4593d0a641
- script/vendor received an update in order to work with Glide - import paths have been rewritten to work with GO15VENDOREXPERIMENT
66 lines
1.4 KiB
Go
66 lines
1.4 KiB
Go
package progress
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import (
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"fmt"
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"io"
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"runtime"
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"strings"
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"github.com/olekukonko/ts"
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)
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// Indeterminate progress indicator 'spinner'
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type Spinner struct {
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stage int
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msg string
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}
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var spinnerChars = []byte{'|', '/', '-', '\\'}
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// Print a spinner (stage) to out followed by msg (no linefeed)
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func (s *Spinner) Print(out io.Writer, msg string) {
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s.msg = msg
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s.Spin(out)
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}
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// Just spin the spinner one more notch & use the last message
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func (s *Spinner) Spin(out io.Writer) {
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s.stage = (s.stage + 1) % len(spinnerChars)
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s.update(out, string(spinnerChars[s.stage]), s.msg)
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}
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// Finish the spinner with a completion message & newline
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func (s *Spinner) Finish(out io.Writer, finishMsg string) {
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s.msg = finishMsg
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s.stage = 0
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var sym string
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if runtime.GOOS == "windows" {
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// Windows console sucks, can't do nice check mark except in ConEmu (not cmd or git bash)
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// So play it safe & boring
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sym = "*"
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} else {
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sym = fmt.Sprintf("%c", '\u2714')
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}
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s.update(out, sym, finishMsg)
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out.Write([]byte{'\n'})
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}
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func (s *Spinner) update(out io.Writer, prefix, msg string) {
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str := fmt.Sprintf("%v %v", prefix, msg)
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width := 80 // default to 80 chars wide if ts.GetSize() fails
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size, err := ts.GetSize()
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if err == nil {
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width = size.Col()
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}
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padding := strings.Repeat(" ", width-len(str))
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fmt.Fprintf(out, "\r%v%v", str, padding)
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}
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func NewSpinner() *Spinner {
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return &Spinner{}
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}
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