chore: add lint step

In this step we check:

1. format
2. credo
3. dialyzer

.drone.yml

@@ -5,7 +5,6 @@ name: test
 
 trigger:
   event:
-    - push
     - pull_request
 
 steps:
@@ -17,6 +16,21 @@ steps:
       PGHOST: db
     commands:
       - while ! pg_isready; do sleep 1; done
+
+  - name: restore cache
+    image: 'meltwater/drone-cache:v1.3.0'
+    settings:
+      archive_format: gzip
+      backend: filesystem
+      cache_key: '{{ .Repo.Name }}-{{ checksum "mix.lock" }}'
+      mount:
+        - _build
+        - deps
+      restore: true
+    volumes:
+      - name: cache
+        path: /tmp/cache
+
   - name: test
     image: 'elixir:1.13.4'
     environment:
@@ -26,7 +40,28 @@ steps:
       POSTGRES_PASS: postgres
     commands:
       - mix do local.rebar --force, local.hex --force, deps.get, deps.compile
-      - mix test --cover --trace --slowest 10
+      - make test
+
+  - name: lint
+    image: 'elixir:1.13.4'
+    commands:
+      - mix do local.rebar --force, local.hex --force, deps.get, deps.compile
+      - make static_code_analysis
+
+  - name: rebuild cache
+    image: 'meltwater/drone-cache:v1.3.0'
+    settings:
+      archive_format: gzip
+      backend: filesystem
+      cache_key: '{{ .Repo.Name }}-{{ checksum "mix.lock" }}'
+      mount:
+        - _build
+        - deps
+      rebuild: true
+      exit_code: true
+    volumes:
+      - name: cache
+        path: /tmp/cache
 
 services:
   - name: db
@@ -34,3 +69,7 @@ services:
     environment:
       POSTGRES_USER: postgres
       POSTGRES_PASSWORD: postgres
+
+volumes:
+  - name: cache
+    temp: {}

.github/workflows/ci.yml

@@ -1,142 +0,0 @@
----
-# based on:
-# 1. https://dev.to/mnishiguchi/basic-github-actions-setup-for-phoenix-apps-m3g
-# 2. https://www.jonathanyeong.com/garden/how-to-setup-ci-with-phoenix-github-actions/
-name: CI
-
-on:
-  push:
-    branches: [main]
-  pull_request:
-    brances: [main]
-
-env:
-  MIX_ENV: test
-
-jobs:
-  dependencies:
-    runs-on: ubuntu-20.04
-    strategy:
-      matrix:
-        elixir: ['1.12.1']
-        otp: ['24.0.2']
-    steps:
-      - name: cancel previous execution
-        uses: styfle/cancel-workflow-action@0.9.0
-        with:
-          access_token: ${{ github.token }}
-      - name: checkout repo
-        uses: actions/checkout@v2
-      - name: setup erlang/elixir
-        uses: erlef/setup-beam@v1
-        with:
-          elixir-version: ${{ matrix.elixir }}
-          otp-version: ${{ matrix.otp }}
-      - name: fecth cached dependencies
-        uses: actions/cache@v2
-        id: mix-cache
-        with:
-          path: |
-            deps
-            _build
-            priv/plts
-          key: ${{ runner.os }}-${{ matrix.otp }}-${{ matrix.elixir }}-${{ hashFiles('mix.lock') }}
-      - name: install dependencies
-        if: steps.mix-cache.outputs.cache-hit != 'true'
-        run: |
-          mkdir -p priv/plts
-          mix local.rebar --force
-          mix local.hex --force
-          mix deps.get
-          mix deps.compile
-          mix dialyzer --plt
-  static-code-analysis:
-    needs: dependencies
-    runs-on: ubuntu-20.04
-    strategy:
-      matrix:
-        elixir: ['1.12.1']
-        otp: ['24.0.2']
-    steps:
-      - name: cancel previous execution
-        uses: styfle/cancel-workflow-action@0.9.0
-        with:
-          access_token: ${{ github.token }}
-      - name: checkout repo
-        uses: actions/checkout@v2
-      - name: setup erlang/elixir
-        uses: erlef/setup-beam@v1
-        with:
-          elixir-version: ${{ matrix.elixir }}
-          otp-version: ${{ matrix.otp }}
-      - name: fecth cached dependencies
-        uses: actions/cache@v2
-        id: mix-cache
-        with:
-          path: |
-            deps
-            _build
-            priv/plts
-          key: ${{ runner.os }}-${{ matrix.otp }}-${{ matrix.elixir }}-${{ hashFiles('mix.lock') }}
-      - run: mix format --check-formatted
-      - name: credo analysis
-        uses: red-shirts/reviewdog-action-credo@v1
-        with:
-          github_token: ${{ secrets.github_token }}
-          reporter: github-pr-review
-      - run: mix dialyzer --no-check --quiet --ignore-exit-status --format short
-  test:
-    needs: dependencies
-    runs-on: ubuntu-20.04
-    strategy:
-      matrix:
-        elixir: ['1.12.1']
-        otp: ['24.0.2']
-    services:
-      db:
-        image: 'postgres:13.3-alpine'
-        ports:
-          - '5432:5432'
-        env:
-          POSTGRES_USER: postgres
-          POSTGRES_PASSWORD: postgres
-        options: >-
-          --health-cmd pg_isready
-          --health-interval 10s
-          --health-timeout 5s
-          --health-retries 5
-    steps:
-      - name: cancel previous execution
-        uses: styfle/cancel-workflow-action@0.9.0
-        with:
-          access_token: ${{ github.token }}
-      - name: checkout repo
-        uses: actions/checkout@v2
-      - name: setup erlang/elixir
-        uses: erlef/setup-beam@v1
-        with:
-          elixir-version: ${{ matrix.elixir }}
-          otp-version: ${{ matrix.otp }}
-      - name: fecth cached dependencies
-        uses: actions/cache@v2
-        id: mix-cache
-        with:
-          path: |
-            deps
-            _build
-            priv/plts
-          key: ${{ runner.os }}-${{ matrix.otp }}-${{ matrix.elixir }}-${{ hashFiles('mix.lock') }}
-      - run: mix test --cover --trace --slowest 10
-        env:
-          POSTGRES_USER: postgres
-          POSTGRES_PASS: postgres
-      - name: publish test results
-        uses: EnricoMi/publish-unit-test-result-action/composite@v1
-        if: always()
-        with:
-          files: 'report/test/*.xml'
-      - name: publish coverage report
-        uses: romeovs/lcov-reporter-action@v0.2.16
-        if: always()
-        with:
-          lcov-file: 'cover/lcov.info'