-
Notifications
You must be signed in to change notification settings - Fork 5
/
utils.go
48 lines (45 loc) · 1.27 KB
/
utils.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
package argparse
import (
"fmt"
"os"
"os/exec"
"strconv"
"strings"
)
func decideTerminalWidth() int {
// decide terminal width
cmd := exec.Command("stty", "size")
cmd.Stdin = os.Stdin // this is important
result, e := cmd.Output()
if e != nil {
result = []byte("0 80")
}
width := 80
parse := strings.Split(strings.TrimRight(string(result), "\n"), " ")
if w, e := strconv.Atoi(parse[1]); e == nil {
width = w
}
return width
}
func formatHelpRow(head, content string, bareHeadLength, maxHeadLength, terminalWidth int, withBreak bool) string {
content = strings.Replace(content, "\n", "", -1)
result := fmt.Sprintf(" %s ", head)
headLeftPadding := maxHeadLength - bareHeadLength - 3
if headLeftPadding > 0 { // fill left padding
result += strings.Repeat(" ", headLeftPadding)
}
contentPadding := strings.Repeat(" ", maxHeadLength)
var rows []string
if withBreak && headLeftPadding < 0 {
rows = append(rows, result, contentPadding+content)
} else {
rows = append(rows, result+content)
}
for len(rows[len(rows)-1]) > terminalWidth { // break into lines
lastIndex := len(rows) - 1
lastOne := rows[lastIndex]
rows[lastIndex] = rows[lastIndex][0:terminalWidth]
rows = append(rows, contentPadding+lastOne[terminalWidth:])
}
return strings.Join(rows, "\n")
}