Common functions to be used in scripts for formatted logging

common.sh

#!/bin/bash

# This script not intended to run by itself, nor have exec permissions.
# This script intended only for sourcing from other scripts to reduce copy-paste code.

# Redirect STDOUT and STDERR to the system logger (syslog-ng).
function log () {
  log_args='-i'
  log_args="$log_args -u/dev/log"
  log_args="$log_args -t $1"
  test -t 1 -a -z "$NO_STDERR" && \
    log_args="$log_args -s"
  while read logline; do
    echo "$logline" | logger $log_args
  done
}

function log_debug_msg () {
  echo -e "[ \e[36mDBUG\e[0m ]: $@"
}
function log_info_msg () {
  echo -e "[ \e[34mINFO\e[0m ]: $@"
}
function log_error_msg () {
  echo -e "[ \e[31mERR\e[0m  ]: $@"
}
function log_warn_msg () {
  echo -e "[ \e[33mWARN\e[0m ]: $@"
}
function log_ok_msg () {
  echo -e "[  \e[32mOK\e[0m  ]: $@"
}
function log_fail_msg () {
  echo -e "[ \e[31mFAIL\e[0m ]: $@"
}