yay adds colour to your log files so you can spot things you're looking for easily
$ echo "i have some cheese" | yay cheese is yellow
$ echo "i want to see errors, warnings and info differently" | yay errors are red, warnings are yellow and info is green
- a simple language for creating rules
- regexps can be used to match things like dates
- complex, multi-lined rules can be stored in .yay files
- yay files can be shared using gists!
the syntax is designed to be easy to use but if the other examples seemed a bit too wordy, words like "and", "a", "are" and "is" are completely optional
$ echo "[error] [warning] [info]" | yay error and warning are red and info is green
$ echo "[error] [warning] [info]" | yay error warning red info green
you can set both foreground and background colours and use all the VT100 commands
$ echo "this is a match" | yay match is a dim blue red
if you want to make something really stand out, you can colour an entire line
$ echo "this line has matches" | yay matches are red yellow lines
you can treat matching words like regular expressions
$ echo "[error] something bad" | yay "(error|warning)" red
$ echo "[ERROR] something bad" | yay "/error/i" red
the default configuration works well for log4x and syslog outputs
$ tail /var/log/nginx/error.log | yay
you can load rules from .yay files, some of which are included
$ yay installed
you can download and install yay files from anywhere, including github gists
$ yay install my_rule https://raw.github.com/gist/1361474/cf1c2522f1c4df7f8d2d49da2d6186b530f5a3dd/log4x
$ echo "omg we have an unhandled exception" | yay my_rule
have fun! :D