add some rust templates

templates/default.nix

@@ -1,5 +1,15 @@
+# TODO: templates should be able to have initial states like
+# repo name, author,...
 {pkgs
 ,lib
-,
+,...
 }: {
+  rust = {
+    path = ./rust;
+    description = "Minimal Rust build template using Naersk, rust-overlay, rust-analyzer";
+  };
+  rust-monorepo = {
+    path = ./rust-monorepo;
+    description = "hungtr's opinionated Rust monorepo, extended from ./rust, using Cargo workspace";
+  };
 }

templates/rust-monorepo/.envrc

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

templates/rust-monorepo/.github/workflows/build_nix.yml

@@ -0,0 +1,13 @@
+name: "Build legacy Nix package on Ubuntu"
+
+on:
+  push:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: cachix/install-nix-action@v12
+      - name: Building package
+        run: nix-build . -A defaultPackage.x86_64-linux

templates/rust-monorepo/Cargo.lock

@@ -0,0 +1,14 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "cli"
+version = "0.1.0"
+dependencies = [
+ "core",
+]
+
+[[package]]
+name = "core"
+version = "0.1.0"

templates/rust-monorepo/Cargo.toml

@@ -0,0 +1,5 @@
+[workspace]
+members = [
+    "packages/*",
+    "exec/*"
+]

templates/rust-monorepo/default.nix

@@ -0,0 +1,7 @@
+(import (
+  fetchTarball {
+    url = "https://github.com/edolstra/flake-compat/archive/99f1c2157fba4bfe6211a321fd0ee43199025dbf.tar.gz";
+    sha256 = "0x2jn3vrawwv9xp15674wjz9pixwjyj3j771izayl962zziivbx2"; }
+) {
+  src =  ./.;
+}).defaultNix

templates/rust-monorepo/exec/cli/.gitignore

@@ -0,0 +1 @@
+/target

templates/rust-monorepo/exec/cli/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "cli"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+core = { version = "0.1.0", path = "../../packages/core" }

templates/rust-monorepo/exec/cli/src/main.rs

@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}

templates/rust-monorepo/flake.nix

@@ -0,0 +1,35 @@
+{
+  inputs = {
+    naersk.url = "github:nix-community/naersk/master";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+    utils.url = "github:numtide/flake-utils";
+    rust-overlay = "github:oxalica/rust-overlay";
+  };
+
+  outputs = { self, nixpkgs, utils, naersk, rust-overlay }:
+    utils.lib.eachDefaultSystem (system:
+      let
+        overlays = [ rust-overlay.overlays.default ];
+        pkgs = import nixpkgs { inherit system overlays; };
+        naersk-lib = pkgs.callPackage naersk { };
+      in
+      {
+        defaultPackage = naersk-lib.buildPackage ./.;
+        devShell = with pkgs; mkShell {
+          buildInputs = [
+            (pkgs.rust-bin.selectLatestNightlyWith
+              (
+                toolchain:
+                toolchain.default.override {
+                  extensions = [ "rust-src" ];
+                }
+              ))
+            pkgs.rust-analyzer
+          ];
+          RUST_SRC_PATH = rustPlatform.rustLibSrc;
+          shellHook = ''
+            # nix flake update # is this even needed?
+          '';
+        };
+      });
+}

templates/rust-monorepo/packages/core/.gitignore

@@ -0,0 +1,2 @@
+/target
+/Cargo.lock

templates/rust-monorepo/packages/core/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "core"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

templates/rust-monorepo/packages/core/src/lib.rs

@@ -0,0 +1,14 @@
+pub fn add(left: usize, right: usize) -> usize {
+    left + right
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn it_works() {
+        let result = add(2, 2);
+        assert_eq!(result, 4);
+    }
+}

templates/rust-monorepo/shell.nix

@@ -0,0 +1,7 @@
+(import (
+  fetchTarball {
+    url = "https://github.com/edolstra/flake-compat/archive/99f1c2157fba4bfe6211a321fd0ee43199025dbf.tar.gz";
+    sha256 = "0x2jn3vrawwv9xp15674wjz9pixwjyj3j771izayl962zziivbx2"; }
+) {
+  src =  ./.;
+}).shellNix

templates/rust/.envrc

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

templates/rust/.github/workflows/build_nix.yml

@@ -0,0 +1,13 @@
+name: "Build legacy Nix package on Ubuntu"
+
+on:
+  push:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: cachix/install-nix-action@v12
+      - name: Building package
+        run: nix-build . -A defaultPackage.x86_64-linux

templates/rust/default.nix

@@ -0,0 +1,7 @@
+(import (
+  fetchTarball {
+    url = "https://github.com/edolstra/flake-compat/archive/99f1c2157fba4bfe6211a321fd0ee43199025dbf.tar.gz";
+    sha256 = "0x2jn3vrawwv9xp15674wjz9pixwjyj3j771izayl962zziivbx2"; }
+) {
+  src =  ./.;
+}).defaultNix

templates/rust/flake.nix

@@ -0,0 +1,35 @@
+{
+  inputs = {
+    naersk.url = "github:nix-community/naersk/master";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+    utils.url = "github:numtide/flake-utils";
+    rust-overlay = "github:oxalica/rust-overlay";
+  };
+
+  outputs = { self, nixpkgs, utils, naersk, rust-overlay }:
+    utils.lib.eachDefaultSystem (system:
+      let
+        overlays = [ rust-overlay.overlays.default ];
+        pkgs = import nixpkgs { inherit system overlays; };
+        naersk-lib = pkgs.callPackage naersk { };
+      in
+      {
+        defaultPackage = naersk-lib.buildPackage ./.;
+        devShell = with pkgs; mkShell {
+          buildInputs = [
+            (pkgs.rust-bin.selectLatestNightlyWith
+              (
+                toolchain:
+                toolchain.default.override {
+                  extensions = [ "rust-src" ];
+                }
+              ))
+            pkgs.rust-analyzer
+          ];
+          RUST_SRC_PATH = rustPlatform.rustLibSrc;
+          shellHook = ''
+            # nix flake update # is this even needed?
+          '';
+        };
+      });
+}

templates/rust/shell.nix

@@ -0,0 +1,7 @@
+(import (
+  fetchTarball {
+    url = "https://github.com/edolstra/flake-compat/archive/99f1c2157fba4bfe6211a321fd0ee43199025dbf.tar.gz";
+    sha256 = "0x2jn3vrawwv9xp15674wjz9pixwjyj3j771izayl962zziivbx2"; }
+) {
+  src =  ./.;
+}).shellNix