chore: remove unused intro code (#65855)

client/gatsby-config.js

@@ -65,36 +65,6 @@ module.exports = {
     {
       resolve: 'gatsby-transformer-remark'
     },
-    {
-      resolve: require.resolve(
-        '../tools/client-plugins/gatsby-remark-node-identity'
-      ),
-      options: {
-        identity: 'blockIntroMarkdown',
-        predicate: ({ frontmatter }) => {
-          if (!frontmatter) {
-            return false;
-          }
-          const { title, block, superBlock } = frontmatter;
-          return title && block && superBlock;
-        }
-      }
-    },
-    {
-      resolve: require.resolve(
-        '../tools/client-plugins/gatsby-remark-node-identity'
-      ),
-      options: {
-        identity: 'superBlockIntroMarkdown',
-        predicate: ({ frontmatter }) => {
-          if (!frontmatter) {
-            return false;
-          }
-          const { title, block, superBlock } = frontmatter;
-          return title && !block && superBlock;
-        }
-      }
-    },
     'gatsby-plugin-remove-serviceworker',
     {
       resolve: 'gatsby-plugin-schema-snapshot',

client/gatsby-node.js

@@ -1,21 +1,10 @@
 const { createFilePath } = require('gatsby-source-filesystem');
-// TODO: ideally we'd remove lodash and just use lodash-es, but we can't require
-// es modules here.
-const uniq = require('lodash/uniq');
 const MonacoWebpackPlugin = require('monaco-editor-webpack-plugin');
 const webpack = require('webpack');
 
 const { SuperBlocks } = require('@freecodecamp/shared/config/curriculum');
 const env = require('./config/env.json');
-const {
-  createBlockIntroPages,
-  createSuperBlockIntroPages
-} = require('./utils/gatsby');
-
-const createByIdentityMap = {
-  blockIntroMarkdown: createBlockIntroPages,
-  superBlockIntroMarkdown: createSuperBlockIntroPages
-};
+const { createSuperBlockIntroPages } = require('./utils/gatsby');
 
 exports.onCreateNode = function onCreateNode({ node, actions, getNode }) {
   const { createNodeField } = actions;
@@ -79,11 +68,9 @@ exports.createPages = async function createPages({
           node {
             fields {
               slug
-              nodeIdentity
             }
             frontmatter {
               certification
-              block
               superBlock
               title
             }
@@ -94,16 +81,6 @@ exports.createPages = async function createPages({
     }
   `);
 
-  const blocks = uniq(
-    result.data.allChallengeNode.edges.map(
-      ({
-        node: {
-          challenge: { block }
-        }
-      }) => block
-    )
-  );
-
   // Includes upcoming superBlocks
   const allSuperBlocks = Object.values(SuperBlocks);
 
@@ -115,33 +92,21 @@ exports.createPages = async function createPages({
     } = edge;
 
     if (!fields) {
-      return;
+      throw Error(
+        "'fields' property missing (this should be added in onCreateNode)"
+      );
     }
-    const { slug, nodeIdentity } = fields;
+    const { slug } = fields;
     if (slug.includes('LICENCE')) {
       return;
     }
-    if (nodeIdentity === 'blockIntroMarkdown') {
-      if (!blocks.includes(frontmatter.block)) {
-        return;
-      }
-    } else if (!allSuperBlocks.includes(frontmatter.superBlock)) {
-      return;
+
+    if (!allSuperBlocks.includes(frontmatter.superBlock)) {
+      throw Error(`Unknown superblock ${frontmatter.superBlock}`);
     }
 
-    try {
-      const pageBuilder = createByIdentityMap[nodeIdentity](createPage);
-      pageBuilder(edge);
-    } catch (e) {
-      console.log(e);
-      console.log(`
-            ident: ${nodeIdentity} does not belong to a function
-
-            ${frontmatter ? JSON.stringify(edge.node) : 'no frontmatter'}
-
-
-            `);
-    }
+    const pageBuilder = createSuperBlockIntroPages(createPage);
+    pageBuilder(edge);
   });
 };
 

client/src/templates/Introduction/intro.tsx

@@ -1,91 +0,0 @@
-import { graphql } from 'gatsby';
-import React from 'react';
-import Helmet from 'react-helmet';
-import { useTranslation } from 'react-i18next';
-
-import { Container, Spacer } from '@freecodecamp/ui';
-import { ButtonLink } from '../../components/helpers';
-import FullWidthRow from '../../components/helpers/full-width-row';
-import LearnLayout from '../../components/layouts/learn';
-import type { MarkdownRemark, AllChallengeNode } from '../../redux/prop-types';
-
-import './intro.css';
-
-function IntroductionPage({
-  data: { markdownRemark, allChallengeNode }
-}: {
-  data: {
-    markdownRemark: MarkdownRemark;
-    allChallengeNode: AllChallengeNode;
-  };
-}): React.FunctionComponentElement<typeof LearnLayout> {
-  const { t } = useTranslation();
-  const {
-    html,
-    frontmatter: { block, superBlock }
-  } = markdownRemark;
-  const firstLesson =
-    allChallengeNode && allChallengeNode.edges[0].node.challenge;
-  const firstLessonPath = firstLesson
-    ? firstLesson.fields.slug
-    : '/strange-place';
-  const blockTitle =
-    t(`intro:${superBlock}.blocks.${block}.title`) + ' | freeCodeCamp.org';
-  return (
-    <LearnLayout>
-      <Helmet>
-        <title>{blockTitle}</title>
-      </Helmet>
-      <Container className='intro-layout-container'>
-        <FullWidthRow>
-          <div
-            className='intro-layout'
-            dangerouslySetInnerHTML={{ __html: html }}
-          />
-        </FullWidthRow>
-        <FullWidthRow>
-          <ButtonLink block size='large' href={firstLessonPath || '/learn'}>
-            {t('buttons.first-lesson')}
-          </ButtonLink>
-          <Spacer size='xs' />
-          <ButtonLink block size='large' href='/learn'>
-            {t('buttons.view-curriculum')}
-          </ButtonLink>
-          <Spacer size='xs' />
-          <hr />
-        </FullWidthRow>
-      </Container>
-    </LearnLayout>
-  );
-}
-
-IntroductionPage.displayName = 'IntroductionPage';
-
-export default IntroductionPage;
-
-export const query = graphql`
-  query IntroPageBySlug($id: String!, $block: String!) {
-    markdownRemark(id: { eq: $id }) {
-      frontmatter {
-        block
-        superBlock
-      }
-      html
-    }
-    allChallengeNode(
-      sort: { challenge: { challengeOrder: ASC } }
-      filter: { challenge: { block: { eq: $block } } }
-      limit: 1
-    ) {
-      edges {
-        node {
-          challenge {
-            fields {
-              slug
-            }
-          }
-        }
-      }
-    }
-  }
-`;

client/utils/gatsby/challenge-page-creator.js

@@ -17,10 +17,6 @@ const codeAlly = path.resolve(
   __dirname,
   '../../src/templates/Challenges/codeally/show.tsx'
 );
-const intro = path.resolve(
-  __dirname,
-  '../../src/templates/Introduction/intro.tsx'
-);
 const superBlockIntro = path.resolve(
   __dirname,
   '../../src/templates/Introduction/super-block-intro.tsx'
@@ -169,25 +165,6 @@ function getProjectPreviewConfig(challenge, allChallengeNodes) {
   };
 }
 
-exports.createBlockIntroPages = function (createPage) {
-  return function (edge) {
-    const {
-      fields: { slug },
-      frontmatter: { block },
-      id
-    } = edge.node;
-
-    createPage({
-      path: slug,
-      component: intro,
-      context: {
-        block,
-        id
-      }
-    });
-  };
-};
-
 exports.createSuperBlockIntroPages = function (createPage) {
   return function (edge) {
     const {

tools/client-plugins/gatsby-remark-node-identity/.lintstagedrc.mjs

@@ -1,4 +0,0 @@
-/* eslint-disable filenames-simple/naming-convention */
-import { createLintStagedConfig } from '@freecodecamp/eslint-config/lintstaged';
-
-export default createLintStagedConfig(import.meta.dirname);

tools/client-plugins/gatsby-remark-node-identity/eslint.config.mjs

@@ -1,13 +0,0 @@
-import { configTypeChecked } from '@freecodecamp/eslint-config/base';
-import globals from 'globals';
-
-export default [
-  ...configTypeChecked,
-  {
-    languageOptions: {
-      globals: {
-        ...globals.node // TODO: migrate to ESM and remove globals
-      }
-    }
-  }
-];

tools/client-plugins/gatsby-remark-node-identity/gatsby-node.js

@@ -1,21 +0,0 @@
-exports.onCreateNode = function remarkNodeIdentityOnCreateNode(
-  { node, reporter, actions },
-  { predicate, identity }
-) {
-  if (typeof predicate !== 'function') {
-    reporter.panic(
-      'Please supply a predicate function to `gatsby-remark-node-identity`'
-    );
-  }
-  if (typeof identity !== 'string' || identity.length === 0) {
-    reporter.panic(
-      '`gatsby-remark-node-identity` requires an identify string to add to nodes ' +
-        'that match the predicate'
-    );
-  }
-  const { createNodeField } = actions;
-  if (predicate(node)) {
-    createNodeField({ node, name: 'nodeIdentity', value: identity });
-  }
-  return node;
-};

tools/client-plugins/gatsby-remark-node-identity/package.json

@@ -1,31 +0,0 @@
-{
-  "name": "@freecodecamp/gatsby-remark-node-identity",
-  "version": "0.0.1",
-  "description": "The freeCodeCamp.org open-source codebase and curriculum",
-  "license": "BSD-3-Clause",
-  "private": true,
-  "engines": {
-    "node": ">=24",
-    "pnpm": ">=10"
-  },
-  "scripts": {
-    "lint": "eslint --max-warnings 0"
-  },
-  "repository": {
-    "type": "git",
-    "url": "git+https://github.com/freeCodeCamp/freeCodeCamp.git"
-  },
-  "bugs": {
-    "url": "https://github.com/freeCodeCamp/freeCodeCamp/issues"
-  },
-  "homepage": "https://github.com/freeCodeCamp/freeCodeCamp#readme",
-  "author": "freeCodeCamp <team@freecodecamp.org>",
-  "main": "gatsby-node.js",
-  "peerDependencies": {
-    "gatsby": "^5.0.0"
-  },
-  "devDependencies": {
-    "@freecodecamp/eslint-config": "workspace:*",
-    "eslint": "^9.39.1"
-  }
-}