add --debug-goroutines

cmd/root.go

@@ -119,6 +119,12 @@ func Main() int {
 				Usage:       "enable HTTP debugging",
 				Destination: &conf.DebugHTTP,
 			},
+			&cli.BoolFlag{
+				Name:        "debug-goroutines",
+				Value:       false,
+				Usage:       "enable goroutine debugging",
+				Destination: &conf.DebugGoRoutines,
+			},
 			&cli.BoolFlag{
 				Name:        "align-ints",
 				Aliases:     []string{"I"},

pkg/cfg/config.go

@@ -90,6 +90,7 @@ type Config struct {
 	Force bool // ccr follower renew: -f
 
 	DebugHTTP       bool   // root: --debug-http
+	DebugGoRoutines bool   // root: --debug-goroutines
 	Separator       string // role diff: -s
 	NotDeployed     bool   // role diff: -n
 	Undefined       bool   // role diff: -u

pkg/printer/table.go

@@ -40,10 +40,15 @@ type Table struct {
 	lenHeaders      []int
 	alignInts       bool
 	maxwidth        int
+	debugGoRoutines bool
 }
 
 func NewTable(conf *cfg.Config, columns, rows int) *Table {
-	table := new(Table{Mode: conf.Output, maxwidth: cfg.GetTermWidth()})
+	table := new(Table{
+		Mode:            conf.Output,
+		maxwidth:        cfg.GetTermWidth(),
+		debugGoRoutines: conf.DebugGoRoutines,
+	})
 
 	table.Headers = make([]string, columns)
 	table.RawHeaders = make([]string, columns)
@@ -55,7 +60,11 @@ func NewTable(conf *cfg.Config, columns, rows int) *Table {
 }
 
 func NewTableEmpty(conf *cfg.Config) *Table {
-	table := new(Table{Mode: conf.Output, maxwidth: cfg.GetTermWidth()})
+	table := new(Table{
+		Mode:            conf.Output,
+		maxwidth:        cfg.GetTermWidth(),
+		debugGoRoutines: conf.DebugGoRoutines,
+	})
 	table.alignInts = conf.AlignInts
 
 	return table
@@ -75,16 +84,24 @@ func (table *Table) WithHeaders(headers ...string) *Table {
 }
 
 func (table *Table) Print() error {
+	var err error
+
 	switch table.Mode {
 	case "json":
-		return table.PrintJSON()
+		err = table.PrintJSON()
 	case "yaml":
-		return table.PrintYAML()
+		err = table.PrintYAML()
 	case "csv":
-		return table.PrintCSV()
+		err = table.PrintCSV()
 	default:
-		return table.PrintTSV()
+		err = table.PrintTSV()
 	}
+
+	if table.debugGoRoutines {
+		printGoRoutineMetrics()
+	}
+
+	return err
 }
 
 var (