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flake.nix
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flake.nix
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{
description = ''
Pure and reproducible overlay for binary distributed rust toolchains.
A compatible but better replacement for rust overlay of github:mozilla/nixpkgs-mozilla.
'';
inputs = {
nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
flake-utils.url = "github:numtide/flake-utils";
};
outputs = { self, nixpkgs, flake-utils }: let
inherit (nixpkgs.lib)
elem filter filterAttrs head mapAttrs' mapAttrsToList optionalAttrs replaceStrings;
overlay = import ./.;
allSystems = [
"aarch64-linux"
"armv6l-linux"
"armv7a-linux"
"armv7l-linux"
"x86_64-linux"
"x86_64-darwin"
"aarch64-darwin"
];
in {
overlay = final: prev: overlay final prev;
} // flake-utils.lib.eachSystem allSystems (system: let
pkgs = import nixpkgs { inherit system; overlays = [ overlay ]; };
in rec {
# `defaultApp`, `defaultPackage` and `packages` are for human only.
# They are subject to change and **DO NOT** depend on them in your flake.
# Please use `overlay` instead.
defaultApp = {
type = "app";
program = "${defaultPackage}/bin/rustc";
};
defaultPackage = packages.rust;
packages = let
inherit (builtins) tryEval;
defaultPkg = comps:
if comps ? default then
if (tryEval comps.default.drvPath).success then
comps.default
else if (tryEval comps.minimal.drvPath).success then
comps.minimal
else
null
else if (tryEval comps.rust.drvPath).success then
comps.rust
else
null;
result =
mapAttrs' (version: comps: {
name = "rust-${replaceStrings ["."] ["-"] version}";
value = defaultPkg comps;
}) pkgs.rust-bin.stable //
mapAttrs' (version: comps: {
name = "rust-nightly-${version}";
value = defaultPkg comps;
}) pkgs.rust-bin.nightly //
mapAttrs' (version: comps: {
name = "rust-beta-${version}";
value = defaultPkg comps;
}) pkgs.rust-bin.beta //
{
rust = result.rust-latest;
rust-nightly = result.rust-nightly-latest;
rust-beta = result.rust-beta-latest;
};
in filterAttrs (name: drv: drv != null) result;
checks = let
inherit (pkgs) rust-bin rustChannelOf;
inherit (pkgs.rust-bin) fromRustupToolchain fromRustupToolchainFile stable beta nightly;
rustTarget = pkgs.rust.toRustTarget pkgs.hostPlatform;
assertEq = lhs: rhs: {
assertion = lhs == rhs;
message = "`${lhs}` != `${rhs}`";
};
assertUrl = drv: url: let
srcUrl = head drv.src.urls;
in assertEq srcUrl url;
assertions = {
url-no-arch = assertUrl stable."1.48.0".rust-src "https://static.rust-lang.org/dist/2020-11-19/rust-src-1.48.0.tar.xz";
url-kind-nightly = assertUrl nightly."2021-01-01".rustc "https://static.rust-lang.org/dist/2021-01-01/rustc-nightly-${rustTarget}.tar.xz";
url-kind-beta = assertUrl beta."2021-01-01".rustc "https://static.rust-lang.org/dist/2021-01-01/rustc-beta-${rustTarget}.tar.xz";
# Check only tier 1 targets.
} // optionalAttrs (elem system [ "aarch64-linux" "x86_64-linux" ]) {
name-stable = assertEq stable."1.48.0".rustc.name "rustc-1.48.0";
name-beta = assertEq beta."2021-01-01".rustc.name "rustc-1.50.0-beta.2-2021-01-01";
name-nightly = assertEq nightly."2021-01-01".rustc.name "rustc-1.51.0-nightly-2021-01-01";
name-stable-profile-default = assertEq stable."1.51.0".default.name "rust-default-1.51.0";
name-stable-profile-minimal = assertEq stable."1.51.0".minimal.name "rust-minimal-1.51.0";
url-kind-2 = assertUrl stable."1.48.0".cargo "https://static.rust-lang.org/dist/2020-11-19/cargo-1.48.0-${rustTarget}.tar.xz";
url-kind-0 = assertUrl stable."1.47.0".cargo "https://static.rust-lang.org/dist/2020-10-08/cargo-0.48.0-${rustTarget}.tar.xz";
url-kind-1 = assertUrl stable."1.34.2".llvm-tools-preview "https://static.rust-lang.org/dist/2019-05-14/llvm-tools-1.34.2%20(6c2484dc3%202019-05-13)-${rustTarget}.tar.xz";
url-fix = assertUrl nightly."2019-01-10".rustc "https://static.rust-lang.org/dist/2019-01-10/rustc-nightly-${rustTarget}.tar.xz";
rename-available = assertEq stable."1.48.0".rustfmt stable."1.48.0".rustfmt-preview;
rename-unavailable = {
assertion = !(stable."1.30.0" ? rustfmt);
message = "1.30.0 has rustfmt still in preview state";
};
latest-stable-legacy = assertEq pkgs.latest.rustChannels.stable.rustc stable.latest.rustc;
latest-beta-legacy = assertEq pkgs.latest.rustChannels.beta.rustc beta.latest.rustc;
latest-nightly-legacy = assertEq pkgs.latest.rustChannels.nightly.rustc nightly.latest.rustc;
rust-channel-of-stable = assertEq (rustChannelOf { channel = "stable"; }).rustc stable.latest.rustc;
rust-channel-of-beta = assertEq (rustChannelOf { channel = "beta"; }).rustc beta.latest.rustc;
rust-channel-of-nightly = assertEq (rustChannelOf { channel = "nightly"; }).rustc nightly.latest.rustc;
rust-channel-of-version = assertEq (rustChannelOf { channel = "1.48.0"; }).rustc stable."1.48.0".rustc;
rust-channel-of-nightly-date = assertEq (rustChannelOf { channel = "nightly"; date = "2021-01-01"; }).rustc nightly."2021-01-01".rustc;
rust-channel-of-beta-date = assertEq (rustChannelOf { channel = "beta"; date = "2021-01-01"; }).rustc beta."2021-01-01".rustc;
rustup-toolchain-stable = assertEq (fromRustupToolchain { channel = "stable"; }) stable.latest.default;
rustup-toolchain-beta = assertEq (fromRustupToolchain { channel = "beta"; }) beta.latest.default;
# rustup-toolchain-nightly = assertEq (fromRustupToolchain { channel = "nightly"; }) nightly.latest.default; # Not always available
rustup-toolchain-version = assertEq (fromRustupToolchain { channel = "1.51.0"; }) stable."1.51.0".default;
rustup-toolchain-nightly-date = assertEq (fromRustupToolchain { channel = "nightly-2021-01-01"; }) nightly."2021-01-01".default;
rustup-toolchain-beta-date = assertEq (fromRustupToolchain { channel = "beta-2021-01-01"; }) beta."2021-01-01".default;
rustup-toolchain-customization = assertEq
(fromRustupToolchain {
channel = "1.51.0";
components = [ "rustfmt" "rustc-dev" ];
targets = [ "wasm32-unknown-unknown" "aarch64-unknown-linux-gnu" ];
})
(stable."1.51.0".default.override {
extensions = [ "rustfmt" "rustc-dev" ];
targets = [ "wasm32-unknown-unknown" "aarch64-unknown-linux-gnu" ];
});
rustup-toolchain-profile-missing = assertEq (builtins.tryEval (fromRustupToolchain { channel = "1.51.0"; profile = "non_existent"; })).success false;
rustup-toolchain-profile-too-early = assertEq (builtins.tryEval (fromRustupToolchain { channel = "1.29.0"; profile = "minimal"; })).success false;
rustup-toolchain-profile-fallback = assertEq (fromRustupToolchain { channel = "1.29.0"; }) stable."1.29.0".rust;
rustup-toolchain-file-toml = assertEq
(fromRustupToolchainFile ./tests/rust-toolchain-toml)
(nightly."2021-03-25".default.override {
extensions = [ "rustfmt" "rustc-dev" ];
targets = [ "wasm32-unknown-unknown" "aarch64-unknown-linux-gnu" ];
});
rustup-toolchain-file-legacy = assertEq
(fromRustupToolchainFile ./tests/rust-toolchain-legacy)
nightly."2021-03-25".default;
rustup-toolchain-file-minimal = assertEq
(fromRustupToolchainFile ./tests/rust-toolchain-minimal)
(nightly."2021-03-25".minimal.override {
extensions = [ "rustfmt" "rustc-dev" ];
targets = [ "aarch64-unknown-linux-gnu" ];
});
};
checkDrvs = optionalAttrs (elem system [ "aarch64-linux" "x86_64-linux" ]) {
latest-nightly-default = rust-bin.selectLatestNightlyWith (toolchain: toolchain.default);
};
failedAssertions =
filter (msg: msg != null) (
mapAttrsToList
(name: { assertion, message }: if assertion
then null
else "Assertion `${name}` failed: ${message}\n")
assertions);
in if failedAssertions == []
then checkDrvs
else throw (builtins.toString failedAssertions);
});
}