From c37a55d570c165364a40a43863037f4696e87e58 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Moritz=20B=C3=B6hme?= <mail@moritzboeh.me>
Date: Sat, 20 Jan 2024 13:08:31 +0100
Subject: [PATCH] feat: add rust template

---
 flake.nix                         |  5 ++++
 templates/rust/.cargo/config.toml |  2 ++
 templates/rust/.envrc             |  1 +
 templates/rust/.gitignore         | 24 +++++++++++++++
 templates/rust/flake.nix          | 50 +++++++++++++++++++++++++++++++
 5 files changed, 82 insertions(+)
 create mode 100644 templates/rust/.cargo/config.toml
 create mode 100644 templates/rust/.envrc
 create mode 100644 templates/rust/.gitignore
 create mode 100644 templates/rust/flake.nix

diff --git a/flake.nix b/flake.nix
index a68262c..ef50c78 100644
--- a/flake.nix
+++ b/flake.nix
@@ -204,8 +204,13 @@
 
         templates = {
           python = {
+            description = "Simple poetry shell.nix";
             path = ./templates/python;
           };
+          rust = {
+            description = "Crane + Fenix flake with mold for faster local builds.";
+            path = ./templates/rust;
+          };
         };
       };
     };
diff --git a/templates/rust/.cargo/config.toml b/templates/rust/.cargo/config.toml
new file mode 100644
index 0000000..4b929fe
--- /dev/null
+++ b/templates/rust/.cargo/config.toml
@@ -0,0 +1,2 @@
+[target.x86_64-unknown-linux-gnu]
+linker = "clang"
diff --git a/templates/rust/.envrc b/templates/rust/.envrc
new file mode 100644
index 0000000..3550a30
--- /dev/null
+++ b/templates/rust/.envrc
@@ -0,0 +1 @@
+use flake
diff --git a/templates/rust/.gitignore b/templates/rust/.gitignore
new file mode 100644
index 0000000..d38c33a
--- /dev/null
+++ b/templates/rust/.gitignore
@@ -0,0 +1,24 @@
+# Created by https://www.toptal.com/developers/gitignore/api/rust,direnv
+# Edit at https://www.toptal.com/developers/gitignore?templates=rust,direnv
+
+### direnv ###
+.direnv
+.envrc
+
+### Rust ###
+# Generated by Cargo
+# will have compiled files and executables
+debug/
+target/
+
+# Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
+# More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html
+# Cargo.lock
+
+# These are backup files generated by rustfmt
+**/*.rs.bk
+
+# MSVC Windows builds of rustc generate these, which store debugging information
+*.pdb
+
+# End of https://www.toptal.com/developers/gitignore/api/rust,direnv
diff --git a/templates/rust/flake.nix b/templates/rust/flake.nix
new file mode 100644
index 0000000..3c67202
--- /dev/null
+++ b/templates/rust/flake.nix
@@ -0,0 +1,50 @@
+{
+  inputs = {
+    crane = {
+      url = "github:ipetkov/crane";
+      inputs = {
+        flake-utils.follows = "flake-utils";
+        nixpkgs.follows = "nixpkgs";
+      };
+    };
+    fenix = {
+      url = "github:nix-community/fenix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+    flake-utils.url = "github:numtide/flake-utils";
+    nixpkgs.url = "nixpkgs/nixos-unstable";
+  };
+
+  outputs = { self, crane, fenix, flake-utils, nixpkgs }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = (import nixpkgs) {
+          inherit system;
+        };
+        toolchain = fenix.packages.${system}.stable;
+        craneLib = crane.lib.${system}.overrideToolchain toolchain.toolchain;
+      in
+      {
+        packages.default =
+          let
+            inherit (pkgs.lib) fileset;
+          in
+          craneLib.buildPackage {
+            src = fileset.toSource {
+              root = ./.;
+              fileset = fileset.intersection
+                (fileset.difference ./.
+                  (fileset.unions [ ./.cargo ./flake.nix ./flake.lock ./.envrc ]))
+                (fileset.gitTracked ./.);
+            };
+          };
+
+        devShell = pkgs.mkShell.override
+          {
+            stdenv = pkgs.stdenvAdapters.useMoldLinker pkgs.clangStdenv;
+          }
+          {
+            nativeBuildInputs = with toolchain; [ rustc cargo rust-analyzer clippy ];
+          };
+      });
+}