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package client
import (
"fmt"
"golang.org/x/net/context"
Cli "github.com/docker/docker/cli"
"github.com/docker/docker/pkg/archive"
flag "github.com/docker/docker/pkg/mflag"
)
// CmdDiff shows changes on a container's filesystem.
//
// Each changed file is printed on a separate line, prefixed with a single
// character that indicates the status of the file: C (modified), A (added),
// or D (deleted).
//
// Usage: docker diff CONTAINER
func (cli *DockerCli) CmdDiff(args ...string) error {
cmd := Cli.Subcmd("diff", []string{"CONTAINER"}, Cli.DockerCommands["diff"].Description, true)
cmd.Require(flag.Exact, 1)
cmd.ParseFlags(args, true)
if cmd.Arg(0) == "" {
return fmt.Errorf("Container name cannot be empty")
}
changes, err := cli.client.ContainerDiff(context.Background(), cmd.Arg(0))
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(cli.out, "%s %s\n", kind, change.Path)
}
return nil
}
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