The setup is now as follows:
- All user-facing logging goes through `tracing` at an `info` leve.
(This excludes messages that go to `stdout`, like the compiled
`requirements.txt` file.)
- We have `--quiet` and `--verbose` command-line flags to set the
tracing filter and format defaults. So if you use `--verbose`, we
include timestamps and targets, and filter at `puffin=debug` level.
- However, we always respect `RUST_LOG`. So you can override the
_filter_ via `RUST_LOG`.
For example: the standard setup filters to `puffin=info`, and doesn't
show timestamps or targets:
<img width="1235" alt="Screen Shot 2023-10-08 at 3 41 22 PM"
src="54ca4db6-c66a-439e-bfa3-b86dee136e45">
If you run with `--verbose`, you get debug logging, but confined to our
crates:
<img width="1235" alt="Screen Shot 2023-10-08 at 3 41 57 PM"
src="c5c1af11-7f7a-4038-a173-d9eca4c3630b">
If you want verbose logging with _all_ crates, you can add
`RUST_LOG=debug`:
<img width="1235" alt="Screen Shot 2023-10-08 at 3 42 39 PM"
src="0b5191f4-4db0-4db9-86ba-6f9fa521bcb6">
I think this is a reasonable setup, though we can see how it feels and
refine over time.
Closes https://github.com/astral-sh/puffin/issues/57.
