346 lines
9.4 KiB
Bash
Executable File
346 lines
9.4 KiB
Bash
Executable File
#!/bin/bash
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### CONSTANTS ###
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#gigabytes
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MAX_MEM=8
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#gigabytes
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INITIAL_MEM=2
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#rcon password
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DEFAULT_RCON_PASSWORD="bqMLwxCJKRktrQoir2pg4KkTeBDQLjb4C+RYesdmeKF4sie8"
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echo_rgb() {
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# Echo a colored string to the terminal based on rgb values
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#
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# Positional Arguments:
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#
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# message <type: string> <position: 1> <required: true>
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# - The message to be printed to stdout
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# red <type: int> <position: 2> <required: true>
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# - The red value from 0 to 255
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# green <type: int> <position: 3> <required: true>
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# - The green value from 0 to 255
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# blue <type: int> <position: 4> <required: true>
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# - The blue value from 0 to 255
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#
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# Usage:
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# echo_rgb 10 80 3 "Yep"
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#
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# POSIX Compliant:
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# N/A
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#
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local red
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local green
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local blue
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local input
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input="${1}"
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red="${2}"
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green="${3}"
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blue="${4}"
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printf "\e[0;38;2;%s;%s;%sm%s\e[m\n" "${red}" "${green}" "${blue}" "${input}"
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}
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log() {
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# Print a message and send it to stdout or stderr depending upon log level, also configurable with debug etc.
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#
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# Arguments:
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# level <type: string> <position: 1> <required: true>
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# - The log level, defined within a case check in this function
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# message <type: string> <position: 2> <required: true>
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# - The info message
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# line_number <type: int> <position: 3> <required: false>
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# - The line number of the calling function (${LINNO})
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#
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# Usage:
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# log "info" "Could not find that directory"
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#
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# POSIX Compliant:
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# Yes
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#
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# Set debug status depending if a global debug variable has been set to either 1 or 0
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local debug
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if [ ${DEBUG} ]; then
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debug=${DEBUG}
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else
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debug=0
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fi
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local FORMAT
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FORMAT="[$(echo_rgb "$(date +%Y-%m-%dT%H:%M:%S%z)" 180 140 255)]"
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# Convert the level to uppercase
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local level
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level=$(echo "${1}" | tr '[:lower:]' '[:upper:]')
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local message
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message="${2}"
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case "${level}" in
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INFO)
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# Output all info log levels to stdout
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printf "${FORMAT}[$(echo_rgb "INFO" 0 140 255)] %s\n" "${message}" >&1
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return 0
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;;
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WARN | WARNING)
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# Output all info log levels to stdout
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printf "${FORMAT}[$(echo_rgb "WARNING" 255 255 0)] %s\n" "${message}" >&1
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return 0
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;;
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DEBUG)
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[[ ${debug} == 0 ]] && return 0
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printf "${FORMAT}[$(echo_rgb "DEBUG" 0 160 110)] %s\n" "${message}" >&1
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return 0
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;;
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ERROR)
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# Output all error log levels to stderr
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printf "${FORMAT}[$(echo_rgb "ERROR" 255 0 0)] %s\n" "${message}" >&2
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return 0
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;;
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# Further log levels can be added by extending this switch statement with more comparisons
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*) # Default case, no matches
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# Returns non-zero code as an improper log option was passed, this helps with using `set -e`
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printf "${FORMAT}[ERROR] %s\n" "Invalid log level passed, received level \"${level}\" with message \"${message}\"" >&2
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return 1
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;;
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esac
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}
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confirmation() {
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# Receive confirmation from user as y, Y, n, or N
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# returns 0 when answer is yes and 1 when answer is no
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#
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# Arguments:
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# message <type: string> <position: 1> <required: true>
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# - The confirmation prompt sent to the user, for example:
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# Would you like to overwrite foobar.txt (y/N)?
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#
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# Usage:
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# confirmation "Some prompt"
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# - Sends "Some prompt" to the user and gets their input
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#
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# POSIX Compliant:
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# Yes
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#
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local message
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message="${1}"
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local choice
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while true; do
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read -p "${message} " -n 1 -r choice
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case "$choice" in
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y | Y)
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echo ""
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return 0
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;;
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n | N)
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echo ""
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return 1
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;;
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*) echo -e "\nInput must be either y, Y, n, or N" ;;
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esac
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done
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}
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usage() {
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# Print out usage instructions for the local script
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#
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# Arguments:
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# None
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#
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# Usage:
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# usage
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#
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# POSIX Compliant:
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# Yes
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#
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printf "Usage: %s\n" \
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"$(basename "${0}") -s <server id> | $(basename "${0}") -s <server id> -r | $(basename "${0}") -s <server id> -j <path/to/minecraft/jar>
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--server <server id> -s <server id>
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Which minecraft server to start, see the ~/Minecraft directory -- each number corresponds to an ID
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Example:
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--server 1
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--r | --rcon-ignore
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Flag that takes no parameters -- when enabled this script will not overwrite the RCON password in the targeted server
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Example:
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--rcon-ignore
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--jar <path/to/mc/server/jar/file> | -j <path/to/mc/server/jar/file>
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Takes in a path to a minecraft server jar file. It copies that file to create the new server
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Example:
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--jar ~/Minecraft-Server-Jars/minecraft_server1.17.1.jar"
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}
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server_id=""
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minecraft_jar=""
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rcon_ignore=0
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parse_args() {
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# Parse input arguments
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#
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# Arguments:
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# Consult the `usage` function
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#
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# Usage:
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# parse_args "$@"
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# - All arguments should be ingested by parse_args first for variable setting
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#
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# POSIX Compliant:
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# Yes
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#
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while :; do
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case ${1} in
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-h | -\? | --help)
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usage # Display a usage synopsis.
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exit
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;;
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--) # End of all options.
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break
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;;
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-s | --server)
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shift
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server_id="${1}"
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;;
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-j | --jar)
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shift
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minecraft_jar="${1}"
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;;
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-r | --rcon-ignore)
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rcon_ignore=1
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;;
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-?*)
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printf 'Unknown option: %s\n' "$1" >&2
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usage
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;;
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*) # Default case: No more options, so break out of the loop.
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break ;;
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esac
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shift
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done
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}
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parse_args "$@"
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# Check and see that the correct variables were set, some may not be expanded as if they're empty they're useless
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# anyhow
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[[ -z "${server_id}" ]] && log "error" "No server ID provided" && exit 1
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[[ "${server_id}" =~ [0-9] ]] || (log "error" "Server ID must be a number, received: ${server_id}" && exit 1)
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minecraft_directory=~/Minecraft/Server-"${server_id}"
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create_directories() {
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mkdir -p "${minecraft_directory}"
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mkdir -p "${minecraft_directory}/backups"
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cd "${minecraft_directory}" || (log "error" "Unable to change directory to ${minecraft_directory}" && exit 1)
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}
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create_directories
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if [ -n "${minecraft_jar}" ]; then
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if [ ! -f "${minecraft_jar}" ]; then
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log "error" "Could not find a minecraft server jar \"${minecraft_jar}\""
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exit 1
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fi
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minecraft_jar_name="$(basename "${minecraft_jar}")"
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log "info" "Copying minecraft server files..."
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cp "${minecraft_jar}" "${minecraft_directory}" \
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&& log "info" "Finished copying files"
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mv "${minecraft_directory}/${minecraft_jar_name}" "${minecraft_directory}/server.jar"
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log "info" "Installed a minecraft server.jar to Minecraft-Server-${server_id}"
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java -jar "${minecraft_directory}"/server.jar > /dev/null 2>&1
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log "info" "Successfully installed the minecraft server.jar to Minecraft-Server-${server_id}, continuing with setup"
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elif [ ! -f "${minecraft_directory}"/server.jar ]; then
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log "error" "No server.jar found within ${minecraft_directory}, to create a new server there use the \"--jar\" flag"
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exit 1
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fi
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server_port=$(("12000" + "${server_id}"))
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query_port=$(("12100" + "${server_id}"))
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rcon_port=$(("12200" + "${server_id}"))
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## Create a backup of the config file
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backup_extension="$(date +%Y-%m-%dT%H:%M:%S%z)"
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log "info" "Making a backup of the server.properties file in ${minecraft_directory}/backups/server.properties.${backup_extension}"
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rm -f
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cp "${minecraft_directory}/server.properties" "${minecraft_directory}/backups/server.properties.${backup_extension}" \
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&& log "info" "Successfully created backup"
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## Set the correct ports
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sed -i "s/server-port=.*/server-port=${server_port}/g" server.properties \
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&& log "info" "Set the server port to ${server_port}" || exit 1
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sed -i "s/query.port=.*/query.port=${query_port}/g" server.properties \
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&& log "info" "Set the query port to ${query_port}" || exit 1
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sed -i "s/rcon.port=.*/rcon.port=${rcon_port}/g" server.properties \
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&& log "info" "Set the RCON port to ${rcon_port}" || exit 1
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## Turn RCON On
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# set the rcon password to the default if rcon-ignore is not set
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if [[ "${rcon_ignore}" == 0 ]]; then
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log "info" "Setting the RCON password..."
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[[ -z "${DEFAULT_RCON_PASSWORD}" ]] \
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&& log "warning" "No RCON password has been defined within $(basename "${0}"), consider generating one with \"openssl rand -base64 36\""
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sed -i "s/rcon.password=.+/rcon.password=${DEFAULT_RCON_PASSWORD}/g" server.properties \
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&& log "info" "RCON password set"
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fi
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## Accept the eula
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sed -i "s/eula=false/eula=true/g" eula.txt \
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&& log "info" "Minecraft eula accepted"
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## Go ahead and start 'er on up
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tmux has-session -t "Minecraft-Server-${server_id}" > /dev/null 2>&1
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if [ "${?}" == 0 ]; then
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log "warning" "That minecraft server is currently running"
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confirmation "Would you like to kill it and then run the new one (y/N)?"
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if [ "${?}" == 0 ]; then
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log "info" "Ok, killing server..."
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tmux kill-session -t "Minecraft-Server-${server_id}" \
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&& log "info" "Successfully killed the server"
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else
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log "info" "Not ending current Minecraft-Server-${server_id}, exiting..."
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exit 0
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fi
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fi
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log "info" \
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"Startup Arguments:
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-Xms${INITIAL_MEM}G
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-Xmx${MAX_MEM}G
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-jar"
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log "info" "Starting Minecraft-Server-${server_id}"
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tmux new-session -d -s \
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"Minecraft-Server-${server_id}" \
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java -Xms"${INITIAL_MEM}G" -Xmx"${MAX_MEM}G" -jar server.jar --nogui \
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&& log "info" \
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"Server Minecraft-Server-${server_id} started successfully:
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Game Port: ${server_port}
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Query Port: ${query_port}
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RCON Port: ${rcon_port}"
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