mirror of
https://github.com/containers/podman
synced 2024-10-20 17:23:30 +00:00
129 lines
2.9 KiB
Go
129 lines
2.9 KiB
Go
package main
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import (
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"fmt"
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"github.com/containers/storage/pkg/archive"
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"github.com/pkg/errors"
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"github.com/projectatomic/libpod/cmd/kpod/formats"
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"github.com/urfave/cli"
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)
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type diffJSONOutput struct {
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Changed []string `json:"changed,omitempty"`
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Added []string `json:"added,omitempty"`
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Deleted []string `json:"deleted,omitempty"`
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}
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type diffOutputParams struct {
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Change archive.ChangeType
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Path string
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}
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type stdoutStruct struct {
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output []diffOutputParams
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}
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func (so stdoutStruct) Out() error {
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for _, d := range so.output {
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fmt.Printf("%s %s\n", d.Change, d.Path)
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}
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return nil
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}
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var (
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diffFlags = []cli.Flag{
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cli.BoolFlag{
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Name: "archive",
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Usage: "Save the diff as a tar archive",
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Hidden: true,
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},
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cli.StringFlag{
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Name: "format",
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Usage: "Change the output format.",
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},
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}
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diffDescription = fmt.Sprint(`Displays changes on a container or image's filesystem. The
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container or image will be compared to its parent layer`)
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diffCommand = cli.Command{
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Name: "diff",
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Usage: "Inspect changes on container's file systems",
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Description: diffDescription,
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Flags: diffFlags,
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Action: diffCmd,
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ArgsUsage: "ID-NAME",
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}
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)
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func formatJSON(output []diffOutputParams) (diffJSONOutput, error) {
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jsonStruct := diffJSONOutput{}
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for _, output := range output {
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switch output.Change {
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case archive.ChangeModify:
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jsonStruct.Changed = append(jsonStruct.Changed, output.Path)
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case archive.ChangeAdd:
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jsonStruct.Added = append(jsonStruct.Added, output.Path)
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case archive.ChangeDelete:
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jsonStruct.Deleted = append(jsonStruct.Deleted, output.Path)
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default:
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return jsonStruct, errors.Errorf("output kind %q not recognized", output.Change.String())
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}
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}
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return jsonStruct, nil
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}
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func diffCmd(c *cli.Context) error {
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if err := validateFlags(c, diffFlags); err != nil {
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return err
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}
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if len(c.Args()) != 1 {
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return errors.Errorf("container, image, or layer name must be specified: kpod diff [options [...]] ID-NAME")
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}
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runtime, err := getRuntime(c)
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if err != nil {
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return errors.Wrapf(err, "could not get runtime")
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}
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defer runtime.Shutdown(false)
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to := c.Args().Get(0)
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changes, err := runtime.GetDiff("", to)
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if err != nil {
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return errors.Wrapf(err, "could not get changes for %q", to)
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}
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diffOutput := []diffOutputParams{}
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outputFormat := c.String("format")
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for _, change := range changes {
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params := diffOutputParams{
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Change: change.Kind,
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Path: change.Path,
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}
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diffOutput = append(diffOutput, params)
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}
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var out formats.Writer
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if outputFormat != "" {
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switch outputFormat {
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case formats.JSONString:
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data, err := formatJSON(diffOutput)
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if err != nil {
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return err
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}
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out = formats.JSONStruct{Output: data}
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default:
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return errors.New("only valid format for diff is 'json'")
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}
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} else {
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out = stdoutStruct{output: diffOutput}
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}
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formats.Writer(out).Out()
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return nil
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}
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