Merge pull request #452 from homeport/fix/panic

Fix panic when exit code does not have a cause

Author: HeavyWombat

cmd/dyff/main.go

@@ -44,7 +44,7 @@ func main() {
 
 			} else {
 				headline = "Error occurred"
-				content = err.Cause().Error()
+				content = err.Error()
 			}
 
 			fmt.Fprint(
@@ -59,7 +59,7 @@ func main() {
 
 			os.Exit(err.Value())
 
-		default: // fail safe for somehow an non exit code error slips through
+		default: // fail safe for when somehow a non exit-code error slips through
 			fmt.Fprint(os.Stderr, err.Error())
 			os.Exit(1)
 		}

internal/cmd/exitcode.go

@@ -0,0 +1,52 @@
+// Copyright © 2025 The Homeport Team
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+package cmd
+
+// ExitCode is an error interface that has exit code (value) details
+type ExitCode interface {
+	Value() int
+	Cause() error
+	Error() string
+}
+
+// errorWithExitCode is just a way to transport the exit code to the main package
+type errorWithExitCode struct {
+	value int
+	cause error
+}
+
+var _ ExitCode = errorWithExitCode{}
+
+func (e errorWithExitCode) Value() int {
+	return e.value
+}
+
+func (e errorWithExitCode) Cause() error {
+	return e.cause
+}
+
+func (e errorWithExitCode) Error() string {
+	if e.cause != nil {
+		return e.cause.Error()
+	}
+
+	return ""
+}

internal/cmd/root.go

@@ -31,37 +31,6 @@ import (
 	"github.com/spf13/cobra"
 )
 
-// ExitCode is an error interface that has exit code (value) details
-type ExitCode interface {
-	Value() int
-	Cause() error
-	Error() string
-}
-
-// errorWithExitCode is just a way to transport the exit code to the main package
-type errorWithExitCode struct {
-	value int
-	cause error
-}
-
-var _ ExitCode = errorWithExitCode{}
-
-func (e errorWithExitCode) Value() int {
-	return e.value
-}
-
-func (e errorWithExitCode) Cause() error {
-	return e.cause
-}
-
-func (e errorWithExitCode) Error() string {
-	if e.cause != nil {
-		return e.cause.Error()
-	}
-
-	return ""
-}
-
 var name = func() string {
 	ep, err := os.Executable()
 	if err != nil {