Support for sharing vendor directory between multiple projects (--sync from cargo-vendor)

[JackWolfard]

cargo vendor supports --sync parameter:

$ cargo vendor --help | rg sync
    -s, --sync <TOML>            Additional `Cargo.toml` to sync and vendor

With this parameter, multiple projects can share the same vendor directory. One complication could be if users want projects which have different platforms but overlapping dependencies to share a directory (#44).

I am willing to contribute this feature.

[cgwalters]

In general I think we should aim to be a drop-in replacement for cargo vendor, so every feature like this makes sense to me.

One complication could be if users want projects which have different platforms but overlapping dependencies to share a directory (#44).

We should just take the union of the filters, right?

I am willing to contribute this feature.

Cool! Feel free to push a "WIP" style pull request and I'm happy to help review and merge!

[kgrech]

Thanks @JackWolfard, I also need quite this urgently and I am happy to contribute it as well. When would you have time to work on it? Let me know if you need help with it.

[kgrech]

We should just take the union of the filters, right?

I wish cargo metadata would just have -sync as well, but it does not :(

[JackWolfard]

Thanks @JackWolfard, I also need quite this urgently and I am happy to contribute it as well. When would you have time to work on it? Let me know if you need help with it.

I plan to work on it today. Once I open a PR, we can have further discussion there. If you need it quicker than that, feel free to start on it.

[kgrech]

It is totally fine. HUGE thanks for taking care of it!