Add PGP key to the Release model

Add a pgp_key field to the Release model so we can display the PGP
fingerprint of the used PGP key on the download page.

Closes: #282

releng/migrations/0003_release_pgp_key.py

@@ -0,0 +1,19 @@
+# Generated by Django 3.0.6 on 2020-05-22 22:14
+
+import devel.fields
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('releng', '0002_auto_20181216_1605'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='release',
+            name='pgp_key',
+            field=devel.fields.PGPKeyField(blank=True, help_text='consists of 40 hex digits; use `gpg --fingerprint`', max_length=40, null=True, verbose_name='PGP key fingerprint'),
+        ),
+    ]

releng/models.py

@@ -11,6 +11,7 @@
 from django.utils.safestring import mark_safe
 
 from main.utils import set_created_field, parse_markdown
+from devel.fields import PGPKeyField
 
 
 class Release(models.Model):
@@ -19,6 +20,8 @@ class Release(models.Model):
     kernel_version = models.CharField(max_length=50, blank=True)
     md5_sum = models.CharField('MD5 digest', max_length=32, blank=True)
     sha1_sum = models.CharField('SHA1 digest', max_length=40, blank=True)
+    pgp_key = PGPKeyField(max_length=40, verbose_name="PGP key fingerprint",  null=True, blank=True,
+                          help_text="consists of 40 hex digits; use `gpg --fingerprint`")
     created = models.DateTimeField(editable=False)
     last_modified = models.DateTimeField(editable=False)
     available = models.BooleanField(default=True)

templates/public/download.html

@@ -2,6 +2,7 @@
 {% load cache %}
 {% load static %}
 {% load flags %}
+{% load pgp %}
 
 {% block title %}Arch Linux - Downloads{% endblock %}
 
@@ -98,6 +99,7 @@ <h4>Checksums</h4>
     <ul>
         <li><a href="https://www.archlinux.org/{{ release.iso_url }}.sig"
             title="PGP signature">PGP signature</a></li>
+        {% if release.pgp_key %}<li><strong>PGP fingerprint:</strong> {% pgp_key_link release.pgp_key %}</li>{% endif %}
         {% if release.md5_sum %}<li><strong>MD5:</strong> {{ release.md5_sum }}</li>{% endif %}
         {% if release.sha1_sum %}<li><strong>SHA1:</strong> {{ release.sha1_sum }}</li>{% endif %}
     </ul>

templates/releng/release_detail.html

@@ -1,5 +1,6 @@
 {% extends "base.html" %}
 {% load static %}
+{% load pgp %}
 
 {% block title %}Arch Linux - Release: {{ release.version }}{% endblock %}
 
@@ -21,6 +22,7 @@ <h2>{{ release.version }}</h2>
        {% endif %}
         {% if release.md5_sum %}<li><strong>MD5:</strong> {{ release.md5_sum }}</li>{% endif %}
         {% if release.sha1_sum %}<li><strong>SHA1:</strong> {{ release.sha1_sum }}</li>{% endif %}
+	{% if release.pgp_key %}<li><strong>PGP fingerprint:</strong> {% pgp_key_link release.pgp_key %}</li>{% endif %}
     </ul>
 
     {% if release.info %}