Install as3shebang on Cloud Shell

setup.sh

#!/bin/bash -e

# functions

check_tool() {
  command -v "$1" >/dev/null 2>&1 || (echo "You need to install '$1'" && exit 2)
}

find_tool() {
  local result=`command -v "$1"`;
  
  if [ -n "$result" ]; then
    return 0;
  fi
  
  return 1;
}

find_file() {
  local file="$1";
  
  if [ -f $file ]; then
    return 0;
  fi
  
  return 1;
}

detect_platform() {
    local PLATFORM="";
    case "$(uname -s)" in

       Darwin)
         PLATFORM="macintosh"
         ;;

       Linux)
         PLATFORM="linux"
         ;;

       CYGWIN*)
         PLATFORM="windows"
         ;;

       *)
         PLATFORM="unknown"
         ;;
    esac

    echo "${PLATFORM}";
}

current_dir() {
    echo "$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )";
}

get_timer() {
  echo `date +%s`;
}

time_diff() {
  local start=$1;
  local end=$2;
  local secs=$( echo "$end - $start" | bc -l );
  echo $( printf '%02dh:%02dm:%02ds\n' $(($secs/3600)) $(($secs%3600/60)) $(($secs%60)) );
}

# --- main ---

# check platform
PLATFORM=`detect_platform`;

if [[ "$PLATFORM" == "unknown" ]]; then
    echo "Could not detect the platform";
    exit 1;
fi

if [[ "$PLATFORM" != "linux" ]]; then
    echo "You need to run the setup script under a 'linux' operating system";
    exit 1;
fi

# options
AS3SHEBANG_DEB="as3shebang_1.0.0_amd64.deb";
AS3SHEBANG_URL="https://github.com/Corsaair/as3shebang/releases/download/1.0.0/${AS3SHEBANG_DEB}";
NO_WARNING="~/.cloudshell/no-apt-get-warning";

# colors
RED="\e[1;31m"
YELLOW="\e[1;33m"
PURPLE="\e[1;35m"
NC="\e[0m"

setup_start=$(get_timer);

echo -e "${PURPLE}Running as3shebang setup...${NC}";
echo -e "${RED}Installing dependencies${NC}";

if ! find_file ${NO_WARNING}; then
  if [ ! -d ".cloudshell/" ]; then
    mkdir .cloudshell/;
  fi
  touch .cloudshell/no-apt-get-warning;
fi

if ! find_tool bc; then
  sudo apt-get -qq -y install bc;
fi
    
if ! find_tool lsb_release; then
  sudo apt-get -qq -y install lsb-release;
fi
 
PRETTY_NAME=`lsb_release -ds`;

if ! find_tool as3shebang; then
  
  if ! find_file ${AS3SHEBANG_DEB}; then
    echo -e "${PURPLE}Downloading as3shebang${NC}";
    wget -q --show-progress ${AS3SHEBANG_URL} -O ${AS3SHEBANG_DEB};
  fi
  echo -e "${RED}Installing as3shebang${NC}";
  sudo dpkg -i ${AS3SHEBANG_DEB};
fi

if [ ! -f "sysinfo" ]; then
echo -e "${RED}Creating 'sysinfo' script${NC}";
cat << 'EOF' > sysinfo
#!/usr/bin/as3shebang
         
import shell.Runtime;
import shell.OperatingSystem;
       
trace( "Welcome to Redtamarin v" + Runtime.version );
trace( "" );

trace( "Runtime:" );
trace( "    |_ api : " + Runtime.api );
trace( "    |_ apiVersion : " + Runtime.apiVersion );
trace( "    |_ architecture : " + Runtime.architecture );
trace( "    |_ AVMversion : " + Runtime.AVMversion );
trace( "    |_ codename : " + Runtime.codename );
trace( "    |_ description : " + Runtime.description );
trace( "    |_ endian : " + Runtime.endian );
trace( "    |_ label : " + Runtime.label );
trace( "    |_ platform : " + Runtime.platform );
trace( "    |_ redtamarin : " + Runtime.redtamarin );
trace( "    |_ runmode : " + Runtime.runmode );
trace( "    |_ swfVersion : " + Runtime.swfVersion );
trace( "    |_ tag : " + Runtime.tag );
trace( "    |_ version : " + Runtime.version );
trace( "    |_ version" );
trace( "    |   |_ major : " + Runtime.version.major );
trace( "    |   |_ minor : " + Runtime.version.minor );
trace( "    |   |_ patch : " + Runtime.version.patch );
trace( "    |   |_ serie : " + Runtime.version.serie );
trace( "    |   |_ cycle : " + Runtime.version.cycle );
trace( "    |   |_ build : " + Runtime.version.build );
trace( "    |_ features : " );
trace( "        |_ " + Runtime.features.substr(0, Runtime.features.length-1).split( ";" ).join( "\n        |_ " ) );
trace( "" );
 
trace( "Operating System:" );
trace( "    |_ codename: " + OperatingSystem.codename );
trace( "    |_ hostname: " + OperatingSystem.hostname );
trace( "    |_ longDescription: " + OperatingSystem.longDescription );
trace( "    |_ name: " + OperatingSystem.name );
trace( "    |_ username: " + OperatingSystem.username );
trace( "    |_ vendor: " + OperatingSystem.vendor );
trace( "    |_ vendorBuild: " + OperatingSystem.vendorBuild );
trace( "    |_ vendorDescription: " + OperatingSystem.vendorDescription );
trace( "    |_ vendorName: " + OperatingSystem.vendorName );
trace( "    |_ vendorVersion: " + OperatingSystem.vendorVersion );
trace( "    |_ version: " + OperatingSystem.version );
trace( "" );
    
EOF
chmod +x sysinfo;
fi

if [ ! -f "uninstall" ]; then
echo -e "${RED}Creating 'uninstall' script${NC}";
cat << EOF > uninstall
#!/bin/bash
echo -e "${PURPLE}Uninstall running ...${NC}";
sudo rm sysinfo;
sudo rm ${AS3SHEBANG_DEB};
sudo rm /usr/bin/as3shebang;
sudo apt-get -qq -y remove lsb-release;
sudo apt-get -qq -y remove bc;
sudo rm -Rf ~/.cloudshell/;
sudo rm uninstall;
echo -e "${RED}Removed as3shebang and all dependencies${NC}";
echo "";
EOF
chmod +x uninstall;
fi
    
setup_end=$(get_timer);
setup_total=$(time_diff $setup_start $setup_end)
echo "";
echo -e "${RED}It took ${YELLOW}$setup_total${NC}${RED} to install as3shebang on ${PURPLE}${PRETTY_NAME}${NC}${NC}";
echo -e "${RED}Try to run the 'sysinfo' script with './sysinfo'${NC}";
echo "";
echo -e "${RED}If you want to revert everything and uninstall as3shebang${NC}";
echo -e "${RED}Run the 'uninstall' script with './uninstall'${NC}";
echo -e "${RED}(you will have to delete 'setup.sh' manually)${NC}";
echo "";

If you need to test as3shebang quickly and you have a google mail / gmail account

go to this URL
https://console.cloud.google.com/cloudshell/editor?pli=1&shellonly=true

and run this command
$ wget -q --show-progress https://gist.githubusercontent.com/zwetan/297813e2716fbfcd84babda42900a99a/raw/5698dce8c38468d78c5b79e3c558ce09b659561f/setup.sh -O setup.sh && chmod +x setup.sh && ./setup.sh

do not type the $, this is a convention to indicate you're typing a shell command

the setup output something like that

if you run $ ./sysinfo it will output something like that

if you want to uninstall everything run $ ./uninstall and then $ rm setup.sh

If you don't uninstall, the setup.sh script and the downloaded files will be kept around in your $HOME directory
thanks to Google Cloud Shell 5GB of Persistent Disk Storage

you can even automate this setup by editing your ~/.profile and adding those lines at the very end

if [ -f "$HOME/setup.sh" ] ; then
    $HOME/setup.sh
fi

that way, despite the limitations, each time you will run your Cloud Shell, as3shebang will be available to use :).