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
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
package main
import (
"fmt"
"github.com/containers/libpod/cmd/podman/formats"
"github.com/containers/libpod/cmd/podman/libpodruntime"
"github.com/containers/storage/pkg/archive"
"github.com/pkg/errors"
"github.com/urfave/cli"
)
type diffJSONOutput struct {
Changed []string `json:"changed,omitempty"`
Added []string `json:"added,omitempty"`
Deleted []string `json:"deleted,omitempty"`
}
type diffOutputParams struct {
Change archive.ChangeType
Path string
}
type stdoutStruct struct {
output []diffOutputParams
}
func (so stdoutStruct) Out() error {
for _, d := range so.output {
fmt.Printf("%s %s\n", d.Change, d.Path)
}
return nil
}
var (
diffFlags = []cli.Flag{
cli.BoolFlag{
Name: "archive",
Usage: "Save the diff as a tar archive",
Hidden: true,
},
cli.StringFlag{
Name: "format",
Usage: "Change the output format.",
},
}
diffDescription = fmt.Sprint(`Displays changes on a container or image's filesystem. The
container or image will be compared to its parent layer`)
diffCommand = cli.Command{
Name: "diff",
Usage: "Inspect changes on container's file systems",
Description: diffDescription,
Flags: sortFlags(diffFlags),
Action: diffCmd,
ArgsUsage: "ID-NAME",
OnUsageError: usageErrorHandler,
}
)
func formatJSON(output []diffOutputParams) (diffJSONOutput, error) {
jsonStruct := diffJSONOutput{}
for _, output := range output {
switch output.Change {
case archive.ChangeModify:
jsonStruct.Changed = append(jsonStruct.Changed, output.Path)
case archive.ChangeAdd:
jsonStruct.Added = append(jsonStruct.Added, output.Path)
case archive.ChangeDelete:
jsonStruct.Deleted = append(jsonStruct.Deleted, output.Path)
default:
return jsonStruct, errors.Errorf("output kind %q not recognized", output.Change.String())
}
}
return jsonStruct, nil
}
func diffCmd(c *cli.Context) error {
if err := validateFlags(c, diffFlags); err != nil {
return err
}
if len(c.Args()) != 1 {
return errors.Errorf("container, image, or layer name must be specified: podman diff [options [...]] ID-NAME")
}
runtime, err := libpodruntime.GetRuntime(c)
if err != nil {
return errors.Wrapf(err, "could not get runtime")
}
defer runtime.Shutdown(false)
to := c.Args().Get(0)
changes, err := runtime.GetDiff("", to)
if err != nil {
return errors.Wrapf(err, "could not get changes for %q", to)
}
diffOutput := []diffOutputParams{}
outputFormat := c.String("format")
for _, change := range changes {
params := diffOutputParams{
Change: change.Kind,
Path: change.Path,
}
diffOutput = append(diffOutput, params)
}
var out formats.Writer
if outputFormat != "" {
switch outputFormat {
case formats.JSONString:
data, err := formatJSON(diffOutput)
if err != nil {
return err
}
out = formats.JSONStruct{Output: data}
default:
return errors.New("only valid format for diff is 'json'")
}
} else {
out = stdoutStruct{output: diffOutput}
}
formats.Writer(out).Out()
return nil
}
|
