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progress bar: don't strings.Repeat a negative number

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Docker-DCO-1.1-Signed-off-by: Vincent Batts <vbatts@redhat.com> (github: vbatts)
Upstream-commit: 77237be0e23dfaba4d4d97a525c3ecc7fb819042
Component: engine
This commit is contained in:
Vincent Batts
2014-07-28 12:01:43 -04:00
parent 3fc02efa64
commit ddd05d0cc1
1 changed files with 6 additions and 1 deletions
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7
components/engine/utils/jsonmessage.go
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@ -50,7 +50,12 @@ func (p *JSONProgress) String() string {
total := units.HumanSize(int64(p.Total))
percentage := int(float64(p.Current)/float64(p.Total)*100) / 2
if width > 110 {
pbBox = fmt.Sprintf("[%s>%s] ", strings.Repeat("=", percentage), strings.Repeat(" ", 50-percentage))
// this number can't be negetive gh#7136
numSpaces := 0
if 50-percentage > 0 {
numSpaces = 50 - percentage
}
pbBox = fmt.Sprintf("[%s>%s] ", strings.Repeat("=", percentage), strings.Repeat(" ", numSpaces))
}
numbersBox = fmt.Sprintf("%8v/%v", current, total)