downloads: show last 5 beta versions

dolweb/downloads/templates/downloads-index.html

@@ -27,6 +27,23 @@
     <h1>{% trans "Download" %}</h1>
 </div>
 
+<div id="download-beta">
+<h1>{% trans "Beta versions" %}</h1>
+
+<div class="alert">{% blocktrans %}
+    <p>Beta versions are released every month, usually accompanied by a
+    <em>Progress Report</em> article. They are a good balance between the Dolphin
+    <a href="#download-dev">development versions</a> and the
+    <a href="#download-stable">stable versions</a>.</p>
+
+    <div class="alert alert-info">The beta versions require the <a href="https://support.microsoft.com/en-us/help/2977003/the-latest-supported-visual-c-downloads">64-bit Visual C++ redistributable for Visual Studio 2019</a>
+    to be installed.</div>
+{% endblocktrans %}</div>
+
+{% include "downloads-devrel.html" with builds=beta_builds primclass='btn-info' %}
+
+</div>
+
 <div id="download-dev">
 <h1>{% trans "Development versions" %}</h1>
 

dolweb/downloads/views.py

@@ -11,6 +11,7 @@
 from django.views.decorators.vary import vary_on_headers
 from dolweb.downloads.diggpaginator import DiggPaginator
 from dolweb.downloads.models import Artifact, BranchInfo, DevVersion, ReleaseVersion
+from dolweb.update.models import UpdateTrack
 
 import hashlib
 import hmac
@@ -28,10 +29,14 @@ def index(request):
     master_builds = (DevVersion.objects.filter(branch='master')
                                        .order_by('-date')
                                        [:10])
+    beta_track = (UpdateTrack.objects.filter(name='beta')
+                                     .order_by('-version__date')
+                                     [:5])
+    beta_builds = [track.version for track in beta_track]
     last_master = master_builds[0] if len(master_builds) else None
 
     return { 'releases': releases, 'master_builds': master_builds,
-             'last_master': last_master }
+             'beta_builds': beta_builds, 'last_master': last_master }
 
 @cache_control(max_age=15)
 @vary_on_headers('User-Agent')