Vendor dependencies with dep

vendor/github.com/pkg/sftp/server_standalone/main.go

@@ -0,0 +1,52 @@
+package main
+
+// small wrapper around sftp server that allows it to be used as a separate process subsystem call by the ssh server.
+// in practice this will statically link; however this allows unit testing from the sftp client.
+
+import (
+	"flag"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"os"
+
+	"github.com/pkg/sftp"
+)
+
+func main() {
+	var (
+		readOnly    bool
+		debugStderr bool
+		debugLevel  string
+		options     []sftp.ServerOption
+	)
+
+	flag.BoolVar(&readOnly, "R", false, "read-only server")
+	flag.BoolVar(&debugStderr, "e", false, "debug to stderr")
+	flag.StringVar(&debugLevel, "l", "none", "debug level (ignored)")
+	flag.Parse()
+
+	debugStream := ioutil.Discard
+	if debugStderr {
+		debugStream = os.Stderr
+	}
+	options = append(options, sftp.WithDebug(debugStream))
+
+	if readOnly {
+		options = append(options, sftp.ReadOnly())
+	}
+
+	svr, _ := sftp.NewServer(
+		struct {
+			io.Reader
+			io.WriteCloser
+		}{os.Stdin,
+			os.Stdout,
+		},
+		options...,
+	)
+	if err := svr.Serve(); err != nil {
+		fmt.Fprintf(debugStream, "sftp server completed with error: %v", err)
+		os.Exit(1)
+	}
+}