ci: introduce CI

.github/workflows/ci.yaml

@@ -0,0 +1,107 @@
+name: CI
+on:
+  pull_request:
+  push:
+    branches: main
+
+jobs:
+  repos:
+    runs-on: ubuntu-latest
+    name: Repos
+
+    strategy:
+      fail-fast: false
+      matrix:
+        repo: 
+          - elixir-lang/elixir
+          - elixir-ecto/ecto
+          - elixir-ecto/ecto_sql
+          - phoenixframework/phoenix
+          - phoenixframework/phoenix_live_view
+          - elixir-tools/next-ls
+          - elixir-tools/gen_lsp
+          - michalmuskala/jason
+          - beam-telemetry/telemetry
+          - elixir-plug/plug
+          - ericmj/decimal
+          - elixir-gettext/gettext
+          - rrrene/credo
+          - wojtekmac/req
+          - bitwalker/timex
+          - mtrudel/bandit
+          - witchcrafters/witchcraft
+          - witchcrafters/type_class
+          - witchcrafters/quark
+          - oestrich/aino
+          - sorentwo/oban
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: DeterminateSystems/nix-installer-action@main
+      - uses: DeterminateSystems/magic-nix-cache-action@main
+      - uses: actions/cache@v4
+        with:
+          path: |
+            deps
+            _build
+          key: ${{ runner.os }}-mix-${{ hashFiles('**/.mise.toml') }}-${{ hashFiles('**/mix.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-mix-${{ hashFiles('**/.mise.toml') }}-
+
+      - name: Install Dependencies
+        run: nix develop --command bash -c "mix deps.get"
+      - name: Clone
+        env: 
+          GH_TOKEN: ${{ github.token }}
+        run: gh repo clone ${{ matrix.repo }} proj
+
+      - name: Test
+        run: |
+          nix develop --command bash -c "bin/ci ./proj"
+
+  test:
+    runs-on: ubuntu-latest
+    name: Tests
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: DeterminateSystems/nix-installer-action@main
+      - uses: DeterminateSystems/magic-nix-cache-action@main
+      - uses: actions/cache@v4
+        with:
+          path: |
+            deps
+            _build
+          key: ${{ runner.os }}-mix-${{ hashFiles('**/.mise.toml') }}-${{ hashFiles('**/mix.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-mix-${{ hashFiles('**/.mise.toml') }}-
+
+      - name: Install Dependencies
+        run: nix develop --command bash -c "mix deps.get"
+
+      - name: Run Formatter
+        run: nix develop --command bash -c "mix test"
+
+  formatter:
+    runs-on: ubuntu-latest
+    name: Formatter
+
+    steps:
+      - uses: actions/checkout@v4
+      - uses: DeterminateSystems/nix-installer-action@main
+      - uses: DeterminateSystems/magic-nix-cache-action@main
+      - uses: actions/cache@v4
+        with:
+          path: |
+            deps
+            _build
+          key: ${{ runner.os }}-mix-${{ hashFiles('**/.mise.toml') }}-${{ hashFiles('**/mix.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-mix-${{ hashFiles('**/.mise.toml') }}-
+
+      - name: Install Dependencies
+        run: nix develop --command bash -c "mix deps.get"
+
+      - name: Run Formatter
+        run: nix develop --command bash -c "mix format --check-formatted"
+

flake.nix

@@ -2,11 +2,8 @@
   description = "spitfire";
 
   inputs = {
-    beam-flakes = {
-      url = "github:shanesveller/nix-beam-flakes";
-      inputs.flake-parts.follows = "flake-parts";
-      inputs.nixpkgs.follows = "nixpkgs";
-    };
+    beam-flakes.url = "github:shanesveller/nix-beam-flakes";
+    beam-flakes.inputs.flake-parts.follows = "flake-parts";
     flake-parts.url = "github:hercules-ci/flake-parts";
     nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
   };
@@ -21,18 +18,43 @@
 
       systems = ["aarch64-darwin" "x86_64-darwin" "x86_64-linux"];
 
-      perSystem = _: {
+      perSystem = {
+        config,
+        pkgs,
+        ...
+      }: {
         beamWorkspace = {
           enable = true;
-          devShell = {
-            languageServers.elixir = false;
-            languageServers.erlang = false;
+          devShell.languageServers.elixir = false;
+          devShell.languageServers.erlang = false;
+          flakePackages = true;
+          pkgSet = let
+            # Provide your desired OTP version here
+            # erlang = pkgs.beam.interpreters.erlang_26;
+            erlang = beam-flakes.lib.mkErlang pkgs "26.2.1" beam-flakes.lib.versions.erlang."26.2.1";
+          in
+            (pkgs.beam.packagesWith erlang).extend (final: prev: {
+              elixir_1_17 = prev.elixir_1_16.override {
+                rev = "52eaf1456182d5d6cce22a4f5c3f6ec9f4dcbfd9";
+                # You can discover this using Trust On First Use by filling in `lib.fakeHash`
+                sha256 = "sha256-fOsV+jVIzsa38hQDvAjhUqee36nt8kG6AOpOQJnSZ74=";
+                version = "1.17.0-dev";
+              };
+
+              elixir = final.elixir_1_17;
+              # This will get upstreamed into nix-beam-flakes at some point
+              rebar = prev.rebar.overrideAttrs (_old: {doCheck = false;});
+              rebar3 = prev.rebar3.overrideAttrs (_old: {doCheck = false;});
+            });
+          packages = {
+            inherit (config.beamWorkspace.pkgSet) elixir erlang elixir-ls erlang-ls;
           };
           versions = {
-            elixir = "1.16.1";
-            erlang = "26.2.1";
+            elixir = null;
+            erlang = null;
           };
         };
       };
     };
 }
+