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154 lines
5.1 KiB
154 lines
5.1 KiB
# rust-overlay
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*Pure and reproducible* overlay for binary distributed rust toolchains.
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A compatible but better replacement for rust overlay of [mozilla/nixpkgs-mozilla][mozilla].
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Hashes of toolchain components are pre-fetched (and compressed) in tree (`manifests` directory),
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so the evaluation is *pure* and no need to have network (but [nixpkgs-mozilla][mozilla] does).
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It also works well with [Nix Flakes](https://nixos.wiki/wiki/Flakes).
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- The toolchain hashes are auto-updated daily using GitHub Actions.
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- Current oldest supported version is stable 1.29.0 and nightly 2018-09-13
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(which is randomly chosen).
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## Use as a classic Nix overlay
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You can put the code below into your `~/.config/nixpkgs/overlays.nix`.
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```nix
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[ (import (builtins.fetchTarball "https://github.com/oxalica/rust-overlay/archive/master.tar.gz")) ]
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```
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Then the provided attribute paths are available in nix command.
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```bash
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$ nix-env -iA rust-bin.stable.latest.rust # Do anything you like.
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```
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Alternatively, you can install it into nix channels.
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```bash
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$ nix-channel --add https://github.com/oxalica/rust-overlay/archive/master.tar.gz rust-overlay
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$ nix-channel --update
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```
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And then feel free to use it anywhere like
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`import <nixpkgs> { overlays = [ (import <rust-overlay>) ]; }` in your nix shell environment.
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## Use with Nix Flakes
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This repository already has flake support.
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NOTE: **Only the output `overlay` is stable and preferred to be used in your flake.**
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Other outputs like `packages` and `defaultPackage` are for human try and are subject to change.
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For a quick play, just use `nix shell` to bring the latest stable rust toolchain into scope.
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(All commands below requires preview version of Nix with flake support.)
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```shell
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$ nix shell github:oxalica/rust-overlay
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$ rustc --version
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rustc 1.49.0 (e1884a8e3 2020-12-29)
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$ cargo --version
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cargo 1.49.0 (d00d64df9 2020-12-05)
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```
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Here's an example of using it in nixos configuration.
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```nix
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{
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description = "My configuration";
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inputs = {
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nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
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rust-overlay.url = "github:oxalica/rust-overlay";
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};
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outputs = { nixpkgs, rust-overlay, ... }: {
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nixosConfigurations = {
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hostname = nixpkgs.lib.nixosSystem {
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system = "x86_64-linux";
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modules = [
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./configuration.nix # Your system configuration.
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({ pkgs, ... }: {
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nixpkgs.overlays = [ rust-overlay.overlay ];
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environment.systemPackages = [ pkgs.rust-bin.stable.latest.rust ];
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})
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];
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};
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};
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};
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}
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```
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## Attributes provided by the overlay
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```nix
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{
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rust-bin = {
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# The default dist url for fetching.
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# Override it if you want to use a mirror server.
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distRoot = "https://static.rust-lang.org/dist";
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# Select a toolchain and aggregate components by rustup's `rust-toolchain` file format.
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# See: https://github.com/ebroto/rustup/blob/c2db7dac6b38c99538eec472db9d23d18f918409/README.md#the-toolchain-file
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fromRustupToolchain = { channel, components ? [], targets ? [] }: «derivation»;
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# Same as `fromRustupToolchain` but read from a `rust-toolchain` file (legacy one-line string or in TOML).
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fromRustupToolchainFile = rust-toolchain-file-path: «derivation»;
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stable = {
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# The latest stable toolchain.
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latest = {
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# Aggregate all default components. (recommended)
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rust = «derivation»;
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# Individial components.
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rustc = «derivation»;
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cargo = «derivation»;
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rust-std = «derivation»;
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# ... other components
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};
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"1.49.0" = { /* toolchain */ };
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"1.48.0" = { /* toolchain */ };
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# ... other versions.
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};
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nightly = {
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# The latest nightly toolchain.
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latest = { /* toolchain */ };
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"2020-12-31" = { /* toolchain */ };
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"2020-12-30" = { /* toolchain */ };
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# ... other versions.
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};
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# ... Some internal attributes omitted.
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};
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# These are for compatibility with nixpkgs-mozilla and
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# provide same toolchains as `rust-bin.*`.
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latest.rustChannels = /* ... */;
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rustChannelOf = /* ... */;
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rustChannelOfTargets = /* ... */;
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rustChannels = /* ... */;
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}
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```
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Some examples (assume `nixpkgs` had the overlay applied):
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- Latest stable rust with all default components:
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`nixpkgs.rust-bin.stable.latest.rust`
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- Latest nightly rust with all default components:
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`nixpkgs.rust-bin.nightly.latest.rust`
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- A specific version of stable rust:
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`nixpkgs.rust-bin.stable."1.48.0".rust`
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- A specific date of nightly rust:
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`nixpkgs.rust-bin.nightly."2020-12-31".rust`
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- Latest stable rust with additional component `rust-src` and extra target
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`arm-unknown-linux-gnueabihf`:
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```nix
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nixpkgs.rust-bin.stable.latest.rust.override {
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extensions = [ "rust-src" ];
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targets = [ "arm-unknown-linux-gnueabihf" ];
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}
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```
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For detail about `override` , see the source code of `./rust-overlay.nix`,
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or README of [nixpkgs-mozilla][mozilla].
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[mozilla]: https://github.com/mozilla/nixpkgs-mozilla
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