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main.go
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main.go
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// Copyright 2015 Keybase, Inc. All rights reserved. Use of
// this source code is governed by the included BSD license.
package main
import (
"fmt"
"os"
"os/signal"
"golang.org/x/net/context"
"github.com/keybase/client/go/client"
"github.com/keybase/client/go/libcmdline"
"github.com/keybase/client/go/libkb"
"github.com/keybase/client/go/logger"
keybase1 "github.com/keybase/client/go/protocol"
"github.com/keybase/client/go/service"
rpc "github.com/keybase/go-framed-msgpack-rpc"
)
// Keep this around to simplify things
var G = libkb.G
var cmd libcmdline.Command
type Canceler interface {
Cancel() error
}
func main() {
g := G
g.Init()
go HandleSignals()
err := mainInner(g)
e2 := g.Shutdown()
if err == nil {
err = e2
}
if err != nil {
g.Log.Error(err.Error())
os.Exit(2)
}
}
func warnNonProd(log logger.Logger, e *libkb.Env) {
mode := e.GetRunMode()
if mode != libkb.ProductionRunMode {
log.Warning("Running in %s mode", mode)
}
}
func mainInner(g *libkb.GlobalContext) error {
cl := libcmdline.NewCommandLine(true, client.GetExtraFlags())
cl.AddCommands(client.GetCommands(cl, g))
cl.AddCommands(service.GetCommands(cl, g))
cl.AddHelpTopics(client.GetHelpTopics())
var err error
cmd, err = cl.Parse(os.Args)
if err != nil {
err = fmt.Errorf("Error parsing command line arguments: %s\n", err)
return err
}
if cmd == nil {
return nil
}
if !cl.IsService() {
client.InitUI()
}
if err = g.ConfigureCommand(cl, cmd); err != nil {
return err
}
g.StartupMessage()
warnNonProd(g.Log, g.Env)
if cl.IsService() {
return cmd.Run()
}
// Start the server on the other end, possibly.
// There are two cases in which we do this: (1) we want
// a local loopback server in standalone mode; (2) we
// need to "autofork" it. Do at most one of these
// operations.
if g.Env.GetStandalone() {
if cl.IsNoStandalone() {
return fmt.Errorf("Can't run command in standalone mode")
}
if err := service.NewService(false /* isDaemon */, g).StartLoopbackServer(); err != nil {
if pflerr, ok := err.(libkb.PIDFileLockError); ok {
err = fmt.Errorf("Can't run in standalone mode with a service running (see %q)",
pflerr.Filename)
}
return err
}
} else {
// If this command warrants an autofork, do it now.
if fc := cl.GetForkCmd(); fc == libcmdline.ForceFork || (g.Env.GetAutoFork() && fc != libcmdline.NoFork) {
if err = client.ForkServer(cl, g); err != nil {
return err
}
}
// Whether or not we autoforked, we're now running in client-server
// mode (as opposed to standalone). Register a global LogUI so that
// calls to G.Log() in the daemon can be copied to us. This is
// something of a hack on the daemon side.
if !g.Env.GetDoLogForward() || cl.GetLogForward() == libcmdline.LogForwardNone {
g.Log.Debug("Disabling log forwarding")
} else {
// TODO This triggers a connection to the RPC server before cmd.Run() is
// called, so the command has no way to deal with errors on its own.
// This should probably be moved into RegisterProtocols?
// Also rpc.RegisterProtocolsWithContext seems to automatically add the
// LogUIProtocol?
err := registerGlobalLogUI(g)
if err != nil {
return err
}
}
}
return cmd.Run()
}
func registerGlobalLogUI(g *libkb.GlobalContext) error {
protocols := []rpc.Protocol{client.NewLogUIProtocol()}
if err := client.RegisterProtocols(protocols); err != nil {
return err
}
// Send our current debugging state, so that the server can avoid
// sending us verbose logs when we don't want to read them.
logLevel := keybase1.LogLevel_INFO
if g.Env.GetDebug() {
logLevel = keybase1.LogLevel_DEBUG
}
ctlClient, err := client.GetCtlClient(g)
if err != nil {
return err
}
arg := keybase1.SetLogLevelArg{Level: logLevel}
ctlClient.SetLogLevel(context.TODO(), arg)
return nil
}
func HandleSignals() {
c := make(chan os.Signal, 1)
signal.Notify(c, os.Interrupt)
for {
s := <-c
if s != nil {
G.Log.Debug("trapped signal %v", s)
// if the current command has a Cancel function, then call it:
if canc, ok := cmd.(Canceler); ok {
G.Log.Debug("canceling running command")
if err := canc.Cancel(); err != nil {
G.Log.Warning("error canceling command: %s", err)
}
}
G.Log.Debug("calling shutdown")
G.Shutdown()
G.Log.Error("interrupted")
os.Exit(3)
}
}
}