run-builder: support background execution

The run-builder script now takes a command line argument, which is
either
  start - run the container in the background
  stop  - stop the running container
  fg    - run the container in the foreground (old behavior)

This should prove useful in CI.

run-builder.sh

@@ -19,13 +19,32 @@ else
   exit 2
 fi
 
-GATEWAY_IP=$(podman network inspect org.osbuild.koji --format '{{ (index (index (index .plugins 0).ipam.ranges 0) 0).gateway }}')
-echo "Gateway IP is $GATEWAY_IP"
+builder_start() {
+  GATEWAY_IP=$(podman network inspect org.osbuild.koji --format '{{ (index (index (index .plugins 0).ipam.ranges 0) 0).gateway }}')
+  echo "Gateway IP is $GATEWAY_IP"
 
-${CONTAINER_RUNTIME} run --rm -i -t --name org.osbuild.koji.builder --network org.osbuild.koji \
-  -v "${SHARE_DIR}:/share:z" \
-  -v "${DATA_DIR}:/mnt:z" \
-  -v "${PWD}/container/builder/osbuild-koji.conf:/etc/koji-osbuild/builder.conf:z" \
-  --hostname org.osbuild.koji.kojid \
-  --add-host=composer:${GATEWAY_IP} \
-  koji.builder
+  ${CONTAINER_RUNTIME} run --rm ${CONTAINER_FLAGS} \
+    --name org.osbuild.koji.builder --network org.osbuild.koji \
+    -v "${SHARE_DIR}:/share:z" \
+    -v "${DATA_DIR}:/mnt:z" \
+    -v "${PWD}/container/builder/osbuild-koji.conf:/etc/koji-osbuild/builder.conf:z" \
+    --hostname org.osbuild.koji.kojid \
+    --add-host=composer:${GATEWAY_IP} \
+    koji.builder
+}
+
+builder_stop() {
+  ${CONTAINER_RUNTIME} stop org.osbuild.koji.builder || true
+}
+
+# default to running in the background
+CONTAINER_FLAGS=-d
+
+if [ $1 == "start" ]; then
+  builder_start
+elif [ $1 == "fg" ]; then
+  CONTAINER_FLAGS=-it
+  builder_start
+elif [ $1 == "stop" ]; then
+  builder_stop
+fi