140 lines
5.4 KiB
Markdown
140 lines
5.4 KiB
Markdown
---
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title: Upgrading from 0.x to 2.x
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permalink: /docs/upgrading/0-to-2/
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---
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Upgrading from an older version of Jekyll? A few things have changed in 1.0
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and 2.0 that you'll want to know about.
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Before we dive in, go ahead and fetch the latest version of Jekyll:
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```sh
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$ gem update jekyll
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```
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<div class="note feature">
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<h5 markdown="1">Diving in</h5>
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<p markdown="1">Want to get a new Jekyll site up and running quickly? Simply
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run <code>jekyll new SITENAME</code> to create a new folder with a bare bones
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Jekyll site.</p>
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</div>
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### The Jekyll Command
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For better clarity, Jekyll now accepts the commands `build` and `serve`.
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Whereas before you might simply run the command `jekyll` to generate a site
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and `jekyll --server` to view it locally, in v2.0 (and later) you should
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use the subcommands `jekyll build` and `jekyll serve` to build and preview
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your site.
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<div class="note info">
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<h5>Watching and Serving</h5>
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<p markdown="1">With the new subcommands, the way sites are previewed locally
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changed a bit. Instead of specifying `server: true` in the site's
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configuration file, use `jekyll serve`. The same holds true for
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`watch: true`. Instead, use the `--watch` flag with either `jekyll serve`
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or `jekyll build`.</p>
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</div>
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### Absolute Permalinks
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In Jekyll v1.0, we introduced absolute permalinks for pages in
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subdirectories. Starting with v2.0, absolute permalinks are opt-out,
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meaning Jekyll will default to using absolute permalinks instead of
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relative permalinks. Relative permalink backwards-compatibility was removed in v3.0.
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<div class="note warning" id="absolute-permalinks-warning">
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<h5 markdown="1">Absolute permalinks will be required in v3.0 and on</h5>
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<p markdown="1">
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Starting with Jekyll v3.0, relative permalinks functionality will be removed and thus unavailable for use.
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</p>
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</div>
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### Draft Posts
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Jekyll now lets you write draft posts, and allows you to easily preview how
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they will look prior to publishing. To start a draft, simply create a folder
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called `_drafts` in your site's source directory (e.g., alongside `_posts`),
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and add a new markdown file to it. To preview your new post, simply run the
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`jekyll serve` command with the `--drafts` flag.
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<div class="note info">
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<h5 markdown="1">Drafts don't have dates</h5>
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<p markdown="1">
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Unlike posts, drafts don't have a date, since they haven't
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been published yet. Rather than naming your draft something like
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`2013-07-01-my-draft-post.md`, simply name the file what you'd like your
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post to eventually be titled, here `my-draft-post.md`.</p>
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</div>
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### Custom Config File
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Rather than passing individual flags via the command line, you can now pass
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an entire custom Jekyll config file. This helps to distinguish between
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environments, or lets you programmatically override user-specified
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defaults. Simply add the `--config` flag to the `jekyll` command, followed
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by the path to one or more config files (comma-delimited, no spaces).
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#### As a result, the following command line flags are now deprecated:
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* `--no-server`
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* `--no-auto` (now `--no-watch`)
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* `--auto` (now `--watch`)
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* `--server`
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* `--url=`
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* `--maruku`, `--rdiscount`, and `--redcarpet`
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* `--pygments`
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* `--permalink=`
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* `--paginate`
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<div class="note info">
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<h5>The config flag explicitly specifies your configuration file(s)</h5>
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<p markdown="1">If you use the `--config` flag, Jekyll will ignore your
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`_config.yml` file. Want to merge a custom configuration with the normal
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configuration? No problem. Jekyll will accept more than one custom config
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file via the command line. Config files cascade from right to left, such
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that if I run `jekyll serve --config _config.yml,_config-dev.yml`,
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the values in the config files on the right (`_config-dev.yml`) overwrite
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those on the left (`_config.yml`) when both contain the same key.</p>
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</div>
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### New Config File Options
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Jekyll 1.0 introduced several new config file options. Before you upgrade,
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you should check to see if any of these are present in your pre-1.0 config
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file, and if so, make sure that you're using them properly:
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* `excerpt_separator`
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* `host`
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* `include`
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* `keep_files`
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* `layouts`
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* `show_drafts`
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* `timezone`
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* `url`
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### Baseurl
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Often, you'll want the ability to run a Jekyll site in multiple places,
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such as previewing locally before pushing to GitHub Pages. Jekyll 1.0 makes
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that easier with the new `--baseurl` flag. To take advantage of this
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feature, first add the production `baseurl` to your site's `_config.yml`
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file. Then, throughout the site, simply prefix relative URLs
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with `{% raw %}{{ site.baseurl }}{% endraw %}`.
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When you're ready to preview your site locally, pass along the `--baseurl`
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flag with your local baseurl (most likely `/`) to `jekyll serve` and Jekyll
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will swap in whatever you've passed along, ensuring all your links work as
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you'd expect in both environments.
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<div class="note warning">
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<h5 markdown="1">All page and post URLs contain leading slashes</h5>
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<p markdown="1">If you use the method described above, please remember
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that the URLs for all posts and pages contain a leading slash. Therefore,
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concatenating the site baseurl and the post/page url where
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`site.baseurl = /` and `post.url = /2013/06/05/my-fun-post/` will
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result in two leading slashes, which will break links. It is thus
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suggested that prefixing with `site.baseurl` only be used when the
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`baseurl` is something other than the default of `/`.</p>
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</div>
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