managers: Add dnf support

Signed-off-by: Thomas Hipp <thomas.hipp@canonical.com>

managers/dnf.go

@@ -0,0 +1,28 @@
+package managers
+
+// NewDnf creates a new Manager instance.
+func NewDnf() *Manager {
+	return &Manager{
+		command: "dnf",
+		flags: ManagerFlags{
+			global: []string{
+				"-y",
+			},
+			install: []string{
+				"install",
+			},
+			remove: []string{
+				"remove",
+			},
+			refresh: []string{
+				"makecache",
+			},
+			update: []string{
+				"upgrade",
+			},
+			clean: []string{
+				"clean", "all",
+			},
+		},
+	}
+}

managers/manager.go

@@ -27,14 +27,16 @@ type Manager struct {
 // Get returns a Manager specified by name.
 func Get(name string) *Manager {
 	switch name {
+	case "apk":
+		return NewApk()
 	case "apt":
 		return NewApt()
+	case "dnf":
+		return NewDnf()
 	case "pacman":
 		return NewPacman()
 	case "yum":
 		return NewYum()
-	case "apk":
-		return NewApk()
 	}
 
 	return nil

shared/definition.go

@@ -196,8 +196,9 @@ func (d *Definition) Validate() error {
 	validManagers := []string{
 		"apk",
 		"apt",
-		"yum",
+		"dnf",
 		"pacman",
+		"yum",
 	}
 	if !shared.StringInSlice(strings.TrimSpace(d.Packages.Manager), validManagers) {
 		return fmt.Errorf("packages.manager must be one of %v", validManagers)