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package container
import (
"fmt"
"golang.org/x/net/context"
"github.com/docker/docker/api/client"
"github.com/docker/docker/cli"
"github.com/docker/docker/pkg/archive"
"github.com/spf13/cobra"
)
type diffOptions struct {
container string
}
// NewDiffCommand creats a new cobra.Command for `docker diff`
func NewDiffCommand(dockerCli *client.DockerCli) *cobra.Command {
var opts diffOptions
cmd := &cobra.Command{
Use: "diff CONTAINER",
Short: "Inspect changes on a container's filesystem",
Args: cli.ExactArgs(1),
RunE: func(cmd *cobra.Command, args []string) error {
opts.container = args[0]
return runDiff(dockerCli, &opts)
},
}
cmd.SetFlagErrorFunc(flagErrorFunc)
return cmd
}
func runDiff(dockerCli *client.DockerCli, opts *diffOptions) error {
if opts.container == "" {
return fmt.Errorf("Container name cannot be empty")
}
ctx := context.Background()
changes, err := dockerCli.Client().ContainerDiff(ctx, opts.container)
if err != nil {
return err
}
for _, change := range changes {
var kind string
switch change.Kind {
case archive.ChangeModify:
kind = "C"
case archive.ChangeAdd:
kind = "A"
case archive.ChangeDelete:
kind = "D"
}
fmt.Fprintf(dockerCli.Out(), "%s %s\n", kind, change.Path)
}
return nil
}
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