Consolidate HookName functionality on internal/discover pkg

Signed-off-by: Carlos Eduardo Arango Gutierrez <eduardoa@nvidia.com>

internal/discover/hooks.go

@@ -44,6 +44,29 @@ func (h *Hook) Hooks() ([]Hook, error) {
 	return []Hook{*h}, nil
 }
 
+type HookName string
+
+// DisabledHooks allows individual hooks to be disabled.
+type DisabledHooks map[HookName]bool
+
+const (
+	// HookEnableCudaCompat refers to the hook used to enable CUDA Forward Compatibility.
+	// This was added with v1.17.5 of the NVIDIA Container Toolkit.
+	HookEnableCudaCompat = HookName("enable-cuda-compat")
+	// directory path to be mounted into a container.
+	HookCreateSymlinks = HookName("create-symlinks")
+	// HookUpdateLDCache refers to the hook used to  Update the dynamic linker
+	// cache inside the directory path to be mounted into a container.
+	HookUpdateLDCache = HookName("update-ldcache")
+)
+
+// AllHooks maintains a future-proof list of all defined hooks.
+var AllHooks = []HookName{
+	HookEnableCudaCompat,
+	HookCreateSymlinks,
+	HookUpdateLDCache,
+}
+
 // Option is a function that configures the nvcdilib
 type Option func(*CDIHook)
 
@@ -52,7 +75,7 @@ type CDIHook struct {
 }
 
 type HookCreator interface {
-	Create(string, ...string) *Hook
+	Create(HookName, ...string) *Hook
 }
 
 func NewHookCreator(nvidiaCDIHookPath string) HookCreator {
@@ -63,7 +86,7 @@ func NewHookCreator(nvidiaCDIHookPath string) HookCreator {
 	return CDIHook
 }
 
-func (c CDIHook) Create(name string, args ...string) *Hook {
+func (c CDIHook) Create(name HookName, args ...string) *Hook {
 	if name == "create-symlinks" {
 		if len(args) == 0 {
 			return nil
@@ -79,7 +102,7 @@ func (c CDIHook) Create(name string, args ...string) *Hook {
 	return &Hook{
 		Lifecycle: cdi.CreateContainerHook,
 		Path:      c.nvidiaCDIHookPath,
-		Args:      append(c.requiredArgs(name), args...),
+		Args:      append(c.requiredArgs(string(name)), args...),
 	}
 }
 

internal/discover/ldconfig.go

@@ -72,7 +72,7 @@ func createLDCacheUpdateHook(hookCreator HookCreator, ldconfig string, libraries
 		args = append(args, "--folder", f)
 	}
 
-	return hookCreator.Create("update-ldcache", args...)
+	return hookCreator.Create(HookUpdateLDCache, args...)
 }
 
 // getLibraryPaths extracts the library dirs from the specified mounts

pkg/nvcdi/api.go

@@ -21,6 +21,7 @@ import (
 	"tags.cncf.io/container-device-interface/pkg/cdi"
 	"tags.cncf.io/container-device-interface/specs-go"
 
+	"github.com/NVIDIA/nvidia-container-toolkit/internal/discover"
 	"github.com/NVIDIA/nvidia-container-toolkit/pkg/nvcdi/spec"
 )
 
@@ -36,12 +37,12 @@ type Interface interface {
 	GetDeviceSpecsByID(...string) ([]specs.Device, error)
 }
 
-// A HookName refers to one of the predefined set of CDI hooks that may be
-// included in the generated CDI specification.
-type HookName string
+// HookName is an alias for the discover.HookName type.
+type HookName = discover.HookName
 
+// Aliases for the discover.HookName constants.
 const (
-	// HookEnableCudaCompat refers to the hook used to enable CUDA Forward Compatibility.
-	// This was added with v1.17.5 of the NVIDIA Container Toolkit.
-	HookEnableCudaCompat = HookName("enable-cuda-compat")
+	HookEnableCudaCompat = discover.HookEnableCudaCompat
+	HookCreateSymlinks   = discover.HookCreateSymlinks
+	HookUpdateLDCache    = discover.HookUpdateLDCache
 )

pkg/nvcdi/driver-wsl.go

@@ -135,7 +135,7 @@ func (m nvidiaSMISimlinkHook) Hooks() ([]discover.Hook, error) {
 	}
 	link := "/usr/bin/nvidia-smi"
 	links := []string{fmt.Sprintf("%s::%s", target, link)}
-	symlinkHook := m.hookCreator.Create("create-symlinks", links...)
+	symlinkHook := m.hookCreator.Create(HookCreateSymlinks, links...)
 
 	return symlinkHook.Hooks()
 }

pkg/nvcdi/hooks.go

@@ -16,9 +16,6 @@
 
 package nvcdi
 
-// disabledHooks allows individual hooks to be disabled.
-type disabledHooks map[HookName]bool
-
 // HookIsSupported checks whether a hook of the specified name is supported.
 // Hooks must be explicitly disabled, meaning that if no disabled hooks are
 // all hooks are supported.

pkg/nvcdi/lib.go

@@ -56,14 +56,14 @@ type nvcdilib struct {
 
 	mergedDeviceOptions []transform.MergedDeviceOption
 
-	disabledHooks disabledHooks
+	disabledHooks discover.DisabledHooks
 	hookCreator   discover.HookCreator
 }
 
 // New creates a new nvcdi library
 func New(opts ...Option) (Interface, error) {
 	l := &nvcdilib{
-		disabledHooks: make(disabledHooks),
+		disabledHooks: make(discover.DisabledHooks),
 	}
 	for _, opt := range opts {
 		opt(l)