feat: Multiple configurations

[RayPS]

If I understand correctly, only a single configuration file can be stored in $PWD or $HOME currently.
The only way to maintain and use different configurations is to store them separately in different directory and switch them by changing PWD. Not to mention having a different configuration in the same directory.

I hope there is an option to let us specify the path of configuration file and always having the higher priority than $PWD and $HOME. So in concept:

jlv access-log.json --conf view2.jlv.jsonc

Or maybe having a different configuration in a single file? In case of not breaking current format:

{
    fields: [], // default
    another_fields: [],
    different_fields: [],
    more_fields: [],
    blahblah: []
}

[hedhyw]

Hello, thanks for the feature request!

It's a good idea with a config flag!

• jlv -c custom_config.json app.log
• jlv --config custom_config.json app.log

We can pass it to

json-log-viewer/cmd/jlv/main.go

Line 41 in d1b9829

func readConfig() (*config.Config, error) {