Bash Logging Snip

bash_logger.sh

#!/bin/bash

# bash_logger.sh

LOGFILE=log_output.txt

#######################################
# Log to the terminal and a file.
# Globals:
#    LOGFILE
# Arguments:
#    [level] [msg]
# Usage:
#   log "NOTICE some notice level message"
#   log "INFO some info message"
#   log "WARNING some warning message"
#   log "ERROR some error message"
#   log "DEBUG (catch-all) some debug message"
#######################################
function log(){

    DEFAULT="\033[0m"

    log_notice() {
        GREEN_COLOR="\033[0;32m"
        echo -e "${GREEN_COLOR}${1:-} ${DEFAULT}"
    }

    log_info() {
        BLUE_COLOR="\033[0;34m"
        echo -e "${BLUE_COLOR}${1:-} ${DEFAULT}"
    }

    log_warning() {
      YELLOW_COLOR="\033[33m"
      echo -e "${YELLOW_COLOR}${1:-} ${DEFAULT}"
    }

    log_error() {
        RED_COLOR="\033[0;31m"
        echo -e "${RED_COLOR}${1:-}${DEFAULT}"
    }

    local msg_type
    local msg
    msg_type=$(echo "$@"|cut -d" " -f1)
    msg="$(echo "$@"|cut -d" " -f2-)"
    msg="$(date "+%Y-%m-%d %H:%M:%S %Z") [$msg_type] [$$] $msg"
    case "$msg_type" in
    'NOTICE') log_notice "$msg" | tee -a "$LOGFILE" ;;
    'INFO') log_info "$msg" | tee -a "$LOGFILE" ;;
    'WARNING') log_warning "$msg" | tee -a "$LOGFILE" ;;
    'ERROR') log_error "$msg" | tee -a "$LOGFILE" ;;
    *) echo "$msg" | tee -a "$LOGFILE" ;;
    esac
}

log "NOTICE some notice level message"
log "INFO some info message"
log "WARNING some warning message"
log "ERROR some error message"
log "DEBUG (catch-all) some debug message"
log "This is an incorrectly formatted message"