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package images
import (
"github.com/containers/common/pkg/report"
"github.com/containers/podman/v3/cmd/podman/common"
"github.com/containers/podman/v3/cmd/podman/registry"
"github.com/containers/podman/v3/pkg/domain/entities"
"github.com/pkg/errors"
"github.com/spf13/cobra"
"github.com/spf13/pflag"
)
var (
// podman container _inspect_
diffCmd = &cobra.Command{
Use: "diff [options] IMAGE",
Args: cobra.ExactArgs(1),
Short: "Inspect changes to the image's file systems",
Long: `Displays changes to the image's filesystem. The image will be compared to its parent layer.`,
RunE: diff,
ValidArgsFunction: common.AutocompleteImages,
Example: `podman image diff myImage
podman image diff --format json redis:alpine`,
}
diffOpts *entities.DiffOptions
)
func init() {
registry.Commands = append(registry.Commands, registry.CliCommand{
Command: diffCmd,
Parent: imageCmd,
})
diffFlags(diffCmd.Flags())
}
func diffFlags(flags *pflag.FlagSet) {
diffOpts = &entities.DiffOptions{}
flags.BoolVar(&diffOpts.Archive, "archive", true, "Save the diff as a tar archive")
_ = flags.MarkDeprecated("archive", "Provided for backwards compatibility, has no impact on output.")
formatFlagName := "format"
flags.StringVar(&diffOpts.Format, formatFlagName, "", "Change the output format")
_ = diffCmd.RegisterFlagCompletionFunc(formatFlagName, common.AutocompleteFormat(nil))
}
func diff(cmd *cobra.Command, args []string) error {
if diffOpts.Latest {
return errors.New("image diff does not support --latest")
}
results, err := registry.ImageEngine().Diff(registry.GetContext(), args[0], *diffOpts)
if err != nil {
return err
}
switch {
case report.IsJSON(diffOpts.Format):
return common.ChangesToJSON(results)
case diffOpts.Format == "":
return common.ChangesToTable(results)
default:
return errors.New("only supported value for '--format' is 'json'")
}
}
func Diff(cmd *cobra.Command, args []string, options entities.DiffOptions) error {
diffOpts = &options
return diff(cmd, args)
}
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