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Using strings.Builder instead of string appending 

Signed-off-by: Li Yi <denverdino@gmail.com>
(cherry picked from commit 814ced4b30)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
This commit is contained in:
Li Yi 2018-10-09 10:33:27 +08:00 committed by Sebastiaan van Stijn
parent a80c6e1f8c
commit 9a2ede8b01
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1 changed files with 10 additions and 3 deletions
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13
cli/command/image/prune.go
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@ -3,6 +3,7 @@ package image
import (
"context"
"fmt"
"strings"
"github.com/docker/cli/cli"
"github.com/docker/cli/cli/command"
@ -73,14 +74,20 @@ func runPrune(dockerCli command.Cli, options pruneOptions) (spaceReclaimed uint6
}
if len(report.ImagesDeleted) > 0 {
output = "Deleted Images:\n"
var sb strings.Builder
sb.WriteString("Deleted Images:\n")
for _, st := range report.ImagesDeleted {
if st.Untagged != "" {
output += fmt.Sprintln("untagged:", st.Untagged)
sb.WriteString("untagged: ")
sb.WriteString(st.Untagged)
sb.WriteByte('\n')
} else {
output += fmt.Sprintln("deleted:", st.Deleted)
sb.WriteString("deleted: ")
sb.WriteString(st.Deleted)
sb.WriteByte('\n')
}
}
output = sb.String()
spaceReclaimed = report.SpaceReclaimed
}