From 8312233a9393832d62d6638e1e6b516abbe33ff5 Mon Sep 17 00:00:00 2001
From: Geoff Bourne <itzgeoff@gmail.com>
Date: Sun, 7 Feb 2021 11:22:08 -0600
Subject: [PATCH] Added support for Purpur servers #746

---
 README.md           | 12 ++++++++++++
 start-configuration |  4 ++++
 start-deployPurpur  | 38 ++++++++++++++++++++++++++++++++++++++
 start-deployTuinity |  2 +-
 4 files changed, 55 insertions(+), 1 deletion(-)
 create mode 100755 start-deployPurpur

diff --git a/README.md b/README.md
index 0f0007af..90e36b26 100644
--- a/README.md
+++ b/README.md
@@ -487,6 +487,18 @@ A [Tuinity](https://github.com/Spottedleaf/Tuinity) server, which is a fork of P
 
 > **NOTE** only `VERSION=LATEST` is supported
 
+## Running a Purpur server
+
+A [Purpur](https://purpur.pl3x.net/) server, which is "a fork of Paper and Tuinity with the goal of providing new and interesting configuration options".
+
+    -e TYPE=PURPUR
+
+> NOTE: the `VERSION` variable is used to lookup a build of Purpur to download
+
+Extra variables:
+- `PURPUR_BUILD=LATEST` : set a specific Purpur build to use
+- `FORCE_REDOWNLOAD=false` : set to true to force the located server jar to be re-downloaded
+
 ## Running a Magma server
 
 A [Magma](https://magmafoundation.org/) server, which is a combination of Forge and PaperMC, can be used with
diff --git a/start-configuration b/start-configuration
index e4431321..1cb1a387 100644
--- a/start-configuration
+++ b/start-configuration
@@ -138,6 +138,10 @@ case "${TYPE^^}" in
     exec ${SCRIPTS:-/}start-deployCatserver "$@"
   ;;
 
+  PURPUR)
+    exec ${SCRIPTS:-/}start-deployPurpur "$@"
+  ;;
+
   *)
       log "Invalid type: '$TYPE'"
       log "Must be: VANILLA, FORGE, BUKKIT, SPIGOT, PAPER, FTBA (multiarch-only),"
diff --git a/start-deployPurpur b/start-deployPurpur
new file mode 100755
index 00000000..91a5fbf3
--- /dev/null
+++ b/start-deployPurpur
@@ -0,0 +1,38 @@
+#!/bin/bash
+set -euo pipefail
+IFS=$'\n\t'
+
+. ${SCRIPTS:-/}start-utils
+isDebugging && set -x
+
+: ${VANILLA_VERSION:?}
+: ${PURPUR_BUILD:=LATEST}
+: ${FORCE_REDOWNLOAD:=false}
+
+if [[ ${PURPUR_BUILD} == LATEST ]]; then
+  PURPUR_BUILD=$(curl -fsSL "https://purpur.pl3x.net/api/v1/purpur/${VANILLA_VERSION}" |
+    jq -r '.builds.latest' || echo "")
+  if [[ -z ${PURPUR_BUILD} ]]; then
+    log "ERROR: Failed to locate a Purpur build for ${VANILLA_VERSION}."
+    log "       Please check if a download is available at https://purpur.pl3x.net/downloads/"
+    exit 3
+  fi
+fi
+
+export SERVER="purpur-${VANILLA_VERSION}-${PURPUR_BUILD}.jar"
+
+if [ ! -f "$SERVER" ] || isTrue "$FORCE_REDOWNLOAD"; then
+    downloadUrl="https://purpur.pl3x.net/api/v1/purpur/${VANILLA_VERSION}/${PURPUR_BUILD}/download"
+    log "Downloading Purpur from $downloadUrl ..."
+    if ! curl -fsSL -o "$SERVER" "$downloadUrl"; then
+      log "ERROR: failed to download from $downloadUrl (status=$?)"
+      exit 3
+    fi
+fi
+
+# Normalize on Spigot for later operations
+export TYPE=SPIGOT
+export SKIP_LOG4J_CONFIG=true
+
+# Continue to Final Setup
+exec ${SCRIPTS:-/}start-finalSetupWorld $@
diff --git a/start-deployTuinity b/start-deployTuinity
index f2c6f039..d0343402 100644
--- a/start-deployTuinity
+++ b/start-deployTuinity
@@ -20,7 +20,7 @@ if [ ! -f "$SERVER" ] || [ -n "$FORCE_REDOWNLOAD" ]; then
     fi
 fi
 
-# Normalize on Spigot for operations below
+# Normalize on Spigot for later operations
 export TYPE=SPIGOT
 
 # Continue to Final Setup