summertail Summarize your tail -f output, with regexes

You won't be able to count how many apache 200's are in the logs, so use a regex counter.

Watching hundreds of lines of log files scroll by doesn't mean you know what happened

Usage

summertail DELAY REGEX1 REGEX2 ...

Reads input from stdin, and for each line keeps track of how many of each REGEX is matched. Every DELAY seconds, the counters are reset, and a \n is printed.

The last column (other) is incremented for every line which doesn't match any of the regexes. If a line matches more than one regex, it will be counted for each regex.

If the REGEX starts with ! it will invert the regex. i.e. it counts lines which don't match that regex.

Installation

Install with cargo install summertail.

Example

$ tail -f /var/log/apache2/access.log | summertail 10s ' 200 ' ' 3\d\d ' \!' 200 '
🕛︎10:16:22 27 ▃▍   200 : 17 ( 63%) ▆▊   3\d\d : 10 ( 37%) ▃▍  ! 200 : 10 ( 37%) ▃▍  other:  0 (  0%)     
🕛︎10:16:32 37 ▄▌   200 : 15 ( 41%) ▄▌   3\d\d : 19 ( 51%) ▅▋  ! 200 : 22 ( 59%) ▅▋  other:  0 (  0%)     
🕚︎10:16:41 23 ▃▍   200 :  8 ( 35%) ▃▍   3\d\d : 15 ( 65%) ▆▊  ! 200 : 15 ( 65%) ▆▊  other:  0 (  0%)     
🕛︎10:16:52 23 ▃▍   200 :  6 ( 26%) ▃▍   3\d\d : 16 ( 70%) ▆▊  ! 200 : 17 ( 74%) ▆▊  other:  0 (  0%)     
🕛︎10:17:02 47 ▅▋   200 : 11 ( 23%) ▂▎   3\d\d : 34 ( 72%) ▆▊  ! 200 : 36 ( 77%) ▇▉  other:  0 (  0%)     
🕛︎10:17:13 41 ▄▌   200 : 13 ( 32%) ▃▍   3\d\d : 24 ( 59%) ▅▋  ! 200 : 28 ( 68%) ▆▊  other:  0 (  0%)     
🕛︎10:17:23 48 ▅▋   200 : 20 ( 42%) ▄▌   3\d\d : 27 ( 56%) ▅▋  ! 200 : 28 ( 58%) ▅▋  other:  0 (  0%)     
🕛︎10:17:33 53 ▆▊   200 : 25 ( 47%) ▄▌   3\d\d : 28 ( 53%) ▅▋  ! 200 : 28 ( 53%) ▅▋  other:  0 (  0%)     
🕛︎10:17:44 30 ▃▍   200 :  9 ( 30%) ▃▍   3\d\d : 21 ( 70%) ▆▊  ! 200 : 21 ( 70%) ▆▊  other:  0 (  0%)     
🕛︎10:17:54 79 ██   200 : 31 ( 39%) ▄▌   3\d\d : 43 ( 54%) ▅▋  ! 200 : 48 ( 61%) ▅▋  other:  0 (  0%)     
🕛︎10:18:04 129 ██   200 :  69 ( 53%) ▅▋   3\d\d :  60 ( 47%) ▄▌  ! 200 :  60 ( 47%) ▄▌  other:   0 (  0%)     
🕛︎10:18:14  19 ▂▎   200 :   5 ( 26%) ▃▍   3\d\d :  14 ( 74%) ▆▊  ! 200 :  14 ( 74%) ▆▊  other:   0 (  0%)     
🕚︎10:18:24  62 ▅▋   200 :  22 ( 35%) ▃▍   3\d\d :  38 ( 61%) ▅▋  ! 200 :  40 ( 65%) ▆▊  other:   0 (  0%)     
🕚︎10:18:34 159 ██   200 :  20 ( 13%) ▂▎   3\d\d : 138 ( 87%) ▇▉  ! 200 : 139 ( 87%) ▇▉  other:   0 (  0%)     
🕛︎10:18:44  34 ▂▎   200 :   4 ( 12%) ▁▏   3\d\d :  30 ( 88%) ██  ! 200 :  30 ( 88%) ██  other:   0 (  0%)     
🕛︎10:18:55  50 ▃▍   200 :  10 ( 20%) ▂▎   3\d\d :  40 ( 80%) ▇▉  ! 200 :  40 ( 80%) ▇▉  other:   0 (  0%)

Copyright

Copyright © 2022, GNU Affero GPL licence v3 or later. Source code: https://github.com/amandasaurus/summertail