Make product API versions independently installable

backend/product/architecture/versions_test.go

@@ -0,0 +1,41 @@
+package architecture
+
+import (
+	"go/parser"
+	"go/token"
+	"io/fs"
+	"path/filepath"
+	"strconv"
+	"strings"
+	"testing"
+)
+
+func TestGenericRuntimeDoesNotInstallConcreteContracts(t *testing.T) {
+	for _, dir := range []string{"../app/runtime", "../app/http"} {
+		err := filepath.WalkDir(dir, func(path string, entry fs.DirEntry, err error) error {
+			if err != nil {
+				return err
+			}
+			if entry.IsDir() || !strings.HasSuffix(path, ".go") || strings.HasSuffix(path, "_test.go") {
+				return nil
+			}
+			file, err := parser.ParseFile(token.NewFileSet(), path, nil, parser.ImportsOnly)
+			if err != nil {
+				return err
+			}
+			for _, im := range file.Imports {
+				name, err := strconv.Unquote(im.Path.Value)
+				if err != nil {
+					return err
+				}
+				if strings.Contains(name, "/http/v") || strings.Contains(name, "/app/api/v") || strings.HasSuffix(name, "/app/profile") {
+					t.Errorf("generic runtime imports a concrete API contract: %s in %s", name, path)
+				}
+			}
+			return nil
+		})
+		if err != nil {
+			t.Fatal(err)
+		}
+	}
+}