Can't set loglevel of subsystems properly

[RobQuistNL]

I have a package that has a lot of subpackages. The loggers get initialized like this for each package;

var log = log2.Logger("hwdata:cli")
var log = log2.Logger("hwdata:system")
var log = log2.Logger("hwdata:cpu")

When I include this project into another project, I want to set all the loglevels of this subsystem to info;

GOLOG_LOG_LEVEL="debug,hwdata=info" go run .

This doesn't work. It still shows hwdata:cpu with level debug.
Then I tried the "regex" setup that was described in the readme.md;

GOLOG_LOG_LEVEL="debug,hwdata:.*=info" go run .

This also doesn't work

I now have to write it like this;

GOLOG_LOG_LEVEL="debug,hwdata:cpu=info,hwdata:system=info,hwdata:cli=info" go run .

which is kind of ineffective, especially since I have about 20 of those subsystems. Shouldn't this just work on a subsystem level basis? Or is the ":" that is mentioned in the readme just arbitrary and doesn't it work with subsystems like that at all?

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[gammazero]

The ":" is not a delimiter for a separate subsystem, it is part of the subsystem name in the examples. In your use case, hwdata:cli, hwdata:system, and hwdata:cpu are the separate subsystems.

[RobQuistNL]

I think it works like this in the Lotus CLI.
The documentation also explains the use of the regex; https://github.com/ipfs/go-log?tab=readme-ov-file#usage

Would this be a nice feature to add?

[gammazero]

Setting log levels and using a regex to match logger names is supported by the SetLogLevelRegex API, but is not available in the GOLOG_LOG_LEVEL environ variable.

Being able to detect the presence of a regex in the value of GOLOG_LOG_LEVEL, and then match against the regex when setting up log subsystems, would be a nice feature.