github.com/scorpionis/docker@v1.6.0-rc7/graph/history.go (about)

     1  package graph
     2  
     3  import (
     4  	"strings"
     5  
     6  	"github.com/docker/docker/engine"
     7  	"github.com/docker/docker/image"
     8  	"github.com/docker/docker/utils"
     9  )
    10  
    11  func (s *TagStore) CmdHistory(job *engine.Job) engine.Status {
    12  	if n := len(job.Args); n != 1 {
    13  		return job.Errorf("Usage: %s IMAGE", job.Name)
    14  	}
    15  	name := job.Args[0]
    16  	foundImage, err := s.LookupImage(name)
    17  	if err != nil {
    18  		return job.Error(err)
    19  	}
    20  
    21  	lookupMap := make(map[string][]string)
    22  	for name, repository := range s.Repositories {
    23  		for tag, id := range repository {
    24  			// If the ID already has a reverse lookup, do not update it unless for "latest"
    25  			if _, exists := lookupMap[id]; !exists {
    26  				lookupMap[id] = []string{}
    27  			}
    28  			lookupMap[id] = append(lookupMap[id], utils.ImageReference(name, tag))
    29  		}
    30  	}
    31  
    32  	outs := engine.NewTable("Created", 0)
    33  	err = foundImage.WalkHistory(func(img *image.Image) error {
    34  		out := &engine.Env{}
    35  		out.SetJson("Id", img.ID)
    36  		out.SetInt64("Created", img.Created.Unix())
    37  		out.Set("CreatedBy", strings.Join(img.ContainerConfig.Cmd, " "))
    38  		out.SetList("Tags", lookupMap[img.ID])
    39  		out.SetInt64("Size", img.Size)
    40  		outs.Add(out)
    41  		return nil
    42  	})
    43  	if _, err := outs.WriteListTo(job.Stdout); err != nil {
    44  		return job.Error(err)
    45  	}
    46  	return engine.StatusOK
    47  }