pkg/config: turn AddCompression into attributedstring.Slice

Signed-off-by: Valentin Rothberg <vrothberg@redhat.com>

common/pkg/config/config.go

@@ -428,7 +428,7 @@ type EngineConfig struct {
 	ActiveService string `toml:"active_service,omitempty"`
 
 	// Add existing instances with requested compression algorithms to manifest list
-	AddCompression []string `toml:"add_compression,omitempty"`
+	AddCompression attributedstring.Slice `toml:"add_compression,omitempty"`
 
 	// ServiceDestinations mapped by service Names
 	ServiceDestinations map[string]Destination `toml:"service_destinations,omitempty"`

common/pkg/config/config_local_test.go

@@ -501,12 +501,12 @@ var _ = Describe("Config Local", func() {
 		// Given
 		config, err := New(nil)
 		gomega.Expect(err).To(gomega.BeNil())
-		gomega.Expect(config.Engine.AddCompression).To(gomega.BeNil()) // no hard-coding to work on all platforms
+		gomega.Expect(config.Engine.AddCompression.Values).To(gomega.BeNil()) // no hard-coding to work on all platforms
 		// When
 		config2, err := NewConfig("testdata/containers_default.conf")
 		// Then
 		gomega.Expect(err).To(gomega.BeNil())
-		gomega.Expect(config2.Engine.AddCompression).To(gomega.Equal([]string{"zstd", "zstd:chunked"}))
+		gomega.Expect(config2.Engine.AddCompression.Get()).To(gomega.Equal([]string{"zstd", "zstd:chunked"}))
 	})
 
 	It("ComposeWarningLogs", func() {

common/pkg/config/config_test.go

@@ -47,7 +47,7 @@ var _ = Describe("Config", func() {
 			gomega.Expect(defaultConfig.Engine.EventsContainerCreateInspectData).To(gomega.BeFalse())
 			gomega.Expect(defaultConfig.Engine.DBBackend).To(gomega.Equal(""))
 			gomega.Expect(defaultConfig.Engine.PodmanshTimeout).To(gomega.BeEquivalentTo(30))
-			gomega.Expect(defaultConfig.Engine.AddCompression).To(gomega.BeNil())
+			gomega.Expect(defaultConfig.Engine.AddCompression.Values).To(gomega.BeNil())
 
 			path, err := defaultConfig.ImageCopyTmpDir()
 			gomega.Expect(err).To(gomega.BeNil())