Initial commit

This commit is contained in:
Roman Zhuravlev 2025-04-23 23:16:55 +05:00
commit 358c67cc6b
5 changed files with 305 additions and 0 deletions

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.gitignore vendored Normal file
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.idea/

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Makefile Normal file
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PREFIX ?= /usr
all:
@echo Run \'make install\' to install MCA
install:
@install -m 0755 mca.sh -D $(DESTDIR)$(PREFIX)/bin/mca
@install -m 0644 screenrc -Dt $(DESTDIR)/etc/mca
uninstall:
@rm -rf $(DESTDIR)/etc/mca
@rm -f $(DESTDIR)$(PREFIX)/bin/mca

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README.md Normal file
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# Minecraft server launcher - utility
MCA is easy-to-use and allows you to run a Minecraft server with
just one short command in the background with the ability to
view the output with GNU Screen and run commands.
## Usage
```bash
mca [-fdx] [MCA_NAME|MCA_JAR|MCA_DIR] [--] [INPUT]…
```
## MCA examples
### Running `minecraft` server with 2048 megabytes max memory
```bash
mkdir ~/mca/myserver
cd ~/mca/myserver
# This link is taken from https://www.minecraft.net/en-us/download/server
wget https://piston-data.mojang.com/v1/objects/e6ec2f64e6080b9b5d9b471b291c33cc7f509733/server.jar
echo 'MAX_MEMORY=2048M' >> ./.mcarc
mca
```
### Running `paper` server with Aikar flags
```bash
echo 'PLATFORM=paper' >> ./.mcarc
mca
```
### Running `velocity` server with Aikar flags
```bash
echo 'PLATFORM=velocity' >> ./.mcarc
mca
```
Also, the platform can be determined automatically based on the `.jar` name. For example, the file name is `paper-1.21.5.jar`, since it starts with `paper`, the platform will be `paper` and there is no need to manually specify it in the `PLATFORM` variable.
## Installation
### From Zhira Debian repository
Debian 12 Bookworm has deb packages in the Zhira Debian repository.
#### Add the Zhira Debian repository:
```bash
wget -qO- https://deb.zhira.net/debian/zhira.gpg | gpg --dearmor | sudo tee /etc/apt/trusted.gpg.d/zhira.gpg > /dev/null
echo 'deb [arch=all] https://deb.zhira.net/debian/ bookworm main' | sudo tee /etc/apt/sources.list.d/zhira.list > /dev/null
```
#### Update the package list
```bash
sudo apt update
```
#### Install `mca`
```bash
sudo apt install mca
```
### From sources
#### Clone the repository
```bash
git clone https://git.zhira.net/rozhur/mca
```
### Install `mca` into `/usr/local/bin` directory
```bash
cd ./mca
sudo make PREFIX=/usr/local install
```

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mca.sh Executable file
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#!/bin/sh
set -e
EXEC_NAME="$(basename -- "$0")"
options="$(getopt -n "$EXEC_NAME" -s sh -o hvfdx -l help -l version -- "$@")"
eval set -- "$options"
SCREEN_OPTS=
while :; do
case "$1" in
-h|--help)
echo "Usage: $EXEC_NAME [-fdx] [MCA_NAME|MCA_JAR|MCA_DIR] [--] [INPUT]…"
exit
;;
-v|--version)
echo "MCA 1.0.0"
exit
;;
-f)
SCREEN_OPTS=Dm
;;
-d)
SCREEN_OPTS=d
;;
-x)
SCREEN_OPTS=x
;;
--)
shift
break
esac
shift
done
MCA_NAME=$1
if [ -z "$MCA_NAME" ]; then
MCA_DIR="$PWD"
MCA_NAME="$(basename -- "$MCA_DIR")"
elif echo "$MCA_NAME" | grep -qE '^\.{,2}/' && MCA_NAME="$(readlink -f -- "$MCA_NAME")"; then
if [ -d "$MCA_NAME" ]; then
MCA_DIR="$MCA_NAME"
MCA_NAME="$(basename -- "$MCA_DIR")"
else
MCA_DIR="$(dirname -- "$MCA_NAME")" MCA_JAR="$MCA_NAME"
MCA_NAME="$(basename -- "$MCA_DIR")"
fi
else
MCA_DIR="$HOME/mca/$MCA_NAME"
fi
command -v screen > /dev/null || { echo "$EXEC_NAME: screen not found" >&2; exit 2; }
if [ -n "$2" ]; then
shift
INPUT="$(echo "$*" | sed 's/"/\\\0/g')"
screen -S "$MCA_NAME" -X eval "stuff \"$INPUT\"\\015" > /dev/null || {
echo "$EXEC_NAME: no screen found" >&2
exit 2
}
exit
fi
MCA_SCREENRC_FILE="/etc/mca/screenrc"
[ -r "$MCA_SCREENRC_FILE" ] || { echo "$EXEC_NAME: can't read $MCA_SCREENRC_FILE" >&2; exit 2; }
if screen -c "$MCA_SCREENRC_FILE" "-$SCREEN_OPTS"rS "$MCA_NAME" > /dev/null 2>&1; then
exit
elif screen -S "$MCA_NAME" -X select . > /dev/null 2>&1; then
echo "$EXEC_NAME: this screen has already been attached to someone" >&2
exit 2
fi
[ -d "$MCA_DIR" ] || { echo "$EXEC_NAME: $MCA_DIR: not found" >&2; exit 2; }
cd "$MCA_DIR"
MCA_RC_FILE="$MCA_DIR/.mcarc"
# this file is taken from a dynamic variable, so we cannot specify an explicit path to the file
# shellcheck disable=SC1090
# `--` is supported in dash
# shellcheck disable=SC2240
[ -e "$MCA_RC_FILE" ] && . -- "$MCA_RC_FILE"
if [ -z "$PLATFORM" ]; then
if [ -z "$MCA_JAR" ]; then
MCA_JAR="$(find "$MCA_DIR" -maxdepth 1 -type f -name \*.jar | head -1)"
[ -z "$MCA_JAR" ] && {
echo "$EXEC_NAME: no jar found in $MCA_DIR" >&2
exit 2
}
fi
if [ -e "$MCA_JAR" ]; then
PLATFORM="$(basename -- "$MCA_JAR")"
PLATFORM="$(echo "$PLATFORM" | tr '[:upper:]' '[:lower:]' | grep -oE '[a-z]+' | head -1)"
else
echo "$EXEC_NAME: $MCA_JAR: no such file" >&2
exit 2
fi
else
[ -z "$MCA_JAR" ] && MCA_JAR="$MCA_DIR/$PLATFORM.jar"
[ ! -e "$MCA_JAR" ] && {
echo "$EXEC_NAME: $MCA_JAR: no such file" >&2
exit 2
}
fi
[ -n "$JVM_FLAGS" ] && JVM_FLAGS="$JVM_FLAGS "
JVM_FLAGS="$JVM_FLAGS-Dfile.encoding=UTF-8 -Djava.awt.headless=true"
case "$PLATFORM" in
bungee)
;;
waterfall|velocity)
[ "$PLATFORM" = "bungee" ] || JVM_FLAGS="$JVM_FLAGS -XX:+UseG1GC \
-XX:G1HeapRegionSize=4M \
-XX:+UnlockExperimentalVMOptions \
-XX:+ParallelRefProcEnabled \
-XX:+AlwaysPreTouch \
-DIReallyKnowWhatIAmDoingISwear=true"
;;
minecraft|bukkit|craftbukkit|spigot|paper)
JVM_FLAGS="$JVM_FLAGS -Dcom.mojang.eula.agree=true \
-DIReallyKnowWhatIAmDoingISwear=true"
[ "$PLATFORM" = "paper" ] && JVM_FLAGS="$JVM_FLAGS -XX:+UseG1GC \
-XX:+ParallelRefProcEnabled \
-XX:MaxGCPauseMillis=200 \
-XX:+UnlockExperimentalVMOptions \
-XX:+DisableExplicitGC \
-XX:+AlwaysPreTouch \
-XX:G1NewSizePercent=30 \
-XX:G1MaxNewSizePercent=40 \
-XX:G1HeapRegionSize=8M \
-XX:G1ReservePercent=20 \
-XX:G1HeapWastePercent=5 \
-XX:G1MixedGCCountTarget=4 \
-XX:InitiatingHeapOccupancyPercent=15 \
-XX:G1MixedGCLiveThresholdPercent=90 \
-XX:G1RSetUpdatingPauseTimePercent=5 \
-XX:SurvivorRatio=32 \
-XX:+PerfDisableSharedMem \
-XX:MaxTenuringThreshold=1 \
-Dusing.aikars.flags=https://mcflags.emc.gs \
-Daikars.new.flags=true"
;;
custom)
;;
*)
echo "$EXEC_NAME: invalid platform: $PLATFORM. Valid: \
bungee, waterfall, velocity, minecraft, bukkit, craftbukkit, spigot, paper, custom" >&2
exit 2
;;
esac
[ -n "$JAVA_HOME" ] && [ -d "$JAVA_HOME/bin" ] && PATH="$JAVA_HOME/bin:$PATH"
java -version > /dev/null 2>&1 || {
echo "$EXEC_NAME: unable to get Java version (is Java installed?)" >&2
exit 2
}
[ -n "$MAX_MEMORY" ] && JVM_FLAGS="-Xmx$MAX_MEMORY $JVM_FLAGS"
[ -n "$MIN_MEMORY" ] && JVM_FLAGS="-Xms$MIN_MEMORY $JVM_FLAGS"
MCA_CMD="$(which java) -server $JVM_FLAGS -jar $MCA_JAR"
# papermc prints uncolored text if the COLORTERM variable is set to `truecolor`
export COLORTERM=
# we don't quote $MCA_CMD because screen treats arguments after the second one as a command
# shellcheck disable=SC2086
exec screen -c "$MCA_SCREENRC_FILE" "-$SCREEN_OPTS"S "$MCA_NAME" -- $MCA_CMD

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screenrc Normal file
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termcapinfo xterm* ti@:te@
escape ^Bb
bind c
bind ^c
bind :
bind ^:
bind |
bind s
bind \"
bind -
bind i
bind ^i
bind o
bind ^o
bind f
bind ^f
bind x
bind ^x
bind h
bind ^h
bind g
bind ^g
bind r
bind ^r
bind t
bind ^t
bind p
bind ^p
bind n
bind ^n
bind v
bind .
bind ^.
bind ,
bind ^,
bind >
bind ^>
bind <
bind ^<
bind \'
bindkey ^c echo 'The CTRL+C keyboard shortcut has been disabled to prevent accidental process termination'