👷 Switch over to GitHub actions (#90)

The `cimg/elixir` images available for CircleCI tend to lag those available for the `erlef/setup-beam` actions on GitHub Actions, so switch CI over to use GitHub actions.

.github/workflows/ci.yml

@@ -0,0 +1,87 @@
+name: CI
+
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+    branches: ["main"]
+
+env:
+  MIX_ENV: test
+
+permissions:
+  contents: read
+
+jobs:
+  test:
+    name: Checks/Tests on OTP ${{matrix.otp}} / Elixir ${{matrix.elixir}}
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        include:
+          - elixir: '1.12'
+            otp: '24'
+          - elixir: '1.13'
+            otp: '24'
+          - elixir: '1.14'
+            otp: '25'
+          - elixir: '1.15'
+            otp: '26'
+          - elixir: '1.16'
+            otp: '26'
+    steps:
+      - name: Set up Elixir
+        id: setup
+        uses: erlef/setup-beam@v1
+        with:
+          otp-version: ${{matrix.otp}}
+          elixir-version: ${{matrix.elixir}}
+          version-type: strict
+
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Cache dependencies
+        id: cache-deps
+        env:
+          cache-name: cache-elixir-deps
+        uses: actions/cache@v4
+        with:
+          key: ${{runner.os}}-mix-${{env.cache-name}}-${{steps.setup.outputs.otp-version}}-${{steps.setup.outputs.elixir-version}}-${{hashFiles('**/mix.lock')}}
+          path: deps
+          restore-keys: |
+            ${{runner.os}}-mix-${{env.cache-name}}-${{steps.setup.outputs.otp-version}}-${{steps.setup.outputs.elixir-version}}-
+            ${{runner.os}}-mix-${{env.cache-name}}-${{steps.setup.outputs.otp-version}}-
+            ${{runner.os}}-mix-${{env.cache-name}}-
+
+      - name: Cache compiled build
+        id: cache-build
+        env:
+          cache-name: cache-compiled-build
+        uses: actions/cache@v4
+        with:
+          key: ${{runner.os}}-mix-${{env.cache-name}}-${{steps.setup.outputs.otp-version}}-${{steps.setup.outputs.elixir-version}}-${{hashFiles('**/mix.lock')}}
+          path: _build
+          restore-keys: |
+            ${{runner.os}}-mix-${{env.cache-name}}-${{steps.setup.outputs.otp-version}}-${{steps.setup.outputs.elixir-version}}-
+            ${{runner.os}}-mix-${{env.cache-name}}-${{steps.setup.outputs.otp-version}}-
+            ${{runner.os}}-mix-${{env.cache-name}}-
+
+      - name: Clean if incremental build fails
+        if: github.run_attempt != '1'
+        run: |
+          mix deps.clean --all
+          mix clean
+
+      - name: Install dependencies
+        run: mix deps.get
+
+      - name: Compile
+        run: mix compile --warnings-as-errors
+
+      - name: Check formatting
+        if: ${{matrix.elixir == '1.16'}}
+        run: mix format --check-formatted
+
+      - name: Run tests
+        run: mix test

README.md

@@ -1,6 +1,6 @@
 # mix test.interactive
 
-[![Build Status](https://circleci.com/gh/randycoulman/mix_test_interactive.svg?style=shield)](https://app.circleci.com/pipelines/github/randycoulman/mix_test_interactive)
+[![Build Status](https://github.com/randycoulman/mix_test_interactive/actions/workflows/ci.yml/badge.svg)](https://github.com/randycoulman/mix_test_interactive/actions)
 [![Module Version](https://img.shields.io/hexpm/v/mix_test_interactive.svg)](https://hex.pm/packages/mix_test_interactive)
 [![Hex Docs](https://img.shields.io/badge/hex-docs-lightgreen.svg)](https://hexdocs.pm/mix_test_interactive/)
 [![License](https://img.shields.io/hexpm/l/mix_test_interactive.svg)](https://github.com/randycoulman/mix_test_interactive/blob/master/LICENSE.md)