func (lsm *LocalServiceManager) call(serviceMethod string, args interface{}, reply interface{}) error {
lsm.mu.Lock()
defer lsm.mu.Unlock()
if lsm.client == nil {
exe, err := osext.Executable()
if err != nil {
return err
}
listener, err := net.Listen("tcp", "127.0.0.1:0")
if err != nil {
return err
}
defer listener.Close()
runner := exec.Command(exe, "service-runner", "--address", listener.Addr().String(), "--state-file", lsm.stateFile)
runner.Stdout = os.Stdout
runner.Stderr = os.Stderr
go func() {
runner.Run()
lsm.mu.Lock()
lsm.client = nil
lsm.mu.Unlock()
}()
conn, err := listener.Accept()
if err != nil {
return err
}
lsm.client = rpc.NewClient(conn)
}
return lsm.client.Call(serviceMethod, args, reply)
}
func main() {
log.SetFlags(0)
app := cli.NewApp()
app.Name = "stack"
app.Usage = "a simple, cross-platform, open-source, pull-based deployment system"
app.Version = "0.2"
app.Author = "Caleb Doxsey"
app.Email = "*****@*****.**"
app.Commands = []cli.Command{
{
Name: "apply",
Usage: "apply the configuration file",
Action: func(c *cli.Context) {
err := apply(c.Args().First())
if err != nil {
log.Fatalln(err)
}
},
},
{
Name: "auth",
Usage: "generate credentials for services that need it",
Action: func(c *cli.Context) {
if len(c.Args()) < 1 {
log.Fatalln("provider is required")
}
storage.Authenticate(c.Args()[0])
},
},
{
Name: "cp",
Usage: "copy a file: cp <source> <dest>",
Action: func(c *cli.Context) {
if len(c.Args()) < 2 {
log.Fatalln("source and destination arguments are required")
}
err := cp(c.Args()[0], c.Args()[1])
if err != nil {
log.Fatalln(err)
}
},
},
{
Name: "ls",
Usage: "list a directory",
Action: func(c *cli.Context) {
err := ls(c.Args().First())
if err != nil {
log.Fatalln(err)
}
},
},
{
Name: "rm",
Usage: "remove a file",
Action: func(c *cli.Context) {
err := rm(c.Args().First())
if err != nil {
log.Fatalln(err)
}
},
},
{
Name: "service-runner",
Usage: "daemon started by `watch` that runs applications",
Flags: []cli.Flag{
cli.StringFlag{
Name: "address",
Usage: "address to connect to",
},
cli.StringFlag{
Name: "state-file",
Usage: "file to store state in",
},
},
Action: func(c *cli.Context) {
runner.Run(c.String("address"), c.String("state-file"))
},
},
{
Name: "watch",
Usage: "watch a config file",
Action: func(c *cli.Context) {
err := watch(c.Args().First())
if err != nil {
log.Fatalln(err)
}
},
},
}
app.Run(os.Args)
}
