feat(docker): add support for additional files in Dockerfile

Explanatory body:
This commit extends the Dockerfile and related scripts to support the inclusion of additional files during image build. The Dockerfile now accepts an `ADDITIONAL_FILES` argument, which can be passed during the build process. These additional files are copied into the container at specified paths. The changes also include updates to the `docker-compose.yaml` file and related scripts to handle the new `ADDITIONAL_FILES` argument appropriately during composition and execution.

.util/.mod_env.json.tmpl

@@ -9,5 +9,7 @@
     ],
     "minetest_add_conf": "",
     "client_nb": 1,
-    "additional_mods": ""
+    "additional_mods": "",
+    "additional_files": [
+    ]
 }

.util/Dockerfile

@@ -1,6 +1,7 @@
 # 
 FROM ghcr.io/minetest/minetest:latest as builder
 ARG DEPENDENCIES
+ARG ADDITIONAL_FILES=""
 ARG MINETEST_ADD_CONF=""
 
 ENV STOP_SERVER=true
@@ -27,6 +28,24 @@ while read dep; do
 done < <(echo "$DEPENDENCIES" | jq -c '.[]')
 EOF
 
+RUN <<EOF
+echo "ADDITIONAL_FILES"
+while read file_def; do
+    content_type=$(echo "$file_def" | jq -r ".content|type")
+    if [ "$content_type" = "object" ]; then
+        content=$(echo "$file_def" | jq -r ".content")
+    else
+        content=$(echo "$file_def" | jq -c ".content")
+    fi
+    dep_path=$(echo "$file_def" | jq -r ".path")
+    if ! [ -z "$dep_path" ]; then
+        echo "Creating file $dep_path"
+        mkdir -p $(dirname "$dep_path")
+        echo "$content" > "$dep_path"
+    fi
+done < <(echo "$ADDITIONAL_FILES" | jq -c '.[]')
+EOF
+
 COPY <<"EOF" /usr/local/sbin/run_minetest
 #!/usr/bin/env bash
 

.util/docker-compose.yaml

@@ -6,7 +6,8 @@ services:
       dockerfile: Dockerfile
       args:
         DEPENDENCIES: "${DEPENDENCIES}"
-        MINETEST_ADD_CONF: "${MINETEST_ADD_CONF:-}"
+        MINETEST_ADD_CONF: "${MINETEST_ADD_CONF}"
+        ADDITIONAL_FILES: "${ADDITIONAL_FILES}"
     ports:
       - "30000:30000/udp"
     volumes:

.util/run_tests.sh

@@ -215,23 +215,25 @@ export STOP_SERVER="${stop_server:-true}"
 export FAILFAST="${failfast:-false}"
 export DEPENDENCIES="${dependencies}"
 export CLIENT_IMAGE="${client_image:-registry.apps.education.fr/iri/minetest/docker_test_harness/client:latest}"
-if ($docker_cmd manifest inspect $CLIENT_IMAGE 2>&1 /dev/null); then
+if ! $docker_cmd manifest inspect $CLIENT_IMAGE > /dev/null 2>&1 ; then
   die "CLIENT IMAGE $CLIENT_IMAGE does not exists"
 fi
-export ENV_FILE=""
+
 export CURRENT_MOD=""
 export ADDITIONAL_MODS=""
+export ADDITIONAL_FILES=""
 if [ -f "$PWD/.mod_env.json" ]; then
   DEPENDENCIES="$(cat "$PWD/.mod_env.json" | jq -c ".dependencies//\"\"")"
   CURRENT_MOD="$(cat "$PWD/.mod_env.json" | jq -r ".current_mod//\"\"")"
-  CLIENT_NB="$(cat "$PWD/.mod_env.json" | jq -r ".client_nb//0")"
+  CLIENT_NB="$(cat "$PWD/.mod_env.json" | jq -r ".client_nb//$client_nb")"
   ADDITIONAL_MODS="$(cat "$PWD/.mod_env.json" | jq -r ".additional_mods//\"\"")"
+  ADDITIONAL_FILES="$(cat "$PWD/.mod_env.json" | jq -c ".additional_files//[]")"
 fi
 
 docker_compose_file=`mktemp --suffix=.yaml docker-composeXXXXXX --tmpdir=.util`
 
 cat "${script_dir}/docker-compose.yaml" > "$PWD/$docker_compose_file"
-for (( clienti=1; clienti<=$client_nb; clienti++ )); do
+for (( clienti=1; clienti<=$CLIENT_NB; clienti++ )); do
   cat <<EOF >> "$PWD/$docker_compose_file"
   client${clienti}:
     image: \${CLIENT_IMAGE}
@@ -254,10 +256,10 @@ if [ "$debug" = "true" ]; then
   echo -e "$GREEN--------------------------------------------------------------------------$NOFORMAT"
 fi
 
-eval $docker_cmd compose $ENV_FILE -f "$PWD/${docker_compose_file}" down
-eval $docker_cmd compose $ENV_FILE -f "$PWD/${docker_compose_file}" pull
-eval $docker_cmd compose $ENV_FILE -f "$PWD/${docker_compose_file}" build --pull
-eval $docker_cmd compose $ENV_FILE -f "$PWD/${docker_compose_file}" up --force-recreate --exit-code-from server --abort-on-container-exit
+eval $docker_cmd compose -f "$PWD/${docker_compose_file}" down
+eval $docker_cmd compose -f "$PWD/${docker_compose_file}" pull
+eval $docker_cmd compose -f "$PWD/${docker_compose_file}" build --pull
+eval $docker_cmd compose -f "$PWD/${docker_compose_file}" up --force-recreate --exit-code-from server --abort-on-container-exit
 exit_code=$?
 
 exit $exit_code