DockerCLI/cli/command/container/diff.go

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package container
import (
"github.com/docker/cli/cli"
"github.com/docker/cli/cli/command"
"github.com/docker/cli/cli/command/formatter"
"github.com/pkg/errors"
"github.com/spf13/cobra"
"golang.org/x/net/context"
)
type diffOptions struct {
container string
}
// NewDiffCommand creates a new cobra.Command for `docker diff`
func NewDiffCommand(dockerCli command.Cli) *cobra.Command {
var opts diffOptions
return &cobra.Command{
Use: "diff CONTAINER",
Short: "Inspect changes to files or directories 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)
},
}
}
func runDiff(dockerCli command.Cli, opts *diffOptions) error {
if opts.container == "" {
return errors.New("Container name cannot be empty")
}
ctx := context.Background()
changes, err := dockerCli.Client().ContainerDiff(ctx, opts.container)
if err != nil {
return err
}
diffCtx := formatter.Context{
Output: dockerCli.Out(),
Format: formatter.NewDiffFormat("{{.Type}} {{.Path}}"),
}
return formatter.DiffWrite(diffCtx, changes)
}