Feat: Disabling Mods in Generic Packs (#3281)

Author: azunaVT

docs/mods-and-plugins/index.md

@@ -78,6 +78,20 @@ If applying large generic packs, the update can be time-consuming. To skip the u
 
 The most time-consuming portion of the generic pack update is generating and comparing the SHA1 checksum. To skip the checksum generation, set `SKIP_GENERIC_PACK_CHECKSUM` to "true".
 
+To disable specific mods, which can be useful for conflicts between multiple generic packs, you can use the `GENERIC_PACKS_DISABLE_MODS` variable to specify mods to disable.
+
+Disabling mods with docker run:
+```shell
+docker run -d -e GENERIC_PACKS_DISABLE_MODS="mod1.jar mod2.jar" ...
+```
+
+Disabling mods within docker compose files:
+```yaml
+      GENERIC_PACKS_DISABLE_MODS: |
+        mod1.jar
+        mod2.jar
+```
+
 ## Mods/plugins list
 
 You may also download or copy over individual mods/plugins using the `MODS` or `PLUGINS` environment variables. Both are a comma or newline delimited list of

scripts/start-setupModpack

@@ -155,6 +155,7 @@ function handleGenericPacks() {
   : "${GENERIC_PACKS:=${GENERIC_PACK}}"
   : "${GENERIC_PACKS_PREFIX:=}"
   : "${GENERIC_PACKS_SUFFIX:=}"
+  : "${GENERIC_PACKS_DISABLE_MODS:=}"
 
   if [[ "${GENERIC_PACKS}" ]]; then
     IFS=',' read -ra packs <<< "${GENERIC_PACKS}"
@@ -192,6 +193,12 @@ function handleGenericPacks() {
         extract "${pack}" "${base_dir}"
       done
 
+      # Disable mods
+      for mod in ${GENERIC_PACKS_DISABLE_MODS}; do
+        log Disabling $mod
+        find "${base_dir}" -name "$mod" -exec mv {} {}.disabled -v \;
+      done
+
       # Remove any eula file since container manages it
       rm -f "${base_dir}/eula.txt"