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							- #!/bin/bash -e
 
- # log helper base on environment variable CONTAINER_LOG_LEVEL
 
- # CONTAINER_LOG_LEVEL environment variable is set by run tool based on --log-level argument (info by default)
 
- # or you can set it directly with docker --env argument
 
- # Usage example: log-helper info CONTAINER_LOG_LEVEL is info or more
 
- # the message "CONTAINER_LOG_LEVEL is info or more" will be printed only if log level is info, debug or trace
 
- LOG_LEVEL_NONE=0
 
- LOG_LEVEL_ERROR=1
 
- LOG_LEVEL_WARNING=2
 
- LOG_LEVEL_INFO=3
 
- LOG_LEVEL_DEBUG=4
 
- LOG_LEVEL_TRACE=5
 
- # default log level if CONTAINER_LOG_LEVEL is not set -> info
 
- log_level=${CONTAINER_LOG_LEVEL:-${LOG_LEVEL_INFO}}
 
- call=$1 # function to call (error, warning, info, debug, trace, level)
 
- if [[ ! "$call" =~ ^(error|warning|info|debug|trace|level)$ ]]; then
 
-     echo "Error: Function $call not found"
 
-     echo "Allowed functions are: error, warning, info, debug, trace, level"
 
-     echo "usage example: log-helper info hello !"
 
-     exit 1
 
- fi
 
- echo_msg="" # message to print if required log level is set
 
- echo_param="" # echo command parameters
 
- function print_log(){
 
-     local level_txt=$1
 
-     local message=$2
 
-     local date=$(date +"%Y-%m-%d %T")
 
-     readarray -t messages <<<"$message"
 
-     for m in "${messages[@]}"; do
 
-         echo "*** ${level_txt} | ${date} | ${m}"
 
-     done
 
- }
 
- function error() {
 
-     # getEchoParams no matter what level it is to not break pipes
 
-     getEchoParams $@
 
-     if [ $log_level -ge 1 ]; then
 
-         echo $echo_param  "$(print_log " ERROR " "$echo_msg")"
 
-     fi
 
- }
 
- function warning() {
 
-     # getEchoParams no matter what level it is to not break pipes
 
-     getEchoParams $@
 
-     if [ $log_level -ge 2 ]; then
 
-         echo $echo_param  "$(print_log "WARNING" "$echo_msg")"
 
-     fi
 
- }
 
- function info() {
 
-     # getEchoParams no matter what level it is to not break pipes
 
-     getEchoParams $@
 
-     if [ $log_level -ge 3 ]; then
 
-         echo $echo_param "$(print_log " INFO  " "$echo_msg")"
 
-     fi
 
- }
 
- function debug() {
 
-     # getEchoParams no matter what level it is to not break pipes
 
-     getEchoParams $@
 
-     if [ $log_level -ge 4 ]; then
 
-         echo $echo_param "$(print_log " DEBUG " "$echo_msg")"
 
-     fi
 
- }
 
- function trace() {
 
-     # getEchoParams no matter what level it is to not break pipes
 
-     getEchoParams $@
 
-     if [ $log_level -ge 5 ]; then
 
-         echo $echo_param "$(print_log " TRACE " "$echo_msg")"
 
-     fi
 
- }
 
- function getMsgFromStdin() {
 
-     if [ -z "$2" ]; then
 
-         echo_msg=$(cat)
 
-     fi
 
- }
 
- function getEchoParams() {
 
-     
 
-     echo_msg="$@"
 
-     
 
-     if [[ "$1" =~ ^(-e|-n|-E)$ ]]; then
 
-         echo_param=$1
 
-         echo_msg=${echo_msg#$1 }
 
-     fi
 
-     
 
-     # read from pipe if echo_msg is empty
 
-     [[ -n "$echo_msg" ]] || getMsgFromStdin
 
- }
 
- function level() {
 
-     
 
-     local operator=$1
 
-     local loglevel_str=$2
 
-     local loglevel_str=${loglevel_str^^} # uppercase
 
-     
 
-     if [[ ! "$operator" =~ ^(eq|ne|gt|ge|lt|le)$ ]]; then
 
-         echo "Error: Operator $operator not allowed"
 
-         echo "Allowed operators are: eq, ne, gt, ge, lt, le"
 
-         echo "Help: http://www.tldp.org/LDP/abs/html/comparison-ops.html"
 
-         exit 1
 
-     fi
 
-     
 
-     if [ -z "$loglevel_str" ]; then
 
-         echo "Error: No log level provided"
 
-         echo "Allowed log level are: none, error, warning, info, debug, trace"
 
-         echo "usage example: log-helper level eq info"
 
-         exit 1
 
-     fi
 
-     
 
-     local log_level_var=LOG_LEVEL_$loglevel_str
 
-     
 
-     if [ $log_level -$operator ${!log_level_var} ]; then
 
-         exit 0
 
-     else
 
-         exit 1
 
-     fi
 
- }
 
- shift
 
- $call "$@"
 
 
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