gatsby-config.js

const config = require("./data/SiteConfig");

const pathPrefix = config.pathPrefix === "/" ? "" : config.pathPrefix;

module.exports = {
  pathPrefix: config.pathPrefix,
  siteMetadata: {
    siteUrl: config.siteUrl + pathPrefix,
    rssMetadata: {
      site_url: config.siteUrl + pathPrefix,
      feed_url: config.siteUrl + pathPrefix + config.siteRss,
      title: config.siteTitle,
      description: config.siteDescription,
      image_url: `${config.siteUrl + pathPrefix}/logos/logo-512.png`,
      author: config.userName,
      copyright: config.copyright
    }
  },
  plugins: [
    "gatsby-plugin-react-helmet",
    "gatsby-plugin-styled-components",
    {
      resolve: `gatsby-plugin-google-fonts`,
      options: {
        fonts: [`crimson text:400, 400i, 700, 700i`, `space mono:400,700`]
      }
    },
    {
      resolve: "gatsby-source-filesystem",
      options: {
        name: "posts",
        path: `${__dirname}/content/`
      }
    },
    {
      resolve: "gatsby-transformer-remark",
      options: {
        plugins: [
          {
            resolve: "gatsby-remark-images",
            options: {
              maxWidth: 690
            }
          },
          {
            resolve: "gatsby-remark-responsive-iframe"
          },
          "gatsby-remark-prismjs",
          "gatsby-remark-copy-linked-files",
          "gatsby-remark-autolink-headers"
        ]
      }
    },
    {
      resolve: "gatsby-plugin-google-analytics",
      options: {
        trackingId: config.googleAnalyticsID
      }
    },
    {
      resolve: "gatsby-plugin-nprogress",
      options: {
        color: config.themeColor
      }
    },
    "gatsby-plugin-sharp",
    "gatsby-plugin-catch-links",
    "gatsby-plugin-twitter",
    "gatsby-plugin-sitemap",
    "gatsby-transformer-json",
    {
      resolve: "gatsby-plugin-manifest",
      options: {
        name: config.siteTitle,
        short_name: config.siteTitle,
        description: config.siteDescription,
        start_url: config.pathPrefix,
        background_color: config.backgroundColor,
        theme_color: config.themeColor,
        display: "minimal-ui",
        icons: [
          {
            src: "/logos/logo-192x192.png",
            sizes: "192x192",
            type: "image/png"
          },
          {
            src: "/logos/logo-512x512.png",
            sizes: "512x512",
            type: "image/png"
          }
        ]
      }
    },
    "gatsby-plugin-offline",
    {
      resolve: "gatsby-plugin-feed",
      options: {
        setup(ref) {
          const ret = ref.query.site.siteMetadata.rssMetadata;
          ret.allMarkdownRemark = ref.query.allMarkdownRemark;
          ret.generator = "GatsbyJS Material Starter";
          return ret;
        },
        query: `
        {
          site {
            siteMetadata {
              rssMetadata {
                site_url
                feed_url
                title
                description
                image_url
                author
                copyright
              }
            }
          }
        }
      `,
        feeds: [
          {
            serialize(ctx) {
              const rssMetadata = ctx.query.site.siteMetadata.rssMetadata;
              return ctx.query.allMarkdownRemark.edges.map(edge => ({
                categories: edge.node.frontmatter.tags,
                date: edge.node.frontmatter.date,
                title: edge.node.frontmatter.title,
                description: edge.node.excerpt,
                author: rssMetadata.author,
                url: rssMetadata.site_url + edge.node.fields.slug,
                guid: rssMetadata.site_url + edge.node.fields.slug,
                custom_elements: [{ "content:encoded": edge.node.html }]
              }));
            },
            query: `
            {
              allMarkdownRemark(
                limit: 1000,
                sort: { order: DESC, fields: [frontmatter___date] },
              ) {
                edges {
                  node {
                    excerpt
                    html
                    timeToRead
                    fields { slug }
                    frontmatter {
                      title
                      cover
                      date
                      category
                      tags
                    }
                  }
                }
              }
            }
          `,
            output: config.siteRss
          }
        ]
      }
    }
  ]
};