syncthing/cmd/stcli/main.go

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// Copyright (C) 2019 The Syncthing Authors.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at https://mozilla.org/MPL/2.0/.
package main
import (
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"bufio"
"crypto/tls"
"encoding/json"
"flag"
"log"
"os"
"reflect"
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"github.com/AudriusButkevicius/recli"
"github.com/flynn-archive/go-shlex"
"github.com/mattn/go-isatty"
"github.com/pkg/errors"
"github.com/syncthing/syncthing/lib/build"
"github.com/syncthing/syncthing/lib/config"
"github.com/syncthing/syncthing/lib/events"
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"github.com/syncthing/syncthing/lib/locations"
"github.com/syncthing/syncthing/lib/protocol"
"github.com/urfave/cli"
)
func main() {
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// This is somewhat a hack around a chicken and egg problem.
// We need to set the home directory and potentially other flags to know where the syncthing instance is running
// in order to get it's config ... which we then use to construct the actual CLI ... at which point it's too late
// to add flags there...
homeBaseDir := locations.GetBaseDir(locations.ConfigBaseDir)
guiCfg := config.GUIConfiguration{}
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flags := flag.NewFlagSet("", flag.ContinueOnError)
flags.StringVar(&guiCfg.RawAddress, "gui-address", guiCfg.RawAddress, "Override GUI address (e.g. \"http://192.0.2.42:8443\")")
flags.StringVar(&guiCfg.APIKey, "gui-apikey", guiCfg.APIKey, "Override GUI API key")
flags.StringVar(&homeBaseDir, "home", homeBaseDir, "Set configuration directory")
// Implement the same flags at the lower CLI, with the same default values (pre-parse), but do nothing with them.
// This is so that we could reuse os.Args
fakeFlags := []cli.Flag{
cli.StringFlag{
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Name: "gui-address",
Value: guiCfg.RawAddress,
Usage: "Override GUI address (e.g. \"http://192.0.2.42:8443\")",
},
cli.StringFlag{
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Name: "gui-apikey",
Value: guiCfg.APIKey,
Usage: "Override GUI API key",
},
cli.StringFlag{
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Name: "home",
Value: homeBaseDir,
Usage: "Set configuration directory",
},
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}
// Do not print usage of these flags, and ignore errors as this can't understand plenty of things
flags.Usage = func() {}
_ = flags.Parse(os.Args[1:])
// Now if the API key and address is not provided (we are not connecting to a remote instance),
// try to rip it out of the config.
if guiCfg.RawAddress == "" && guiCfg.APIKey == "" {
// Update the base directory
err := locations.SetBaseDir(locations.ConfigBaseDir, homeBaseDir)
if err != nil {
log.Fatal(errors.Wrap(err, "setting home"))
}
// Load the certs and get the ID
cert, err := tls.LoadX509KeyPair(
locations.Get(locations.CertFile),
locations.Get(locations.KeyFile),
)
if err != nil {
log.Fatal(errors.Wrap(err, "reading device ID"))
}
myID := protocol.NewDeviceID(cert.Certificate[0])
// Load the config
cfg, _, err := config.Load(locations.Get(locations.ConfigFile), myID, events.NoopLogger)
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if err != nil {
log.Fatalln(errors.Wrap(err, "loading config"))
}
guiCfg = cfg.GUI()
} else if guiCfg.Address() == "" || guiCfg.APIKey == "" {
log.Fatalln("Both -gui-address and -gui-apikey should be specified")
}
if guiCfg.Address() == "" {
log.Fatalln("Could not find GUI Address")
}
if guiCfg.APIKey == "" {
log.Fatalln("Could not find GUI API key")
}
client := getClient(guiCfg)
cfg, err := getConfig(client)
original := cfg.Copy()
if err != nil {
log.Fatalln(errors.Wrap(err, "getting config"))
}
// Copy the config and set the default flags
recliCfg := recli.DefaultConfig
recliCfg.IDTag.Name = "xml"
recliCfg.SkipTag.Name = "json"
commands, err := recli.New(recliCfg).Construct(&cfg)
if err != nil {
log.Fatalln(errors.Wrap(err, "config reflect"))
}
// Construct the actual CLI
app := cli.NewApp()
app.Name = "stcli"
app.HelpName = app.Name
app.Author = "The Syncthing Authors"
app.Usage = "Syncthing command line interface"
app.Version = build.Version
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app.Flags = fakeFlags
app.Metadata = map[string]interface{}{
"client": client,
}
app.Commands = []cli.Command{
{
Name: "config",
HideHelp: true,
Usage: "Configuration modification command group",
Subcommands: commands,
},
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showCommand,
operationCommand,
errorsCommand,
}
tty := isatty.IsTerminal(os.Stdin.Fd()) || isatty.IsCygwinTerminal(os.Stdin.Fd())
if !tty {
// Not a TTY, consume from stdin
scanner := bufio.NewScanner(os.Stdin)
for scanner.Scan() {
input, err := shlex.Split(scanner.Text())
if err != nil {
log.Fatalln(errors.Wrap(err, "parsing input"))
}
if len(input) == 0 {
continue
}
err = app.Run(append(os.Args, input...))
if err != nil {
log.Fatalln(err)
}
}
err = scanner.Err()
if err != nil {
log.Fatalln(err)
}
} else {
err = app.Run(os.Args)
if err != nil {
log.Fatalln(err)
}
}
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if !reflect.DeepEqual(cfg, original) {
body, err := json.MarshalIndent(cfg, "", " ")
if err != nil {
log.Fatalln(err)
}
resp, err := client.Post("system/config", string(body))
if err != nil {
log.Fatalln(err)
}
if resp.StatusCode != 200 {
body, err := responseToBArray(resp)
if err != nil {
log.Fatalln(err)
}
log.Fatalln(string(body))
}
}
}