Return raw spec from Spec.Load

Signed-off-by: Evan Lezar <elezar@nvidia.com>

cmd/nvidia-container-runtime/modifier/experimental.go

@@ -46,7 +46,8 @@ const (
 // NewExperimentalModifier creates a modifier that applies the experimental
 // modications to an OCI spec if required by the runtime wrapper.
 func NewExperimentalModifier(logger *logrus.Logger, cfg *config.Config, ociSpec oci.Spec) (oci.SpecModifier, error) {
-	if err := ociSpec.Load(); err != nil {
+	_, err := ociSpec.Load()
+	if err != nil {
 		return nil, fmt.Errorf("failed to load OCI spec: %v", err)
 	}
 

internal/oci/spec.go

@@ -33,7 +33,7 @@ type SpecModifier interface {
 //go:generate moq -stub -out spec_mock.go . Spec
 // Spec defines the operations to be performed on an OCI specification
 type Spec interface {
-	Load() error
+	Load() (*specs.Spec, error)
 	Flush() error
 	Modify(SpecModifier) error
 	LookupEnv(string) (string, bool)

internal/oci/spec_file.go

@@ -45,19 +45,19 @@ func NewFileSpec(filepath string) Spec {
 
 // Load reads the contents of an OCI spec from file to be referenced internally.
 // The file is opened "read-only"
-func (s *fileSpec) Load() error {
+func (s *fileSpec) Load() (*specs.Spec, error) {
 	specFile, err := os.Open(s.path)
 	if err != nil {
-		return fmt.Errorf("error opening OCI specification file: %v", err)
+		return nil, fmt.Errorf("error opening OCI specification file: %v", err)
 	}
 	defer specFile.Close()
 
 	spec, err := LoadFrom(specFile)
 	if err != nil {
-		return fmt.Errorf("error loading OCI specification from file: %v", err)
+		return nil, fmt.Errorf("error loading OCI specification from file: %v", err)
 	}
 	s.Spec = spec
-	return nil
+	return s.Spec, nil
 }
 
 // LoadFrom reads the contents of the OCI spec from the specified io.Reader.

internal/oci/spec_memory.go

@@ -37,8 +37,8 @@ func NewMemorySpec(spec *specs.Spec) Spec {
 }
 
 // Load is a no-op for the memorySpec spec
-func (s *memorySpec) Load() error {
+func (s *memorySpec) Load() (*specs.Spec, error) {
-	return nil
+	return s.Spec, nil
 }
 
 // Flush is a no-op for the memorySpec spec

internal/oci/spec_mock.go

@@ -4,6 +4,7 @@
 package oci
 
 import (
+	"github.com/opencontainers/runtime-spec/specs-go"
 	"sync"
 )
 
@@ -20,7 +21,7 @@ var _ Spec = &SpecMock{}
 // 			FlushFunc: func() error {
 // 				panic("mock out the Flush method")
 // 			},
-// 			LoadFunc: func() error {
+// 			LoadFunc: func() (*specs.Spec, error) {
 // 				panic("mock out the Load method")
 // 			},
 // 			LookupEnvFunc: func(s string) (string, bool) {
@@ -40,7 +41,7 @@ type SpecMock struct {
 	FlushFunc func() error
 
 	// LoadFunc mocks the Load method.
-	LoadFunc func() error
+	LoadFunc func() (*specs.Spec, error)
 
 	// LookupEnvFunc mocks the LookupEnv method.
 	LookupEnvFunc func(s string) (string, bool)
@@ -103,7 +104,7 @@ func (mock *SpecMock) FlushCalls() []struct {
 }
 
 // Load calls LoadFunc.
-func (mock *SpecMock) Load() error {
+func (mock *SpecMock) Load() (*specs.Spec, error) {
 	callInfo := struct {
 	}{}
 	mock.lockLoad.Lock()
@@ -111,9 +112,10 @@ func (mock *SpecMock) Load() error {
 	mock.lockLoad.Unlock()
 	if mock.LoadFunc == nil {
 		var (
+			specOut *specs.Spec
 			errOut  error
 		)
-		return errOut
+		return specOut, errOut
 	}
 	return mock.LoadFunc()
 }

internal/runtime/runtime_modifier.go

@@ -68,7 +68,7 @@ func (r *modifyingRuntimeWrapper) Exec(args []string) error {
 
 // modify loads, modifies, and flushes the OCI specification using the defined Modifier
 func (r *modifyingRuntimeWrapper) modify() error {
-	err := r.ociSpec.Load()
+	_, err := r.ociSpec.Load()
 	if err != nil {
 		return fmt.Errorf("error loading OCI specification for modification: %v", err)
 	}