crate2nix VS crates.io-index

I'll use nixpkgs' buildRustPackage. There's a few other tools, my favorite being crate2nix, but we'll leave that to a future tutorial.

If you want to iterate with nix instead of cargo, crate2nix and cargo2nix provides more caching and more fine control over your dependencies. I haven't used these two so you would have to decide for yourself. You may also want to try out nocargo for something more experimental.

I'm yet to try it out, but from the blog post, the README and the source it appears that Crane builds all dependencies in one derivation (separately from the main crate). This means that if a dependency gets added, removed or changed, all dependencies of a crate will be rebuilt. This is in contrast with https://github.com/kolloch/crate2nix, which does build every dependency in a separate package, thus you don't need to rebuild other dependencies if you only change a small part of the tree.

Yes, you will have to package it if it's not already in nixpkgs.

The good news is once you learn how, it's basically trivial with crate2nix[0], which can autogenerate nix derivations from rust crates

[0] https://github.com/kolloch/crate2nix

From my quick reading of cargo2nix's webpage yes. https://github.com/kolloch/crate2nix has a workspaces section.

As for your two applications, they're both written in Rust, and I like https://github.com/kolloch/crate2nix as a way to package Rust crates with Nix. BTW, wezterm is already in nixpkgs!

I like the way crate2nix works. I have made a flake template for it here. Sometimes it requires a couple of overrides to fix some misbehaving crates (see https://github.com/balsoft/simple-osd-daemons/blob/master/flake.nix#L29 for an example of such overrides), but otherwise it's fantastic. It doesn't require any hash nonsense, it downloads and builds all the crates separately (unlike naersk or other solutions) so you get all the benefits of Nix (reproducibility and proper caching).

Crate2nix might help: https://github.com/kolloch/crate2nix

That's already prevented by the checksum which is present for all crate versions in the registry index, which is set in stone on publish and verified by cargo on download. See e.g. https://github.com/rust-lang/crates.io-index/blob/74f1b1e064...

Why is the crates.io registry Git repository structured the way it is? https://github.com/rust-lang/crates.io-index

# $HOME/.cargo/config.toml [...] [registry] default = "gitea" [registries.crates] index = "https://github.com/rust-lang/crates.io-index.git" [registries.gitea] index = "https://gitea.localhost.local/user/_cargo-index.get" [...]

[[package]] name = "cbindgen" version = "0.24.3" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "a6358dedf60f4d9b8db43ad187391afe959746101346fe51bb978126bec61dfb" dependencies = [ "clap 3.2.23", "heck", "indexmap", "log", "proc-macro2", "quote", "serde", "serde_json", "syn 1.0.109", "tempfile", "toml 0.5.11", ]

$ cargo upgrade --dry-run --compatible ignore --incompatible allow --pinned ignore --verbose 2>&1 Updating 'https://github.com/rust-lang/crates.io-index' index Checking foo's dependencies name old req compatible latest new req note ==== ======= ========== ====== ======= ==== axum 0.6.11 0.6.15 0.6.15 0.6.11 compatible base64 0.20.0 0.20.0 0.21.0 0.21.0 ...

I am getting: spurious network error (2 tries remaining): unexpected http status code: 503; class=Http Caused by: failed to fetch https://github.com/rust-lang/crates.io-index

https://github.com/rust-lang/crates.io-index contains the entire crates.io index with the names of all crates and their dependencies. grep or ripgrep over that should do the job.

[[package]] name = "spade" version = "2.1.0" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "1190e0e8f4eb17fc3dbb2d20e1142676e56aaac3daede39f64a3302d687b80f3" dependencies = [ "num-traits", "optional", "robust 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)", "smallvec", ]

Caused by: process didn't exit successfully: git fetch --force --update-head-ok 'https://github.com/rust-lang/crates.io-index' '+HEAD:refs/remotes/origin/HEAD' (exit status: 128) --- stderr error: 2747 bytes of body are still expected fetch-pack: unexpected disconnect while reading sideband packet fatal: early EOF fatal: fetch-pack: invalid index-pack output