Add hook to generate the lastmod of posts

_includes/panel.html

@@ -10,8 +10,6 @@
 
   <div class="access">
 
-  {% if site.data.updates %}
-
   {% include update-list.html %}
   
   {% if update_list.size > 0 %}
@@ -21,23 +19,17 @@
       <ul class="post-content pl-0 pb-1 ml-1 mt-2">
 
       {% for item in update_list %}
-        {% assign post_url = item | split: "::" | last | url_encode | prepend: "/posts/" | append: "/" %}
-        {% assign post = site.posts | where: "url", post_url | first %}
-
-        {% if post %}
+        {% assign index = item | split: "::" | last | plus: 0 %}
+        {% assign post = site.posts[index] %}
         {% assign url = post.url | relative_url %}
         <li><a href="{{ url }}">{{ post.title }}</a></li>
-        {% endif %}
-
       {% endfor %}
 
       </ul>
-    </div><!-- #access-lastmod -->
+    </div> <!-- #access-lastmod -->
   
   {% endif %}
 
-  {% endif %} <!-- site.data.updates -->
-
   {% include trending-tags.html %}
 
   {% if trending_tags.size > 0 %}

_includes/update-list.html

@@ -10,11 +10,13 @@
 
 {% assign all_list = "" | split: "" %}
 
-{% for entry in site.data.updates %}
+{% for post in site.posts %}
+  {% if post.lastmod %}
     {% capture elem %}
-    {{- entry.lastmod -}}::{{- entry.filename -}}
+      {{- post.lastmod | date: "%Y%m%d%H%M%S" -}}::{{- forloop.index0 -}}
     {% endcapture %}
     {% assign all_list = all_list | push: elem %}
+  {% endif %}
 {% endfor %}
 
 {% assign all_list = all_list | sort | reverse %}

_layouts/post.html

@@ -31,22 +31,10 @@ layout: default
         </div>
 
         <!-- lastmod -->
-        {%- capture filename -%}
-          {{ page.url | split: "/" | last }}
-        {%- endcapture -%}
-
-        {% for item in site.data.updates %}
-          {% assign encode_filename = item.filename | url_encode %}
-          {% if filename == encode_filename %}
-            {% assign lastmod = item.lastmod %}
-            {% break %}
-          {% endif %}
-        {% endfor %}
-
-        {% if lastmod %}
+        {% if page.lastmod %}
         <div>
           Updated
-          {% include timeago.html date=lastmod class="lastmod" tooltip=true %}
+          {% include timeago.html date=page.lastmod class="lastmod" tooltip=true %}
         </div>
         {% endif %}
 
@@ -61,7 +49,6 @@ layout: default
       </div> <!-- .post-meta -->
 
       <div class="post-content">
-
         {%- capture img_placehodler -%}
           data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7
         {% endcapture%}

_plugins/posts-lastmod-hook.rb

@@ -0,0 +1,11 @@
+# Check for changed posts
+Jekyll::Hooks.register :posts, :post_init do |post|
+
+  commit_num = `git rev-list --count HEAD "#{ post.path }"`
+
+  if commit_num.to_i > 1
+    lastmod_date = `git log -1 --pretty="%ad" --date=iso "#{ post.path }"`
+    post.data['lastmod'] = lastmod_date
+  end
+
+end

feed.xml

@@ -30,10 +30,10 @@ layout: compress
     <title>{{ post.title }}</title>
     <link href="{{ post_absolute_url }}" rel="alternate" type="text/html" title="{{ post.title }}" />
     <published>{{ post.date | date_to_xmlschema }}</published>
-  {% if post.seo.date_modified %}
-    <updated>{{ post.seo.date_modified | date_to_xmlschema }}</updated>
+  {% if post.lastmod %}
+    <updated>{{ post.lastmod | date_to_xmlschema }}</updated>
   {% else %}
-    <updated>{{ site.time | date_to_xmlschema }}</updated>
+    <updated>{{ post.date | date_to_xmlschema }}</updated>
   {% endif %}
     <id>{{ post_absolute_url }}</id>
     <content src="{{ post_absolute_url }}" />

sitemap.xml

@@ -14,7 +14,11 @@ layout: compress
 {% for post in site.posts %}
   <url>
     <loc>{{ site.url | append: site.baseurl | append: post.url }}</loc>
-    <lastmod>{{ site.time | date_to_xmlschema }}</lastmod>
+    {% if post.lastmod %}
+      <lastmod>{{ post.lastmod | date_to_xmlschema }}</lastmod>
+    {% else %}
+      <lastmod>{{ post.date | date_to_xmlschema }}</lastmod>
+    {% endif %}
 
     {% if post.sitemap.changefreq %}
       <changefreq>{{ post.sitemap.changefreq }}</changefreq>
@@ -59,19 +63,9 @@ layout: compress
     {% continue %}
   {% endif %}
 
-  {% capture lastmod %}
-    {% if page.lastmod %}
-      {{ page.lastmod }}
-    {% elsif page.date %}
-      {{ page.date }}
-    {% else %}
-      {{ site.time }}
-    {% endif %}
-  {% endcapture %}
-
   <url>
     <loc>{{ site.url | append: site.baseurl | append: page.url | remove: "index.html" }}</loc>
-    <lastmod>{{ lastmod | date_to_xmlschema }}</lastmod>
+    <lastmod>{{ site.time | date_to_xmlschema }}</lastmod>
 
     {% if page.sitemap.changefreq %}
       <changefreq>{{ page.sitemap.changefreq }}</changefreq>