Add debug/verbose logging about pyflow

[hms5232]

Leaving open to discuss logging.

I have same problem #139 and cmd show following info:

Found lockfile
thread 'main' panicked at 'Can't find a valid version for charset-normalizer', src\dep_resolution.rs:396:40
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

Because I don't familiar with Rust, fail to show trace about this problem after attempting RUST_BACKTRACE=1 (tested on Windows 10).

In conclusion, I think that we should add some flag (like -v, -vv, -vvv, --debug, --show-backtrace or something else) to show backtrace and debug info. This can help user locate problem, and solve or report what they occurred.

[David-OConnor]

This certainly could be a bug; you're doing nothing wrong. Could you please post the [tool.pyflow.dependencies] section of pyproject.toml ?

[ciarancourtney]

I doubt its a toml issue (unless it is..) you can recreate with in blank dir with:

pyflow init
pyflow install black

I'll try it out later on win/linux without msys

[David-OConnor]

Great. Are you able to install other dependencies?

Top pri: Fixing this error.
Secondary: Adding verbose logging. A quick option would be to replace the red error messages with full panic dumps. A more robust solution would be deliberately choosing what info to show at each failure point.

I'm leaning towards this being an error with the pydeps cache, but am curious why I can't reproduce.

[David-OConnor]

Third option I like more: Once we knock out the bugs and get things running smooth, I think there's a relatively small surface error of failure points; may be able to just make these errors very descriptive and suggest fixes - it no PCLOADLETTERs, and no exposed panics. use custom-written error messages (ie the red text that shows from util::abort) vice expect to the max extent.

[ciarancourtney]

Apologies, it was package related, assumed it was any package because bad package was in pyproject.yml all along, opened #16

[David-OConnor]

Leaving open to discuss logging.