nextein

A static site generator based in Next.js

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What is it?

nextein is a wrapper around next.js that allows you to write static sites using markdown and react.

Requirements

NodeJS v10.x+ is required to run nextein commands.

Starter Kit

If you want to jump into a starter project check nextein-starter

Getting Started

There are a few steps you have to follow to get your site up and running with nextein

• Create a project:

  • mkdir my-site
  • cd my-site
  • npm init -y

• Install Dependencies

  • npm i nextein next react react-dom

• Add a next.config.js config file

  const { withNextein } = require('nextein/config')
  
  module.exports = withNextein({
  
  })
  
  

• Create pages/index.js

  import React from 'react'
  
  import withPosts from 'nextein/posts'
  import Content from 'nextein/content'
  
  export default withPosts( ({ posts }) => {
    return (
      <section>
      {
        posts.map(post => <Content {...post} />)
      }
      </section>
    )
  })
  
  

• Create a markdown post entry under posts folder (posts/my-first-post.md)

  ---
  title: First Post
  category: post
  ---
  
  This is the first paragraph and it will be used as an excerpt when loaded in a `<Content excerpt />` tag.
  
  This paragraph should *not* appear in that list.
  
  

• Add npm scripts to run dev mode to your package.json

  "scripts": {
    "dev": "nextein"
  }
  

• Run the development server

  • npm run dev
  • open http://localhost:3000

• Add another npm script to your package.json to export the site

  "scripts": {
    "dev": "nextein",
    "export": "nextein build && nextein export"
  }
  

Documentation

withPosts

HOC for /pages components that renders a list of posts. It makes the post list available thru the posts property.

import withPosts from 'nextein/posts'

export default withPosts( ({ posts }) => { /* render your posts here */ } )

inCategory(category, options)

Filter function to be applied to posts to retrieve posts in a given category.

• category: {String} The category to filter results.
• options : {Object} Optional
  • includeSubCategories: Boolean true to include posts in sub categories. Default: false

Categories are resolved by the folder structure by default. This means that a post located at posts/categoryA/subOne will have a category categoryA/subOne unless you specify the category name in frontmatter.

import withPosts from 'nextein/posts'
import { inCategory } from 'nextein/filters'

export default withPosts( ({ posts }) => { 
  const homePosts = posts.filter(inCategory('home'))
  /* render your homePosts here */ 
} )

If you want to retrieve all posts under a certain category, let's say categoryA which will include all those under subOne, use the options includeSubCategories: true.

import withPosts from 'nextein/posts'
import { inCategory } from 'nextein/filters'

export default withPosts( ({ posts }) => { 
  const categoryAPosts = posts
    .filter(inCategory('categoryA', { includeSubCategories: true }))
  /* render your categoryAPostsmePosts here */ 
} )

withPostsFilterBy(filter)

Returns an HOC that gets all posts filtered out by the given filter function. This can be used in conjunction with inCategory to get only the desired posts in a certain category.

import { withPostsFilterBy } from 'nextein/posts'
import { inCategory } from 'nextein/filters'

const withCategoryAPosts = withPostsFilterBy(inCategory('categoryA'))

export default withCategoryAPosts(({ posts }) => { 
 /* render your posts here */ 
})

sortByDate

Sort function to be applied to posts to sort by date (newest on top). This requires that the post contains a date in frontmatter or in the file name (ala jekyll)

import withPosts, { sortByDate } from 'nextein/posts'

export default withPosts( ({ posts }) => { 
  posts.sort(sortByDate)
  /* render your posts here */ 
} )

withPost

HOC for /pages components that renders a single post. It makes the post available thru the post property.

import withPost from 'nextein/post'

export default withPost( ({ post }) => { /* render your post here */ } )

Content

Component to render a post object. This component receives the content from the post as a property. Use the excerpt property to only render the first paragraph (this is useful when rendering a list of posts).

• content: {Object} Markdown content in HAST format to be render. This is provided by post.content
• excerpt: {Boolean} true to only render the first paragraph. Optional. Default: false
• renderers: {Object} A set of custom renderers for Markdown elements with the form of [tagName]: renderer.
• component: {String|React.Component} The component used for the root node.

import withPost from 'nextein/post'
import Content from 'nextein/content'

export default withPost( ({ post }) => { return (<Content {...post} />) } )

Using the excerpt property

import withPosts, { inCategory } from 'nextein/posts'
import Content from 'nextein/content'

export default withPosts(({ posts }) => { 
  const homePosts = posts.filter(inCategory('home'))
  return (
    <section>
    {
      homePosts.map( (post, idx) => <Content key={idx} {...post} excerpt/> )
    }
    </section>
  )
})

Using renderers to change/style the <p> tag

import withPost from 'nextein/post'
import Content from 'nextein/content'

const Paragraph = ({ children }) => (<p style={{padding:10, background: 'silver'}}> { children } </p> )

export default withPost(({ post }) => { 
  return (
    <Content {...post} 
      renderers={{
        p: Paragraph 
      }}
    />
  ) 
})

Link

You can use nextein/link with the exact same parameters as next/link. This component wraps the next/link to simplify creating a Link for a given post object. When passing a post.data.url to href it will generate the underlying next/link with the post information.

• data: {Object} Post frontmatter object. This is provided by post.data

import withPosts from 'nextein/posts'
import Link from 'nextein/link'

export default withPosts( ({ posts }) => (
  <section>
  {
    posts.map( (post, idx) => {
      return (
        <div>
          <h1>{post.data.title}</h1>
          <Content key={idx} {...post} excerpt/>
          <Link {...post}><a>Read More...</a></Link>
      </div>
      )
    })    
  }
  </section>
))

post

• data is the frontmatter object containig the post meta information (title, page, category, etc)
  • data.url is the generated url for the post
  • data.category is the post's category. When not specified, if the post is inside a folder, the directory structure under posts will be used.
  • data.date: JSON date from frontmatter's date or date in file name or file creation date
• content is representation of post content (generally in HAST format) created by the build plugin for a given mimeType.

{ data, content } = post

frontmatter

There are only a few defined properties in the frontmatter metadata that is used by nextein

---
page: my-awesome-post
category: categoryOne
date: 2017-06-23

---

Post Content...

• page: the component under /pages that will be used to render the post (default to post which reads /pages/post component) Note: If you have an entry that should not be rendered by its own page (such as a part of an index file only) use page: false to avoid generating the url and exporting entry.
• category: the category name (optional)
• date: date string in YYYY-MM-DD format. Used to sort posts list. (optional)
• published: Set to false to remove this post from entries.
• permalink: Set the url using any parameter in the frontmatter object. Default value /:category?/:name. The ? means the parameter will be optional.
• name: Read Only The post file name. Date is removed from name if present.
• url: Read Only The post url.

fetcher

Status: Experimental

Dynamic Routes and static generator functions (getStaticProps and getStaticPaths) can be used with this new experimental feature.

NOTE: For now, all posts rendered in a dynamic route require to have page: false.

Example for a [name].js dynamic route

import fetcher from 'nextein/fetcher'

const { getData, getPost } = fetcher(/* filter */)

export async function getStaticPaths () {
  const data = await getData()
  return {
    paths: data.map(({ name }) => ({ params: { name } })),
    fallback: false
  }
}

export async function getStaticProps ({ params }) {
  const post = await getPost(params)
  return { props: { post } }
}

export default function Post ({ post }) {
  //...
}

Example for a [[...name]].js dynamic route:

import fetcher from 'nextein/fetcher'
import { inCategory } from 'nextein/filters'

const { getData, getPosts, getPost } = fetcher(inCategory('guides'))

export async function getStaticPaths () {
  const data = await getData()
  return {
    paths: [{ params: { name: [] } },
      ...data.map(({ name }) => ({ params: { name: [name] } }))
    ],
    fallback: false
  }
}

export async function getStaticProps ({ params }) {
  const posts = await getPosts()
  const post = await getPost(params) // This can be null if not matching `...name`
  return { props: { posts, post } }
}

export default function Guides ({ posts, post }) {
  //...
}

Caveats

• Post are required to be marked with page: false.
• No fast refresh for post changes.
• The nextein Link won't work since page is set to false.

withNextein

A wrapper configuration function to be applied into the next.config.js. It provides a way to add your own next.js config along with nextein internal next.js config.

next.config.js

const { withNextein } = require('nextein/config')

module.exports = withNextein({
  // Your own next.js config here
})

You can also define nextein plugins using the withNextein configuration:

const { withNextein } = require('nextein/config')

module.exports = withNextein({
  nextein: {
    plugins: [
      //your nextein plugins here
    ]
  }
  // Your own next.js config here
})

The nextein.plugins configuration accepts an array of plugins with the following formats:

• ['plugin-name']: Just a string to define the plugin.
• ['plugin-name', { }]: A string to define the plugin and a plugins options object.

The plugin name should be a pre-installed plugin (nextein-plugin-markdown) , or a local file (./myplugins/my-awesome-plugin)

Default Plugins

The default configuration includes:

plugins: [
  ['nextein-plugin-source-fs', { path: 'posts' }],
  'nextein-plugin-markdown',
  'nextein-plugin-filter-unpublished'
]

nextein-plugin-source-fs

Read files from file system.

Options:

• path: Path to read files from.
• includes: Default to **/*.*.
• ignore: A set of ignored files. The default list includes:

  '**/.DS_Store',
  '**/.gitignore',
  '**/.npmignore',
  '**/.babelrc',
  '**/node_modules',
  '**/yarn.lock',
  '**/package-lock.json'
  

nextein-plugin-markdown

Render markdown files.

Options:

• raw: Default to true. Make this false to not add the raw content in the post object.
• position: Default to false. Make this true to add the position info to post content HAST.
• rehype: Default to []. Add a set of plugins for rehype
• remark: Default to []. Add a set of plugins for remark

nextein-plugin-filter-unpublished

Filter posts by using a property to prevent draft / unpublished entries to be displayed.

Options:

• field: Default to'published'. Will check if a field is present in post data and filter if set to false.

Plugins

You can write your own plugins. There are basically 2 different types (source and transforms). Source plugins will be called to generate the posts entries and then the transform plugins will receive those entries and can modify, filter, append, or transform in anyway the posts list.

See plugins & lifecyle design document.

Contributors

Code Contributors

This project exists thanks to all the people who contribute. [Contribute].

Financial Contributors

Become a financial contributor and help us sustain our community. [Contribute]

Individuals

Organizations

Support this project with your organization. Your logo will show up here with a link to your website. [Contribute]