summaryrefslogtreecommitdiffstats
path: root/main.go
blob: 89d2f656ece3df136f8fce87de13caa030c613a4 (plain)
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
// TODO add Doc
//
package main

import (
	"fmt"
	"os"
	"os/exec"
	"os/signal"
	"path/filepath"
	"syscall"
	"time"

	"github.com/Sirupsen/logrus"
	"github.com/codegangsta/cli"
	"github.com/iotbzh/xds-server/lib/crosssdk"
	"github.com/iotbzh/xds-server/lib/folder"
	"github.com/iotbzh/xds-server/lib/model"
	"github.com/iotbzh/xds-server/lib/syncthing"
	"github.com/iotbzh/xds-server/lib/webserver"
	"github.com/iotbzh/xds-server/lib/xdsconfig"
)

const (
	appName        = "xds-server"
	appDescription = "X(cross) Development System Server is a web server that allows to remotely cross build applications."
	appCopyright   = "Apache-2.0"
	appUsage       = "X(cross) Development System Server"
)

var appAuthors = []cli.Author{
	cli.Author{Name: "Sebastien Douheret", Email: "sebastien@iot.bzh"},
}

// AppVersion is the version of this application
var AppVersion = "?.?.?"

// AppSubVersion is the git tag id added to version string
// Should be set by compilation -ldflags "-X main.AppSubVersion=xxx"
var AppSubVersion = "unknown-dev"

// Context holds the XDS server context
type Context struct {
	ProgName    string
	Cli         *cli.Context
	Config      *xdsconfig.Config
	Log         *logrus.Logger
	SThg        *st.SyncThing
	SThgCmd     *exec.Cmd
	SThgInotCmd *exec.Cmd
	MFolders    *model.Folders
	SDKs        *crosssdk.SDKs
	WWWServer   *webserver.Server
	Exit        chan os.Signal
}

// NewContext Create a new instance of XDS server
func NewContext(cliCtx *cli.Context) *Context {
	var err error

	// Set logger level and formatter
	log := cliCtx.App.Metadata["logger"].(*logrus.Logger)

	logLevel := cliCtx.GlobalString("log")
	if logLevel == "" {
		logLevel = "error" // FIXME get from Config DefaultLogLevel
	}
	if log.Level, err = logrus.ParseLevel(logLevel); err != nil {
		fmt.Printf("Invalid log level : \"%v\"\n", logLevel)
		os.Exit(1)
	}
	log.Formatter = &logrus.TextFormatter{}

	// Define default configuration
	ctx := Context{
		ProgName: cliCtx.App.Name,
		Cli:      cliCtx,
		Log:      log,
		Exit:     make(chan os.Signal, 1),
	}

	// register handler on SIGTERM / exit
	signal.Notify(ctx.Exit, os.Interrupt, syscall.SIGTERM)
	go handlerSigTerm(&ctx)

	return &ctx
}

// Handle exit and properly stop/close all stuff
func handlerSigTerm(ctx *Context) {
	<-ctx.Exit
	if ctx.SThg != nil {
		ctx.Log.Infof("Stoping Syncthing... (PID %d)", ctx.SThgCmd.Process.Pid)
		ctx.SThg.Stop()
		ctx.Log.Infof("Stoping Syncthing-inotify... (PID %d)", ctx.SThgInotCmd.Process.Pid)
		ctx.SThg.StopInotify()
	}
	if ctx.WWWServer != nil {
		ctx.Log.Infof("Stoping Web server...")
		ctx.WWWServer.Stop()
	}
	os.Exit(0)
}

// Helper function to log message on both stdout and logger
func logPrint(ctx *Context, format string, args ...interface{}) {
	fmt.Printf(format, args...)
	if ctx.Log.Out != os.Stdout {
		ctx.Log.Infof(format, args...)
	}
}

// XDS Server application main routine
func xdsApp(cliCtx *cli.Context) error {
	var err error

	// Create XDS server context
	ctx := NewContext(cliCtx)

	// Load config
	cfg, err := xdsconfig.Init(ctx.Cli, ctx.Log)
	if err != nil {
		return cli.NewExitError(err, -2)
	}
	ctx.Config = cfg

	// Logs redirected into a file when logfile option or logsDir config is set
	ctx.Config.LogVerboseOut = os.Stderr
	if ctx.Config.FileConf.LogsDir != "" {
		if ctx.Config.Options.LogFile != "stdout" {
			logFile := ctx.Config.Options.LogFile

			fdL, err := os.OpenFile(logFile, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0666)
			if err != nil {
				msgErr := fmt.Sprintf("Cannot create log file %s", logFile)
				return cli.NewExitError(msgErr, int(syscall.EPERM))
			}
			ctx.Log.Out = fdL

			logPrint(ctx, "Logging file: %s\n", logFile)
		}

		logFileHTTPReq := filepath.Join(ctx.Config.FileConf.LogsDir, "xds-server-verbose.log")
		fdLH, err := os.OpenFile(logFileHTTPReq, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0666)
		if err != nil {
			msgErr := fmt.Sprintf("Cannot create log file %s", logFileHTTPReq)
			return cli.NewExitError(msgErr, int(syscall.EPERM))
		}
		ctx.Config.LogVerboseOut = fdLH

		logPrint(ctx, "Logging file for HTTP requests: %s\n", logFileHTTPReq)
	}

	// Create syncthing instance when section "syncthing" is present in config.json
	if ctx.Config.FileConf.SThgConf != nil {
		ctx.SThg = st.NewSyncThing(ctx.Config, ctx.Log)
	}

	// Start local instance of Syncthing and Syncthing-notify
	if ctx.SThg != nil {
		ctx.Log.Infof("Starting Syncthing...")
		ctx.SThgCmd, err = ctx.SThg.Start()
		if err != nil {
			return cli.NewExitError(err, -4)
		}
		logPrint(ctx, "Syncthing started (PID %d)\n", ctx.SThgCmd.Process.Pid)

		ctx.Log.Infof("Starting Syncthing-inotify...")
		ctx.SThgInotCmd, err = ctx.SThg.StartInotify()
		if err != nil {
			return cli.NewExitError(err, -4)
		}
		logPrint(ctx, "Syncthing-inotify started (PID %d)\n", ctx.SThgInotCmd.Process.Pid)

		// Establish connection with local Syncthing (retry if connection fail)
		logPrint(ctx, "Establishing connection with Syncthing...\n")
		time.Sleep(2 * time.Second)
		maxRetry := 30
		retry := maxRetry
		err = nil
		for retry > 0 {
			if err = ctx.SThg.Connect(); err == nil {
				break
			}
			ctx.Log.Warningf("Establishing connection to Syncthing (retry %d/%d)", retry, maxRetry)
			time.Sleep(time.Second)
			retry--
		}
		if err != nil || retry == 0 {
			return cli.NewExitError(err, -4)
		}

		// FIXME: do we still need Builder notion ? if no cleanup
		if ctx.Config.Builder, err = xdsconfig.NewBuilderConfig(ctx.SThg.MyID); err != nil {
			return cli.NewExitError(err, -4)
		}
		ctx.Config.SupportedSharing[folder.TypeCloudSync] = true
	}

	// Init model folder
	ctx.MFolders = model.FoldersNew(ctx.Config, ctx.SThg)

	// Load initial folders config from disk
	if err := ctx.MFolders.LoadConfig(); err != nil {
		return cli.NewExitError(err, -5)
	}

	// Init cross SDKs
	ctx.SDKs, err = crosssdk.Init(ctx.Config, ctx.Log)
	if err != nil {
		return cli.NewExitError(err, -6)
	}

	// Create Web Server
	ctx.WWWServer = webserver.New(ctx.Config, ctx.MFolders, ctx.SDKs, ctx.Log)

	// Run Web Server until exit requested (blocking call)
	if err = ctx.WWWServer.Serve(); err != nil {
		ctx.Log.Println(err)
		return cli.NewExitError(err, -7)
	}

	return cli.NewExitError("Program exited ", -99)
}

// main
func main() {

	// Create a new instance of the logger
	log := logrus.New()

	// Create a new App instance
	app := cli.NewApp()
	app.Name = appName
	app.Description = appDescription
	app.Usage = appUsage
	app.Version = AppVersion + " (" + AppSubVersion + ")"
	app.Authors = appAuthors
	app.Copyright = appCopyright
	app.Metadata = make(map[string]interface{})
	app.Metadata["version"] = AppVersion
	app.Metadata["git-tag"] = AppSubVersion
	app.Metadata["logger"] = log

	app.Flags = []cli.Flag{
		cli.StringFlag{
			Name:   "config, c",
			Usage:  "JSON config file to use\n\t",
			EnvVar: "APP_CONFIG",
		},
		cli.StringFlag{
			Name:   "log, l",
			Value:  "error",
			Usage:  "logging level (supported levels: panic, fatal, error, warn, info, debug)\n\t",
			EnvVar: "LOG_LEVEL",
		},
		cli.StringFlag{
			Name:   "logfile",
			Value:  "stdout",
			Usage:  "filename where logs will be redirected (default stdout)\n\t",
			EnvVar: "LOG_FILENAME",
		},
		cli.BoolFlag{
			Name:   "no-folderconfig, nfc",
			Usage:  fmt.Sprintf("Do not read folder config file (%s)\n\t", xdsconfig.FoldersConfigFilename),
			EnvVar: "NO_FOLDERCONFIG",
		},
	}

	// only one action: Web Server
	app.Action = xdsApp

	app.Run(os.Args)
}