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Add --latest, -l to 'podman diff'

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The man page of 'podman diff' claims that the diff sub-command knows
about --latest, -l. This adds support, as described in the man-page, to
the diff sub-command for --latest, -l.

Signed-off-by: Adrian Reber <areber@redhat.com>
This commit is contained in:
Adrian Reber
2019-06-21 11:31:38 +00:00
parent f446ccf0b0
commit 1e706a021d
3 changed files with 28 additions and 2 deletions
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15
cmd/podman/diff.go
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@@ -60,8 +60,10 @@ func init() {
flags.BoolVar(&diffCommand.Archive, "archive", true, "Save the diff as a tar archive")
flags.StringVar(&diffCommand.Format, "format", "", "Change the output format")
flags.BoolVarP(&diffCommand.Latest, "latest", "l", false, "Act on the latest container podman is aware of")
flags.MarkHidden("archive")
markFlagHiddenForRemoteClient("latest", flags)
}
@@ -83,7 +85,7 @@ func formatJSON(output []diffOutputParams) (diffJSONOutput, error) {
}
func diffCmd(c *cliconfig.DiffValues) error {
if len(c.InputArgs) != 1 {
if len(c.InputArgs) != 1 && !c.Latest {
return errors.Errorf("container, image, or layer name must be specified: podman diff [options [...]] ID-NAME")
}
@@ -93,7 +95,16 @@ func diffCmd(c *cliconfig.DiffValues) error {
}
defer runtime.Shutdown(false)
to := c.InputArgs[0]
var to string
if c.Latest {
ctr, err := runtime.GetLatestContainer()
if err != nil {
return errors.Wrapf(err, "unable to get latest container")
}
to = ctr.ID()
} else {
to = c.InputArgs[0]
}
changes, err := runtime.Diff(c, to)
if err != nil {
return errors.Wrapf(err, "could not get changes for %q", to)