{ description = "Jujutsu VCS, a Git-compatible DVCS that is both simple and powerful"; inputs = { # For listing and iterating nix systems flake-utils.url = "github:numtide/flake-utils"; nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable"; # For installing non-standard rustc versions rust-overlay.url = "github:oxalica/rust-overlay"; rust-overlay.inputs.nixpkgs.follows = "nixpkgs"; }; outputs = { self, nixpkgs, flake-utils, rust-overlay, }: { overlays.default = final: prev: { jujutsu = self.packages.${final.system}.jujutsu; }; } // (flake-utils.lib.eachSystem nixpkgs.lib.systems.flakeExposed (system: let pkgs = import nixpkgs { inherit system; overlays = [ rust-overlay.overlays.default ]; }; # When we're running in the shell, we want to use rustc with a bunch # of extra junk to ensure that rust-analyzer works, clippy etc are all # installed. rustShellToolchain = (pkgs.rust-bin.selectLatestNightlyWith (t: t.default)).override { # NOTE (aseipp): explicitly add rust-src to the rustc compiler only in # devShell. this in turn causes a dependency on the rust compiler src, # which bloats the closure size by several GiB. but doing this here and # not by default avoids the default flake install from including that # dependency, so it's worth it # # relevant PR: https://github.com/rust-lang/rust/pull/129687 extensions = ["rust-src" "rust-analyzer"]; }; # But, whenever we are running CI builds or checks, we want to use a # smaller closure. This reduces the CI impact on fresh clones/VMs, etc. rustMinimalPlatform = let platform = pkgs.rust-bin.selectLatestNightlyWith (t: t.minimal); in pkgs.makeRustPlatform { rustc = platform; cargo = platform; }; in { formatter = pkgs.alejandra; packages = { jujutsu = pkgs.callPackage ./default.nix { rustPlatform = rustMinimalPlatform; gitRev = self.rev or self.dirtyRev or null; }; default = self.packages.${system}.jujutsu; }; checks.jujutsu = self.packages.${system}.jujutsu.overrideAttrs ({...}: { # The default Rust infrastructure runs all builds in the release # profile, which is significantly slower. Run this under the `test` # profile instead, which matches all our other CI systems, Cargo, etc. cargoBuildType = "test"; cargoCheckType = "test"; # By default, `flake check` will want to run the install phase, but # because we override the cargoBuildType, it fails to find the proper # binary. But we don't even care about the binary or even the buildPhase # in this case; just remove them both. buildPhase = "true"; installPhase = "touch $out"; }); devShells.default = let packages = with pkgs; [ rustShellToolchain # Additional tools recommended by contributing.md bacon cargo-deny cargo-insta cargo-nextest # Miscellaneous tools watchman # In case you need to run `cargo run --bin gen-protos` protobuf # For building the documentation website uv # nixos does not work with uv-installed python python3 python3Packages.numpy ]; # on macOS and Linux, use faster parallel linkers that are much more # efficient than the defaults. these noticeably improve link time even for # medium sized rust projects like jj rustLinkerFlags = if pkgs.stdenv.isLinux then ["-fuse-ld=mold" "-Wl,--compress-debug-sections=zstd"] else if pkgs.stdenv.isDarwin then # on darwin, /usr/bin/ld actually looks at the environment variable # $DEVELOPER_DIR, which is set by the nix stdenv, and if set, # automatically uses it to route the `ld` invocation to the binary # within. in the devShell though, that isn't what we want; it's # functional, but Xcode's linker as of ~v15 (not yet open source) # is ultra-fast and very shiny; it is enabled via -ld_new, and on by # default as of v16+ ["--ld-path=$(unset DEVELOPER_DIR; /usr/bin/xcrun --find ld)" "-ld_new"] else []; rustLinkFlagsString = pkgs.lib.concatStringsSep " " (pkgs.lib.concatMap (x: ["-C" "link-arg=${x}"]) rustLinkerFlags); # The `RUSTFLAGS` environment variable is set in `shellHook` instead of `env` # to allow the `xcrun` command above to be interpreted by the shell. shellHook = '' export RUSTFLAGS="-Zthreads=0 ${rustLinkFlagsString}" ''; jujutsu = self.packages.${system}.jujutsu; in pkgs.mkShell { name = "jujutsu"; packages = packages ++ jujutsu.nativeBuildInputs ++ jujutsu.buildInputs; inherit shellHook; }; }));}
{
description = "Jujutsu VCS, a Git-compatible DVCS that is both simple and powerful";
inputs = {
# For listing and iterating nix systems
flake-utils.url = "github:numtide/flake-utils";
nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
# For installing non-standard rustc versions
rust-overlay.url = "github:oxalica/rust-overlay";
rust-overlay.inputs.nixpkgs.follows = "nixpkgs";
};
outputs = {
self,
nixpkgs,
flake-utils,
rust-overlay,
}:
{
overlays.default = final: prev: {
jujutsu = self.packages.${final.system}.jujutsu;
};
}
// (flake-utils.lib.eachSystem nixpkgs.lib.systems.flakeExposed (system: let
pkgs = import nixpkgs {
inherit system;
overlays = [
rust-overlay.overlays.default
];
};
# When we're running in the shell, we want to use rustc with a bunch
# of extra junk to ensure that rust-analyzer works, clippy etc are all
# installed.
rustShellToolchain = (pkgs.rust-bin.selectLatestNightlyWith (t: t.default)).override {
# NOTE (aseipp): explicitly add rust-src to the rustc compiler only in
# devShell. this in turn causes a dependency on the rust compiler src,
# which bloats the closure size by several GiB. but doing this here and
# not by default avoids the default flake install from including that
# dependency, so it's worth it
#
# relevant PR: https://github.com/rust-lang/rust/pull/129687
extensions = ["rust-src" "rust-analyzer"];
};
# But, whenever we are running CI builds or checks, we want to use a
# smaller closure. This reduces the CI impact on fresh clones/VMs, etc.
rustMinimalPlatform =
let platform = pkgs.rust-bin.selectLatestNightlyWith (t: t.minimal);
in pkgs.makeRustPlatform { rustc = platform; cargo = platform; };
in {
formatter = pkgs.alejandra;
packages = {
jujutsu = pkgs.callPackage ./default.nix {
rustPlatform = rustMinimalPlatform;
gitRev = self.rev or self.dirtyRev or null;
};
default = self.packages.${system}.jujutsu;
};
checks.jujutsu = self.packages.${system}.jujutsu.overrideAttrs ({...}: {
# The default Rust infrastructure runs all builds in the release
# profile, which is significantly slower. Run this under the `test`
# profile instead, which matches all our other CI systems, Cargo, etc.
cargoBuildType = "test";
cargoCheckType = "test";
# By default, `flake check` will want to run the install phase, but
# because we override the cargoBuildType, it fails to find the proper
# binary. But we don't even care about the binary or even the buildPhase
# in this case; just remove them both.
buildPhase = "true";
installPhase = "touch $out";
});
devShells.default = let
packages = with pkgs; [
rustShellToolchain
# Additional tools recommended by contributing.md
bacon
cargo-deny
cargo-insta
cargo-nextest
# Miscellaneous tools
watchman
# In case you need to run `cargo run --bin gen-protos`
protobuf
# For building the documentation website
uv
# nixos does not work with uv-installed python
python3
python3Packages.numpy
];
# on macOS and Linux, use faster parallel linkers that are much more
# efficient than the defaults. these noticeably improve link time even for
# medium sized rust projects like jj
rustLinkerFlags =
if pkgs.stdenv.isLinux
then ["-fuse-ld=mold" "-Wl,--compress-debug-sections=zstd"]
else if pkgs.stdenv.isDarwin
then
# on darwin, /usr/bin/ld actually looks at the environment variable
# $DEVELOPER_DIR, which is set by the nix stdenv, and if set,
# automatically uses it to route the `ld` invocation to the binary
# within. in the devShell though, that isn't what we want; it's
# functional, but Xcode's linker as of ~v15 (not yet open source)
# is ultra-fast and very shiny; it is enabled via -ld_new, and on by
# default as of v16+
["--ld-path=$(unset DEVELOPER_DIR; /usr/bin/xcrun --find ld)" "-ld_new"]
else [];
rustLinkFlagsString =
pkgs.lib.concatStringsSep " "
(pkgs.lib.concatMap (x: ["-C" "link-arg=${x}"]) rustLinkerFlags);
# The `RUSTFLAGS` environment variable is set in `shellHook` instead of `env`
# to allow the `xcrun` command above to be interpreted by the shell.
shellHook = ''
export RUSTFLAGS="-Zthreads=0 ${rustLinkFlagsString}"
'';
jujutsu = self.packages.${system}.jujutsu;
in
pkgs.mkShell {
name = "jujutsu";
packages = packages ++ jujutsu.nativeBuildInputs ++ jujutsu.buildInputs;
inherit shellHook;
};
}));
}