103 lines
2.3 KiB
Bash
103 lines
2.3 KiB
Bash
#! /bin/bash
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LOG_RESET='\e[0m'
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LOG_LGRAY='\e[37m'
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LOG_LBLUE='\e[94m'
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LOG_BLUE='\e[34m'
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LOG_LYELLOW='\e[93m'
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LOG_RED='\e[91m'
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# ### DMS Logging Functionality
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#
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# This function provides the logging for scripts used by DMS.
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# It adheres to the convention for log levels.
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# Valid values (in order of increasing verbosity) are: `error`,
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# `warn`, `info`, `debug` and `trace`. The default log level
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# is `info`.
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#
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# #### Arguments
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#
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# $1 :: the log level to log the message with
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# $2 :: the message
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#
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# #### Panics
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#
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# If the first argument is not set or invalid, an error
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# message is logged. Likewise when the second argument
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# is missing. Both failures will return with exit code '1'.
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function _log
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{
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if [[ -z ${1+set} ]]
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then
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echo "Call to '_log' is missing a valid log level" >&2
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return 1
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fi
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if [[ -z ${2+set} ]]
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then
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echo "Call to '_log' is missing a message to log" >&2
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return 1
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fi
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local MESSAGE LEVEL_AS_INT LOG_LEVEL_FALLBACK
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MESSAGE="${LOG_RESET}["
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if [[ -e /etc/dms-settings ]]
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then
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LOG_LEVEL_FALLBACK=$(grep "^LOG_LEVEL=" /etc/dms-settings | cut -d '=' -f 2)
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LOG_LEVEL_FALLBACK="${LOG_LEVEL_FALLBACK:1:-1}"
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else
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LOG_LEVEL_FALLBACK='info'
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fi
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case "${LOG_LEVEL:-${LOG_LEVEL_FALLBACK}}" in
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( 'trace' ) LEVEL_AS_INT=5 ;;
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( 'debug' ) LEVEL_AS_INT=4 ;;
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( 'warn' ) LEVEL_AS_INT=2 ;;
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( 'error' ) LEVEL_AS_INT=1 ;;
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( * ) LEVEL_AS_INT=3 ;;
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esac
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case "${1}" in
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( 'trace' )
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[[ ${LEVEL_AS_INT} -ge 5 ]] || return 0
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MESSAGE+=" ${LOG_LGRAY}TRACE "
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;;
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( 'debug' )
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[[ ${LEVEL_AS_INT} -ge 4 ]] || return 0
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MESSAGE+=" ${LOG_LBLUE}DEBUG "
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;;
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( 'info' )
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[[ ${LEVEL_AS_INT} -ge 3 ]] || return 0
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MESSAGE+=" ${LOG_BLUE}INF "
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;;
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( 'warn' )
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[[ ${LEVEL_AS_INT} -ge 2 ]] || return 0
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MESSAGE+=" ${LOG_LYELLOW}WARNING "
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;;
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( 'error' )
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[[ ${LEVEL_AS_INT} -ge 1 ]] || return 0
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MESSAGE+=" ${LOG_RED}ERROR " ;;
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( * )
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echo "Call to '_log' with invalid log level argument '${1}'" >&2
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return 1
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;;
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esac
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MESSAGE+="${LOG_RESET}] ${2}"
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if [[ ${1} =~ ^(warn|error)$ ]]
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then
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echo -e "${MESSAGE}" >&2
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else
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echo -e "${MESSAGE}"
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fi
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}
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function _log_with_date { _log "${1}" "$(date '+%Y-%m-%d %H:%M:%S') ${2}" ; }
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