jitty-scripts/crystal-installer.sh

#!/bin/bash

NAME="crystal"
VERSION="0.28.0"
REV="1"
ARCH="x86_64"
PREFIX="/usr"
TMP="/tmp"
URL="https://github.com/crystal-lang/crystal/releases/download/${VERSION}/${NAME}-${VERSION}-${REV}-linux-${ARCH}.tar.gz"



download_(){
    if [ ! -f ${TMP}/${NAME}-${VERSION}-${REV}-linux-${ARCH}.tar.gz ];then
    	printf "Downloading ${NAME}-${VERSION}-${ARCH}...\n"
    	wget ${URL} -P ${TMP}

    else
        echo "${NAME}-${VERSION}-${REV}-linux-${ARCH}tar.gz" exists
    fi
}

extract_(){
    printf "Ectracting archive file to ${TMP}...\n"
    cd ${TMP}
    tar -xzvf ${NAME}-${VERSION}-${REV}-linux-${ARCH}.tar.gz
}

install_(){
    printf "Copying files to system..\n"
    cd ${TMP}/${NAME}-${VERSION}-${REV}
    cp -r {bin,lib,share} ${PREFIX}/

}


download_
extract_
install_