gatsby-node.js

/**
 * Implement Gatsby's Node APIs in this file.
 *
 * See: https://www.gatsbyjs.org/docs/node-apis/
 */

// You can delete this file if you're not using it

const { languages, defaultLanguage } = require('./src/i18n-config');

exports.onCreateBabelConfig = props => {
  const { actions } = props;

  actions.setBabelPlugin({
    name: '@babel/plugin-proposal-class-properties',
  });

  actions.setBabelPlugin({
    name: '@babel/plugin-proposal-object-rest-spread',
  });

  actions.setBabelPlugin({
    name: '@babel/plugin-syntax-dynamic-import',
  });

  actions.setBabelPreset({
    name: '@lingui/babel-preset-react',
  });
};

exports.onCreatePage = async ({ page, actions }) => {
  const { createPage, deletePage } = actions;

  return new Promise((resolve, reject) => {
    deletePage(page);
    languages.map(language => {
      const newPage = Object.assign({}, page, {
        originalPath: page.path,
        path: '/' + language + page.path,
        context: {
          lang: language,
        },
      });

      createPage(newPage);
      if (language === defaultLanguage) {
        newPage.path = page.path;
        createPage(newPage);
      }
    });

    resolve();
  });
};