func buildProcess(
processNames []string,
processes map[string]string,
dir string,
env []string,
port, padding int) procker.Process {
p := []procker.Process{}
for name, command := range processes {
if !mustStart(processNames, name) {
continue
}
process := &procker.SysProcess{
Command: command,
Dir: dir,
Env: append(env, fmt.Sprintf("PORT=%d", port)),
Stdout: procker.NewPrefixedWriter(os.Stdout, prefix(name, padding)),
Stderr: procker.NewPrefixedWriter(os.Stderr, prefix(name, padding)),
SysProcAttr: sysProcAttrs(),
}
log.Printf("starting %s on port %d", name, port)
p = append(p, process)
port++
}
if len(p) == 0 {
fail("no process to run\n")
}
return procker.NewProcessGroup(p...)
}
func start(args []string) {
processes := parseProfile(*startProcfile)
env := parseEnv(*startEnvfile)
dir := path.Dir(*startProcfile)
padding := longestName(processes)
log.SetFlags(0)
log.SetOutput(procker.NewPrefixedWriter(os.Stdout, prefix(programName, padding)))
process := buildProcess(args, processes, dir, env, *startBasePort, padding)
c := make(chan os.Signal, 1)
signal.Notify(c, os.Interrupt)
go func() {
stopping := false
for sig := range c {
if stopping {
log.Printf("%v signal received, killing processes and exiting.", sig)
process.Signal(syscall.SIGKILL)
} else {
log.Printf("%v signal received, stopping processes and exiting.", sig)
stopping = true
go func() {
process.Stop(time.Duration(*startStopTimeout) * time.Second)
}()
}
}
}()
err := process.Start()
failIf(err)
process.Wait()
}
func (a *processApp) buildProcess() (procker.Process, error) {
port, err := FreePort()
if err != nil {
return nil, err
}
a.port = port
p := []procker.Process{}
for name, command := range a.processes {
prefix := fmt.Sprintf("[%s:%s] ", a.Name(), name)
process := &procker.SysProcess{
Command: command,
Dir: a.dir,
Env: append(a.env, fmt.Sprintf("PORT=%d", port)),
Stdout: procker.NewPrefixedWriter(os.Stdout, prefix),
Stderr: procker.NewPrefixedWriter(os.Stderr, prefix),
}
p = append(p, process)
}
return procker.NewProcessGroup(p...), nil
}