refactor: hoist config handling in root command prerun

internal/commands/execute_workflow.go

@@ -8,13 +8,7 @@ import (
 	workflow "runner/internal/workflow"
 )
 
-func ExecuteWorkflow(configurationPath string, workflowFile string) error {
+func ExecuteWorkflow(configuration Configuration, workflowFile string) error {
-	configuration, err := NewConfigFromFile(configurationPath)
-
-	if err != nil {
-		return err
-	}
-
 	driver, err := runner.NewDriver(configuration.Containers.Driver)
 
 	if err != nil {

internal/commands/validate.go

@@ -6,7 +6,7 @@ import (
 	workflow "runner/internal/workflow"
 )
 
-func ValidateWorkflow(configurationPath string, workflowPath string) error {
+func ValidateWorkflow(configuration Configuration, workflowPath string) error {
 	workflow, err := workflow.FromYamlFile(workflowPath)
 
 	if err != nil {

main.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"context"
 	"github.com/spf13/cobra"
 	"log"
 	"os"
@@ -9,6 +10,24 @@ import (
 
 var cli = &cobra.Command{
 	Use: "runner",
+	PersistentPreRun: func(cmd *cobra.Command, args []string) {
+		configPath, err := cmd.Flags().GetString("config")
+
+		ctx := cmd.Context()
+
+		if err == nil {
+			configuration, err := commands.NewConfigFromFile(configPath)
+
+			if err != nil {
+				log.Printf("Failed to parse configuration (%s)!", configPath)
+				os.Exit(1)
+			}
+
+			ctx = context.WithValue(ctx, "config", configuration)
+		}
+
+		cmd.SetContext(ctx)
+	},
 }
 
 var execute = &cobra.Command{
@@ -16,9 +35,9 @@ var execute = &cobra.Command{
 	Short: "Executes the provided workflow.",
 	Args:  cobra.MinimumNArgs(1),
 	Run: func(cmd *cobra.Command, args []string) {
-		configPath, _ := cmd.Flags().GetString("config")
+		config := cmd.Context().Value("config").(*commands.Configuration)
 
-		if err := commands.ExecuteWorkflow(configPath, args[0]); err != nil {
+		if err := commands.ExecuteWorkflow(*config, args[0]); err != nil {
 			log.Printf("Failure: %s", err)
 			os.Exit(1)
 		}
@@ -30,9 +49,9 @@ var validate = &cobra.Command{
 	Short: "Validates the structure of the provided workflow.",
 	Args:  cobra.MinimumNArgs(1),
 	Run: func(cmd *cobra.Command, args []string) {
-		configPath, _ := cmd.Flags().GetString("config")
+		config := cmd.Context().Value("config").(*commands.Configuration)
 
-		if err := commands.ValidateWorkflow(configPath, args[0]); err != nil {
+		if err := commands.ValidateWorkflow(*config, args[0]); err != nil {
 			log.Printf("Failure: %s", err)
 			os.Exit(1)
 		}