Bash Logger gives you powerful logging for your bash scripts including:

• Log levels
• Logging channels
• Logging context

Just source the src/index file with max-level, channel and optional prefix positional arguments in a suitable place for your project, and then call the relevant log level function with a message and optional context.

source [path/2/bash-logger/]src/index "INFO" path/2/file.log

log::debug "This is a debug message"
# no output as the log-level 'DEBUG' was not reached

log::info "This is an info message"
# output: [TIMESTAMP] INFO - This is an info message

The first argument to bash-logger is a string representing the maximum level that logging should reach. This allows different levels of logging to be set in different environments. Available levels in ascending order are:

• EMERGENCY
• ALERT
• CRITICAL
• ERROR
• WARNING
• NOTICE
• INFO
• DEBUG

The channel can be used to direct logging output, which can be any writeable file or terminal – using, for instance, $(tty).

A prefix on all log messages can also be set by optionally passing in a string as the third argument to the source file call. Setting a prefix can improve readability of log messages.