cmd/syncthing/cli: Update recli, fix stdin handling (fixes #7685, fixes #7673) (#7694)

cmd/syncthing/cli/main.go

@@ -8,13 +8,13 @@ package cli
 
 import (
 	"bufio"
+	"fmt"
 	"io/ioutil"
 	"os"
 	"strings"
 
 	"github.com/alecthomas/kong"
 	"github.com/flynn-archive/go-shlex"
-	"github.com/mattn/go-isatty"
 	"github.com/pkg/errors"
 	"github.com/urfave/cli"
 
@@ -97,38 +97,41 @@ func Run() error {
 			operationCommand,
 			errorsCommand,
 			debugCommand,
+			{
+				Name:     "-",
+				HideHelp: true,
+				Usage:    "Read commands from stdin",
+				Action: func(ctx *cli.Context) error {
+					if ctx.NArg() > 0 {
+						return errors.New("command does not expect any arguments")
+					}
+
+					// Drop the `-` not to recurse into self.
+					args := make([]string, len(os.Args)-1)
+					copy(args, os.Args)
+
+					fmt.Println("Reading commands from stdin...", args)
+					scanner := bufio.NewScanner(os.Stdin)
+					for scanner.Scan() {
+						input, err := shlex.Split(scanner.Text())
+						if err != nil {
+							return errors.Wrap(err, "parsing input")
+						}
+						if len(input) == 0 {
+							continue
+						}
+						err = app.Run(append(args, input...))
+						if err != nil {
+							return err
+						}
+					}
+					return scanner.Err()
+				},
+			},
 		},
 	}}
 
-	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 {
-				return errors.Wrap(err, "parsing input")
-			}
-			if len(input) == 0 {
-				continue
-			}
-			err = app.Run(append(os.Args, input...))
-			if err != nil {
-				return err
-			}
-		}
-		err = scanner.Err()
-		if err != nil {
-			return err
-		}
-	} else {
-		err = app.Run(os.Args)
-		if err != nil {
-			return err
-		}
-	}
-
-	return nil
+	return app.Run(os.Args)
 }
 
 func parseFlags(c *preCli) error {

go.mod

@@ -2,7 +2,7 @@ module github.com/syncthing/syncthing
 
 require (
 	github.com/AudriusButkevicius/pfilter v0.0.0-20210511165305-e9aaf99ab213
-	github.com/AudriusButkevicius/recli v0.0.5
+	github.com/AudriusButkevicius/recli v0.0.6
 	github.com/alecthomas/kong v0.2.16
 	github.com/bkaradzic/go-lz4 v0.0.0-20160924222819-7224d8d8f27e
 	github.com/calmh/xdr v1.1.0
@@ -30,7 +30,6 @@ require (
 	github.com/lib/pq v1.10.1
 	github.com/lucas-clemente/quic-go v0.19.3
 	github.com/maruel/panicparse v1.6.1
-	github.com/mattn/go-isatty v0.0.12
 	github.com/maxbrunsfeld/counterfeiter/v6 v6.3.0
 	github.com/minio/sha256-simd v1.0.0
 	github.com/miscreant/miscreant.go v0.0.0-20200214223636-26d376326b75

go.sum

@@ -7,12 +7,10 @@ dmitri.shuralyov.com/html/belt v0.0.0-20180602232347-f7d459c86be0/go.mod h1:JLBr
 dmitri.shuralyov.com/service/change v0.0.0-20181023043359-a85b471d5412/go.mod h1:a1inKt/atXimZ4Mv927x+r7UpyzRUf4emIoiiSC2TN4=
 dmitri.shuralyov.com/state v0.0.0-20180228185332-28bcc343414c/go.mod h1:0PRwlb0D6DFvNNtx+9ybjezNCa8XF0xaYcETyp6rHWU=
 git.apache.org/thrift.git v0.0.0-20180902110319-2566ecd5d999/go.mod h1:fPE2ZNJGynbRyZ4dJvy6G277gSllfV2HJqblrnkyeyg=
-github.com/AudriusButkevicius/pfilter v0.0.0-20210510194644-fad42c10c5ac h1:ua8XsAiW9JrUa97ioh+ZaZu2JeSMrhcQ2peBxSMrqSs=
-github.com/AudriusButkevicius/pfilter v0.0.0-20210510194644-fad42c10c5ac/go.mod h1:EEEtt5r8y0gGHlRFF2+cLx0WUy/rKHnjALmom5E0+74=
 github.com/AudriusButkevicius/pfilter v0.0.0-20210511165305-e9aaf99ab213 h1:9E6vGKdipZ+AAkU19TUb5JQKMf44CGAYMtXDAyfonO4=
 github.com/AudriusButkevicius/pfilter v0.0.0-20210511165305-e9aaf99ab213/go.mod h1:EEEtt5r8y0gGHlRFF2+cLx0WUy/rKHnjALmom5E0+74=
-github.com/AudriusButkevicius/recli v0.0.5 h1:xUa55PvWTHBm17T6RvjElRO3y5tALpdceH86vhzQ5wg=
-github.com/AudriusButkevicius/recli v0.0.5/go.mod h1:Q2E26yc6RvWWEz/TJ/goUp6yXvipYdJI096hpoaqsNs=
+github.com/AudriusButkevicius/recli v0.0.6 h1:hY9KH09vIbx0fYpkvdWbvnh67uDiuJEVDGhXlefysDQ=
+github.com/AudriusButkevicius/recli v0.0.6/go.mod h1:Nhfib1j/VFnLrXL9cHgA+/n2O6P5THuWelOnbfPNd78=
 github.com/Azure/go-ntlmssp v0.0.0-20200615164410-66371956d46c h1:/IBSNwUN8+eKzUzbJPqhK839ygXJ82sde8x3ogr6R28=
 github.com/Azure/go-ntlmssp v0.0.0-20200615164410-66371956d46c/go.mod h1:chxPXzSsl7ZWRAuOIE23GDNzjWuZquvFlgA8xmpunjU=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=