gatsby-node.js

const path = require('path');
const inflection = require('inflection');
const StyleLintPlugin = require('stylelint-webpack-plugin');
const WebpackNotifierPlugin = require('webpack-notifier');
const resolveAliases = require('./build/resolveAliases');
const glob = require('glob');

exports.onCreateNode = ({ node, actions }) => {
  const { createNodeField } = actions;
  const PAGES_BASE_DIR = path.resolve(__dirname, './src/site/pages');
  const COMPONENTS_BASE_DIR = path.resolve(__dirname, './src/patternfly/components');
  const DEMOS_BASE_DIR = path.resolve(__dirname, './src/patternfly/demos');
  const LAYOUTS_BASE_DIR = path.resolve(__dirname, './src/patternfly/layouts');
  const UTILITIES_BASE_DIR = path.resolve(__dirname, './src/patternfly/utilities');
  const isMarkdown = node.internal.type === 'MarkdownRemark';

  if (isMarkdown) {
    const isPage = node.fileAbsolutePath.includes(PAGES_BASE_DIR);
    const isComponent = node.fileAbsolutePath.includes(COMPONENTS_BASE_DIR);
    const isLayout = node.fileAbsolutePath.includes(LAYOUTS_BASE_DIR);
    const isDemo = node.fileAbsolutePath.includes(DEMOS_BASE_DIR);
    const isUtility = node.fileAbsolutePath.includes(UTILITIES_BASE_DIR);
    if (isPage) {
      const relativePath = path.relative(PAGES_BASE_DIR, node.fileAbsolutePath);
      const pagePath = `/${relativePath}`.replace(/\.md$/, '');
      createNodeField({ node, name: 'path', value: pagePath });
      createNodeField({ node, name: 'type', value: 'page' });
      createNodeField({ node, name: 'contentType', value: 'page' });
    } else if (isComponent) {
      const componentName = path.basename(path.dirname(node.fileAbsolutePath));
      const pagePath = `/components/${componentName}/docs`;
      createNodeField({ node, name: 'path', value: pagePath });
      createNodeField({ node, name: 'type', value: 'documentation' });
      createNodeField({ node, name: 'contentType', value: 'component' });
    } else if (isLayout) {
      const layoutName = path.basename(path.dirname(node.fileAbsolutePath));
      const pagePath = `/layouts/${layoutName}/docs`;
      createNodeField({ node, name: 'path', value: pagePath });
      createNodeField({ node, name: 'type', value: 'documentation' });
      createNodeField({ node, name: 'contentType', value: 'layout' });
    } else if (isDemo) {
      const demoName = path.basename(path.dirname(node.fileAbsolutePath));
      const pagePath = `/demos/${demoName}/docs`;
      createNodeField({ node, name: 'path', value: pagePath });
      createNodeField({ node, name: 'type', value: 'documentation' });
      createNodeField({ node, name: 'contentType', value: 'demo' });
    } else if (isUtility) {
      const utilityName = path.basename(path.dirname(node.fileAbsolutePath));
      const pagePath = `/utilities/${utilityName}/docs`;
      createNodeField({ node, name: 'path', value: pagePath });
      createNodeField({ node, name: 'type', value: 'documentation' });
      createNodeField({ node, name: 'contentType', value: 'utility' });
    }
  }
};

exports.createPages = ({ actions, graphql }) => {
  const { createPage } = actions;

  return graphql(`
    {
      allMarkdownRemark {
        edges {
          node {
            fields {
              type
              path
              contentType
            }
          }
        }
      }
    }
  `).then(result => {
    if (result.errors) {
      return Promise.reject(result.errors);
    }

    return result.data.allMarkdownRemark.edges.forEach(({ node }) => {
      createPage({
        path: node.fields.path,
        component: path.resolve(__dirname, `./src/site/templates/${node.fields.type}.js`),
        layout: 'index',
        context: {
          pagePath: node.fields.path,
          type: node.fields.type,
          contentType: node.fields.contentType
        }
      });
    });
  });
};

exports.onCreatePage = async ({ page, actions }) => {
  const { createPage } = actions;
  const CATEGORY_PAGE_REGEX = /^\/(components|layouts|demos|utilities)\/$/;
  const CATEGORY_CHILD_PAGE_REGEX = /^\/(components|layouts|demos|utilities)\/([A-Za-z0-9_-]+)/;
  return new Promise((resolve, reject) => {
    const isCategoryPage = page.path.match(CATEGORY_PAGE_REGEX);
    const isCategoryChildPage = page.path.match(CATEGORY_CHILD_PAGE_REGEX);

    page.context.type = 'page';
    page.context.category = 'page';
    page.context.slug = '';
    page.context.name = '';
    page.context.title = '';
    page.layout = 'index';

    if (isCategoryPage) {
      page.context.type = 'category';
      page.context.category = page.path.match(CATEGORY_PAGE_REGEX)[1];
    } else if (isCategoryChildPage) {
      const pageCategory = page.path.match(CATEGORY_CHILD_PAGE_REGEX)[1];
      const pageSlug = page.path.match(CATEGORY_CHILD_PAGE_REGEX)[2];
      const pageName = pageSlug.replace('-', ' ');
      const pageTitle = inflection.titleize(pageName);
      page.context.type = inflection.singularize(pageCategory);
      page.context.category = pageCategory;
      page.context.slug = pageSlug;
      page.context.name = pageName;
      page.context.title = pageTitle;
    }
    createPage(page);

    if (isCategoryChildPage) {
      // create full demo page for each component
      const demoPage = Object.assign({}, page);
      demoPage.layout = 'demo';
      const nodePath = demoPage.path;
      demoPage.path = `${nodePath.substr(0, nodePath.length - 1)}-full/`;
      createPage(demoPage);
    }
    resolve();
  });
};

let partialsToLocationsMap = null;

const continueWebpackConfig = ({ stage, actions }) => {
  actions.setWebpackConfig({
    module: {
      rules: [
        {
          test: /\.md$/,
          loader: 'html-loader!markdown-loader'
        },
        {
          test: /\.hbs$/,
          query: {
            extensions: '.hbs',
            partialResolver(partial, callback) {
              if (partialsToLocationsMap[partial]) {
                callback(null, partialsToLocationsMap[partial]);
              } else {
                console.log(`Could not find partial: ${partial}`);
                callback(new Error(`Could not find partial: ${partial}`), '');
              }
            },
            helperDirs: path.resolve(__dirname, './build/helpers')
          },
          loader: 'handlebars-loader'
        }
      ]
    },
    resolve: {
      alias: resolveAliases
    },
    resolveLoader: {
      alias: { raw: 'raw-loader' }
    },
    plugins: [
      new StyleLintPlugin({
        configFile: './.stylelintrc',
        fix: false,
        failOnError: false,
        emitErrors: true,
        files: 'src/**/*.scss',
        defaultSeverity: 'error'
      }),
      new WebpackNotifierPlugin({
        title: 'PatternFly 4',
        skipFirstNotification: true
      })
    ]
  });
};

exports.onCreateWebpackConfig = ({ stage, actions }) =>
  new Promise((resolve, reject) => {
    if (partialsToLocationsMap === null) {
      partialsToLocationsMap = {};
      glob(path.resolve(__dirname, './src/patternfly/**/*.hbs'), { ignore: '**/examples/**' }, (err, files) => {
        files.forEach(file => {
          const fileNameArr = file.split('/');
          const fileName = fileNameArr[fileNameArr.length - 1].slice(0, -4);
          partialsToLocationsMap[fileName] = file;
        });
        continueWebpackConfig({ stage, actions });
        resolve();
      });
    } else {
      continueWebpackConfig({ stage, actions });
      resolve();
    }
  });