Design a better log message format. Add log level `-l, --log-level` option.

[vhbui02]

[vhbui02]

Here are the proposed design for my log functions:

# source.sh
# ...

# DESC: Print message with printf-like formatting and appropriate styling
# ARGS: $1 (required): The color of the message
#       $2 (required): The type of log
#       $3 (required): The formatted string or non-format string.
#       $4+ (optional): Arguments for the format string if $3 is a formatted string
# OUTS: Message to stderr and optionally to a log file
# RETS: 0
function _log() {}

function success() { }
functon error() {}
function warn() {}
function info() {}
function debug {}

Log level option:

# script.sh

function parse_params() {

# ...
-l | --log-level)
    _flag_log_level=true
    ;;
# ...
}

Log format message:

"%s%s[%s]: %b%-5s%b %s\n"

• Timestamp
• Caller's name
• Line numbers
• ANSI escape code color
• Log type, there will 5 types, enclosed in square brackets
• ANSI escape code color blank
• Message

[vhbui02]

On second thought, success() and info() doesn't have a clear boundary, I will remove success().