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main.go
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main.go
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package main
import (
"flag"
"fmt"
"log"
"os"
"os/signal"
"strings"
"time"
"github.com/hashicorp/errwrap"
"github.com/timeglass/glass/daemon/watching"
"github.com/timeglass/glass/model"
)
var Version = "0.0.0"
var Build = "gobuild"
var mbu = flag.Duration("mbu", time.Minute, "The minimal billable unit")
var bind = flag.String("bind", ":0", "Address to bind the Daemon to")
var force = flag.Bool("force", false, "Force start the Daemon")
func main() {
flag.Parse()
//by default timeout is four times the mbu
//@todo make configurable
timer := NewTimer(*mbu, 4*(*mbu))
svr, err := NewServer(*bind, timer)
if err != nil {
log.Fatal(err)
}
//check version without delaying start times
go svr.CheckVersion()
dir, err := os.Getwd()
if err != nil {
log.Fatal(errwrap.Wrapf("Failed to fetch current working dir: {{err}}", err))
}
monitor, err := watching.NewMonitor(dir)
if err != nil {
log.Fatal(errwrap.Wrapf(fmt.Sprintf("Failed to create monitor for directory '%s': {{err}}"), err))
}
//whenever _something_ happends in any directory of the project delay timeout
timer.Wakeup = monitor.Events()
go func() {
for err := range monitor.Errors() {
log.Printf("Monitor Error: %s", err)
}
}()
err = monitor.Start()
if err != nil {
log.Fatal(errwrap.Wrapf(fmt.Sprintf("Failed to start monitor for directory '%s': {{err}}"), err))
}
m := model.New(dir)
info, err := m.ReadDaemonInfo()
if err != nil {
log.Fatal(errwrap.Wrapf("Failed read Daemon info: {{err}}", err))
}
if info.Addr != "" && !*force {
log.Fatal("It appears another Daemon is already running or a previous instance didn't shutdown properly, use -force to force start.")
}
info = model.NewDeamon(dir, svr.Addr())
err = m.UpsertDaemonInfo(info)
if err != nil {
log.Fatal(errwrap.Wrapf("Failed write Daemon info: {{err}}", err))
}
sig := make(chan os.Signal)
signal.Notify(sig, os.Interrupt)
go func() {
<-sig
svr.Stop()
}()
log.Printf("Listening on '%s'", svr.Addr())
err = svr.Start()
if err != nil && !strings.Contains(err.Error(), "closed network connection") {
log.Fatal(err)
}
log.Printf("Writing information to database...")
info.Addr = ""
err = m.UpsertDaemonInfo(info)
if err != nil {
log.Fatal(errwrap.Wrapf("Failed write Daemon info: {{err}}", err))
}
log.Printf("Done")
}