Add source dir override for /plugins, /mods, and /config (#1957)

README.md

@@ -747,13 +747,13 @@ packwiz modpack defitions are processed before other mod definitions (`MODPACK`,
 There are optional volume paths that can be attached to supply content to be copied into the data area:
 
 `/plugins`
-: contents are synchronized into `/data/plugins` for Bukkit related server types. Set `SYNC_SKIP_NEWER_IN_DESTINATION=false` if you want files from `/plugins` to take precedence over newer files in `/data/plugins`.
+: contents are synchronized into `/data/plugins` for Bukkit related server types. The source can be changed by setting `COPY_PLUGINS_SRC`. The destination can be changed by setting `COPY_PLUGINS_DEST`. Set `SYNC_SKIP_NEWER_IN_DESTINATION=false` if you want files from `/plugins` to take precedence over newer files in `/data/plugins`.
 
 `/mods`
-: contents are synchronized into `/data/mods` for Fabric and Forge related server types. The destination can be changed by setting `COPY_MODS_DEST`.
+: contents are synchronized into `/data/mods` for Fabric and Forge related server types. The source can be changed by setting `COPY_MODS_SRC`. The destination can be changed by setting `COPY_MODS_DEST`.
 
 `/config`
-: contents are synchronized into `/data/config` by default, but can be changed with `COPY_CONFIG_DEST`. For example, `-v ./config:/config -e COPY_CONFIG_DEST=/data` will allow you to copy over files like `bukkit.yml` and so on directly into the server directory. Set `SYNC_SKIP_NEWER_IN_DESTINATION=false` if you want files from `/config` to take precedence over newer files in `/data/config`.
+: contents are synchronized into `/data/config` by default, but can be changed with `COPY_CONFIG_DEST`. The source can be changed by setting `COPY_CONFIG_SRC`. For example, `-v ./config:/config -e COPY_CONFIG_DEST=/data` will allow you to copy over files like `bukkit.yml` and so on directly into the server directory. Set `SYNC_SKIP_NEWER_IN_DESTINATION=false` if you want files from `/config` to take precedence over newer files in `/data/config`.
 
 By default, the [environment variable processing](#replacing-variables-inside-configs) is performed on synchronized files that match the expected suffixes in `REPLACE_ENV_SUFFIXES` (by default "yml,yaml,txt,cfg,conf,properties,hjson,json,tml,toml") and are not excluded by `REPLACE_ENV_VARIABLES_EXCLUDES` and `REPLACE_ENV_VARIABLES_EXCLUDE_PATHS`. This processing can be disabled by setting `REPLACE_ENV_DURING_SYNC` to `false`.
 

scripts/start-setupMounts

@@ -24,47 +24,52 @@ else
   subcommand=sync
 fi
 
-if [ -d /plugins ]; then
+: "${COPY_PLUGINS_SRC:="/plugins"}"
+: "${COPY_PLUGINS_DEST:="/data/plugins"}"
+
+if [ -d "${COPY_PLUGINS_SRC}" ]; then
   case ${FAMILY} in
     SPIGOT|HYBRID)
-      mkdir -p /data/plugins
-      log "Copying plugins over..."
+      mkdir -p "${COPY_PLUGINS_DEST}"
+      log "Copying any plugins from ${COPY_PLUGINS_SRC} to ${COPY_PLUGINS_DEST}"
       mc-image-helper \
         ${subcommand} $updateArg \
         --replace-env-file-suffixes="${REPLACE_ENV_SUFFIXES}" \
         --replace-env-excludes="${REPLACE_ENV_VARIABLES_EXCLUDES}" \
         --replace-env-exclude-paths="${REPLACE_ENV_VARIABLES_EXCLUDE_PATHS}" \
         --replace-env-prefix="${REPLACE_ENV_VARIABLE_PREFIX}" \
-        /plugins /data/plugins
+        "${COPY_PLUGINS_SRC}" "${COPY_PLUGINS_DEST}"
       ;;
   esac
 fi
 
 # If any modules have been provided, copy them over
+: "${COPY_MODS_SRC:="/mods"}"
 : "${COPY_MODS_DEST:="/data/mods"}"
 
-if [ -d /mods ]; then
-  log "Copying any mods over..."
+if [ -d "${COPY_MODS_SRC}" ]; then
+  log "Copying any mods from ${COPY_MODS_SRC} to ${COPY_MODS_DEST}"
   mc-image-helper \
     ${subcommand} $updateArg \
     --replace-env-file-suffixes="${REPLACE_ENV_SUFFIXES}" \
     --replace-env-excludes="${REPLACE_ENV_VARIABLES_EXCLUDES}" \
     --replace-env-exclude-paths="${REPLACE_ENV_VARIABLES_EXCLUDE_PATHS}" \
     --replace-env-prefix="${REPLACE_ENV_VARIABLE_PREFIX}" \
-    /mods "${COPY_MODS_DEST}"
+    "${COPY_MODS_SRC}" "${COPY_MODS_DEST}"
 fi
 
+: "${COPY_CONFIG_SRC:="/config"}"
 : "${COPY_CONFIG_DEST:="/data/config"}"
 
-if [ -d /config ]; then
-  log "Copying any configs from /config to ${COPY_CONFIG_DEST}"
+if [ -d "${COPY_CONFIG_SRC}" ]; then
+  log "Copying any configs from ${COPY_CONFIG_SRC} to ${COPY_CONFIG_DEST}"
   mc-image-helper \
     ${subcommand} $updateArg \
     --replace-env-file-suffixes="${REPLACE_ENV_SUFFIXES}" \
     --replace-env-excludes="${REPLACE_ENV_VARIABLES_EXCLUDES}" \
     --replace-env-exclude-paths="${REPLACE_ENV_VARIABLES_EXCLUDE_PATHS}" \
     --replace-env-prefix="${REPLACE_ENV_VARIABLE_PREFIX}" \
-    /config "${COPY_CONFIG_DEST}"
+    "${COPY_CONFIG_SRC}" "${COPY_CONFIG_DEST}"
 fi
 
 exec "${SCRIPTS:-/}start-setupServerProperties" "$@"

tests/setuponlytests/mounts-custom/custom/config/test.json

@@ -0,0 +1 @@
+{}

tests/setuponlytests/mounts-custom/docker-compose.yml

@@ -0,0 +1,21 @@
+version: "3"
+
+services:
+  mc:
+    image: ${IMAGE_TO_TEST:-itzg/minecraft-server}
+    environment:
+      EULA: "true"
+      SETUP_ONLY: "true"
+      TYPE: CUSTOM
+      CUSTOM_SERVER: /servers/fake.jar
+      VERSION: 1.18.1
+      COPY_PLUGINS_SRC: /custom/plugins
+      COPY_PLUGINS_DEST: /data/custom-plugins
+      COPY_MODS_SRC: /custom/mods
+      COPY_MODS_DEST: /data/custom-mods
+      COPY_CONFIG_SRC: /custom/config
+      COPY_CONFIG_DEST: /data/custom-config
+    volumes:
+      - ./data:/data
+      - ./custom:/custom
+      - ./fake.jar:/servers/fake.jar

tests/setuponlytests/mounts-custom/verify.sh

@@ -0,0 +1,3 @@
+mc-image-helper assert fileExists custom-plugins/plugin.jar
+mc-image-helper assert fileExists custom-mods/mod.jar
+mc-image-helper assert fileExists custom-config/test.json