Download and use packwiz from Maven repository (#1725)

Also
* Added github actions debug support
* added use of fileNotExists

tests/setuponlytests/conflicting_world_for_spigot_server/verify.sh

@@ -1,5 +1,7 @@
-mc-image-helper assert fileExists world/level.dat && \
-mc-image-helper assert fileExists world_nether/DIM-1/some_spigot_nether_file && \
-mc-image-helper assert fileExists world_the_end/DIM1/some_spigot_end_file && \
-! mc-image-helper assert fileExists world_nether/DIM-1/some_vanilla_nether_file && \
-! mc-image-helper assert fileExists world_the_end/DIM1/some_vanilla_end_file
+mc-image-helper assert fileExists \
+  world/level.dat \
+  world_nether/DIM-1/some_spigot_nether_file \
+  world_the_end/DIM1/some_spigot_end_file
+mc-image-helper assert fileNotExists \
+  world_nether/DIM-1/some_vanilla_nether_file \
+  world_the_end/DIM1/some_vanilla_end_file

tests/setuponlytests/packwiz/docker-compose.yml

@@ -11,11 +11,11 @@ services:
     image: ${IMAGE_TO_TEST:-itzg/minecraft-server}
     environment:
       EULA: "true"
-      SETUP_ONLY: "true"
       PACKWIZ_URL: http://web/pack.toml
       TYPE: CUSTOM
       CUSTOM_SERVER: /servers/fake.jar
       VERSION: 1.19
+      DEBUG_HELPER: "true"
     volumes:
       - ./data:/data
       - ./fake.jar:/servers/fake.jar

tests/setuponlytests/test.sh

@@ -39,8 +39,10 @@ setupOnlyMinecraftTest(){
     fi
   fi
 
+  # false positive since it's used in delta calculations below
+  # shellcheck disable=SC2034
   start=$(date +%s)
-  if ! logs=$(docker compose run mc 2>&1); then
+  if ! logs=$(docker compose run --rm -e SETUP_ONLY=true -e DEBUG="${DEBUG:-false}" mc 2>&1); then
     outputContainerLog "$logs"
     result=1
   elif [ -f verify.sh ]; then