- arti#445 highlighted the lack of good documentation around Arti's
multiple runtime support, as well as it being difficult to determine
what runtime was actually in use.
- Improve the documentation to solve the first problem.
- To solve the second problem, make Runtime require Debug (which is
arguably a good idea anyway, since it makes them easier to embed in
things), and print out the current runtime's Debug information when
arti is invoked with `--version`.
- (It also prints out other Cargo features, too!)
fixes arti#445
Our support policy says that we can update to any Rust released at
least 6 months ago; 1.56 came out on 21 October 2021.
This doesn't yet change any code: it just increases the version
we say we need in our README, and the version we test against in
CI.
Our main justification for this change is to be able to upgrade to
newer versions of our dependencies, including `async_executors` >=
0.5, `aes` >= 0.8, and `cipher` >= 0.4.
This switches out `arti`'s argument-parsing library with `clap`, which
is a lot more featureful (and very widely used within the Rust
ecosystem). We also now use a lot of `clap`'s features to improve the
CLI experience:
- The CLI now expects a subcommand (currently, either "help", or "proxy"
for the existing SOCKS proxy behaviour). This should let us add
additional non-SOCKS-proxy features to arti in future.
- `clap` supports default values determined at runtime, so the way the
default config file is loaded was changed: now, we determine the
OS-specific path for said file before invoking `clap`, so the help
command can show it properly.
- The behaviour of `tor_config` was also changed; now, one simply
specifies a list of configuration files to load, together with
whether they're required.
- That function also way overused generics; this has been fixed.
- Instead of using the ARTI_LOG environment variable to configure
logging, one now uses the `-l, --log-level` CLI option.
(The intent is for this option to be more discoverable by users.)
- The `proxy` subcommand allows the user to override the SOCKS port used
on the CLI without editing the config file.
Part of this "declaring milestone 2 done" business is a matter of
putting additional tests and documentation into milestone 3 where
they logically belong.
Nick Mathewson
Ian Jackson
Dimitris Apostolou
Emil Engler
eta
Samanta Navarro
David Goulet
George Kadianakis