是否将jekyll/液体模板数据包含在YAML变量中? [英] Include jekyll / liquid template data in a YAML variable?

问题描述

我正在使用markdown文件的YAML标题向博客文章中添加excerpt变量，以便在其他地方使用.在这些摘录之一中，我通过markdown链接标记引用了较早的博客文章，并且我使用液体模板数据变量{{ site.url }}代替了网站的基本URL.

I am using the YAML heading of a markdown file to add an excerpt variable to blog posts that I can use elsewhere. In one of these excerpts I refer to an earlier blog post via markdown link markup, and I use the liquid template data variable {{ site.url }} in place of the base URL of the site.

所以我有类似的东西(将其修剪一些)

So I have something like (trimmed it somewhat)

--- 
title: "Decluttering ordination plots in vegan part 2: orditorp()"
status: publish
layout: post
published: true
tags: 
- tag1
- tag2
excerpt: In the [earlier post in this series]({{ site.url }}/2013/01/12/
decluttering-ordination-plots-in-vegan-part-1-ordilabel/ "Decluttering ordination
plots in vegan part 1: ordilabel()") I looked at the `ordilabel()` function
----

但是，jekyll和Maruku md解析器不喜欢这样，这使我怀疑您不能在YAML标头中使用液体标记.

However, jekyll and the Maruku md parser don't like this, which makes me suspect that you can't use liquid markup in the YAML header.

是否可以在jekyll处理的页面的YAML标头中使用液体标记?

Is it possible to use liquid markup in the YAML header of pages handled by jekyll?

1. 如果是，我在所示示例中做错了什么?
2. 如果不允许 ，我还能实现谁的目标?我目前正在用笔记本电脑开发网站，并且不想对基本URL进行硬编码，因为在准备部署时必须对其进行更改.

1. If it is, what I am I doing wrong in the example shown?
2. If it is not allowed, who else can I achieve what I intended? I am currently developing my site on my laptop and don't want to hard code the base URL as it'll have to change when I am ready to deploy.

我从丸古得到的错误是:

The errors I am getting from Maruku are:

| Maruku tells you:
+---------------------------------------------------------------------------
| Must quote title
| ---------------------------------------------------------------------------
|  the [earlier post in this series]({{ site.url }}/2013/01/12/decluttering-o
| --------------------------------------|-------------------------------------
|                                       +--- Byte 40

和

| Maruku tells you:
+---------------------------------------------------------------------------
| Unclosed link
| ---------------------------------------------------------------------------
| the [earlier post in this series]({{ site.url }}/2013/01/12/decluttering-or
| --------------------------------------|-------------------------------------
|                                       +--- Byte 41

和

| Maruku tells you:
+---------------------------------------------------------------------------
| No closing ): I will not create the link for ["earlier post in this series"]
| ---------------------------------------------------------------------------
| the [earlier post in this series]({{ site.url }}/2013/01/12/decluttering-or
| --------------------------------------|-------------------------------------
|                                       +--- Byte 41

推荐答案

我认为不可能在YAML中嵌套液体变量.至少，我还没有弄清楚该怎么做.

I don't believe it's possible to nest liquid variables inside YAML. At least, I haven't figure out how to do it.

一种可行的方法是使用液体的替换过滤器.具体来说，定义要用于变量替换的字符串(例如!SITE_URL!).然后，使用替换过滤器在输出期间将其切换到所需的Jekyll变量(例如site.url).这是一个缩小的.md文件，在我的kykyll 0.11安装中其行为与预期的一样:

One approach that will work is to use a Liquid's replace filter. Specifically, define a string that you want to use for the variable replacement (e.g. !SITE_URL!). Then, use the replace filter to switch that to your desired Jekyll variable (e.g. site.url) during the output. Here's a cut down .md file that behaves as expected on my jekyll 0.11 install:

---
layout: post

excerpt: In the [earlier post in this series](!SITE_URL!/2013/01/12/)

---

{{ page.excerpt | replace: '!SITE_URL!', site.url }}

测试在我的计算机上是否正确插入了URL，然后按预期将其从markdown转换为HTML链接.如果要替换的项不止一个，则可以将多个替换调用串在一起.

Testing that on my machine, the URL is inserted properly and then translated from markdown into an HTML link as expected. If you have more than one item to replace, you can string multiple replace calls together.

---
layout: post

my_name: Alan W. Smith
multi_replace_test: 'Name: !PAGE_MY_NAME! - Site: [!SITE_URL!](!SITE_URL!)'

---

{{ page.multi_replace_test | replace: '!SITE_URL!', site.url | replace: '!PAGE_MY_NAME!', page.my_name }}

重要说明是，您必须显式设置site.url 值.您无法免费获得Jekyll的免费服务.您可以使用以下方法在_config.yml文件中进行设置:

An important note is that you must explicitly set the site.url value. You don't get that for free with Jekyll. You can either set it in your _config.yml file with:

url: http://alanwsmith.com

或者，在致电jekyll时定义它:

Or, define it when you call jekyll:

jekyll --url http://alanwsmith.com

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