Add packageset

pkg/package/package.go

@@ -52,6 +52,29 @@ type Package interface {
 	GetUses() []string
 }
 
+type PackageSet interface {
+	GetPackages() []Package
+	AddPackages(pkgs []Package)
+}
+
+type DefaultPackages struct {
+	Packages []Package
+}
+
+type Tree interface {
+	GetPackageSet() PackageSet
+}
+
+func (pkgs *DefaultPackages) GetPackages() []Package {
+	return pkgs.Packages
+}
+
+func (p *DefaultPackages) AddPackages(pkgs []Package) {
+	p.Packages = append(p.Packages, pkgs...)
+}
+
+func NewPackages(p []Package) PackageSet { return &DefaultPackages{Packages: p} }
+
 // DefaultPackage represent a standard package definition
 type DefaultPackage struct {
 	Name             string

pkg/package/package_test.go

@@ -16,7 +16,6 @@
 package pkg_test
 
 import (
-	"github.com/crillab/gophersat/bf"
 	. "github.com/mudler/luet/pkg/package"
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
@@ -84,7 +83,7 @@ var _ = Describe("Package", func() {
 			a1 := NewPackage("A", "1.0", []*DefaultPackage{}, []*DefaultPackage{})
 			f, err := a1.BuildFormula()
 			Expect(err).ToNot(HaveOccurred())
-			Expect(f).To(Equal([]bf.Formula(nil)))
+			Expect(f).To(BeNil())
 		})
 		It("builds constraints correctly", func() {
 			a11 := NewPackage("A", "1.1", []*DefaultPackage{}, []*DefaultPackage{})