Add testserver command - quickly start a test server

This will help encourage testing with some widely used plugins
to help identify issues caused by changes before they are pushed.

.gitignore

@@ -32,6 +32,7 @@ work/Spigot
 work/Spigot-Server
 work/Spigot-API
 work/*.jar
+work/test-server
 
 # Mac filesystem dust
 .DS_Store/

paper

@@ -24,15 +24,7 @@ done
 SOURCE=$([[ "$SOURCE" = /* ]] && echo "$SOURCE" || echo "$PWD/${SOURCE#./}")
 basedir=$(dirname "$SOURCE")
 
-paperstash() {
-    STASHED=$(git stash)
-}
-
-paperunstash() {
-    if [[ "$STASHED" != "No local changes to save" ]] ; then
-        git stash pop
-    fi
-}
+. $basedir/scripts/functions.sh
 
 case "$1" in
     "rb" | "rbp" | "rebuild")
@@ -72,6 +64,16 @@ case "$1" in
         scripts/makemcdevsrc.sh "$basedir"
     )
     ;;
+    "t" | "test" | "testserver")
+    (
+        cd "$basedir"
+        shift
+        scripts/testServer.sh "$basedir" "$@"
+    )
+    ;;
+    "td" | "testdir")
+        cd "${PAPER_TEST_DIR:-$basedir/work/test-server}"
+    ;;
     "r" | "root")
         cd "$basedir"
     ;;
@@ -169,5 +171,7 @@ esac
 unset RCPATH
 unset SOURCE
 unset basedir
+unset -f color
+unset -f colorend
 unset -f paperstash
 unset -f paperunstash

scripts/functions.sh

@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+
+color() {
+    if [ $2 ]; then
+            echo -e "\e[$1;$2m"
+    else
+            echo -e "\e[$1m"
+    fi
+}
+colorend() {
+    echo -e "\e[m"
+}
+
+paperstash() {
+    STASHED=$(git stash  2>/dev/null|| return 0) # errors are ok
+}
+
+paperunstash() {
+    if [[ "$STASHED" != "No local changes to save" ]] ; then
+        git stash pop 2>/dev/null|| return 0 # errors are ok
+    fi
+}

scripts/testServer.sh

@@ -0,0 +1,109 @@
+#!/bin/bash
+set -e
+PS1="$"
+basedir="$(cd "$1" && pwd -P)"
+workdir="$basedir/work"
+minecraftversion=$(cat "$workdir/BuildData/info.json"  | grep minecraftVersion | cut -d '"' -f 4)
+decompiledir="$workdir/$minecraftversion"
+
+
+#
+# FUNCTIONS
+#
+. $basedir/scripts/functions.sh
+
+updateTest() {
+    paperstash
+    git reset --hard origin/master
+    paperunstash
+}
+
+papertestdir="${PAPER_TEST_DIR:-$workdir/test-server}"
+
+mkdir -p "$papertestdir"
+cd "$papertestdir"
+
+#
+# SKELETON CHECK
+#
+
+if [ ! -d .git ]; then
+    git init
+    git remote add origin ${PAPER_TEST_SKELETON:-https://github.com/PaperMC/PaperTestServer}
+    git fetch origin
+    updateTest
+elif [ "$2" == "update" ] || [ "$3" == "update" ]; then
+    updateTest
+fi
+
+if [ ! -f server.properties ] || [ ! -d plugins ]; then
+    echo " "
+    echo " Checking out Test Server Skeleton"
+    updateTest
+fi
+
+
+#
+# EULA CHECK
+#
+
+if [ -z "$(grep true eula.txt 2>/dev/null)" ]; then
+    echo
+    echo "$(color 32)  It appears you have not agreed to Mojangs EULA yet! Press $(color 1 33)y$(colorend) $(color 32)to confirm agreement to"
+    read -p "  Mojangs EULA found at:$(color 1 32) https://account.mojang.com/documents/minecraft_eula $(colorend) " -n 1 -r
+    echo ""
+    if [[ ! $REPLY =~ ^[Yy]$ ]]; then
+        echo "$(color 1 31)Aborted$(colorend)"
+        exit;
+    fi
+    echo "eula=true" > eula.txt
+fi
+
+#
+# JAR CHECK
+#
+
+jar="$basedir/Paper-Server/target/paper-${minecraftversion}.jar"
+if [ ! -f "$jar" ] || [ "$2" == "build" ] || [ "$3" == "build" ]; then
+(
+    echo "Building Paper"
+    cd "$basedir"
+    ./paper patch
+    mvn clean install
+)
+fi
+
+
+#
+# JVM FLAGS
+#
+
+baseargs="-server -Xmx${PAPER_TEST_MEMORY:-2G} -Dfile.encoding=UTF-8 -XX:MaxGCPauseMillis=50 -XX:+UseG1GC"
+baseargs="$baseargs -XX:+UnlockExperimentalVMOptions -XX:G1NewSizePercent=30 -XX:G1MaxNewSizePercent=70 "
+
+cmd="java ${PAPER_TEST_BASE_JVM_ARGS:-$baseargs} ${PAPER_TEST_EXTRA_JVM_ARGS} -jar $jar"
+
+#
+# MULTIPLEXER CHOICE
+#
+
+multiplex=${PAPER_TEST_MULTIPLEXER:-screen}
+if [ "$multiplex" == "tmux" ]; then
+    echo "tmux is currently not supported. Please submit a PR to add tmux support if you need it.";
+    multiplex="screen"
+fi
+
+if [ "$multiplex" == "tmux" ] && [ ! -z "$(which tmux)" ]; then
+    echo "tmux not supported"
+elif [ ! -z "$(which screen)" ]; then # default screen last as final fallback
+    cmd="screen -DURS papertest $cmd"
+else
+    echo "Screen not found - It is strongly recommended to install screen"
+    sleep 3
+fi
+
+#
+# START / LOG
+#
+
+$cmd 2>&1 | tee -a ${PAPER_TEST_OUTPUT_LOG:-logs/output.log}