feat: add local search component

Author: Justin

packages/gatsby-theme-apollo-local-search/.gitignore

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+node_modules

packages/gatsby-theme-apollo-local-search/README.md

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+# gatsby-theme-apollo-local-search
+
+A Gatsby theme extension that allows local search.
+
+## Installation
+
+
+```bash
+npm install gatsby-theme-apollo-local-search
+```
+
+## Usage
+
+Add `gatsby-theme-apollo-local-search` as a plugin in your Gatsby config.  Configure content
+to match your contentDir and root to match the root dir of your gatsby theme.
+
+```js
+// gatsby-config.js
+module.exports = {
+  plugins: ['gatsby-theme-apollo-local-search', {options:{root:__dirname, contentDir:'content'}}]
+};
+```

packages/gatsby-theme-apollo-local-search/gatsby-config.js

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+const {join, relative} = require('path');
+module.exports = ({root, contentDir = 'content'}) => ({
+  plugins: [
+    // You can have multiple instances of this plugin to create indexes with
+    // different names or engines. For example, multi-lingual sites could create
+    // an index for each language.
+    {
+      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: `
+          {
+  allMarkdownRemark {
+    nodes {
+      excerpt(format: PLAIN, pruneLength: 100, truncate: true)
+      id
+      fileAbsolutePath
+      rawMarkdownBody
+      frontmatter {
+        description
+        subtitle
+        title
+      }
+    }
+  }
+}
+        `,
+
+        // 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', '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', 'path', 'title', 'excerpt'],
+
+        // 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: {
+            allMarkdownRemark: {nodes}
+          }
+        }) {
+          //relative to the content.
+          const relTo = join(root, contentDir);
+          return nodes.map(
+            ({
+              id,
+              frontmatter,
+              fileAbsolutePath,
+              rawMarkdownBody: body,
+              excerpt
+            }) => ({
+              id,
+              body,
+              excerpt,
+              path: relative(relTo, fileAbsolutePath),
+              title: frontmatter && frontmatter.title
+            })
+          );
+        }
+      }
+    }
+  ]
+});

packages/gatsby-theme-apollo-local-search/index.js

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+//noop