Speed up server testing by keeping the containers around

This allows re-using containers, saving a tremendous amount of time.

The drawback here is that any environment change (on the docker /
podman containers side) is not detected. The way to deal with this
will be to create a process around major releases where I delete all
the containers and re-test from scratch.

Relates to: vedang#130

server/test/Makefile

@@ -7,12 +7,14 @@ DOCKER_OS = $(patsubst %.Dockerfile.in, %, \
 		$(notdir $(wildcard docker/templates/*.Dockerfile.in)))
 
 # Arguments to pass to docker build .
-DOCKER_BUILD_ARGS = -q
+DOCKER_BUILD_ARGS = -q -t
 
 # Advice make not to delete these "intermediate" files.
-.PRECIOUS: docker/%.Dockerfile docker/.%.build
+.PRECIOUS: docker/%.Dockerfile docker/.%.build docker/.%.container
 
-.PHONY: all test check docker/build
+# Avoid conflicts with real files
+SUBDIRS = docker
+.PHONY: subdirs $(SUBDIRS)
 
 all: docker/test
 test: docker/test
@@ -24,16 +26,22 @@ docker/%.Dockerfile: docker/templates/%.Dockerfile.in \
 	@echo Creating Dockerfile for target $*
 	cat $^ > $@
 
-# Build the Dockerfile
+# Build the Docker Image
 docker/.%.build: docker/%.Dockerfile ../autobuild docker/lib
-	@echo Building target $*
-	podman image build $(DOCKER_BUILD_ARGS) -t epdfinfo/$* -f $< ../ || exit 0
+	@echo Building target image $*
+	podman image build $(DOCKER_BUILD_ARGS) epdfinfo/$* -f $< ../
 	touch $@
 
-# Run the Dockerfile
-docker/%: docker/.%.build
+# Build the Docker Container
+docker/.%.container: docker/.%.build
+	@echo Building target container $*
+	podman container create $(DOCKER_BUILD_ARGS) --name epdfinfo-$* epdfinfo/$*
+	touch $@
+
+# Run the Containers generated by the dockerfile
+docker/%: docker/.%.container
 	@echo Running tests on target $*
-	podman container run --rm --name epdfinfo-$* epdfinfo/$*
+	podman container start -a epdfinfo-$*
 
 # Run all Dockerfiles
 docker/test: docker/build $(patsubst %, docker/%, $(DOCKER_OS))
@@ -49,6 +57,7 @@ docker/clean: $(patsubst %, docker/.%.clean, $(DOCKER_OS))
 
 clean: docker/clean
 	rm -f -- docker/.[^.]*.build
+	rm -f -- docker/.[^.]*.container
 	rm -f -- docker/*.Dockerfile
 
 print:

server/test/docker/.gitignore

@@ -1,2 +1,3 @@
 *.Dockerfile
 *.build
+*.container