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--- | ||
title: Rust | ||
author: Matthias Beyer | ||
date: 2017-03-05 | ||
--- | ||
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# User's Guide to the Rust Infrastructure | ||
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To install the rust compiler and cargo put | ||
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``` | ||
rustStable.rustc | ||
rustStable.cargo | ||
``` | ||
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into the `environment.systemPackages` or bring them into scope with | ||
`nix-shell -p rustStable.rustc -p rustStable.cargo`. | ||
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There are also `rustBeta` and `rustNightly` package sets available. | ||
These are not updated very regulary. For daily builds see | ||
[Using the Rust nightlies overlay](#using-the-rust-nightlies-overlay) | ||
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## Packaging Rust applications | ||
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Rust applications are packaged by using the `buildRustPackage` helper from `rustPlatform`: | ||
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``` | ||
with rustPlatform; | ||
buildRustPackage rec { | ||
name = "ripgrep-${version}"; | ||
version = "0.4.0"; | ||
src = fetchFromGitHub { | ||
owner = "BurntSushi"; | ||
repo = "ripgrep"; | ||
rev = "${version}"; | ||
sha256 = "0y5d1n6hkw85jb3rblcxqas2fp82h3nghssa4xqrhqnz25l799pj"; | ||
}; | ||
depsSha256 = "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; | ||
}; | ||
} | ||
``` | ||
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`buildRustPackage` requires a `depsSha256` 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. | ||
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To install crates with nix there is also an experimental project called | ||
[nixcrates](https://github.com/fractalide/nixcrates). | ||
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## Using the Rust nightlies overlay | ||
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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. | ||
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To use this overlay, clone | ||
[nixpkgs-mozilla](https://github.com/mozilla/nixpkgs-mozilla), | ||
and create a symbolic link to the file | ||
[rust-overlay.nix](https://github.com/mozilla/nixpkgs-mozilla/blob/master/rust-overlay.nix) | ||
in the `~/.config/nixpkgs/overlays` directory. | ||
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$ git clone https://github.com/mozilla/nixpkgs-mozilla.git | ||
$ mkdir -p ~/.config/nixpkgs/overlays | ||
$ ln -s $(pwd)/nixpkgs-mozilla/rust-overlay.nix ~/.config/nixpkgs/overlays/rust-overlay.nix | ||
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The latest version can be installed with the following command: | ||
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$ nix-env -Ai nixos.rustChannels.stable.rust | ||
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Or using the attribute with nix-shell: | ||
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$ nix-shell -p nixos.rustChannels.stable.rust | ||
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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. | ||
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The overlay automatically updates itself as it uses the same source as | ||
[rustup](https://www.rustup.rs/). |