DEV Community

Cover image for NPM debug style logging in Go

NPM debug style logging in Go

Derek Smith
Husband, father, engineer. Passionate about the craft and quality.
・1 min read

I have always appreciated the debug logging pattern commonly used within NodeJS projects. As I worked more with go, I wanted to bring that logging pattern to the language.

kemba is a simple logging library that is a reimplementation of the npm debug module in hopes of bringing that capability to the language.

The kemba logger reads the DEBUG and KEMBA environment variables to determine if a log line should be output. The logger outputs to STDERR.

When it is not set, the logger will immediately return, taking no action.

When the value is set (ex. DEBUG=example:*,tool:details and/or KEMBA=plugin:fxn:start), the logger will determine if it should be enabled when instantiated.

The value of these flags can be a simple regex alternative where a wildcard (*) are replaced with .* and all terms are prepended with ^ and appended with $. If a term does not include a wildcard, then an exact match it required.

Mentioned in Awesome<br>

Discussion (0)

Forem Open with the Forem app