使用Jekyll检查文件是否存在 [英] Check for existence of file using Jekyll

问题描述

如何使用Jekyll测试文件的存在?

How can I use Jekyll to test for the existence of a file?

为澄清起见，我想运行{% if %}语句来检查是否存在与我所在页面同名的图像文件.

To clarify, I want to run an {% if %} statement to check if an image file exists with the same name as the page I am on.

在我的页面上，YAML至关重要:

On my page in the YAML front matter:

----
  reference-design: true
----

在我的布局中:

{% if page.reference-design %}
    {% assign filename = page.path | remove_first: '.html' %}
    <!-- How can I check if file actually exists? -->
    <img src="images/reference_designs/{{ filename }}.png">
{% endif %}

推荐答案

从Jekyll 2开始，所有站点文件都可以通过site.static_files获得.您可以使用它来检查文件是否存在.例如:

As of Jekyll 2, all site files are available via site.static_files. You can use this to check if a file exists. For example:

{% for static_file in site.static_files %}
    {% if static_file.path == '/favicon.ico' %}
        {% assign favicon = true %}
    {% endif %}
{% endfor %}

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