Parse input lines using custom patterns and output more readable and helpful lines.
npm install -g linecat
linecat -p=pattern_path
pattern_path is the custom pattern json file. Example patterns json files are listed in src/example-patterns.
| field | require | note |
|---|---|---|
| id | no | the id of current pattern, which can be referenced in outputFormat field |
| line | no | regular expression for whole line content |
| outputFormat | no | specific output line format. Available env variables are listed below. |
Many env variables are available in outputFormat field:
| Env var name | note |
|---|---|
| id | current pattern id |
| line | whole line |
| content | whole line except other tokens |
| level | log level if available |
| month | month of current line if available |
| day | date of current line if available |
| hours | hours of current line if available |
| minutes | minute of current line if available |
| seconds | seconds of current line if available |
| ms | ms of current line if avaiilable |
| timediff | time diff from current line. |
| last-[id|line]-{...} | last matched line of specific id or any matched line for fields above. eg: last-line-timediff
|
You can also check example patterns in src/example-patterns to know more usage.