Add GitHub CI config.

Author: potatosalad

.github/workflows/ci.yml

@@ -0,0 +1,87 @@
+name: CI
+
+on: [push, pull_request]
+
+env:
+  CC: clang
+  CXX: clang++
+  MIX_ENV: test
+  WARNINGS_AS_ERRORS: true
+
+jobs:
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - elixir: 1.18.4
+            otp: 28.0.2
+            rebar3: 3.25.1
+            lint: true
+
+          - elixir: 1.18.4
+            otp: 27.3
+            rebar3: 3.25.1
+
+    steps:
+      - uses: actions/checkout@v5
+
+      - name: Setup Beam
+        uses: erlef/setup-beam@v1
+        with:
+          elixir-version: ${{ matrix.elixir }}
+          otp-version: ${{ matrix.otp }}
+          rebar3-version: ${{ matrix.rebar3 }}
+
+      # - name: (Erlang) Check Formatting
+      #   if: ${{ matrix.lint }}
+      #   run: |
+      #     clang-format --version
+      #     make lint-format
+
+      # - name: (Erlang) eqWAlizer
+      #   if: ${{ matrix.lint }}
+      #   run: make lint-eqwalizer
+
+      # - name: (Erlang) Dialyzer
+      #   if: ${{ matrix.lint }}
+      #   run: make lint-dialyzer
+
+      # - name: (Erlang) Xref
+      #   if: ${{ matrix.lint }}
+      #   run: make lint-xref
+
+      - name: (Erlang) Tests
+        run: |
+          rebar3 ct
+
+      # - name: (Elixir) Retrieve Mix Dependencies Cache
+      #   uses: actions/cache@v4
+      #   id: mix-cache
+      #   with:
+      #     path: deps
+      #     key: ${{ runner.os }}-${{ matrix.otp }}-${{ matrix.elixir }}-mix-${{ hashFiles(format('{0}{1}', github.workspace, '/mix.lock')) }}
+
+      # - name: (Elixir) Install Mix Dependencies
+      #   if: steps.mix-cache.outputs.cache-hit != 'true'
+      #   run: |
+      #     mix local.rebar --force
+      #     mix local.hex --force
+      #     mix deps.get
+
+      # - name: (Elixir) Check Formatting
+      #   if: ${{ matrix.lint }}
+      #   run: mix format --check-formatted
+
+      # - name: (Elixir) Tests
+      #   run: mix test --trace
+
+      - name: Logs
+        uses: actions/upload-artifact@v4
+        if: failure()
+        with:
+          name: ct-logs-${{ matrix.otp }}-${{ matrix.elixir }}
+          path: _build/test/logs/