add CSV output support

pkg/printer/table.go

@@ -32,6 +32,7 @@ import (
 type Table struct {
 	Mode       string // tsv, json, yaml
 	Headers    []string
+	RawHeaders []string
 	Entries    [][]any
 
 	rows       [][]string // representation used for printing
@@ -45,6 +46,7 @@ func NewTable(conf *cfg.Config, columns, rows int) *Table {
 	table := Table{Mode: conf.Output, maxwidth: cfg.GetTermWidth()}
 
 	table.Headers = make([]string, columns)
+	table.RawHeaders = make([]string, columns)
 	table.Entries = make([][]any, rows)
 	table.lenHeaders = make([]int, columns)
 	table.alignInts = conf.AlignInts
@@ -65,6 +67,7 @@ func (table *Table) WithHeaders(headers ...string) *Table {
 	table.Entries = [][]any{}
 	table.lenHeaders = make([]int, count)
 	table.Headers = make([]string, count)
+	table.RawHeaders = make([]string, count)
 
 	table.Addheaders(headers...)
 
@@ -77,6 +80,8 @@ func (table *Table) Print() error {
 		return table.PrintJSON()
 	case "yaml":
 		return table.PrintYAML()
+	case "csv":
+		return table.PrintCSV()
 	default:
 		return table.PrintTSV()
 	}
@@ -178,6 +183,28 @@ func (table *Table) PrintTSV() error {
 	return nil
 }
 
+func (table *Table) PrintCSV() error {
+	table.preprocessRows()
+
+	fmt.Println(strings.Join(table.RawHeaders, ","))
+
+	for _, entries := range table.rows {
+		row := make([]string, len(entries))
+
+		for idx, entry := range entries {
+			if strings.Contains(entry, " ") || strings.Contains(entry, ",") {
+				row[idx] = `"` + entry + `"`
+			} else {
+				row[idx] = entry
+			}
+		}
+
+		fmt.Println(strings.Join(row, ","))
+	}
+
+	return nil
+}
+
 func (table *Table) Sort() {
 	// sanity checks
 	if len(table.Entries) == 0 {
@@ -199,6 +226,8 @@ func (table *Table) Addheaders(headers ...string) {
 		default:
 			table.Headers[idx] = bold(strings.ReplaceAll(strings.ToUpper(header), " ", "-"))
 		}
+
+		table.RawHeaders[idx] = header
 	}
 }