Start work on porting the transfer kitten to Go

kittens/transfer/main.go

@@ -0,0 +1,62 @@
+// License: GPLv3 Copyright: 2023, Kovid Goyal, <kovid at kovidgoyal.net>
+
+package transfer
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"strconv"
+	"strings"
+
+	"kitty/tools/cli"
+	"kitty/tools/utils"
+)
+
+var _ = fmt.Print
+
+func read_bypass(loc string) (string, error) {
+	if loc == "" {
+		return "", nil
+	}
+	fdnum, err := strconv.Atoi(loc)
+	if err == nil && fdnum >= 0 && fdnum < 256 && loc[0] >= '0' && loc[0] <= '9' {
+		file := os.NewFile(uintptr(fdnum), loc)
+		defer file.Close()
+		raw, err := io.ReadAll(file)
+		return utils.UnsafeBytesToString(raw), err
+	}
+	if loc == "-" {
+		raw, err := io.ReadAll(os.Stdin)
+		defer os.Stdin.Close()
+		return utils.UnsafeBytesToString(raw), err
+	}
+	switch loc[0] {
+	case '.', '~', '/':
+		if loc[0] == '~' {
+			loc = utils.Expanduser(loc)
+		}
+		raw, err := os.ReadFile(loc)
+		return utils.UnsafeBytesToString(raw), err
+	default:
+		return loc, nil
+	}
+}
+
+func main(cmd *cli.Command, opts *Options, args []string) (rc int, err error) {
+	if err != nil {
+		rc = 1
+	}
+	if opts.PermissionsBypass != "" {
+		val, err := read_bypass(opts.PermissionsBypass)
+		if err != nil {
+			return 1, err
+		}
+		opts.PermissionsBypass = strings.TrimSpace(val)
+	}
+	return
+}
+
+func EntryPoint(parent *cli.Command) {
+	create_cmd(parent, main)
+}

kittens/transfer/main.py

@@ -102,3 +102,4 @@ elif __name__ == '__doc__':
     cd['usage'] = usage
     cd['options'] = option_text
     cd['help_text'] = help_text
+    cd['short_desc'] = help_text

kittens/transfer/rsync.c

@@ -1,3 +1,4 @@
+//go:build exclude
 /*
  * rsync.c
  * Copyright (C) 2021 Kovid Goyal <kovid at kovidgoyal.net>