Fix Dockerfile

Author: 5k4nd

docker-compose.yml

@@ -10,6 +10,7 @@ services:
       args:
         ES_VERSION: ${ES_VERSION}
         PLUGIN_VERSION: ${PLUGIN_VERSION}
+        PLUGIN_FILENAME: pathhierarchy-aggregation-${PLUGIN_VERSION}.zip
     environment:
       - discovery.type=single-node
       # NO DEBUG

docker/Dockerfile

@@ -1,7 +1,12 @@
 ARG ES_VERSION
-ARG PLUGIN_VERSION
+ARG PLUGIN_FILENAME
 
 FROM docker.elastic.co/elasticsearch/elasticsearch:${ES_VERSION} AS elasticsearch-plugin-debug
 
-COPY /build/distributions/pathhierarchy-aggregation-${PLUGIN_VERSION}.zip /tmp/pathhierarchy-aggregation-${PLUGIN_VERSION}.zip
-RUN ./bin/elasticsearch-plugin install file:/tmp/pathhierarchy-aggregation-${PLUGIN_VERSION}.zip
+COPY build/distributions/${PLUGIN_FILENAME} /tmp/${PLUGIN_FILENAME}
+
+# mandatory because docker ARG is scoped to stage (forgotten after the FROM scope above...!)
+ARG PLUGIN_FILENAME
+# madantory because ARGS cannot be used inside RUN shell
+ENV PLUGIN_FILENAME=${PLUGIN_FILENAME}
+RUN ./bin/elasticsearch-plugin install --batch file:/tmp/${PLUGIN_FILENAME}