forked from openshift/origin
-
Notifications
You must be signed in to change notification settings - Fork 0
/
appjson.go
257 lines (221 loc) · 7.29 KB
/
appjson.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
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
package importer
import (
"fmt"
"io"
"io/ioutil"
"net/http"
"net/url"
"os"
"path"
"path/filepath"
"strings"
"github.com/spf13/cobra"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/schema"
kapi "k8s.io/kubernetes/pkg/api"
"k8s.io/kubernetes/pkg/kubectl"
"k8s.io/kubernetes/pkg/kubectl/cmd/templates"
kcmdutil "k8s.io/kubernetes/pkg/kubectl/cmd/util"
"github.com/openshift/origin/pkg/client"
cmdutil "github.com/openshift/origin/pkg/cmd/util"
"github.com/openshift/origin/pkg/cmd/util/clientcmd"
configcmd "github.com/openshift/origin/pkg/config/cmd"
"github.com/openshift/origin/pkg/generate/app"
appcmd "github.com/openshift/origin/pkg/generate/app/cmd"
"github.com/openshift/origin/pkg/generate/appjson"
)
const AppJSONV1GeneratorName = "app-json/v1"
var (
appJSONLong = templates.LongDesc(`
Import app.json files as OpenShift objects
app.json defines the pattern of a simple, stateless web application that can be horizontally scaled.
This command will transform a provided app.json object into its OpenShift equivalent.
During transformation fields in the app.json syntax that are not relevant when running on top of
a containerized platform will be ignored and a warning printed.
The command will create objects unless you pass the -o yaml or --as-template flags to generate a
configuration file for later use.
Experimental: This command is under active development and may change without notice.`)
appJSONExample = templates.Examples(`
# Import a directory containing an app.json file
$ %[1]s app.json -f .
# Turn an app.json file into a template
$ %[1]s app.json -f ./app.json -o yaml --as-template`)
)
type AppJSONOptions struct {
Action configcmd.BulkAction
In io.Reader
Filenames []string
BaseImage string
Generator string
AsTemplate string
PrintObject func(runtime.Object) error
OutputVersions []schema.GroupVersion
Namespace string
Client client.TemplateConfigsNamespacer
}
// NewCmdAppJSON imports an app.json file (schema described here: https://devcenter.heroku.com/articles/app-json-schema)
// as a template.
func NewCmdAppJSON(fullName string, f *clientcmd.Factory, in io.Reader, out, errout io.Writer) *cobra.Command {
options := &AppJSONOptions{
Action: configcmd.BulkAction{
Out: out,
ErrOut: errout,
},
In: in,
Generator: AppJSONV1GeneratorName,
}
cmd := &cobra.Command{
Use: "app.json -f APPJSON",
Short: "Import an app.json definition into OpenShift (experimental)",
Long: appJSONLong,
Example: fmt.Sprintf(appJSONExample, fullName),
Run: func(cmd *cobra.Command, args []string) {
kcmdutil.CheckErr(options.Complete(f, cmd, args))
kcmdutil.CheckErr(options.Validate())
if err := options.Run(); err != nil {
// TODO: move me to kcmdutil
if err == cmdutil.ErrExit {
os.Exit(1)
}
kcmdutil.CheckErr(err)
}
},
}
usage := "Filename, directory, or URL to app.json file to use"
kubectl.AddJsonFilenameFlag(cmd, &options.Filenames, usage)
cmd.MarkFlagRequired("filename")
cmd.Flags().StringVar(&options.BaseImage, "image", options.BaseImage, "An optional image to use as your base Docker build (must have ONBUILD directives)")
cmd.Flags().String("generator", options.Generator, "The name of the generator strategy to use - specify this value to for backwards compatibility.")
cmd.Flags().StringVar(&options.AsTemplate, "as-template", "", "If set, generate a template with the provided name")
options.Action.BindForOutput(cmd.Flags())
cmd.Flags().String("output-version", "", "The preferred API versions of the output objects")
return cmd
}
func (o *AppJSONOptions) Complete(f *clientcmd.Factory, cmd *cobra.Command, args []string) error {
version, _ := cmd.Flags().GetString("output-version")
for _, v := range strings.Split(version, ",") {
gv, err := schema.ParseGroupVersion(v)
if err != nil {
return fmt.Errorf("provided output-version %q is not valid: %v", v, err)
}
o.OutputVersions = append(o.OutputVersions, gv)
}
o.OutputVersions = append(o.OutputVersions, kapi.Registry.EnabledVersions()...)
o.Action.Bulk.Mapper = clientcmd.ResourceMapper(f)
o.Action.Bulk.Op = configcmd.Create
mapper, _ := f.Object()
o.PrintObject = cmdutil.VersionedPrintObject(f.PrintObject, cmd, mapper, o.Action.Out)
o.Generator, _ = cmd.Flags().GetString("generator")
ns, _, err := f.DefaultNamespace()
if err != nil {
return err
}
o.Namespace = ns
o.Client, _, err = f.Clients()
return err
}
func (o *AppJSONOptions) Validate() error {
if len(o.Filenames) != 1 {
return fmt.Errorf("you must provide the path to an app.json file or directory containing app.json")
}
switch o.Generator {
case AppJSONV1GeneratorName:
default:
return fmt.Errorf("the generator %q is not supported, use: %s", o.Generator, AppJSONV1GeneratorName)
}
return nil
}
func (o *AppJSONOptions) Run() error {
localPath, contents, err := contentsForPathOrURL(o.Filenames[0], o.In, "app.json")
if err != nil {
return err
}
g := &appjson.Generator{
LocalPath: localPath,
BaseImage: o.BaseImage,
}
switch {
case len(o.AsTemplate) > 0:
g.Name = o.AsTemplate
case len(localPath) > 0:
g.Name = filepath.Base(localPath)
default:
g.Name = path.Base(path.Dir(o.Filenames[0]))
}
if len(g.Name) == 0 {
g.Name = "app"
}
template, err := g.Generate(contents)
if err != nil {
return err
}
template.ObjectLabels = map[string]string{"app.json": template.Name}
// all the types generated into the template should be known
if errs := app.AsVersionedObjects(template.Objects, kapi.Scheme, kapi.Scheme, o.OutputVersions...); len(errs) > 0 {
for _, err := range errs {
fmt.Fprintf(o.Action.ErrOut, "error: %v\n", err)
}
}
if o.Action.ShouldPrint() || (o.Action.Output == "name" && len(o.AsTemplate) > 0) {
var out runtime.Object
if len(o.AsTemplate) > 0 {
template.Name = o.AsTemplate
out = template
} else {
out = &kapi.List{Items: template.Objects}
}
return o.PrintObject(out)
}
result, err := appcmd.TransformTemplate(template, o.Client, o.Namespace, nil, false)
if err != nil {
return err
}
if o.Action.Verbose() {
appcmd.DescribeGeneratedTemplate(o.Action.Out, "", result, o.Namespace)
}
if errs := o.Action.WithMessage("Importing app.json", "creating").Run(&kapi.List{Items: result.Objects}, o.Namespace); len(errs) > 0 {
return cmdutil.ErrExit
}
return nil
}
func contentsForPathOrURL(s string, in io.Reader, subpaths ...string) (string, []byte, error) {
switch {
case s == "-":
contents, err := ioutil.ReadAll(in)
return "", contents, err
case strings.Index(s, "http://") == 0 || strings.Index(s, "https://") == 0:
_, err := url.Parse(s)
if err != nil {
return "", nil, fmt.Errorf("the URL passed to filename %q is not valid: %v", s, err)
}
res, err := http.Get(s)
if err != nil {
return "", nil, err
}
defer res.Body.Close()
contents, err := ioutil.ReadAll(res.Body)
return "", contents, err
default:
stat, err := os.Stat(s)
if err != nil {
return s, nil, err
}
if !stat.IsDir() {
contents, err := ioutil.ReadFile(s)
return s, contents, err
}
for _, sub := range subpaths {
path := filepath.Join(s, sub)
stat, err := os.Stat(path)
if err != nil {
continue
}
if stat.IsDir() {
continue
}
contents, err := ioutil.ReadFile(s)
return path, contents, err
}
return s, nil, os.ErrNotExist
}
}