Update CI

.github/workflows/ci.yml

@@ -1,25 +1,60 @@
-name: ci
+name: CI Workflow
 
-on: [push, pull_request]
+on:
+  pull_request:
+    branches: [ main ]
+  push:
+    branches: [ main ]
 
 jobs:
-  build:
-    name: Elixir ${{matrix.elixir}} (Erlang/OTP ${{matrix.otp}})
-    runs-on: ubuntu-latest
+  test:
     strategy:
       matrix:
-        otp: ['26']
-        elixir: ['1.14', '1.15', '1.16']
+        otp-version = ['26']
+        elixir-version: ['1.14', '1.15', '1.16']
+    name: CI
+    runs-on: ubuntu-latest
+
     steps:
-      - uses: actions/checkout@v2
-      - uses: erlef/setup-beam@v1
-        with:
-          otp-version: ${{ matrix.otp }}
-          elixir-version: ${{ matrix.elixir }}
-      - run: mix deps.get
-      - run: mix compile --warnings-as-errors
-      # - run: mix credo --strict
-      - name: "Check formatted?"
-        run: mix format mix.exs "{lib,test}/**/*.{ex,exs}" --check-formatted
-        if: ${{ startsWith(matrix.elixir, '1.11XX') }}
-      - run: mix test
+    - name: Checkout
+      uses: actions/checkout@v3
+
+    - name: Setup Erlang and Elixir
+      uses: erlef/setup-beam@v1
+      id: setup-beam
+      with:
+        otp-version: ${{ matrix.otp-version }}
+        elixir-version: ${{ matrix.elixir-version }}
+
+    - name: Restore dependencies and _build
+      uses: actions/cache/restore@v3
+      with:
+        key: mix-${{ steps.setup-beam.outputs.otp-version }}-${{ steps.setup-beam.outputs.elixir-version }}-${{ hashFiles('mix.lock') }}
+        path: |
+          _build
+          deps
+        restore-keys: |
+          mix-${{ steps.setup-beam.outputs.otp-version }}-${{ steps.setup-beam.outputs.elixir-version }}-
+          mix-${{ steps.setup-beam.outputs.otp-version }}-
+          mix-
+
+    - name: Download and compile dependencies
+      run: |
+        mix deps.get
+        mix deps.compile
+
+    - name: Check formatting and compile
+      run: |
+        mix compile --warnings-as-errors
+
+    - name: Cache dependencies and _build
+      uses: actions/cache/save@v3
+      with:
+        key: mix-${{ steps.setup-beam.outputs.otp-version }}-${{ steps.setup-beam.outputs.elixir-version }}-${{ hashFiles('mix.lock') }}
+        path: |
+          _build
+          deps
+
+    - name: Run tests
+      run: |
+        mix test --warnings-as-errors

.gitignore

@@ -27,3 +27,5 @@ pathex-*.tar
 # Nix auto shell
 .direnv
 .envrc
+.nix-mix
+.nix-hex