github.com/squaremo/docker@v1.3.2-0.20150516120342-42cfc9554972/api/client/inspect.go (about)

     1  package client
     2  
     3  import (
     4  	"bytes"
     5  	"encoding/json"
     6  	"fmt"
     7  	"io"
     8  	"strings"
     9  	"text/template"
    10  
    11  	"github.com/docker/docker/api/types"
    12  	flag "github.com/docker/docker/pkg/mflag"
    13  )
    14  
    15  // CmdInspect displays low-level information on one or more containers or images.
    16  //
    17  // Usage: docker inspect [OPTIONS] CONTAINER|IMAGE [CONTAINER|IMAGE...]
    18  func (cli *DockerCli) CmdInspect(args ...string) error {
    19  	cmd := cli.Subcmd("inspect", "CONTAINER|IMAGE [CONTAINER|IMAGE...]", "Return low-level information on a container or image", true)
    20  	tmplStr := cmd.String([]string{"f", "#format", "-format"}, "", "Format the output using the given go template")
    21  	cmd.Require(flag.Min, 1)
    22  
    23  	cmd.ParseFlags(args, true)
    24  
    25  	var tmpl *template.Template
    26  	if *tmplStr != "" {
    27  		var err error
    28  		if tmpl, err = template.New("").Funcs(funcMap).Parse(*tmplStr); err != nil {
    29  			return StatusError{StatusCode: 64,
    30  				Status: "Template parsing error: " + err.Error()}
    31  		}
    32  	}
    33  
    34  	indented := new(bytes.Buffer)
    35  	indented.WriteString("[\n")
    36  	status := 0
    37  	isImage := false
    38  
    39  	for _, name := range cmd.Args() {
    40  		obj, _, err := readBody(cli.call("GET", "/containers/"+name+"/json", nil, nil))
    41  		if err != nil {
    42  			obj, _, err = readBody(cli.call("GET", "/images/"+name+"/json", nil, nil))
    43  			isImage = true
    44  			if err != nil {
    45  				if strings.Contains(err.Error(), "No such") {
    46  					fmt.Fprintf(cli.err, "Error: No such image or container: %s\n", name)
    47  				} else {
    48  					fmt.Fprintf(cli.err, "%s", err)
    49  				}
    50  				status = 1
    51  				continue
    52  			}
    53  		}
    54  
    55  		if tmpl == nil {
    56  			if err = json.Indent(indented, obj, "", "    "); err != nil {
    57  				fmt.Fprintf(cli.err, "%s\n", err)
    58  				status = 1
    59  				continue
    60  			}
    61  		} else {
    62  			rdr := bytes.NewReader(obj)
    63  			dec := json.NewDecoder(rdr)
    64  
    65  			if isImage {
    66  				inspPtr := types.ImageInspect{}
    67  				if err := dec.Decode(&inspPtr); err != nil {
    68  					fmt.Fprintf(cli.err, "%s\n", err)
    69  					status = 1
    70  					continue
    71  				}
    72  				if err := tmpl.Execute(cli.out, inspPtr); err != nil {
    73  					rdr.Seek(0, 0)
    74  					var raw interface{}
    75  					if err := dec.Decode(&raw); err != nil {
    76  						return err
    77  					}
    78  					if err = tmpl.Execute(cli.out, raw); err != nil {
    79  						return err
    80  					}
    81  				}
    82  			} else {
    83  				inspPtr := types.ContainerJSON{}
    84  				if err := dec.Decode(&inspPtr); err != nil {
    85  					fmt.Fprintf(cli.err, "%s\n", err)
    86  					status = 1
    87  					continue
    88  				}
    89  				if err := tmpl.Execute(cli.out, inspPtr); err != nil {
    90  					rdr.Seek(0, 0)
    91  					var raw interface{}
    92  					if err := dec.Decode(&raw); err != nil {
    93  						return err
    94  					}
    95  					if err = tmpl.Execute(cli.out, raw); err != nil {
    96  						return err
    97  					}
    98  				}
    99  			}
   100  			cli.out.Write([]byte{'\n'})
   101  		}
   102  		indented.WriteString(",")
   103  	}
   104  
   105  	if indented.Len() > 1 {
   106  		// Remove trailing ','
   107  		indented.Truncate(indented.Len() - 1)
   108  	}
   109  	indented.WriteString("]\n")
   110  
   111  	if tmpl == nil {
   112  		if _, err := io.Copy(cli.out, indented); err != nil {
   113  			return err
   114  		}
   115  	}
   116  
   117  	if status != 0 {
   118  		return StatusError{StatusCode: status}
   119  	}
   120  	return nil
   121  }