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package main
import (
"fmt"
"github.com/containers/podman/v3/cmd/podman/common"
"github.com/containers/podman/v3/cmd/podman/containers"
"github.com/containers/podman/v3/cmd/podman/images"
"github.com/containers/podman/v3/cmd/podman/registry"
"github.com/containers/podman/v3/cmd/podman/validate"
"github.com/containers/podman/v3/pkg/domain/entities"
"github.com/spf13/cobra"
)
// Inspect is one of the outlier commands in that it operates on images/containers/...
var (
// Command: podman _diff_ Object_ID
diffDescription = `Displays changes on a container or image's filesystem. The container or image will be compared to its parent layer.`
diffCmd = &cobra.Command{
Use: "diff [options] {CONTAINER|IMAGE}",
Args: validate.IDOrLatestArgs,
Short: "Display the changes to the object's file system",
Long: diffDescription,
RunE: diff,
ValidArgsFunction: common.AutocompleteContainersAndImages,
Example: `podman diff imageID
podman diff ctrID
podman diff --format json redis:alpine`,
}
diffOpts = entities.DiffOptions{}
)
func init() {
registry.Commands = append(registry.Commands, registry.CliCommand{
Mode: []entities.EngineMode{entities.ABIMode, entities.TunnelMode},
Command: diffCmd,
})
flags := diffCmd.Flags()
flags.BoolVar(&diffOpts.Archive, "archive", true, "Save the diff as a tar archive")
_ = flags.MarkHidden("archive")
formatFlagName := "format"
flags.StringVar(&diffOpts.Format, formatFlagName, "", "Change the output format")
_ = diffCmd.RegisterFlagCompletionFunc(formatFlagName, common.AutocompleteJSONFormat)
validate.AddLatestFlag(diffCmd, &diffOpts.Latest)
}
func diff(cmd *cobra.Command, args []string) error {
// Latest implies looking for a container
if diffOpts.Latest {
return containers.Diff(cmd, args, diffOpts)
}
options := entities.ContainerExistsOptions{
External: true,
}
if found, err := registry.ContainerEngine().ContainerExists(registry.GetContext(), args[0], options); err != nil {
return err
} else if found.Value {
return containers.Diff(cmd, args, diffOpts)
}
if found, err := registry.ImageEngine().Exists(registry.GetContext(), args[0]); err != nil {
return err
} else if found.Value {
return images.Diff(cmd, args, diffOpts)
}
return fmt.Errorf("%s not found on system", args[0])
}
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