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fix system df crashes on unnamed images

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if the image is unnamed, pass an nil slice to the parse repotags function instead of getting the image name by index.

after this patch, unnamed images will be shown as <none>

```
Images space usage:

REPOSITORY                    TAG      IMAGE ID       CREATED        SIZE     SHARED SIZE   UNIQUE SIZE   CONTAINERS
docker.io/library/ubuntu      bionic   3556258649b2   11 days ago    66.6MB   0B            66.6MB        0
<none>                        <none>   dd8a8db2c79b   11 days ago    986MB    66.6MB        919MB         0

```

Signed-off-by: Qi Wang <qiwan@redhat.com>
This commit is contained in:
Qi Wang
2019-08-04 09:53:14 -04:00
parent 140e08ef64
commit 1da897d505
1 changed files with 4 additions and 4 deletions
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8
cmd/podman/system_df.go
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@ -460,11 +460,11 @@ func getImageVerboseDiskUsage(ctx context.Context, images []*image.Image, images
}
var repo string
var tag string
if len(img.Names()) == 0 {
repo = "<none>"
tag = "<none>"
var repotags []string
if len(img.Names()) != 0 {
repotags = []string{img.Names()[0]}
}
repopairs, err := image.ReposToMap([]string{img.Names()[0]})
repopairs, err := image.ReposToMap(repotags)
if err != nil {
logrus.Errorf("error finding tag/digest for %s", img.ID())
}