From eb104ce5c8567624927dbf0cfe0a85237b574973 Mon Sep 17 00:00:00 2001
From: Dominik Schmidt <dev@dominik-schmidt.de>
Date: Fri, 21 Nov 2025 01:57:57 +0100
Subject: [PATCH] feat(print-env): add output format validation

Signed-off-by: Dominik Schmidt <dev@dominik-schmidt.de>
---
 pkg/config/print_env.go | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/pkg/config/print_env.go b/pkg/config/print_env.go
index eef9333b..b4d6d3a0 100644
--- a/pkg/config/print_env.go
+++ b/pkg/config/print_env.go
@@ -1,5 +1,7 @@
 package config
 
+import "fmt"
+
 // PrintEnvOptions is the options for the print-env command
 type PrintEnvOptions struct {
 	// Output is the output format (yaml or json)
@@ -31,3 +33,11 @@ func NewPrintEnvImpl(g *GlobalImpl, p *PrintEnvOptions) *PrintEnvImpl {
 func (c *PrintEnvImpl) Output() string {
 	return c.PrintEnvOptions.Output
 }
+
+// ValidateConfig validates the print-env configuration
+func (c *PrintEnvImpl) ValidateConfig() error {
+	if c.PrintEnvOptions.Output != "yaml" && c.PrintEnvOptions.Output != "json" {
+		return fmt.Errorf("invalid output format %q: must be 'yaml' or 'json'", c.PrintEnvOptions.Output)
+	}
+	return nil
+}