add analyzer interface/controller and supporting package/catalog

imgbom/pkg/catalog.go

@@ -0,0 +1,18 @@
+package pkg
+
+type Catalog struct {
+	// TODO: catalog by package ID for potential indexing
+	catalog map[Type][]Package
+}
+
+type CatalogWriter interface {
+	Add(Package) error
+}
+
+func (c *Catalog) Add(p Package) {
+	_, ok := c.catalog[p.Type]
+	if !ok {
+		c.catalog[p.Type] = make([]Package, 0)
+	}
+	c.catalog[p.Type] = append(c.catalog[p.Type], p)
+}

imgbom/pkg/package.go

@@ -0,0 +1,16 @@
+package pkg
+
+import "github.com/anchore/stereoscope/pkg/file"
+
+// TODO: add package ID (random/incremental)
+
+type Package struct {
+	Name     string
+	Version  string
+	Source   []file.Reference
+	Licenses []string
+	Type     Type
+	Metadata interface{}
+}
+
+// TODO: stringer...

imgbom/pkg/type.go

@@ -0,0 +1,17 @@
+package pkg
+
+const (
+	UnknownPkg uint = iota
+	ApkPkg
+	DebPkg
+	JavaPkg
+	NodePkg
+	PacmanPkg
+	PythonPkg
+	RpmPkg
+	RubyPkg
+)
+
+type Type uint
+
+// TODO: stringer...