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package diff
import (
"encoding/json"
"fmt"
"os"
"github.com/containers/common/pkg/report"
"github.com/containers/podman/v3/cmd/podman/registry"
"github.com/containers/podman/v3/pkg/domain/entities"
"github.com/containers/storage/pkg/archive"
"github.com/pkg/errors"
"github.com/spf13/cobra"
)
func Diff(cmd *cobra.Command, args []string, options entities.DiffOptions) error {
results, err := registry.ContainerEngine().Diff(registry.GetContext(), args, options)
if err != nil {
return err
}
switch {
case report.IsJSON(options.Format):
return changesToJSON(results)
case options.Format == "":
return changesToTable(results)
default:
return errors.New("only supported value for '--format' is 'json'")
}
}
type ChangesReportJSON struct {
Changed []string `json:"changed,omitempty"`
Added []string `json:"added,omitempty"`
Deleted []string `json:"deleted,omitempty"`
}
func changesToJSON(diffs *entities.DiffReport) error {
body := ChangesReportJSON{}
for _, row := range diffs.Changes {
switch row.Kind {
case archive.ChangeAdd:
body.Added = append(body.Added, row.Path)
case archive.ChangeDelete:
body.Deleted = append(body.Deleted, row.Path)
case archive.ChangeModify:
body.Changed = append(body.Changed, row.Path)
default:
return errors.Errorf("output kind %q not recognized", row.Kind)
}
}
// Pull in configured json library
enc := json.NewEncoder(os.Stdout)
enc.SetIndent("", " ")
return enc.Encode(body)
}
func changesToTable(diffs *entities.DiffReport) error {
for _, row := range diffs.Changes {
fmt.Fprintln(os.Stdout, row.String())
}
return nil
}
// IDOrLatestArgs used to validate a nameOrId was provided or the "--latest" flag
func ValidateContainerDiffArgs(cmd *cobra.Command, args []string) error {
given, _ := cmd.Flags().GetBool("latest")
if len(args) > 0 && !given {
return cobra.RangeArgs(1, 2)(cmd, args)
}
if len(args) > 0 && given {
return errors.New("--latest and containers cannot be used together")
}
if len(args) == 0 && !given {
return errors.Errorf("%q requires a name, id, or the \"--latest\" flag", cmd.CommandPath())
}
return nil
}
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