Fix helmfile init panic when helm returns invalid semantic version

Co-authored-by: yxxhero <11087727+yxxhero@users.noreply.github.com>

cmd/root.go

@@ -1,7 +1,6 @@
 package cmd
 
 import (
-	"fmt"
 	"os"
 
 	"github.com/spf13/cobra"
@@ -35,7 +34,8 @@ func toCLIError(g *config.GlobalImpl, err error) error {
 		case *app.Error:
 			return errors.NewExitError(e.Error(), e.Code())
 		default:
-			panic(fmt.Errorf("BUG: please file an github issue for this unhandled error: %T: %v", e, e))
+			// Handle any other error type gracefully with exit code 1
+			return errors.NewExitError(e.Error(), 1)
 		}
 	}
 	return err

cmd/root_test.go

@@ -0,0 +1,66 @@
+package cmd
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/helmfile/helmfile/pkg/config"
+	"github.com/helmfile/helmfile/pkg/errors"
+)
+
+func TestToCLIError(t *testing.T) {
+	globalCfg := &config.GlobalImpl{}
+
+	tests := []struct {
+		name     string
+		err      error
+		wantCode int
+		wantErr  bool
+	}{
+		{
+			name:    "nil error",
+			err:     nil,
+			wantErr: false,
+		},
+		{
+			name:     "regular error (like from fmt.Errorf) - this was causing the panic",
+			err:      fmt.Errorf("invalid semantic version"),
+			wantCode: 1,
+			wantErr:  true,
+		},
+		{
+			name:     "another regular error type",
+			err:      fmt.Errorf("some other error"),
+			wantCode: 1,
+			wantErr:  true,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			// This should not panic for any error type
+			defer func() {
+				if r := recover(); r != nil {
+					t.Errorf("toCLIError() panicked: %v", r)
+				}
+			}()
+
+			err := toCLIError(globalCfg, tt.err)
+
+			if (err != nil) != tt.wantErr {
+				t.Errorf("toCLIError() error = %v, wantErr %v", err, tt.wantErr)
+				return
+			}
+
+			if err != nil {
+				if exitErr, ok := err.(*errors.ExitError); ok {
+					if exitErr.ExitCode() != tt.wantCode {
+						t.Errorf("toCLIError() exit code = %v, want %v", exitErr.ExitCode(), tt.wantCode)
+					}
+				} else {
+					t.Errorf("toCLIError() returned non-ExitError: %T", err)
+				}
+			}
+		})
+	}
+}