Move bundle variable code into a func

Signed-off-by: Mikalai Radchuk <mradchuk@redhat.com>

internal/resolution/variablesources/bundle.go

@@ -5,59 +5,32 @@ import (
 	"fmt"
 	"sort"
 
+	"k8s.io/apimachinery/pkg/util/sets"
+
 	"github.com/operator-framework/deppy/pkg/deppy"
 	"github.com/operator-framework/deppy/pkg/deppy/input"
-	"k8s.io/apimachinery/pkg/util/sets"
 
 	"github.com/operator-framework/operator-controller/internal/catalogmetadata"
 	catalogfilter "github.com/operator-framework/operator-controller/internal/catalogmetadata/filter"
 	catalogsort "github.com/operator-framework/operator-controller/internal/catalogmetadata/sort"
 	olmvariables "github.com/operator-framework/operator-controller/internal/resolution/variables"
 )
 
-var _ input.VariableSource = &BundlesAndDepsVariableSource{}
-
-type BundlesAndDepsVariableSource struct {
-	catalogClient   BundleProvider
-	variableSources []input.VariableSource
-}
-
-func NewBundlesAndDepsVariableSource(catalogClient BundleProvider, inputVariableSources ...input.VariableSource) *BundlesAndDepsVariableSource {
-	return &BundlesAndDepsVariableSource{
-		catalogClient:   catalogClient,
-		variableSources: inputVariableSources,
-	}
-}
-
-func (b *BundlesAndDepsVariableSource) GetVariables(ctx context.Context) ([]deppy.Variable, error) {
-	var variables []deppy.Variable
-
-	// extract required package variables
-	for _, variableSource := range b.variableSources {
-		inputVariables, err := variableSource.GetVariables(ctx)
-		if err != nil {
-			return nil, err
-		}
-		variables = append(variables, inputVariables...)
-	}
-
-	// create bundle queue for dependency resolution
+func MakeBundleVariables(
+	allBundles []*catalogmetadata.Bundle,
+	requiredPackages []*olmvariables.RequiredPackageVariable,
+	installedPackages []*olmvariables.InstalledPackageVariable,
+) ([]*olmvariables.BundleVariable, error) {
 	var bundleQueue []*catalogmetadata.Bundle
-	for _, variable := range variables {
-		switch v := variable.(type) {
-		case *olmvariables.RequiredPackageVariable:
-			bundleQueue = append(bundleQueue, v.Bundles()...)
-		case *olmvariables.InstalledPackageVariable:
-			bundleQueue = append(bundleQueue, v.Bundles()...)
-		}
+	for _, variable := range requiredPackages {
+		bundleQueue = append(bundleQueue, variable.Bundles()...)
 	}
-
-	allBundles, err := b.catalogClient.Bundles(ctx)
-	if err != nil {
-		return nil, err
+	for _, variable := range installedPackages {
+		bundleQueue = append(bundleQueue, variable.Bundles()...)
 	}
 
 	// build bundle and dependency variables
+	var result []*olmvariables.BundleVariable
 	visited := sets.Set[deppy.Identifier]{}
 	for len(bundleQueue) > 0 {
 		// pop head of queue
@@ -73,7 +46,7 @@ func (b *BundlesAndDepsVariableSource) GetVariables(ctx context.Context) ([]depp
 		visited.Insert(id)
 
 		// get bundle dependencies
-		dependencies, err := b.filterBundleDependencies(allBundles, head)
+		dependencies, err := filterBundleDependencies(allBundles, head)
 		if err != nil {
 			return nil, fmt.Errorf("could not determine dependencies for bundle with id '%s': %w", id, err)
 		}
@@ -82,21 +55,23 @@ func (b *BundlesAndDepsVariableSource) GetVariables(ctx context.Context) ([]depp
 		bundleQueue = append(bundleQueue, dependencies...)
 
 		// create variable
-		variables = append(variables, olmvariables.NewBundleVariable(head, dependencies))
+		result = append(result, olmvariables.NewBundleVariable(head, dependencies))
 	}
 
-	return variables, nil
+	return result, nil
 }
 
-func (b *BundlesAndDepsVariableSource) filterBundleDependencies(allBundles []*catalogmetadata.Bundle, bundle *catalogmetadata.Bundle) ([]*catalogmetadata.Bundle, error) {
+func filterBundleDependencies(allBundles []*catalogmetadata.Bundle, bundle *catalogmetadata.Bundle) ([]*catalogmetadata.Bundle, error) {
 	var dependencies []*catalogmetadata.Bundle
 	added := sets.Set[deppy.Identifier]{}
 
 	// gather required package dependencies
-	// todo(perdasilva): disambiguate between not found and actual errors
 	requiredPackages, _ := bundle.RequiredPackages()
 	for _, requiredPackage := range requiredPackages {
-		packageDependencyBundles := catalogfilter.Filter(allBundles, catalogfilter.And(catalogfilter.WithPackageName(requiredPackage.PackageName), catalogfilter.InBlangSemverRange(requiredPackage.SemverRange)))
+		packageDependencyBundles := catalogfilter.Filter(allBundles, catalogfilter.And(
+			catalogfilter.WithPackageName(requiredPackage.PackageName),
+			catalogfilter.InBlangSemverRange(requiredPackage.SemverRange),
+		))
 		if len(packageDependencyBundles) == 0 {
 			return nil, fmt.Errorf("could not find package dependencies for bundle '%s'", bundle.Name)
 		}
@@ -117,3 +92,53 @@ func (b *BundlesAndDepsVariableSource) filterBundleDependencies(allBundles []*ca
 
 	return dependencies, nil
 }
+
+type BundlesAndDepsVariableSource struct {
+	catalogClient   BundleProvider
+	variableSources []input.VariableSource
+}
+
+func NewBundlesAndDepsVariableSource(catalogClient BundleProvider, inputVariableSources ...input.VariableSource) *BundlesAndDepsVariableSource {
+	return &BundlesAndDepsVariableSource{
+		catalogClient:   catalogClient,
+		variableSources: inputVariableSources,
+	}
+}
+
+func (b *BundlesAndDepsVariableSource) GetVariables(ctx context.Context) ([]deppy.Variable, error) {
+	var variables []deppy.Variable
+
+	for _, variableSource := range b.variableSources {
+		inputVariables, err := variableSource.GetVariables(ctx)
+		if err != nil {
+			return nil, err
+		}
+		variables = append(variables, inputVariables...)
+	}
+
+	allBundles, err := b.catalogClient.Bundles(ctx)
+	if err != nil {
+		return nil, err
+	}
+
+	requiredPackages := []*olmvariables.RequiredPackageVariable{}
+	installedPackages := []*olmvariables.InstalledPackageVariable{}
+	for _, variable := range variables {
+		switch v := variable.(type) {
+		case *olmvariables.RequiredPackageVariable:
+			requiredPackages = append(requiredPackages, v)
+		case *olmvariables.InstalledPackageVariable:
+			installedPackages = append(installedPackages, v)
+		}
+	}
+
+	bundles, err := MakeBundleVariables(allBundles, requiredPackages, installedPackages)
+	if err != nil {
+		return nil, err
+	}
+
+	for _, v := range bundles {
+		variables = append(variables, v)
+	}
+	return variables, nil
+}