ci: Update mkosi action to latest commit

Let's make sure we're testing with the latest changes in mkosi. This
includes both the switch to systemd-repart and ukify, making sure we
get extra testing coverage for those components.

This also drops options from the centos config that have been removed
in the newer mkosi.

For some reason idmapping runs into some issues so we disable it for
now.

.github/workflows/mkosi.yml

@@ -72,24 +72,14 @@ jobs:
             release: rawhide
           - distro: opensuse
             release: tumbleweed
-          - distro: centos_epel
+          - distro: centos
             release: 9-stream
-          - distro: centos_epel
+          - distro: centos
             release: 8-stream
 
     steps:
     - uses: actions/checkout@755da8c3cf115ac066823e79a1e1788f8940201b
-    - uses: systemd/mkosi@c9772ec920f1cd03181ba14e6fe2c3d35ccb4f92
-
-    # FIXME: temporary workaround for a file conflict between systemd (C9S) and
-    # systemd-boot (EPEL9). Drop this once systemd in C9S is updated to v252
-    # (should be done by the end of 2022).
-    - name: Fix C9S/EPEL9
-      if: ${{ matrix.release == '9-stream' }}
-      run: sudo sed -i '/add_packages/s/systemd-boot/systemd/g' /usr/local/lib/python3.10/dist-packages/mkosi/__init__.py
-
-    - name: Install
-      run: sudo apt-get update && sudo apt-get install --no-install-recommends python3-pexpect python3-jinja2
+    - uses: systemd/mkosi@ab2aff830096e681da1950a7d29f277caa89516c
 
     - name: Configure
       run: |
@@ -106,7 +96,7 @@ jobs:
         EOF
 
     - name: Build ${{ matrix.distro }}
-      run: sudo mkosi build
+      run: sudo mkosi --idmap no
 
     - name: Show ${{ matrix.distro }} image summary
       run: sudo mkosi summary

mkosi.conf.d/centos/10-mkosi.centos

@@ -4,11 +4,8 @@
 # Symlink this file to mkosi.default in the project root directory and invoke "mkosi" to build an OS image.
 
 [Distribution]
-Distribution=centos_epel
-
-[Output]
-Format=gpt_xfs
-HostonlyInitrd=no
+Distribution=centos
+Repositories=epel
 
 [Content]
 Packages=