1647408 - Rust logs in Firefox Desktop are now available via MOZ_LOG

Status: RESOLVED FIXED

(Data Platform and Tools :: Glean: SDK, defect)

Description

[Chris H-C :chutten]

Maybe we should take a look at how MOZ_LOG compares to RUST_LOG? And update the documentation.

Comment 1

[Chris H-C :chutten]

Valentin's email announcing MOZ_LOG support isn't clear on how a RUST_LOG user might adapt their workflow, so I might miss something here. But I have the mdn article on gecko logging open, so that ought to help.

It seems from my testing that RUST_LOG="fog=trace,glean_core=trace" ./mach run can be most closely emulated with MOZ_LOG="timestamp,fog::*:5,glean_core::*:5" (though we lose terminal colours). On the plus side, at runtime you can configure the same thing by opening up about:config and setting preferences logging.fog::* to 5 and logging.glean_core::* to 5 and logging.config.timestamp to true.

Lemme work up a doc patch.

Comment 2

[Chris H-C :chutten]

Attachment: Bug 1647408 - Update FOG logging info for MOZ_LOG support r?janerik!

Comment 3

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/efac09e1e604
Update FOG logging info for MOZ_LOG support r=janerik

Comment 4

[Natalia Csoregi [:nataliaCs]]

https://hg.mozilla.org/mozilla-central/rev/efac09e1e604