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diff.go

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package container

import (

"context"

"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"

)

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: NewDiffFormat("{{.Type}} {{.Path}}"),

}

return DiffFormatWrite(diffCtx, changes)

}