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The biggest benefit is that we no longer have to update the registry package. This means that just about any cargo package can be built by nix. No longer does `cargo update` need to be feared because it will update to packages newer then what is available in nixpkgs. Instead of fetching the cargo registry this bundles all the source code into a "vendor/" folder. This also uses the new --frozen and --locked flags which is nice. Currently cargo-vendor only provides binaries for Linux and macOS 64-bit. This can be solved by building it for the other architectures and uploading it somewhere (like the NixOS cache). This also has the downside that it requires a change to everyone's deps hash. And if the old one is used because it was cached it will fail to build as it will attempt to use the old version. For this reason the attribute has been renamed to `cargoSha256`. Authors: * Kevin Cox <kevincox@kevincox.ca> * Jörg Thalheim <Mic92@users.noreply.github.com> * zimbatm <zimbatm@zimbatm.com>
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| title | author | date |
|---|---|---|
| Rust | Matthias Beyer | 2017-03-05 |
User's Guide to the Rust Infrastructure
To install the rust compiler and cargo put
rust
into the environment.systemPackages or bring them into
scope with nix-shell -p rust.
For daily builds (beta and nightly) use either rustup from nixpkgs or use the Rust nightlies overlay.
Packaging Rust applications
Rust applications are packaged by using the buildRustPackage helper from rustPlatform:
with rustPlatform;
buildRustPackage rec {
name = "ripgrep-${version}";
version = "0.4.0";
src = fetchFromGitHub {
owner = "BurntSushi";
repo = "ripgrep";
rev = "${version}";
sha256 = "0y5d1n6hkw85jb3rblcxqas2fp82h3nghssa4xqrhqnz25l799pj";
};
cargoSha256 = "0q68qyl2h6i0qsz82z840myxlnjay8p1w5z7hfyr8fqp7wgwa9cx";
meta = with stdenv.lib; {
description = "A utility that combines the usability of The Silver Searcher with the raw speed of grep";
homepage = https://github.com/BurntSushi/ripgrep;
license = with licenses; [ unlicense ];
maintainers = [ maintainers.tailhook ];
platforms = platforms.all;
};
}
buildRustPackage requires a cargoSha256 attribute which is computed over
all crate sources of this package. Currently it is obtained by inserting a
fake checksum into the expression and building the package once. The correct
checksum can be then take from the failed build.
To install crates with nix there is also an experimental project called nixcrates.
Using the Rust nightlies overlay
Mozilla provides an overlay for nixpkgs to bring a nightly version of Rust into scope. This overlay can also be used to install recent unstable or stable versions of Rust, if desired.
To use this overlay, clone
nixpkgs-mozilla,
and create a symbolic link to the file
rust-overlay.nix
in the ~/.config/nixpkgs/overlays directory.
$ git clone https://github.com/mozilla/nixpkgs-mozilla.git
$ mkdir -p ~/.config/nixpkgs/overlays
$ ln -s $(pwd)/nixpkgs-mozilla/rust-overlay.nix ~/.config/nixpkgs/overlays/rust-overlay.nix
The latest version can be installed with the following command:
$ nix-env -Ai nixos.latest.rustChannels.stable.rust
Or using the attribute with nix-shell:
$ nix-shell -p nixos.latest.rustChannels.stable.rust
To install the beta or nightly channel, "stable" should be substituted by "nightly" or "beta", or use the function provided by this overlay to pull a version based on a build date.
The overlay automatically updates itself as it uses the same source as rustup.