-
Notifications
You must be signed in to change notification settings - Fork 155
/
remote.go
303 lines (278 loc) · 8.19 KB
/
remote.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
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package buildlet
import (
"bufio"
"bytes"
"encoding/json"
"errors"
"flag"
"fmt"
"io/ioutil"
"log"
"net/http"
"net/url"
"os"
"path/filepath"
"runtime"
"strings"
"sync"
"time"
"golang.org/x/build"
"golang.org/x/build/buildenv"
"golang.org/x/build/types"
)
type UserPass struct {
Username string // "user-$USER"
Password string // buildlet key
}
// A CoordinatorClient makes calls to the build coordinator.
type CoordinatorClient struct {
// Auth specifies how to authenticate to the coordinator.
Auth UserPass
// Instance optionally specifies the build coordinator to connect
// to. If zero, the production coordinator is used.
Instance build.CoordinatorInstance
mu sync.Mutex
hc *http.Client
}
func (cc *CoordinatorClient) instance() build.CoordinatorInstance {
if cc.Instance == "" {
return build.ProdCoordinator
}
return cc.Instance
}
func (cc *CoordinatorClient) client() (*http.Client, error) {
cc.mu.Lock()
defer cc.mu.Unlock()
if cc.hc != nil {
return cc.hc, nil
}
cc.hc = &http.Client{
Transport: &http.Transport{
Dial: defaultDialer(),
DialTLS: cc.instance().TLSDialer(),
},
}
return cc.hc, nil
}
// CreateBuildlet creates a new buildlet of the given builder type on
// cc.
//
// This takes a builderType (instead of a hostType), but the
// returned buildlet can be used as any builder that has the same
// underlying buildlet type. For instance, a linux-amd64 buildlet can
// act as either linux-amd64 or linux-386-387.
//
// It may expire at any time.
// To release it, call Client.Close.
func (cc *CoordinatorClient) CreateBuildlet(builderType string) (*Client, error) {
return cc.CreateBuildletWithStatus(builderType, nil)
}
const (
// GomoteCreateStreamVersion is the gomote protocol version at which JSON streamed responses started.
GomoteCreateStreamVersion = "20191119"
// GomoteCreateMinVersion is the oldest "gomote create" protocol version that's still supported.
GomoteCreateMinVersion = "20160922"
)
// CreateBuildletWithStatus is like CreateBuildlet but accepts an optional status callback.
func (cc *CoordinatorClient) CreateBuildletWithStatus(builderType string, status func(types.BuildletWaitStatus)) (*Client, error) {
hc, err := cc.client()
if err != nil {
return nil, err
}
ipPort, _ := cc.instance().TLSHostPort() // must succeed if client did
form := url.Values{
"version": {GomoteCreateStreamVersion}, // checked by cmd/coordinator/remote.go
"builderType": {builderType},
}
req, _ := http.NewRequest("POST",
"https://"+ipPort+"/buildlet/create",
strings.NewReader(form.Encode()))
req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
req.SetBasicAuth(cc.Auth.Username, cc.Auth.Password)
// TODO: accept a context for deadline/cancelation
res, err := hc.Do(req)
if err != nil {
return nil, err
}
defer res.Body.Close()
if res.StatusCode != 200 {
slurp, _ := ioutil.ReadAll(res.Body)
return nil, fmt.Errorf("%s: %s", res.Status, slurp)
}
// TODO: delete this once the server's been deployed with it.
// This code only exists for compatibility for a day or two at most.
if res.Header.Get("X-Supported-Version") < GomoteCreateStreamVersion {
var rb RemoteBuildlet
if err := json.NewDecoder(res.Body).Decode(&rb); err != nil {
return nil, err
}
return cc.NamedBuildlet(rb.Name)
}
type msg struct {
Error string `json:"error"`
Buildlet *RemoteBuildlet `json:"buildlet"`
Status *types.BuildletWaitStatus `json:"status"`
}
bs := bufio.NewScanner(res.Body)
for bs.Scan() {
line := bs.Bytes()
var m msg
if err := json.Unmarshal(line, &m); err != nil {
return nil, err
}
if m.Error != "" {
return nil, errors.New(m.Error)
}
if m.Buildlet != nil {
if m.Buildlet.Name == "" {
return nil, fmt.Errorf("buildlet: coordinator's /buildlet/create returned an unnamed buildlet")
}
return cc.NamedBuildlet(m.Buildlet.Name)
}
if m.Status != nil {
if status != nil {
status(*m.Status)
}
continue
}
log.Printf("buildlet: unknown message type from coordinator's /buildlet/create endpoint: %q", line)
continue
}
err = bs.Err()
if err == nil {
err = errors.New("buildlet: coordinator's /buildlet/create ended its response stream without a terminal message")
}
return nil, err
}
type RemoteBuildlet struct {
HostType string // "host-linux-jessie"
BuilderType string // "linux-386-387"
Name string // "buildlet-adg-openbsd-386-2"
Created time.Time
Expires time.Time
}
func (cc *CoordinatorClient) RemoteBuildlets() ([]RemoteBuildlet, error) {
hc, err := cc.client()
if err != nil {
return nil, err
}
ipPort, _ := cc.instance().TLSHostPort() // must succeed if client did
req, _ := http.NewRequest("GET", "https://"+ipPort+"/buildlet/list", nil)
req.SetBasicAuth(cc.Auth.Username, cc.Auth.Password)
res, err := hc.Do(req)
if err != nil {
return nil, err
}
defer res.Body.Close()
if res.StatusCode != 200 {
slurp, _ := ioutil.ReadAll(res.Body)
return nil, fmt.Errorf("%s: %s", res.Status, slurp)
}
var ret []RemoteBuildlet
if err := json.NewDecoder(res.Body).Decode(&ret); err != nil {
return nil, err
}
return ret, nil
}
// NamedBuildlet returns a buildlet client for the named remote buildlet.
// Names are not validated. Use Client.Status to check whether the client works.
func (cc *CoordinatorClient) NamedBuildlet(name string) (*Client, error) {
hc, err := cc.client()
if err != nil {
return nil, err
}
ipPort, _ := cc.instance().TLSHostPort() // must succeed if client did
c := &Client{
baseURL: "https://" + ipPort,
remoteBuildlet: name,
httpClient: hc,
authUser: cc.Auth.Username,
password: cc.Auth.Password,
}
c.setCommon()
return c, nil
}
var (
flagsRegistered bool
gomoteUserFlag string
)
// RegisterFlags registers "user" and "staging" flags that control the
// behavior of NewCoordinatorClientFromFlags. These are used by remote
// client commands like gomote.
func RegisterFlags() {
if !flagsRegistered {
buildenv.RegisterFlags()
flag.StringVar(&gomoteUserFlag, "user", username(), "gomote server username")
flagsRegistered = true
}
}
// username finds the user's username in the environment.
func username() string {
if runtime.GOOS == "windows" {
return os.Getenv("USERNAME")
}
return os.Getenv("USER")
}
// configDir finds the OS-dependent config dir.
func configDir() string {
if runtime.GOOS == "windows" {
return filepath.Join(os.Getenv("APPDATA"), "Gomote")
}
if xdg := os.Getenv("XDG_CONFIG_HOME"); xdg != "" {
return filepath.Join(xdg, "gomote")
}
return filepath.Join(os.Getenv("HOME"), ".config", "gomote")
}
// userToken reads the gomote token from the user's home directory.
func userToken() (string, error) {
if gomoteUserFlag == "" {
panic("userToken called with user flag empty")
}
keyDir := configDir()
userPath := filepath.Join(keyDir, "user-"+gomoteUserFlag+".user")
b, err := ioutil.ReadFile(userPath)
if err == nil {
gomoteUserFlag = string(bytes.TrimSpace(b))
}
baseFile := "user-" + gomoteUserFlag + ".token"
if buildenv.FromFlags() == buildenv.Staging {
baseFile = "staging-" + baseFile
}
tokenFile := filepath.Join(keyDir, baseFile)
slurp, err := ioutil.ReadFile(tokenFile)
if os.IsNotExist(err) {
return "", fmt.Errorf("Missing file %s for user %q. Change --user or obtain a token and place it there.",
tokenFile, gomoteUserFlag)
}
return strings.TrimSpace(string(slurp)), err
}
// NewCoordinatorClientFromFlags constructs a CoordinatorClient for the current user.
func NewCoordinatorClientFromFlags() (*CoordinatorClient, error) {
if !flagsRegistered {
return nil, errors.New("RegisterFlags not called")
}
inst := build.ProdCoordinator
env := buildenv.FromFlags()
if env == buildenv.Staging {
inst = build.StagingCoordinator
} else if env == buildenv.Development {
inst = "localhost:8119"
}
if gomoteUserFlag == "" {
return nil, errors.New("user flag must be specified")
}
tok, err := userToken()
if err != nil {
return nil, err
}
return &CoordinatorClient{
Auth: UserPass{
Username: "user-" + gomoteUserFlag,
Password: tok,
},
Instance: inst,
}, nil
}