gatsby-config.js

require("dotenv").config({
  path: `.env.${process.env.NODE_ENV}`,
})

module.exports = {
  siteMetadata: {
    title: 'Ardalis is Steve Smith - ardalis',
    author:'Steve Smith',
    siteUrl: 'https://ardalis.com',
    description:
      'Steve is an experienced software architect and trainer, focusing currently on ASP.NET Core and Domain-Driven Design.',
    social: {
      twitter: `ardalis`,
    },
    image: '/img/ardalis-icon-128x128.png'
  },
  plugins: [
    {
      // keep as first gatsby-source-filesystem plugin for gatsby image support
      resolve: 'gatsby-source-filesystem',
      options: {
        path: `${__dirname}/static/img`,
        name: 'uploads',
      },
    },
    {
      resolve: 'gatsby-source-filesystem',
      options: {
        path: `${__dirname}/src/img`,
        name: 'images',
      },
    },         
    {
      resolve: 'gatsby-source-filesystem',
      options: {
        path: `${__dirname}/src/pages`,
        name: 'pages',
      },
    },
    'gatsby-transformer-sharp', 
    {
      resolve: 'gatsby-plugin-local-search',
      options: {
        // A unique name for the search index. This should be descriptive of
        // what the index contains. This is required.
        name: 'pages',

        // Set the search engine to create the index. This is required.
        // The following engines are supported: flexsearch, lunr
        engine: 'flexsearch',

        // Provide options to the engine. This is optional and only recommended
        // for advanced users.
        //
        // Note: Only the flexsearch engine supports options.
        engineOptions: 'speed',

        // GraphQL query used to fetch all data for the search index. This is
        // required.
        query: `
        {
          site {
            siteMetadata {
              siteUrl
            }
          }
          allMarkdownRemark(
            filter: {fileAbsolutePath: {regex: "content/blog/"}, frontmatter: {date: {gte: "2018-01-01"}}}
          ) {
            nodes {
              id
              rawMarkdownBody
              fields {
                slug
              }
              frontmatter {
                title
                description
              }
            }
          }
        }
        `,

        // Field used as the reference value for each document.
        // Default: 'id'.
        ref: 'id',

        // List of keys to index. The values of the keys are taken from the
        // normalizer function below.
        // Default: all fields
        index: ['title', 'description','body'],

        // List of keys to store and make available in your UI. The values of
        // the keys are taken from the normalizer function below.
        // Default: all fields
        store: ['id', 'title','description','slug'],

        // Function used to map the result from the GraphQL query. This should
        // return an array of items to index in the form of flat objects
        // containing properties to index. The objects must contain the `ref`
        // field above (default: 'id'). This is required.
        normalizer: ({ data }) =>
          data.allMarkdownRemark.nodes.map((node) => ({
            id: node.id,
            title: node.frontmatter.title,
            description: node.frontmatter.description,
            slug: node.fields.slug,
            body: node.rawMarkdownBody
          })),
      },
    },  
    'gatsby-plugin-sharp',
    {
      resolve: 'gatsby-transformer-remark',
      options: {
        plugins: [
            {
              resolve: `gatsby-remark-relative-images`,
              options: {
                name: 'uploads'
              }
            },
            {
              resolve: `gatsby-remark-images`,
              options: {},
            },
          {
            resolve: `gatsby-remark-prismjs`,
            options: {
              // Class prefix for <pre> tags containing syntax highlighting;
              // defaults to 'language-' (e.g. <pre class="language-js">).
              // If your site loads Prism into the browser at runtime,
              // (e.g. for use with libraries like react-live),
              // you may use this to prevent Prism from re-processing syntax.
              // This is an uncommon use-case though;
              // If you're unsure, it's best to use the default value.
              classPrefix: "language-",
              // This is used to allow setting a language for inline code
              // (i.e. single backticks) by creating a separator.
              // This separator is a string and will do no white-space
              // stripping.
              // A suggested value for English speakers is the non-ascii
              // character '›'.
              inlineCodeMarker: null,
              // This lets you set up language aliases.  For example,
              // setting this to '{ sh: "bash" }' will let you use
              // the language "sh" which will highlight using the
              // bash highlighter.
              aliases: {},
              // This toggles the display of line numbers globally alongside the code.
              // To use it, add the following line in gatsby-browser.js
              // right after importing the prism color scheme:
              //  require("prismjs/plugins/line-numbers/prism-line-numbers.css")
              // Defaults to false.
              // If you wish to only show line numbers on certain code blocks,
              // leave false and use the {numberLines: true} syntax below
              showLineNumbers: false,
              // If setting this to true, the parser won't handle and highlight inline
              // code used in markdown i.e. single backtick code like `this`.
              noInlineHighlight: false,
              // This adds a new language definition to Prism or extend an already
              // existing language definition. More details on this option can be
              // found under the header "Add new language definition or extend an
              // existing language" below.
              languageExtensions: [
                {
                  language: "aspnet",
                  definition: {
                    superscript_types: /(SuperType)/,
                  },
                  insertBefore: {
                    function: {
                      superscript_keywords: /(superif|superelse)/,
                    },
                  },
                },
              ],
              // Customize the prompt used in shell output
              // Values below are default
              prompt: {
                user: "root",
                host: "localhost",
                global: false,
              },
              // By default the HTML entities <>&'" are escaped.
              // Add additional HTML escapes by providing a mapping
              // of HTML entities and their escape value IE: { '}': '&#123;' }
              escapeEntities: {},
            },
          },
          {
            resolve: `gatsby-plugin-feed`,
            options: {
              query: `
                {
                  site {
                    siteMetadata {
                      title
                      description
                      siteUrl
                      site_url: siteUrl
                    }
                  }
                }
              `,
              feeds: [
                {
                  serialize: ({ query: { site, allMarkdownRemark } }) => {
                    return allMarkdownRemark.edges.map(edge => {
                      return Object.assign({}, edge.node.frontmatter, {
                        description: edge.node.excerpt,
                        date: edge.node.frontmatter.date,
                        url: site.siteMetadata.siteUrl + edge.node.fields.slug,
                        guid: site.siteMetadata.siteUrl + edge.node.fields.slug,
                        custom_elements: [{ "content:encoded": edge.node.html }],
                      })
                    })
                  },
                  query: `
                    {
                      allMarkdownRemark(
                        sort: { order: DESC, fields: [frontmatter___date] },
                        filter: {fileAbsolutePath: {regex: "content/blog/"}},
                        limit: 10
                      ) {
                        edges {
                          node {
                            excerpt
                            html
                            fields { slug }
                            frontmatter {
                              title
                              date
                            }
                          }
                        }
                      }
                    }
                  `,
                  output: "/rss.xml",
                  title: "Ardalis RSS Feed",
                  // optional configuration to insert feed reference in pages:
                  // if `string` is used, it will be used to create RegExp and then test if pathname of
                  // current page satisfied this regular expression;
                  // if not provided or `undefined`, all pages will have feed reference inserted
                  match: "^/blog/",
                },
              ],
            },
          },
          {
            resolve: 'gatsby-remark-images',
            options: {
              // It's important to specify the maxWidth (in pixels) of
              // the content container as this plugin uses this as the
              // base for generating different widths of each image.
              maxWidth: 2048,
            },
          },
          {
            resolve: 'gatsby-remark-copy-linked-files',
            options: {
              destinationDir: 'static',
            },
          },
        ],
      },
    },
    {
      resolve: "gatsby-plugin-google-tagmanager",
      options: {
        id: "GTM-NVBMVX8",
        includeInDevelopment: false,
      }
    },
    {
      resolve: 'gatsby-plugin-robots-txt',
      options: {
        host: 'https://www.ardalis.com',
        sitemap: 'https://www.ardalis.com/sitemap.xml',
        policy: [{ userAgent: '*', allow: '/' }]
      }
    },
    'gatsby-plugin-react-helmet',
    `gatsby-plugin-twitter`,
    'gatsby-plugin-sitemap',
    {
      resolve: 'gatsby-plugin-sass',
      options: {
        sassOptions: {
          indentedSyntax: true
        }
      }
    },        
    {
      resolve: 'gatsby-plugin-mailchimp',
      options: {
          endpoint: 'https://ardalis.us13.list-manage.com/subscribe/post?u=ddf5f72371bc4c837a6667f27&amp;id=40af84bfa3', 
      },
    },
    `gatsby-plugin-material-ui`,
    'disqus-react',
    'react-markdown',
    'gatsby-plugin-netlify-cms',
    {
      resolve: 'gatsby-plugin-purgecss', // purges all unused/unreferenced css rules
      options: {
        develop: true, // Activates purging in npm run develop
        purgeOnly: ['/all.sass'], // applies purging only on the bulma css file
      },
    }, // must be after other CSS plugins
    'gatsby-plugin-netlify', // make sure to keep it last in the array
  ],
}