Add rss feed

Signed-off-by: Harry Chen <i@harrychen.xyz>

_config.yml

@@ -13,6 +13,7 @@ school: 清华大学
 brand: Tsinghua Open Source Mirror
 operator: 清华大学信息化技术中心
 author: Tsinghua University TUNA Association
+desc: 致力于为国内和校内用户提供高质量的开源软件镜像、Linux 镜像源服务，帮助用户更方便地获取开源软件。本镜像站由清华大学 TUNA 协会负责运行维护。
 # operator: 北外信息技术中心
 logo: true
 meow_404: true

_includes/head.html

@@ -3,7 +3,7 @@
 <meta http-equiv="X-UA-Compatible" content="IE=edge">
 <meta name="viewport" content="width=device-width, initial-scale=1">
 
-{% capture page_desc %}{% if include.metaDesc %}{{ include.metaDesc }} | {% if include.cattitle %}{{ include.cattitle }} | {% endif %}{% endif %}{{ site.title }}，致力于为国内和校内用户提供高质量的开源软件镜像、Linux 镜像源服务，帮助用户更方便地获取开源软件。本镜像站由清华大学 TUNA 协会负责运行维护。{% endcapture %}
+{% capture page_desc %}{% if include.metaDesc %}{{ include.metaDesc }} | {% if include.cattitle %}{{ include.cattitle }} | {% endif %}{% endif %}{{ site.title }}，{{ site.desc }}{% endcapture %}
 {% capture page_title %}{% if page.mirrorid %} {{ page.mirrorid }} |{% elsif page.title %} {{ page.title }} |{% endif %}{% if include.cattitle %} {{ include.cattitle }} |{% endif %}{% if (page.title or include.cattitle) %}{{" "}}{% endif %}{{ site.title }}{% if site.brand %} | {{ site.brand }}{% endif %}{% endcapture %}
 
 <meta name="description" content="{{ page_desc }}">

feed.xml

@@ -0,0 +1,26 @@
+---
+---
+<?xml version="1.0" encoding="UTF-8"?>
+<?xml-stylesheet type="text/css" href="{{ "/static/css/rss.css" | prepend: site.baseurl }}" ?>
+<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom">
+  <channel>
+    <title>{{ site.title | xml_escape }}</title>
+    {% capture desc %}{{ site.title }}，{{ site.desc }}{% endcapture %}
+    <description>{{ desc | xml_escape }}</description>
+    <link>{{ site.url }}{{ site.baseurl }}/</link>
+    <atom:link href="{{ "/feed.xml" | prepend: site.baseurl | prepend: site.url }}" rel="self" type="application/rss+xml" />
+    <pubDate>{{ site.time | date_to_rfc822 }}</pubDate>
+    <lastBuildDate>{{ site.time | date_to_rfc822 }}</lastBuildDate>
+    <generator>Jekyll v{{ jekyll.version }}</generator>
+    {% for post in site.categories["news"] limit:20 %}
+      <item>
+        <title>{{ post.title | xml_escape }}</title>
+        <description>{{ post.content | xml_escape }}</description>
+        {% if post.author %}<author>{{ post.author }}</author>{% endif %}
+        <pubDate>{{ post.date | date_to_rfc822 }}</pubDate>
+        <link>{{ post.url | prepend: site.baseurl | prepend: site.url }}</link>
+        <guid isPermaLink="true">{{ post.url | prepend: site.baseurl | prepend: site.url }}</guid>
+      </item>
+    {% endfor %}
+  </channel>
+</rss>

static/css/rss.css

@@ -0,0 +1,68 @@
+* {
+	padding: 0px;
+	margin: 0px;
+	display: block;
+}
+rss {
+	display: block;
+	font-family: sans-serif;
+	background-color: #f2f2f2;
+	color: #222222;
+	font-size: 13px;
+}
+channel > title {
+	font-size: 24px;
+	font-weight: bold;
+	margin: 10px 0px;
+}
+channel {
+	width: 728px;
+	margin-left: auto;
+	margin-right: auto;
+}
+channel > item {
+	background-color: #ffffff;
+	border: 1px solid #d8d8d8;
+	padding: 20px;
+	margin-bottom: 15px;
+}
+	item > link, item > pubDate {
+		color: #888888;
+		font-size: 12px;
+		border-bottom: 1px solid #f0f0f0;
+		margin-bottom: 5px;
+		padding-bottom: 5px;
+	}
+	item > link {
+		float: right;
+		text-align: right;
+		width: 66.66%;
+	}
+	item > pubDate {
+		float: left;
+		width: 33.33%;
+	}
+	item > title {
+		color: #00579B;
+		font-size: 18px;
+		margin-bottom: 5px;
+	}
+	item > description {
+		margin-bottom: 10px;
+	}
+	item > category {
+		background-color: #efefef;
+		border: 1px solid #dadada;
+		border-radius: 3px;
+		padding: 2px 4px;
+		display: inline-block;
+		color: #888888;
+		transition: color 0.3s linear;
+	}
+	item > category:hover {
+		color: #222222;
+	}
+
+lastBuildDate, language, guid, channel > link {
+	display: none;
+}