#!/bin/bash

cat <<-EOF
#!/bin/bash
#=========================================
# Company  : Boyachain
# Create   : $(date +"%F %R")
# Author   : Who the f**k r u!
#=========================================

set -euo pipefail
umask 0022
export LANG=en_US.UTF-8

PID_FILE=/tmp/\$(basename \${0%.sh}).pid

if [ -t 0 ]; then
    function Print { echo -e "\033[36;1m\$(date +'[%F %T]')\033[32;1m \$*\033[0m"; }
    function Warn { echo -e "\033[36;1m\$(date +'[%F %T]')\033[33;1m \$*\033[0m"; }
    function Error { echo -e "\033[36;1m\$(date +'[%F %T]')\033[31;1m \$*\033[0m"; exit 1; }
else
    #exec &> \${0%.sh}.out
    function Print { echo -e "\$(date +'[%F %T INFO]') \$*"; }
    function Warn { echo -e "\$(date +'[%F %T WARN]') \$*"; }
    function Error { echo -e "\$(date +'[%F %T ERROR]') \$*"; exit 1; }
fi

function Quit {
    local exitCode=\$?
    rm -f \$PID_FILE
    [ 0 -ne \$exitCode ] && Error Failed to xxxx!
    [ -z "\${END:-}" ] && echo && Error Interrupted manually!
    Print Succeeded to xxxx.
}

function Func1 {
    Warn Func1 ...
}

function Func2 {
    Warn Func2 ...
}

function CheckLock {
    Warn Checking lock ...
    [ -e "\$PID_FILE" ] \\
        && [ -d "/proc/\$(cat \$PID_FILE)" ] \\
        && cat /proc/\$(cat \$PID_FILE)/cmdline \\
        && echo \\
        && Error Pid file \$PID_FILE already exists, quit!
    echo \$\$ > \$PID_FILE
}

function Main {
    CheckLock
    trap Quit EXIT
    Warn Main ...
    Func1
    Func2
    END=1
}

# Start here
Main
EOF