2017-03-20 19:41:37 +00:00
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---
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title: Rust
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author: Matthias Beyer
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date: 2017-03-05
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---
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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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```
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rustStable.rustc
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rustStable.cargo
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```
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into the `environment.systemPackages` or bring them into scope with
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`nix-shell -p rustStable.rustc -p rustStable.cargo`.
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There are also `rustBeta` and `rustNightly` package sets available.
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2017-09-01 18:38:07 +01:00
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These are not updated very regularly. For daily builds use either rustup from
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2017-04-15 11:36:29 +01:00
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nixpkgs or use the [Rust nightlies overlay](#using-the-rust-nightlies-overlay).
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2017-03-20 19:41:37 +00:00
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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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```
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with rustPlatform;
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buildRustPackage rec {
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name = "ripgrep-${version}";
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version = "0.4.0";
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src = fetchFromGitHub {
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owner = "BurntSushi";
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repo = "ripgrep";
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rev = "${version}";
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sha256 = "0y5d1n6hkw85jb3rblcxqas2fp82h3nghssa4xqrhqnz25l799pj";
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};
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depsSha256 = "0q68qyl2h6i0qsz82z840myxlnjay8p1w5z7hfyr8fqp7wgwa9cx";
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meta = with stdenv.lib; {
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description = "A utility that combines the usability of The Silver Searcher with the raw speed of grep";
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homepage = https://github.com/BurntSushi/ripgrep;
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license = with licenses; [ unlicense ];
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maintainers = [ maintainers.tailhook ];
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platforms = platforms.all;
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};
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}
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```
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`buildRustPackage` requires a `depsSha256` attribute which is computed over
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all crate sources of this package. Currently it is obtained by inserting a
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fake checksum into the expression and building the package once. The correct
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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
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[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.
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This overlay can _also_ be used to install recent unstable or stable versions
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of Rust, if desired.
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To use this overlay, clone
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[nixpkgs-mozilla](https://github.com/mozilla/nixpkgs-mozilla),
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and create a symbolic link to the file
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[rust-overlay.nix](https://github.com/mozilla/nixpkgs-mozilla/blob/master/rust-overlay.nix)
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in the `~/.config/nixpkgs/overlays` directory.
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$ git clone https://github.com/mozilla/nixpkgs-mozilla.git
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2017-03-20 19:59:43 +00:00
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$ mkdir -p ~/.config/nixpkgs/overlays
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2017-03-20 19:41:37 +00:00
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$ 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
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"nightly" or "beta", or
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use the function provided by this overlay to pull a version based on a
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build date.
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The overlay automatically updates itself as it uses the same source as
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[rustup](https://www.rustup.rs/).
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