distro/rhel8: move architecture implementation to separate file

internal/distro/rhel8/arch.go

@@ -0,0 +1,70 @@
+package rhel8
+
+import (
+	"errors"
+	"fmt"
+	"sort"
+
+	"github.com/osbuild/osbuild-composer/internal/distro"
+)
+
+type architecture struct {
+	distro           *distribution
+	name             string
+	imageTypes       map[string]distro.ImageType
+	imageTypeAliases map[string]string
+	legacy           string
+	bootType         distro.BootType
+}
+
+func (a *architecture) Name() string {
+	return a.name
+}
+
+func (a *architecture) ListImageTypes() []string {
+	itNames := make([]string, 0, len(a.imageTypes))
+	for name := range a.imageTypes {
+		itNames = append(itNames, name)
+	}
+	sort.Strings(itNames)
+	return itNames
+}
+
+func (a *architecture) GetImageType(name string) (distro.ImageType, error) {
+	t, exists := a.imageTypes[name]
+	if !exists {
+		aliasForName, exists := a.imageTypeAliases[name]
+		if !exists {
+			return nil, errors.New("invalid image type: " + name)
+		}
+		t, exists = a.imageTypes[aliasForName]
+		if !exists {
+			panic(fmt.Sprintf("image type '%s' is an alias to a non-existing image type '%s'", name, aliasForName))
+		}
+	}
+	return t, nil
+}
+
+func (a *architecture) addImageTypes(imageTypes ...imageType) {
+	if a.imageTypes == nil {
+		a.imageTypes = map[string]distro.ImageType{}
+	}
+	for idx := range imageTypes {
+		it := imageTypes[idx]
+		it.arch = a
+		a.imageTypes[it.name] = &it
+		for _, alias := range it.nameAliases {
+			if a.imageTypeAliases == nil {
+				a.imageTypeAliases = map[string]string{}
+			}
+			if existingAliasFor, exists := a.imageTypeAliases[alias]; exists {
+				panic(fmt.Sprintf("image type alias '%s' for '%s' is already defined for another image type '%s'", alias, it.name, existingAliasFor))
+			}
+			a.imageTypeAliases[alias] = it.name
+		}
+	}
+}
+
+func (a *architecture) Distro() distro.Distro {
+	return a.distro
+}

internal/distro/rhel8/distro.go

@@ -147,67 +147,6 @@ func (d *distribution) getDefaultImageConfig() *distro.ImageConfig {
 	return d.defaultImageConfig
 }
 
-type architecture struct {
-	distro           *distribution
-	name             string
-	imageTypes       map[string]distro.ImageType
-	imageTypeAliases map[string]string
-	legacy           string
-	bootType         distro.BootType
-}
-
-func (a *architecture) Name() string {
-	return a.name
-}
-
-func (a *architecture) ListImageTypes() []string {
-	itNames := make([]string, 0, len(a.imageTypes))
-	for name := range a.imageTypes {
-		itNames = append(itNames, name)
-	}
-	sort.Strings(itNames)
-	return itNames
-}
-
-func (a *architecture) GetImageType(name string) (distro.ImageType, error) {
-	t, exists := a.imageTypes[name]
-	if !exists {
-		aliasForName, exists := a.imageTypeAliases[name]
-		if !exists {
-			return nil, errors.New("invalid image type: " + name)
-		}
-		t, exists = a.imageTypes[aliasForName]
-		if !exists {
-			panic(fmt.Sprintf("image type '%s' is an alias to a non-existing image type '%s'", name, aliasForName))
-		}
-	}
-	return t, nil
-}
-
-func (a *architecture) addImageTypes(imageTypes ...imageType) {
-	if a.imageTypes == nil {
-		a.imageTypes = map[string]distro.ImageType{}
-	}
-	for idx := range imageTypes {
-		it := imageTypes[idx]
-		it.arch = a
-		a.imageTypes[it.name] = &it
-		for _, alias := range it.nameAliases {
-			if a.imageTypeAliases == nil {
-				a.imageTypeAliases = map[string]string{}
-			}
-			if existingAliasFor, exists := a.imageTypeAliases[alias]; exists {
-				panic(fmt.Sprintf("image type alias '%s' for '%s' is already defined for another image type '%s'", alias, it.name, existingAliasFor))
-			}
-			a.imageTypeAliases[alias] = it.name
-		}
-	}
-}
-
-func (a *architecture) Distro() distro.Distro {
-	return a.distro
-}
-
 type pipelinesFunc func(t *imageType, customizations *blueprint.Customizations, options distro.ImageOptions, repos []rpmmd.RepoConfig, packageSetSpecs map[string][]rpmmd.PackageSpec, containers []container.Spec, rng *rand.Rand) ([]osbuild.Pipeline, error)
 
 type packageSetFunc func(t *imageType) rpmmd.PackageSet