Add farmOS/farmOS as a source.

gatsby-config.js

@@ -17,7 +17,20 @@ module.exports = {
         icon: "src/images/icon.png",
       },
     },
-    "gatsby-transformer-remark",
+    {
+      resolve: "gatsby-transformer-remark",
+      options: {
+        plugins: [
+          {
+            resolve: "gatsby-remark-prefix-relative-links",
+            options: {
+              sourceName: "farmOS",
+              prefix: "/farmos/docs",
+            },
+          },
+        ],
+      },
+    },
     "gatsby-plugin-sharp",
     "gatsby-transformer-sharp",
     {
@@ -36,5 +49,14 @@ module.exports = {
       },
       __key: "pages",
     },
+    {
+      resolve: "gatsby-source-git",
+      options: {
+        name: "farmOS",
+        remote: "https://github.com/farmOS/farmOS.git",
+        branch: "2.x",
+        patterns: "docs/**",
+      },
+    },
   ],
 };

gatsby-node.js

@@ -0,0 +1,52 @@
+const path = require('path');
+const { createFilePath } = require('gatsby-source-filesystem');
+
+exports.onCreateNode = ({ node, getNode, actions }) => {
+  const { createNodeField } = actions;
+  // Ensures we are processing only markdown files
+  if (node.internal.type === "MarkdownRemark") {
+    // Use `createFilePath` to turn markdown files in our `data/faqs` directory into `/faqs/slug`
+    const relativeFilePath = createFilePath({
+      node,
+      getNode,
+      basePath: ".cache/gatsby-source-git",
+    });
+    const { sourceInstanceName } = getNode(node.parent);
+
+    // Creates new query'able field with name of 'slug'
+    createNodeField({
+      node,
+      name: "slug",
+      value: `/${sourceInstanceName.toLowerCase()}${relativeFilePath}`,
+    });
+  }
+};
+
+exports.createPages = async ({ graphql, actions }) => {
+  const { createPage } = actions;
+  const result = await graphql(`
+    query {
+      allMarkdownRemark {
+        edges {
+          node {
+            fields {
+              slug
+              sourceName
+            }
+          }
+        }
+      }
+    }
+  `);
+  result.data.allMarkdownRemark.edges.forEach(({ node }) => {
+    createPage({
+      path: node.fields.slug,
+      component: path.resolve(`./src/templates/docs-page.js`),
+      context: {
+        // Data passed to context is available
+        // in page queries as GraphQL variables.
+        slug: node.fields.slug,
+      },
+    });
+  });
+};