable = true;
      }
    }

    assetInfo.sourceFilename = normalizePath(
      path.relative(this.rootContext, this.resourcePath)
    );

    this.emitFile(outputPath, content, null, assetInfo);
  }

  const esModule =
    typeof options.esModule !== 'undefined' ? options.esModule : true;

  return `${esModule ? 'export default' : 'module.exports ='} ${publicPath};`;
}

export const raw = true;