From ee7f2ee73962dac1006ae7f6c466e9c0d4ced51f Mon Sep 17 00:00:00 2001
From: Marijn <marijnvanwezel@gmail.com>
Date: Sun, 17 Oct 2021 21:43:41 +0200
Subject: [PATCH] Add option to specify specific Fabric loader version (#1073)

---
 README.md          |  7 +++++++
 start-deployFabric | 10 +++++++++-
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 4bf2e2c6..38aaafd1 100644
--- a/README.md
+++ b/README.md
@@ -549,6 +549,13 @@ docker run -d -v /path/on/host:/data ... \
     -e FABRIC_INSTALLER_URL=http://HOST/fabric-installer-0.5.0.32.jar ...
 ```
 
+A specific loader version can be requested using `FABRIC_LOADER_VERSION`, such as:
+
+```
+docker run -d -v /path/on/host:/data ... \
+    -e FABRIC_LOADER_VERSION=0.11.7
+```
+
 In order to add mods, you have two options:
 
 ### Running a Limbo server
diff --git a/start-deployFabric b/start-deployFabric
index 5fce8d46..4f0a0d79 100755
--- a/start-deployFabric
+++ b/start-deployFabric
@@ -14,6 +14,7 @@ if [[ ! -e ${SERVER} ]]; then
 
   : ${FABRIC_INSTALLER:=}
   : ${FABRIC_INSTALLER_URL:=}
+  : ${FABRIC_LOADER_VERSION:=LATEST}
   : ${FABRIC_INSTALLER_VERSION:=${FABRICVERSION:-LATEST}}
 
   if [[ -z $FABRIC_INSTALLER && -z $FABRIC_INSTALLER_URL ]]; then
@@ -31,6 +32,12 @@ if [[ ! -e ${SERVER} ]]; then
     exit 2
   fi
 
+  if [[ -z $FABRIC_LOADER_VERSION || ${FABRIC_LOADER_VERSION^^} = LATEST ]]; then
+    log "Checking Fabric Loader version information."
+
+    FABRIC_LOADER_VERSION=$(maven-metadata-release https://maven.fabricmc.net/net/fabricmc/fabric-loader/maven-metadata.xml)
+  fi
+
   if [[ ! -e $FABRIC_INSTALLER ]]; then
     log "Downloading $FABRIC_INSTALLER_URL ..."
     if ! get -o "$FABRIC_INSTALLER" "$FABRIC_INSTALLER_URL"; then
@@ -39,13 +46,14 @@ if [[ ! -e ${SERVER} ]]; then
     fi
   fi
 
-  log "Installing Fabric ${VANILLA_VERSION} using $FABRIC_INSTALLER"
+  log "Installing Fabric ${VANILLA_VERSION} using $FABRIC_INSTALLER with loader version $FABRIC_LOADER_VERSION"
 
   tries=3
   set +e
   while ((--tries >= 0)); do
     java -jar $FABRIC_INSTALLER server \
       -mcversion $VANILLA_VERSION \
+      -loader $FABRIC_LOADER_VERSION \
       -downloadMinecraft \
       -dir /data
     if [[ $? == 0 ]]; then