CI

Add GitHub action.

.github/workflows/d.yml

@@ -0,0 +1,34 @@
+# This workflow uses actions that are not certified by GitHub.
+# They are provided by a third-party and are governed by
+# separate terms of service, privacy policy, and support
+# documentation.
+name: D
+
+on:
+  push:
+    branches: [ "master" ]
+  pull_request:
+    branches: [ "master" ]
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v3
+    - uses: dlang-community/setup-dlang@4c99aa991ce7d19dd3064de0a4f2f6b2f152e2d7
+
+    - name: 'Build & Test'
+      run: |
+        # Build the project, with its main file included, without unittests
+        dub build --compiler=$DC
+        # Build and run tests, as defined by `unittest` configuration
+        # In this mode, `mainSourceFile` is excluded and `version (unittest)` are included
+        # See https://dub.pm/package-format-json.html#configurations
+        dub test --compiler=$DC
+        # Run tests
+        cd tests && rdmd test