sergees•10mo ago

Choose level for std logger

I have some loggers configured using the setup function from std/log. This way levels are hard-coded. I would like to be able to pass a --debug option to my script to activate the DEBUG level, otherwise use INFO and above. Is it possible to achieve this using std/log? If not, what are other libs you can recommend instead?

9 Replies

marvinh.•10mo ago

Detect the CLI flag and set the appropriate log level on the Logger instance (or your custom once). Only log levels equal to the one on the Logger instance or higher are logged

sergeesOP•10mo ago

There a function getLogger which return logger instance. It only accepts name as a parameter, no way to pass level there. The level doesn’t seem to have a setter, so this code won’t work:

const logger = getLogger('my_logger');
logger.level = 'DEBUG';

const logger = getLogger('my_logger');
logger.level = 'DEBUG';

Ah okay levelName seems to work

cknight•10mo ago

Sounds like you've got a working solution. I've written an alternative logging framework which can do this through the use of environment variables or command line options. https://github.com/onjara/optic

Leokuma•10mo ago

Much better than std's logger IMO

NDH•10mo ago

Perhaps a pr to upgrade std before std 1.0 ?

cknight•10mo ago

Thanks! That's kind of you, however, my logger isn't really a good fit for std I think. For starters the fluent interface would be out of place there.

NDH•10mo ago

Just a thought. Love your work!

sergeesOP•10mo ago

Nice! One thing I’m missing in std logger is the trace level

iuioiua•10mo ago

Suggestions for features for std/log are more than welcome! If you guys have any, feel free to open a GitHub issue.