feat(ci): initial setup

.envrc.example

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

.github/workflows/ci.yaml

@@ -0,0 +1,39 @@
+name: CI/CD
+on:
+  workflow_call:
+  push:
+    branches:
+      - main
+  pull_request:
+  workflow_dispatch:
+
+# https://stackoverflow.com/a/72408109
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  check-inputs:
+    runs-on: ubuntu-24.11
+    outputs:
+      is-default-branch: ${{ steps.set-is-default-branch.outputs.CI_IS_DEFAULT_BRANCH }}
+
+    steps:
+      - name: Set is-default-branch
+        id: set-is-default-branch
+        run: |
+          CI_IS_DEFAULT_BRANCH="${{ github.ref == format('refs/heads/{0}', github.event.repository.default_branch) }}"
+          echo "CI_IS_DEFAULT_BRANCH=${CI_IS_DEFAULT_BRANCH}" >> $GITHUB_OUTPUT
+          echo "CI_IS_DEFAULT_BRANCH=${CI_IS_DEFAULT_BRANCH}" >> $GITHUB_ENV
+          echo "CI_IS_DEFAULT_BRANCH=${CI_IS_DEFAULT_BRANCH}"
+
+  nix:
+    name: Nix
+    needs: check-inputs
+    uses: ./.github/workflows/nix.yaml
+    secrets: inherit
+
+  csharp:
+    name: C#
+    needs: check-inputs
+    uses: ./.github/workflows/csharp.yaml

.github/workflows/csharp.yaml

@@ -0,0 +1,14 @@
+name: C#
+on:
+  workflow_dispatch:
+  workflow_call:
+
+jobs:
+  build_upm:
+    name: Build Unity Packages
+    runs-on: ubuntu-24.11
+    steps:
+      - uses: actions/checkout@v4
+      - name: Build
+        runs: |
+          just build

.github/workflows/nix.yaml

@@ -0,0 +1,19 @@
+name: Nix CI
+on:
+  workflow_call:
+    secrets:
+      CACHIX_AUTH_TOKEN:
+        required: true
+
+jobs:
+  fmt:
+    name: Check Nix Formatting
+    runs-on: ubuntu-24.04
+    steps:
+    - uses: actions/checkout@v4
+    - uses: cachix/install-nix-action@v30
+    # - uses: cachix/cachix-action@v15
+    #   with:
+    #     name: basis-ci
+    #     authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}
+    - run: nix develop -c nixpkgs-fmt --check .

.gitignore

@@ -71,3 +71,7 @@ crashlytics-build.properties
 # Temporary auto-generated Android Assets
 /[Aa]ssets/[Ss]treamingAssets/aa.meta
 /[Aa]ssets/[Ss]treamingAssets/aa/*
+
+# nix stuff
+.direnv/
+.envrc

flake.nix

@@ -0,0 +1,45 @@
+{
+  description = "BasisVR/UpmBuilds repo";
+
+  inputs = {
+    flake-utils.url = "github:numtide/flake-utils";
+    nixpkgs.url = "github:NixOS/nixpkgs/release-24.11";
+    nixpkgs-unstable.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+  };
+
+  outputs = inputs-raw@{ flake-utils, ... }:
+    let
+      # All systems we may care about evaluating nixpkgs for
+      systems = with flake-utils.lib.system; [ x86_64-linux aarch64-linux aarch64-darwin x86_64-darwin ];
+      perSystem = (system: rec {
+        inputs = inputs-raw;
+        pkgs = import inputs.nixpkgs {
+          inherit system;
+          overlays = [
+            ((import nix/overlays/nixpkgs-unstable.nix) { inherit inputs; })
+          ];
+          config = {
+            # allowUnfree = true;
+            permittedInsecurePackages = [
+              # Needed for roslyn-ls, see
+              # https://github.com/NixOS/nixpkgs/blob/4989a246/pkgs/by-name/ro/roslyn-ls/package.nix#L21
+              "dotnet-sdk-6.0.428"
+            ];
+          };
+        };
+      });
+      # This `s` helper variable caches each system we care about in one spot
+      inherit (flake-utils.lib.eachSystem systems (system: { s = perSystem system; })) s;
+    in
+    # System-specific stuff goes in here, by using the flake-utils helper functions
+    flake-utils.lib.eachSystem systems
+      (system:
+        let
+          inherit (s.${system}) pkgs inputs;
+        in
+        {
+          formatter = pkgs.nixpkgs-fmt;
+          devShells = import ./nix/devShells.nix { inherit system pkgs inputs; };
+        }
+      );
+}

msbuild/README.md

@@ -0,0 +1,3 @@
+# Packages from MSBuild
+
+These packages are built from msbuild, and turned into Unity Packages.

msbuild/SimpleBase/justfile

@@ -0,0 +1,25 @@
+git_repo := "https://github.com/ssg/SimpleBase.git"
+git_ref := "4.0.2"
+dll_name := "SimpleBase.dll"
+out_dir := invocation_directory()
+
+working_dir := `mktemp -d`
+repo_dir := working_dir / "repo"
+dotnet_artifact_dir := working_dir / "dotnet_artifacts"
+
+default:
+    just --list
+
+# Clean build outputs
+clean:
+    dotnet clean {{repo_dir}} || true
+    rm -rf {{repo_dir}}/**/bin {{repo_dir}}/**/obj
+
+clone:
+    git clone --single-branch --branch {{git_ref}} {{git_repo}} {{repo_dir}}
+
+restore:
+    dotnet restore {{repo_dir}} --artifacts-path {{dotnet_artifact_dir}}
+
+build: restore
+    dotnet build --configuration Release {{repo_dir}} -o {{dotnet_artifact_dir}}

msbuild/SimpleBase/package.json

@@ -0,0 +1,7 @@
+{
+  "name": "org.basisvr.simplebase",
+  "version": "4.0.2",
+  "displayName": "SimpleBase",
+  "description": "Base16, Base32, Base58, Base85 encoding/decoding library",
+  "documentationUrl": "https://github.com/ssg/SimpleBase"
+}

nix/devShells.nix

@@ -0,0 +1,26 @@
+# Defines all devShells for the flake
+{ system, pkgs, inputs }:
+let
+  dotnet = (with pkgs.dotnetCorePackages;
+    # Multiple dotnet sdks can be provided here
+    combinePackages [
+      sdk_9_0
+    ]);
+in
+{
+  default = pkgs.mkShell {
+    # These programs be available to the dev shell
+    buildInputs = (with pkgs; [
+      dotnet
+      just
+      nixpkgs-fmt
+      roslyn-ls
+    ]) ++ pkgs.lib.optional pkgs.stdenv.isDarwin [
+      pkgs.libiconv
+    ];
+
+    # Hook the shell to set custom env vars
+    shellHook = ''
+    '';
+  };
+}

nix/overlays/nixpkgs-unstable.nix

@@ -0,0 +1,7 @@
+{ inputs, ... }:
+final: _prev: {
+  unstable = import inputs.nixpkgs-unstable {
+    system = final.system;
+    config = final.config;
+  };
+}