github.com/rentongzhang/docker@v1.8.2-rc1/api/client/diff.go (about)

     1  package client
     2  
     3  import (
     4  	"encoding/json"
     5  	"fmt"
     6  
     7  	"github.com/docker/docker/api/types"
     8  	Cli "github.com/docker/docker/cli"
     9  	"github.com/docker/docker/pkg/archive"
    10  	flag "github.com/docker/docker/pkg/mflag"
    11  )
    12  
    13  // CmdDiff shows changes on a container's filesystem.
    14  //
    15  // Each changed file is printed on a separate line, prefixed with a single
    16  // character that indicates the status of the file: C (modified), A (added),
    17  // or D (deleted).
    18  //
    19  // Usage: docker diff CONTAINER
    20  func (cli *DockerCli) CmdDiff(args ...string) error {
    21  	cmd := Cli.Subcmd("diff", []string{"CONTAINER"}, "Inspect changes on a container's filesystem", true)
    22  	cmd.Require(flag.Exact, 1)
    23  
    24  	cmd.ParseFlags(args, true)
    25  
    26  	if cmd.Arg(0) == "" {
    27  		return fmt.Errorf("Container name cannot be empty")
    28  	}
    29  
    30  	serverResp, err := cli.call("GET", "/containers/"+cmd.Arg(0)+"/changes", nil, nil)
    31  	if err != nil {
    32  		return err
    33  	}
    34  
    35  	defer serverResp.body.Close()
    36  
    37  	changes := []types.ContainerChange{}
    38  	if err := json.NewDecoder(serverResp.body).Decode(&changes); err != nil {
    39  		return err
    40  	}
    41  
    42  	for _, change := range changes {
    43  		var kind string
    44  		switch change.Kind {
    45  		case archive.ChangeModify:
    46  			kind = "C"
    47  		case archive.ChangeAdd:
    48  			kind = "A"
    49  		case archive.ChangeDelete:
    50  			kind = "D"
    51  		}
    52  		fmt.Fprintf(cli.out, "%s %s\n", kind, change.Path)
    53  	}
    54  
    55  	return nil
    56  }