feat: add nix flake

.envrc

@@ -0,0 +1 @@
+use flake

.gitignore

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+result
+result*
+.direnv
+.pre-commit-config.yaml
+target

Cargo.toml

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+[workspace]
+members = ["crates/*"]
+resolver = "2"
+
+[profile.release]
+# opt-level = 2 # fast and small wasm
+

crates/cli/Cargo.toml

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+[package]
+name = "cli"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+# clap = { version = "4.0.19", features = ["derive"] }
+# reqwest = { version = "0.11.12", features = ["rustls-tls"] }
+# serde = { version = "1", features = ["derive"] }
+# serde_json = "1.0.87"
+# tokio = { version = "1", features = ["full"] }

crates/cli/src/main.rs

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+fn main() {
+    println!("Hello, world!");
+}

flake-parts/cargo.nix

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+{
+  inputs,
+  self,
+  ...
+} @ part-inputs: {
+  imports = [];
+
+  perSystem = {
+    pkgs,
+    lib,
+    system,
+    inputs',
+    ...
+  }: let
+    devTools = with pkgs; [
+      # rust tooling
+      fenix-toolchain
+      bacon
+      rustfmt
+      # misc
+    ];
+
+    extraBuildInputs = [
+      pkgs.pkg-config
+    ];
+    extraNativeBuildInputs = [
+    ];
+
+    allBuildInputs = base: base ++ extraBuildInputs;
+    allNativeBuildInputs = base: base ++ extraNativeBuildInputs;
+
+    fenix-channel = inputs'.fenix.packages.latest;
+    fenix-toolchain = fenix-channel.withComponents [
+      "rustc"
+      "cargo"
+      "clippy"
+      "rust-analysis"
+      "rust-src"
+      "rustfmt"
+      "llvm-tools-preview"
+    ];
+
+    craneLib = inputs.crane.lib.${system}.overrideToolchain fenix-toolchain;
+
+    common-build-args = rec {
+      src = inputs.nix-filter.lib {
+        root = ../.;
+        include = [
+          "crates"
+          "Cargo.toml"
+          "Cargo.lock"
+        ];
+      };
+
+      pname = "thoenix";
+
+      buildInputs = allBuildInputs [];
+      nativeBuildInputs = allNativeBuildInputs [];
+      LD_LIBRARY_PATH = pkgs.lib.makeLibraryPath buildInputs;
+    };
+    deps-only = craneLib.buildDepsOnly ({} // common-build-args);
+
+    clippy-check = craneLib.cargoClippy ({
+        cargoArtifacts = deps-only;
+        cargoClippyExtraArgs = "--all-features -- --deny warnings";
+      }
+      // common-build-args);
+
+    rust-fmt-check = craneLib.cargoFmt ({
+        inherit (common-build-args) src;
+      }
+      // common-build-args);
+
+    tests-check = craneLib.cargoNextest ({
+        cargoArtifacts = deps-only;
+        partitions = 1;
+        partitionType = "count";
+      }
+      // common-build-args);
+
+    pre-commit-hooks = inputs.pre-commit-hooks.lib.${system}.run {
+      inherit (common-build-args) src;
+      hooks = {
+        alejandra.enable = true;
+      };
+    };
+
+    cli-package = craneLib.buildPackage ({
+        pname = "cli";
+        cargoArtifacts = deps-only;
+        cargoExtraArgs = "--bin cli";
+      }
+      // common-build-args);
+  in rec {
+    devShells.default = pkgs.mkShell rec {
+      buildInputs = allBuildInputs [fenix-toolchain] ++ devTools;
+      nativeBuildInputs = allNativeBuildInputs [];
+      LD_LIBRARY_PATH = pkgs.lib.makeLibraryPath buildInputs;
+      inherit (self.checks.${system}.pre-commit-hooks) shellHook;
+    };
+
+    packages = {
+      inherit fenix-toolchain;
+      default = packages.cli;
+      cli = cli-package;
+    };
+
+    apps = {
+      cli = {
+        type = "app";
+        program = "${self.packages.${system}.cli}/bin/cli";
+      };
+      default = apps.cli;
+    };
+
+    checks = {
+      inherit pre-commit-hooks;
+      clippy = clippy-check;
+      tests = tests-check;
+      rust-fmt = rust-fmt-check;
+    };
+  };
+}