r/dch-yum: Configure dch Yum repository

The *dch* repository, hosted on *file0.pyrocufflink.blue* and managed by
the *repohost* Ansible role, is where I plan to host RPM packages for
internal use (e.g. *sshca-cli*, *dch-selinux*, etc.).  The *dch-yum*
role configures Yum/dnf to use this repository.  Roles that need to
install a package from here will list this role as a dependency.

roles/dch-yum/files/dch.repo

@@ -0,0 +1,6 @@
+[dch]
+name=DCH - Fedora $releasever
+baseurl=https://files.pyrocufflink.blue/yum/dch/fedora/$releasever
+gpgkey=https://files.pyrocufflink.blue/yum/dch/gnupg.pub
+gpgcheck=1
+skip_if_unavailable=true

roles/dch-yum/tasks/main.yml

@@ -0,0 +1,9 @@
+- name: ensure dch yum repository is configured
+  copy:
+    src: dch.repo
+    dest: /etc/yum.repos.d/dch.repo
+    owner: root
+    group: root
+    mode: u=rw,go=r
+  tags:
+  - repo