Add formatting check to CI (#565)

Author: greg-rychlewski

.formatter.exs

@@ -31,5 +31,5 @@ locals_without_parens = [
   export: [
     locals_without_parens: locals_without_parens
   ],
-  inputs: []
+  inputs: ["{lib,test}/**/*.{ex,exs}"]
 ]

.github/workflows/ci.yml

@@ -8,13 +8,14 @@ jobs:
       fail-fast: false
       matrix:
         elixirbase:
-          - "1.13.4-erlang-24.3.4.2-alpine-3.16.0"
-          - "1.13.4-erlang-22.3.4.20-alpine-3.14.0"
+          - image: "1.13.4-erlang-24.3.4.2-alpine-3.16.0"
+            lint: lint
+          - image: "1.13.4-erlang-22.3.4.20-alpine-3.14.0"
     steps:
       - uses: earthly/actions-setup@v1
       - uses: actions/checkout@v3
       - name: test ecto_sql
-        run: earthly -P --ci --build-arg ELIXIR_BASE=${{matrix.elixirbase}} +test
+        run: earthly -P --ci --build-arg LINT=${{matrix.elixirbase.lint}} --build-arg ELIXIR_BASE=${{matrix.elixirbase.image}} +test
   test-postgres:
     name: postgres integration test
     runs-on: ubuntu-latest

Earthfile

@@ -17,6 +17,8 @@ test:
     RUN MIX_ENV=test mix deps.compile
     COPY --dir bench integration_test lib test ./
 
+    ARG LINT
+    RUN if [ "$LINT" == "lint" ]; then mix format --check-formatted; fi
     RUN mix deps.get && mix deps.unlock --check-unused
     RUN mix deps.compile
     RUN mix compile #--warnings-as-errors