Added fixed terminal width option

There might be cases where a fixed terminal width is helpful,
especially if the terminal width detection fails

cmd/root.go

@@ -27,12 +27,6 @@ import (
 	"github.com/spf13/cobra"
 )
 
-// NoColor is the gobal switch to decide whether strings should be colored in the output
-var NoColor = false
-
-// Debug is the global switch to enable debug output
-var Debug = false
-
 // rootCmd represents the base command when called without any subcommands
 var rootCmd = &cobra.Command{
 	Use:   "dyff",
@@ -57,12 +51,13 @@ func init() {
 	// Here you will define your flags and configuration settings. Cobra supports
 	// persistent flags, which, if defined here, will be global for your
 	// application.
-	rootCmd.PersistentFlags().BoolVar(&NoColor, "no-color", false, "Disable colors in output")
-	rootCmd.PersistentFlags().BoolVar(&Debug, "debug", false, "Disable colors in output")
+	rootCmd.PersistentFlags().BoolVar(&core.NoColor, "no-color", false, "Disable colors in output")
+	rootCmd.PersistentFlags().BoolVar(&core.DebugMode, "debug", false, "Disable colors in output")
+	rootCmd.PersistentFlags().IntVar(&core.FixedTerminalWidth, "fixed-terminal-width", -1, "Disables terminal width detection by using fixed provided value")
 }
 
 func initSettings() {
-	if NoColor {
+	if core.NoColor {
 		color.NoColor = true
 		yaml.HighlightKeys = false
 	}

core/core.go

@@ -40,6 +40,15 @@ import (
 	"golang.org/x/crypto/ssh/terminal"
 )
 
+// DebugMode is the global switch to enable debug output
+var DebugMode = false
+
+// NoColor is the gobal switch to decide whether strings should be colored in the output
+var NoColor = false
+
+// FixedTerminalWidth disables terminal width detection and reset it with a fixed given value
+var FixedTerminalWidth = -1
+
 // Debug log output
 var Debug = log.New(os.Stdout, "DEBUG: ", log.Ldate|log.Ltime|log.Lshortfile)
 
@@ -96,6 +105,10 @@ func ExitWithError(text string, err error) {
 }
 
 func GetTerminalWidth() int {
+	if FixedTerminalWidth > 0 {
+		return FixedTerminalWidth
+	}
+
 	termWidth, _, err := terminal.GetSize(int(os.Stdout.Fd()))
 	if err != nil {
 		return 80

core/core_suite_test.go

@@ -42,6 +42,10 @@ func TestCore(t *testing.T) {
 var _ = BeforeSuite(func() {
 	yaml.HighlightKeys = false
 	color.NoColor = true
+
+	core.NoColor = false
+	core.DebugMode = false
+	core.FixedTerminalWidth = 80
 })
 
 func yml(input string) yaml.MapSlice {