chore(nix): setup nix flake (#9)

Fixes #4

Author: GregoryConrad

.envrc

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

.github/workflows/build.yml

@@ -29,30 +29,24 @@ jobs:
         run: |
           curl -sfL https://direnv.net/install.sh | bash
           echo "$HOME/.local/bin" >> $GITHUB_PATH
-      # - name: Load environment variables
-      #   run: |
-      #     direnv allow .
-      #     direnv export gha > "$GITHUB_ENV"
-
-      # # Codegen
-      # - name: Run codegen
-      #   run: melos run codegen
-      # - name: Ensure there are no diffs from codegen
-      #   run: git diff --exit-code
+      - name: Load environment variables
+        run: |
+          direnv allow .
+          direnv export gha > "$GITHUB_ENV"
 
       # # Rust
-      # - name: Rust format
-      #   run: cargo fmt --all --check
       # - name: Rust lint
       #   run: cargo clippy -- -D warnings
+      # - name: Rust format
+      #   run: cargo fmt --all --check
       # - name: Rust tests
       #   run: cargo test
 
-      # # Dart/Flutter
-      # - name: Dart format
-      #   run: dart format --set-exit-if-changed .
-      # - name: Dart lint
-      #   run: flutter analyze --fatal-infos --fatal-warnings
+      # Dart/Flutter
+      - name: Dart lint
+        run: flutter analyze --fatal-infos --fatal-warnings
+      - name: Dart format
+        run: dart format --set-exit-if-changed .
       # - name: Dart tests
       #   run: melos run test
 

flake.lock

@@ -0,0 +1,85 @@
+{
+  description = "native_toolchain_rs";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs =
+    {
+      self,
+      nixpkgs,
+      utils,
+    }:
+    utils.lib.eachDefaultSystem (
+      system:
+      let
+        pkgs = import nixpkgs {
+          inherit system;
+          config.allowUnfree = true;
+        };
+      in
+      {
+        formatter = pkgs.nixfmt-tree;
+
+        devShells = {
+          default = pkgs.mkShell {
+            packages = with pkgs; [
+              # TODO flutter335 but at version where native assets works
+              rustup
+              llvmPackages_20.clangUseLLVM
+            ];
+
+            env = {
+              RUST_BACKTRACE = "1";
+            };
+
+            shellHook = ''
+              export PATH=$HOME/.pub-cache/bin:$PATH
+              dart pub global activate melos
+            '';
+          };
+
+          android =
+            let
+              arch = builtins.head (builtins.split "-" system);
+              androidEnv = pkgs.androidenv.override { licenseAccepted = true; };
+              androidComposition = androidEnv.composeAndroidPackages {
+                platformVersions = [
+                  "35"
+                  "36"
+                ];
+                buildToolsVersions = [ "35.0.0" ];
+                cmakeVersions = [ "3.22.1" ];
+                includeNDK = true;
+                ndkVersions = [ "27.0.12077973" ];
+
+                # For the emulator:
+                includeEmulator = true;
+                includeSystemImages = true;
+                systemImageTypes = [ "default" ];
+                abiVersions = [
+                  {
+                    "x86_64" = "x86_64";
+                    "aarch64" = "arm64-v8a";
+                  }
+                  .${arch} or (throw "Unsupported architecture: ${arch}")
+                ];
+              };
+            in
+            pkgs.mkShell {
+              packages = with pkgs; [
+                androidComposition.androidsdk
+                jdk17
+              ];
+
+              env = rec {
+                ANDROID_HOME = "${androidComposition.androidsdk}/libexec/android-sdk";
+                ANDROID_NDK_ROOT = "${ANDROID_HOME}/ndk-bundle";
+              };
+            };
+        };
+      }
+    );
+}

flake.nix

@@ -106,10 +106,6 @@ final class RustBuilder {
       tomlDocumentWrapperFactory: tomlDocumentWrapperFactory,
       cargoManifestParser: cargoManifestParser,
       toolchainTomlParser: toolchainTomlParser,
-    ).run(
-      input: input,
-      output: output,
-      assetRouting: assetRouting,
-    );
+    ).run(input: input, output: output, assetRouting: assetRouting);
   }
 }

lib/native_toolchain_rs.dart

@@ -94,10 +94,7 @@ final class RustBuildRunner {
         '--target-dir',
         outputDir,
         if (!enableDefaultFeatures) '--no-default-features',
-        if (features.isNotEmpty) ...[
-          '--features',
-          features.join(','),
-        ],
+        if (features.isNotEmpty) ...['--features', features.join(',')],
         ...extraCargoBuildArgs,
       ],
       environment: {

lib/src/build_runner.dart

@@ -72,10 +72,7 @@ final class CargoManifestParser {
       () => manifest.walk<List<dynamic>>('lib.crate-type').cast<String>(),
     ]);
 
-    return (
-      crateName: crateName,
-      libCrateTypes: libCrateTypes,
-    );
+    return (crateName: crateName, libCrateTypes: libCrateTypes);
   }
 }
 
@@ -114,9 +111,6 @@ final class ToolchainTomlParser {
           .toSet(),
     ]);
 
-    return (
-      channel: channel,
-      targets: targets,
-    );
+    return (channel: channel, targets: targets);
   }
 }