[no-relnote] Rename config constants

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

Author: elezar

internal/config/config.go

@@ -32,9 +32,9 @@ import (
 
 const (
 	FilePathOverrideEnvVar = "NVIDIA_CTK_CONFIG_FILE_PATH"
+	RelativeFilePath       = "nvidia-container-runtime/config.toml"
 
-	configOverride = "XDG_CONFIG_HOME"
-	configFilePath = "nvidia-container-runtime/config.toml"
+	configRootOverride = "XDG_CONFIG_HOME"
 
 	nvidiaCTKExecutable          = "nvidia-ctk"
 	nvidiaCTKDefaultFilePath     = "/usr/bin/nvidia-ctk"
@@ -79,11 +79,12 @@ func GetConfigFilePath() string {
 	if configFilePathOverride := os.Getenv(FilePathOverrideEnvVar); configFilePathOverride != "" {
 		return configFilePathOverride
 	}
-	if XDGConfigDir := os.Getenv(configOverride); len(XDGConfigDir) != 0 {
-		return filepath.Join(XDGConfigDir, configFilePath)
+	configRoot := "/etc"
+	if XDGConfigDir := os.Getenv(configRootOverride); len(XDGConfigDir) != 0 {
+		configRoot = XDGConfigDir
 	}
 
-	return filepath.Join("/etc", configFilePath)
+	return filepath.Join(configRoot, RelativeFilePath)
 }
 
 // GetConfig sets up the config struct. Values are read from a toml file

internal/config/config_test.go

@@ -27,9 +27,26 @@ import (
 
 func TestGetConfigWithCustomConfig(t *testing.T) {
 	testDir := t.TempDir()
-	t.Setenv(configOverride, testDir)
+	t.Setenv(configRootOverride, testDir)
 
-	filename := filepath.Join(testDir, configFilePath)
+	filename := filepath.Join(testDir, RelativeFilePath)
+
+	// By default debug is disabled
+	contents := []byte("[nvidia-container-runtime]\ndebug = \"/nvidia-container-toolkit.log\"")
+
+	require.NoError(t, os.MkdirAll(filepath.Dir(filename), 0766))
+	require.NoError(t, os.WriteFile(filename, contents, 0600))
+
+	cfg, err := GetConfig()
+	require.NoError(t, err)
+	require.Equal(t, "/nvidia-container-toolkit.log", cfg.NVIDIAContainerRuntimeConfig.DebugFilePath)
+}
+
+func TestGetConfigWithConfigFilePathOverride(t *testing.T) {
+	testDir := t.TempDir()
+	filename := filepath.Join(testDir, RelativeFilePath)
+
+	t.Setenv(FilePathOverrideEnvVar, filename)
 
 	// By default debug is disabled
 	contents := []byte("[nvidia-container-runtime]\ndebug = \"/nvidia-container-toolkit.log\"")