MIGRATION.md

Migration guide

To move one of our old Hexo-based sites to Gatsby using this theme, you can follow these steps:

1. Clean house

First, clone the repo and move into the docs directory (cd docs). Delete that directory's package-lock.json file and node_modules directory, and edit the package.json file to look like this:

{
  "scripts": {
    "start": "gatsby develop --prefix-paths"
  }
}

Change the name of the public directory (this typically contains the _redirects Netlify file) to static.

mv public static

You'll also need to edit the docs directory's .gitignore to reflect this change. You'll want to ignore the entire public directory, as well as the .cache directory. These changes will typically look like this:

  public/*
- !public/_redirects
+ .cache

2. Install dependencies

$ npm install gatsby gatsby-theme-apollo-docs

That was easy!

3. Port _config.yml to gatsby-config.js

All of this theme's configuration options are represented in existing Hexo _config.yml files. Moving them over is just a matter of copying and pasting, modifying some property names, and changing snake_case names to camelCase ones. In addition, you must add a root option and set it to __dirname. For example, here's a before/after of the iOS docs configs:

_config.yml

title: Apollo iOS Guide # called `subtitle` in gatsby-config.js
subtitle: Apollo iOS Guide # not needed
description: A guide to using Apollo with iOS
versions:
  - '1' # if there's only one version, you don't need to port this option
sidebar_categories:
  null:
    - index
    - installation
    - api-reference
  Usage:
    - downloading-schema
    - initialization
    - fetching-queries
    - fragments
    - watching-queries
    - mutations
github_repo: apollographql/apollo-ios
root: /docs/ios/ # called `pathPrefix` in gatsby-config.js
content_root: docs/source # not required, but called `contentDir` in gatsby-config.js
url: https://www.apollographql.com/docs/ios/ # not needed
public_dir: public/docs/ios # not needed

gatsby-config.js

const themeOptions = require('gatsby-theme-apollo-docs/theme-options');

module.exports = {
  pathPrefix: '/docs/ios', // similar to `root` in _config.yml
  plugins: [
    {
      resolve: 'gatsby-theme-apollo-docs',
      options: {
        ...themeOptions, // spread the default Apollo theme options
        root: __dirname, // this is the only new property added
        subtitle: 'Apollo iOS Guide',
        description: 'A guide to using Apollo with iOS',
        githubRepo: 'apollographql/apollo-ios',
        sidebarCategories: {
          null: [
            'index',
            'installation',
            'api-reference'
          ],
          Usage:[
            'downloading-schema',
            'initialization',
            'fetching-queries',
            'fragments',
            'watching-queries',
            'mutations',
          ]
        }
      }
    }
  ]
};

4. Add a Netlify config

Add a netlify.toml file to the repo root. It should contain base, publish, and command properties. The base and publish properties should always be docs/ and docs/public/, respectively. The command property will build the site using the gatsby build command, and then move the built website into the appropriate directory to be served using Fly.io. You should edit the directory names in that property to reflect the pathPrefix option that you provided in your gatsby-config.js file. Here's an example of the iOS docs Netlify config:

[build]
  base    = "docs/"
  publish = "docs/public/"
  command = "gatsby build --prefix-paths && mkdir -p docs/ios && mv public/* docs/ios && mv docs public/ && mv public/docs/ios/_redirects public"
[build.environment]
  NPM_VERSION = "6"

5. Deploy

When these changes are pushed to GitHub and a pull request is opened, Netlify will build a deploy preview so you can check out the changes made. When you open the deploy preview in your web browser, be sure to append the pathPrefix to the URL. In the example of the iOS docs, the URL would look like this: https://deploy-preview-471--apollo-ios-docs.netlify.com/docs/ios