Allow going back to a previous commit

templates/history/index.html.twig

@@ -0,0 +1,19 @@
+{% extends 'base/base.html.twig' %}
+
+{% block title %}Snip {{ snip }}{% endblock %}
+
+{% block body %}
+    <a href="{{ path('snip_single', {snip: snip.id}) }}" class="btn btn-primary">
+        <i class="fa fa-arrow-left"></i> Back
+    </a>
+    <a href="{{ path('history_set', {commit: 'master', snip: snip.id}) }}" class="btn btn-primary">
+        <i class="fa fa-reset"></i> Reset to latest
+    </a>
+    <div class="list-group">
+        {% for commit in commits %}
+            <a class="list-group-item" href="{{ path('history_set', {commit: commit.hash, snip: snip.id}) }}">
+                {{ commit.date|date }} - {{ commit.hash }}
+            </a>
+        {% endfor %}
+    </div>
+{% endblock %}

templates/snip/single.html.twig

@@ -10,6 +10,9 @@
         <a class="btn btn-warning" href="{{ path('snip_edit', {snip: snip.id}) }}">
             <i class="fa fa-pencil" aria-hidden="true"></i> Edit
         </a>
+        <a class="btn btn-info" href="{{ path('history_index', {snip: snip.id}) }}">
+            <i class="fa fa-history" aria-hidden="true"></i> History
+        </a>
     {% endif %}
     <a href="{{ path('snip_raw', {snip: snip.id}) }}" class="btn btn-danger">
         <i class="fa fa-eye"></i> Raw