Building a Rust package

[Hauke Fath <hf%spg.tu-darmstadt.de@localhost>]

Hi,

I am trying to update a rust-based package, and I don't really know my 
way around rust's newfangled build system. And there are problems.

While packaging security/vaultwarden (1.25.2), the rust part didn't pose 
any major difficulties. But the 1.26.0 release patches a rust crate, 
which the pkgsrc contraptions apparently don't deal with.

After the prescribed

[hf@Gstoder] /<2>security/vaultwarden > make CARGO_ARGS="build --release 
--features `make show-var VARNAME=CARGO_FEATURES`" build

(which fails unless the --features option is provided - I guess that 
could be a target in "lang/rust/cargo.mk"?) to update 
"cargo-depends.mk", the actual package build ends quickly with

[...]
===> Building for vaultwarden-1.26.0
error: failed to load source for dependency `multer`

Caused by:
  Unable to update 
https://github.com/BlackDex/multer-rs?rev=477d16b7fa0f361b5c2a5ba18a5b28bec6d26a8a#477d16b7

Caused by:
  can't checkout from 'https://github.com/BlackDex/multer-rs': you are 
in the offline mode (--offline)
*** Error code 101

Stop.
make[1]: stopped in /amd/hochstuhl/u/pkgsrc/security/vaultwarden
*** Error code 1


The package's "Cargo.toml" has a

[patch.crates-io]
# Using a patched version of multer-rs (Used by Rocket) to fix 
attachment/send file uploads
# Issue: https://github.com/dani-garcia/vaultwarden/issues/2644
# Patch: 
https://github.com/BlackDex/multer-rs/commit/477d16b7fa0f361b5c2a5ba18a5b28bec6d26a8a
multer = { git = "https://github.com/BlackDex/multer-rs";, rev = 
"477d16b7fa0f361b5c2a5ba18a5b28bec6d26a8a" }

section, and I suppose that patch is not recorded in the package's 
"cargo-depends.mk".

Which way forward?

Cheerio,
Hauke

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