chore: add Github Action to run CI checks

.github/workflows/elixir.yml

@@ -0,0 +1,107 @@
+name: Elixir CI
+
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+    branches: ["main"]
+
+env:
+  MIX_ENV: test
+  TEST_DATABASE_URL: "postgresql://postgres:postgres@localhost:5432/postgres"
+
+permissions:
+  contents: read
+
+jobs:
+  test:
+    services:
+      db:
+        image: postgres:12
+        ports: ["5432:5432"]
+        env:
+          POSTGRES_PASSWORD: postgres
+        options: >-
+          --health-cmd pg_isready
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
+
+    runs-on: ubuntu-latest
+    name: Test on OTP ${{matrix.otp}} / Elixir ${{matrix.elixir}}
+    strategy:
+      matrix:
+        otp: ["27.2"]
+        elixir: ["1.18.1"]
+    steps:
+      - name: Set up Elixir
+        uses: erlef/setup-beam@v1
+        with:
+          otp-version: ${{matrix.otp}}
+          elixir-version: ${{matrix.elixir}}
+
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Cache deps
+        id: cache-deps
+        uses: actions/cache@v3
+        env:
+          cache-name: cache-elixir-deps
+        with:
+          path: deps
+          key: ${{ runner.os }}-mix-${{ env.cache-name }}-${{ hashFiles('**/mix.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-mix-${{ env.cache-name }}-
+
+      - name: Cache compiled build
+        id: cache-build
+        uses: actions/cache@v3
+        env:
+          cache-name: cache-compiled-build
+        with:
+          path: _build
+          key: ${{ runner.os }}-mix-${{ env.cache-name }}-${{ hashFiles('**/mix.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-mix-${{ env.cache-name }}-
+            ${{ runner.os }}-mix-
+
+      - name: Install dependencies
+        run: mix deps.get
+
+      - name: Compile without warnings
+        run: mix compile --warnings-as-errors
+
+      - name: Check formatting
+        run: mix format --check-formatted
+
+      - name: Run tests
+        run: mix test
+
+      - name: Restore PLT cache
+        id: plt_cache
+        uses: actions/cache/restore@v3
+        with:
+          key: |
+            plt-${{ runner.os }}-${{ steps.beam.outputs.otp-version }}-${{ steps.beam.outputs.elixir-version }}-${{ hashFiles('**/mix.lock') }}
+          restore-keys: |
+            plt-${{ runner.os }}-${{ steps.beam.outputs.otp-version }}-${{ steps.beam.outputs.elixir-version }}-
+          path: |
+            priv/plts
+
+      - name: Create PLTs
+        if: steps.plt_cache.outputs.cache-hit != 'true'
+        run: mix dialyzer --plt
+
+      - name: Save PLT cache
+        id: plt_cache_save
+        uses: actions/cache/save@v3
+        if: steps.plt_cache.outputs.cache-hit != 'true'
+        with:
+          key: |
+            plt-${{ runner.os }}-${{ steps.beam.outputs.otp-version }}-${{ steps.beam.outputs.elixir-version }}-${{ hashFiles('**/mix.lock') }}
+          path: |
+            priv/plts
+
+      - name: Run dialyzer
+        run: mix dialyzer --format github --format dialyxir

mix.exs

@@ -58,7 +58,7 @@ defmodule Algora.MixProject do
       {:dns_cluster, "~> 0.1.1"},
       {:bandit, "~> 1.2"},
       {:credo, "~> 1.7", only: [:dev, :test], runtime: false},
-      {:dialyxir, "~> 1.3", only: [:dev], runtime: false},
+      {:dialyxir, "~> 1.3", only: [:dev, :test], runtime: false},
       {:joken, "~> 2.5"},
       {:nanoid, "~> 2.1.0"},
       {:ex_cldr, "~> 2.0"},