Rename NewGraphicsDiscoverer as NewDRMNodesDiscoverer

This change renames NewGraphicsDiscoverer to NewDRMNodesDiscoverer and
instead calls NewGraphicsMountsDiscoverer explicitly when constructing
a graphics modifier.

This avoids the import of config.Config into the discover package
which leads to a transitive dependency on toml-specifics and
requires that the vendor/github.com/pelletier/ package
be vendored in to consumers.

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

internal/discover/graphics.go

@@ -22,7 +22,6 @@ import (
 	"path/filepath"
 	"strings"
 
-	"github.com/NVIDIA/nvidia-container-toolkit/internal/config"
 	"github.com/NVIDIA/nvidia-container-toolkit/internal/config/image"
 	"github.com/NVIDIA/nvidia-container-toolkit/internal/info/drm"
 	"github.com/NVIDIA/nvidia-container-toolkit/internal/info/proc"
@@ -31,18 +30,12 @@ import (
 	"github.com/NVIDIA/nvidia-container-toolkit/internal/lookup/cuda"
 )
 
-// NewGraphicsDiscoverer returns the discoverer for graphics tools such as Vulkan.
+// NewDRMNodesDiscoverer returns a discoverrer for the DRM device nodes associated with the specified visible devices.
-func NewGraphicsDiscoverer(logger logger.Interface, cfg *config.Config, devices image.VisibleDevices) (Discover, error) {
+//
-	driverRoot := cfg.NVIDIAContainerCLIConfig.Root
+// TODO: The logic for creating DRM devices should be consolidated between this
-	// In standard usage, the devRoot is the same as the driverRoot.
+// and the logic for generating CDI specs for a single device. This is only used
-	devRoot := driverRoot
+// when applying OCI spec modifications to an incoming spec in "legacy" mode.
-	nvidiaCTKPath := cfg.NVIDIACTKConfig.Path
+func NewDRMNodesDiscoverer(logger logger.Interface, devices image.VisibleDevices, devRoot string, nvidiaCTKPath string) (Discover, error) {
-
-	mounts, err := NewGraphicsMountsDiscoverer(logger, driverRoot, nvidiaCTKPath)
-	if err != nil {
-		return nil, fmt.Errorf("failed to create mounts discoverer: %v", err)
-	}
-
 	drmDeviceNodes, err := newDRMDeviceDiscoverer(logger, devices, devRoot)
 	if err != nil {
 		return nil, fmt.Errorf("failed to create DRM device discoverer: %v", err)
@@ -50,11 +43,7 @@ func NewGraphicsDiscoverer(logger logger.Interface, cfg *config.Config, devices
 
 	drmByPathSymlinks := newCreateDRMByPathSymlinks(logger, drmDeviceNodes, devRoot, nvidiaCTKPath)
 
-	discover := Merge(
+	discover := Merge(drmDeviceNodes, drmByPathSymlinks)
-		Merge(drmDeviceNodes, drmByPathSymlinks),
-		mounts,
-	)
-
 	return discover, nil
 }
 

internal/modifier/graphics.go

@@ -34,15 +34,34 @@ func NewGraphicsModifier(logger logger.Interface, cfg *config.Config, image imag
 		return nil, nil
 	}
 
-	d, err := discover.NewGraphicsDiscoverer(
+	driverRoot := cfg.NVIDIAContainerCLIConfig.Root
+	nvidiaCTKPath := cfg.NVIDIACTKConfig.Path
+
+	mounts, err := discover.NewGraphicsMountsDiscoverer(
+		logger,
+		driverRoot,
+		nvidiaCTKPath,
+	)
+	if err != nil {
+		return nil, fmt.Errorf("failed to create mounts discoverer: %v", err)
+	}
+
+	// In standard usage, the devRoot is the same as the driverRoot.
+	devRoot := driverRoot
+	drmNodes, err := discover.NewDRMNodesDiscoverer(
 		logger,
-		cfg,
 		image.DevicesFromEnvvars(visibleDevicesEnvvar),
+		devRoot,
+		nvidiaCTKPath,
 	)
 	if err != nil {
 		return nil, fmt.Errorf("failed to construct discoverer: %v", err)
 	}
 
+	d := discover.Merge(
+		drmNodes,
+		mounts,
+	)
 	return NewModifierFromDiscoverer(logger, d)
 }