Add Nix devshell and direnv support

5 files changed, 141 insertions, 0 deletions

diff --git a/.envrc b/.envrc
new file mode 100644
index 0000000..af0cc93
--- /dev/null
+++ b/.envrc
@@ -0,0 +1,2 @@
+#!/usr/bin/env bash
+use flake
diff --git a/.gitignore b/.gitignore
index ed8080f..fb2185d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,5 @@
 /axisc/target
 /axis-rt/target
 /demo
+
+/.direnv
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..79e3c18
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,65 @@
+{
+  "nodes": {
+    "fenix": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ],
+        "rust-analyzer-src": "rust-analyzer-src"
+      },
+      "locked": {
+        "lastModified": 1712384501,
+        "narHash": "sha256-AZmYmEnc1ZkSlxUJVUtGh9VFAqWPr+xtNIiBqD2eKfc=",
+        "owner": "nix-community",
+        "repo": "fenix",
+        "rev": "99c6241db5ca5363c05c8f4acbdf3a4e8fc42844",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "fenix",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1712439257,
+        "narHash": "sha256-aSpiNepFOMk9932HOax0XwNxbA38GOUVOiXfUVPOrck=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "ff0dbd94265ac470dda06a657d5fe49de93b4599",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "ref": "nixos-unstable",
+        "type": "indirect"
+      }
+    },
+    "root": {
+      "inputs": {
+        "fenix": "fenix",
+        "nixpkgs": "nixpkgs"
+      }
+    },
+    "rust-analyzer-src": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1712156296,
+        "narHash": "sha256-St7ZQrkrr5lmQX9wC1ZJAFxL8W7alswnyZk9d1se3Us=",
+        "owner": "rust-lang",
+        "repo": "rust-analyzer",
+        "rev": "8e581ac348e223488622f4d3003cb2bd412bf27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "rust-lang",
+        "ref": "nightly",
+        "repo": "rust-analyzer",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..cec4abb
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,33 @@
+{
+  inputs = {
+    nixpkgs.url = "nixpkgs/nixos-unstable";
+
+    fenix = {
+      url = "github:nix-community/fenix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+
+  outputs = { self, nixpkgs, fenix }:
+  let
+    overlays = [ fenix.overlays.default ];
+
+    getPkgsFor = (system: import nixpkgs {
+      inherit system overlays;
+    });
+
+    forEachSystem = func: nixpkgs.lib.genAttrs [
+      "x86_64-linux"
+      "i686-linux"
+      "aarch64-linux"
+
+      "aarch64-darwin"
+      "x86_64-darwin"
+    ] (system: func (getPkgsFor system));
+
+  in {
+    devShells = forEachSystem (pkgs: {
+      default = pkgs.callPackage ./shell.nix {};
+    });
+  };
+}
diff --git a/shell.nix b/shell.nix
new file mode 100644
index 0000000..7ed5296
--- /dev/null
+++ b/shell.nix
@@ -0,0 +1,39 @@
+{ mkShell, pkgsCross, fenix }:
+
+# Reference: https://github.com/nix-community/naersk/blob/aeb58d5e8faead8980a807c840232697982d47b9/examples/cross-windows/flake.nix
+
+let
+  channel = "stable";
+
+  targets = with fenix.targets; [
+    x86_64-unknown-linux-gnu
+    i686-unknown-linux-gnu
+    aarch64-unknown-linux-gnu
+
+    aarch64-apple-darwin
+    x86_64-apple-darwin
+  ];
+
+  crossCompileTargets = with fenix.targets; [
+    x86_64-pc-windows-gnu
+  ];
+
+  toolchain = fenix.combine (with fenix.${channel}; [
+    cargo
+    rustc
+  ] ++ map (target: target.${channel}.toolchain) targets
+    ++ map (target: target.${channel}.rust-std) crossCompileTargets);
+
+in
+
+mkShell {
+  buildInputs = with pkgsCross.mingwW64; [
+    stdenv.cc
+  ];
+
+  packages = [ toolchain ];
+
+  # Link to libpthreads manually otherwise build fails
+  # See: https://github.com/NixOS/nixpkgs/issues/139966#issuecomment-1385222547
+  env.CARGO_TARGET_X86_64_PC_WINDOWS_GNU_RUSTFLAGS = "-L native=${pkgsCross.mingwW64.windows.pthreads}/lib";
+}