forked from containers/buildah
/
inspect.go
116 lines (104 loc) · 2.7 KB
/
inspect.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
package main
import (
"encoding/json"
"fmt"
"os"
"text/template"
"github.com/pkg/errors"
"github.com/projectatomic/buildah"
"github.com/urfave/cli"
"golang.org/x/crypto/ssh/terminal"
)
const (
defaultFormat = `Container: {{.Container}}
ID: {{.ContainerID}}
`
inspectTypeContainer = "container"
inspectTypeImage = "image"
)
var (
inspectFlags = []cli.Flag{
cli.StringFlag{
Name: "format, f",
Usage: "use `format` as a Go template to format the output",
},
cli.StringFlag{
Name: "type, t",
Usage: "look at the item of the specified `type` (container or image) and name",
Value: inspectTypeContainer,
},
}
inspectDescription = "Inspects a build container's or built image's configuration."
inspectCommand = cli.Command{
Name: "inspect",
Usage: "Inspects the configuration of a container or image",
Description: inspectDescription,
Flags: inspectFlags,
Action: inspectCmd,
ArgsUsage: "CONTAINER-OR-IMAGE",
SkipArgReorder: true,
}
)
func inspectCmd(c *cli.Context) error {
var builder *buildah.Builder
args := c.Args()
if len(args) == 0 {
return errors.Errorf("container or image name must be specified")
}
if len(args) > 1 {
return errors.Errorf("too many arguments specified")
}
if err := validateFlags(c, inspectFlags); err != nil {
return err
}
systemContext, err := systemContextFromOptions(c)
if err != nil {
return errors.Wrapf(err, "error building system context")
}
format := defaultFormat
if c.String("format") != "" {
format = c.String("format")
}
t := template.Must(template.New("format").Parse(format))
name := args[0]
store, err := getStore(c)
if err != nil {
return err
}
switch c.String("type") {
case inspectTypeContainer:
builder, err = openBuilder(store, name)
if err != nil {
if c.IsSet("type") {
return errors.Wrapf(err, "error reading build container %q", name)
}
builder, err = openImage(systemContext, store, name)
if err != nil {
return errors.Wrapf(err, "error reading build object %q", name)
}
}
case inspectTypeImage:
builder, err = openImage(systemContext, store, name)
if err != nil {
return errors.Wrapf(err, "error reading image %q", name)
}
default:
return errors.Errorf("the only recognized types are %q and %q", inspectTypeContainer, inspectTypeImage)
}
out := buildah.GetBuildInfo(builder)
if c.IsSet("format") {
if err := t.Execute(os.Stdout, out); err != nil {
return err
}
if terminal.IsTerminal(int(os.Stdout.Fd())) {
fmt.Println()
}
return nil
}
enc := json.NewEncoder(os.Stdout)
enc.SetIndent("", " ")
if terminal.IsTerminal(int(os.Stdout.Fd())) {
enc.SetEscapeHTML(false)
}
return enc.Encode(out)
}