234 lines
5.7 KiB
Go
234 lines
5.7 KiB
Go
// Copyright (C) 2019 The Syncthing Authors.
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//
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// This Source Code Form is subject to the terms of the Mozilla Public
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// License, v. 2.0. If a copy of the MPL was not distributed with this file,
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// You can obtain one at https://mozilla.org/MPL/2.0/.
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package cli
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import (
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"bufio"
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"crypto/tls"
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"encoding/json"
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"io/ioutil"
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"os"
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"reflect"
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"strings"
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"github.com/AudriusButkevicius/recli"
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"github.com/alecthomas/kong"
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"github.com/flynn-archive/go-shlex"
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"github.com/mattn/go-isatty"
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"github.com/pkg/errors"
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"github.com/urfave/cli"
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"github.com/syncthing/syncthing/cmd/syncthing/cmdutil"
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"github.com/syncthing/syncthing/lib/config"
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"github.com/syncthing/syncthing/lib/events"
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"github.com/syncthing/syncthing/lib/locations"
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"github.com/syncthing/syncthing/lib/protocol"
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)
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type preCli struct {
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GUIAddress string `name:"gui-address"`
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GUIAPIKey string `name:"gui-apikey"`
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HomeDir string `name:"home"`
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ConfDir string `name:"config"`
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DataDir string `name:"data"`
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}
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func Run() error {
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// This is somewhat a hack around a chicken and egg problem. We need to set
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// the home directory and potentially other flags to know where the
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// syncthing instance is running in order to get it's config ... which we
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// then use to construct the actual CLI ... at which point it's too late to
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// add flags there...
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c := preCli{}
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parseFlags(&c)
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// Not set as default above because the strings can be really long.
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err := cmdutil.SetConfigDataLocationsFromFlags(c.HomeDir, c.ConfDir, c.DataDir)
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if err != nil {
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return errors.Wrap(err, "Command line options:")
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}
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guiCfg := config.GUIConfiguration{
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RawAddress: c.GUIAddress,
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APIKey: c.GUIAPIKey,
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}
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// Now if the API key and address is not provided (we are not connecting to a remote instance),
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// try to rip it out of the config.
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if guiCfg.RawAddress == "" && guiCfg.APIKey == "" {
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// Load the certs and get the ID
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cert, err := tls.LoadX509KeyPair(
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locations.Get(locations.CertFile),
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locations.Get(locations.KeyFile),
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)
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if err != nil {
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return errors.Wrap(err, "reading device ID")
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}
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myID := protocol.NewDeviceID(cert.Certificate[0])
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// Load the config
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cfg, _, err := config.Load(locations.Get(locations.ConfigFile), myID, events.NoopLogger)
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if err != nil {
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return errors.Wrap(err, "loading config")
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}
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guiCfg = cfg.GUI()
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} else if guiCfg.Address() == "" || guiCfg.APIKey == "" {
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return errors.New("Both --gui-address and --gui-apikey should be specified")
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}
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if guiCfg.Address() == "" {
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return errors.New("Could not find GUI Address")
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}
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if guiCfg.APIKey == "" {
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return errors.New("Could not find GUI API key")
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}
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client := getClient(guiCfg)
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cfg, cfgErr := getConfig(client)
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original := cfg.Copy()
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// Copy the config and set the default flags
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recliCfg := recli.DefaultConfig
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recliCfg.IDTag.Name = "xml"
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recliCfg.SkipTag.Name = "json"
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configCommand := cli.Command{
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Name: "config",
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HideHelp: true,
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Usage: "Configuration modification command group",
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}
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if cfgErr != nil {
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configCommand.Action = func(*cli.Context) error {
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return cfgErr
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}
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} else {
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configCommand.Subcommands, err = recli.New(recliCfg).Construct(&cfg)
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if err != nil {
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return errors.Wrap(err, "config reflect")
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}
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}
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// Implement the same flags at the upper CLI, but do nothing with them.
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// This is so that the usage text is the same
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fakeFlags := []cli.Flag{
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cli.StringFlag{
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Name: "gui-address",
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Value: "URL",
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Usage: "Override GUI address (e.g. \"http://192.0.2.42:8443\")",
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},
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cli.StringFlag{
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Name: "gui-apikey",
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Value: "API-KEY",
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Usage: "Override GUI API key",
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},
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cli.StringFlag{
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Name: "home",
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Value: "PATH",
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Usage: "Set configuration and data directory",
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},
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cli.StringFlag{
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Name: "conf",
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Value: "PATH",
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Usage: "Set configuration directory (config and keys)",
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},
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}
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// Construct the actual CLI
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app := cli.NewApp()
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app.Author = "The Syncthing Authors"
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app.Metadata = map[string]interface{}{
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"client": client,
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}
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app.Commands = []cli.Command{{
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Name: "cli",
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Usage: "Syncthing command line interface",
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Flags: fakeFlags,
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Subcommands: []cli.Command{
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configCommand,
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showCommand,
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operationCommand,
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errorsCommand,
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debugCommand,
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},
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}}
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tty := isatty.IsTerminal(os.Stdin.Fd()) || isatty.IsCygwinTerminal(os.Stdin.Fd())
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if !tty {
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// Not a TTY, consume from stdin
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scanner := bufio.NewScanner(os.Stdin)
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for scanner.Scan() {
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input, err := shlex.Split(scanner.Text())
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if err != nil {
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return errors.Wrap(err, "parsing input")
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}
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if len(input) == 0 {
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continue
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}
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err = app.Run(append(os.Args, input...))
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if err != nil {
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return err
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}
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}
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err = scanner.Err()
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if err != nil {
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return err
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}
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} else {
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err = app.Run(os.Args)
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if err != nil {
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return err
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}
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}
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if cfgErr == nil && !reflect.DeepEqual(cfg, original) {
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body, err := json.MarshalIndent(cfg, "", " ")
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if err != nil {
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return err
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}
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resp, err := client.Post("system/config", string(body))
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if err != nil {
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return err
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}
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if resp.StatusCode != 200 {
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body, err := responseToBArray(resp)
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if err != nil {
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return err
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}
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return errors.New(string(body))
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}
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}
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return nil
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}
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func parseFlags(c *preCli) error {
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// kong only needs to parse the global arguments after "cli" and before the
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// subcommand (if any).
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if len(os.Args) <= 2 {
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return nil
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}
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args := os.Args[2:]
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for i := 0; i < len(args); i++ {
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if !strings.HasPrefix(args[i], "--") {
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args = args[:i]
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break
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}
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if !strings.Contains(args[i], "=") {
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i++
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}
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}
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// We don't want kong to print anything nor os.Exit (e.g. on -h)
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parser, err := kong.New(c, kong.Writers(ioutil.Discard, ioutil.Discard), kong.Exit(func(int) {}))
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if err != nil {
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return err
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}
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_, err = parser.Parse(args)
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return err
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}
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