Pretty print errors (#64)

CHANGELOG.md

@@ -9,6 +9,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+
+- Pretty print errors.
+
 ### Changed
 
 - Remove helmclient.MergeValue functions usage.
@@ -54,7 +58,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 
-- Use apiextensions v3 and include replace for Giant Swarm CAPI fork. 
+- Use apiextensions v3 and include replace for Giant Swarm CAPI fork.
 - Add replace for moby v20.10.0-beta1 to fix build issue on darwin.
 - Optimize apps wait interval as app-operator has a status webhook.
 - Use new catalog URL for Helm Stable.

main.go

@@ -3,6 +3,7 @@ package main
 import (
 	"context"
 	"fmt"
+	"os"
 
 	"github.com/giantswarm/microerror"
 	"github.com/giantswarm/micrologger"
@@ -14,7 +15,8 @@ import (
 func main() {
 	err := mainE(context.Background())
 	if err != nil {
-		panic(fmt.Sprintf("%#v\n", err))
+		fmt.Fprintf(os.Stderr, "Error: %s\n", microerror.Pretty(err, true))
+		os.Exit(2)
 	}
 }
 
@@ -43,6 +45,9 @@ func mainE(ctx context.Context) error {
 		}
 	}
 
+	rootCommand.SilenceErrors = true
+	rootCommand.SilenceUsage = true
+
 	err = rootCommand.Execute()
 	if err != nil {
 		return microerror.Mask(err)