upload/koji: make koji runner work with docker

The setup should be container engine agnostic. This changes allows this script
to be run on systems which prefer docker over podman (e.g. Github Actions).

internal/upload/koji/run-koji-container.sh

@@ -2,36 +2,45 @@
 set -eu
 
 if [ $UID != 0 ]; then
-  echo must be run as root
+  echo This script must be run as root.
   exit 1
 fi
 
+if which podman 2>/dev/null >&2; then
+  CONTAINER_RUNTIME=podman
+elif which docker 2>/dev/null >&2; then
+  CONTAINER_RUNTIME=docker
+else
+  echo No container runtime found, install podman or docker.
+  exit 2
+fi
+
 clean_up () {
     EXIT_CODE=$?
 
     echo "Shutting down containers, please wait..."
 
-    podman stop org.osbuild.koji.koji || true
-    podman rm org.osbuild.koji.koji || true
+    ${CONTAINER_RUNTIME} stop org.osbuild.koji.koji || true
+    ${CONTAINER_RUNTIME} rm org.osbuild.koji.koji || true
 
-    podman stop org.osbuild.koji.postgres || true
-    podman rm org.osbuild.koji.postgres || true
+    ${CONTAINER_RUNTIME} stop org.osbuild.koji.postgres || true
+    ${CONTAINER_RUNTIME} rm org.osbuild.koji.postgres || true
 
-    podman network rm -f org.osbuild.koji || true
+    ${CONTAINER_RUNTIME} network rm -f org.osbuild.koji || true
 
     exit $EXIT_CODE
 }
 
 trap clean_up EXIT
 
-podman network create org.osbuild.koji
-podman run -d --name org.osbuild.koji.postgres --network org.osbuild.koji \
+${CONTAINER_RUNTIME} network create org.osbuild.koji
+${CONTAINER_RUNTIME} run -d --name org.osbuild.koji.postgres --network org.osbuild.koji \
   -e POSTGRES_USER=koji \
   -e POSTGRES_PASSWORD=kojipass \
   -e POSTGRES_DB=koji \
   docker.io/library/postgres:12-alpine
 
-podman run -d --name org.osbuild.koji.koji --network org.osbuild.koji \
+${CONTAINER_RUNTIME} run -d --name org.osbuild.koji.koji --network org.osbuild.koji \
   -p 8080:80 \
   -e POSTGRES_USER=koji \
   -e POSTGRES_PASSWORD=kojipass \