Windows rsync batch file

sync.bat

@ECHO OFF
SETLOCAL

SET ARGC=0
FOR %%x IN (%*) DO SET /A ARGC+=1
IF NOT %ARGC%==3 (
  ECHO Usage: %~n0 USER TARGET_HOST TARGET_DIR
  GOTO :eof
)

SET BASEDIR=%~dp0
SET PATH=%BASEDIR%\bin;%PATH%

SET TARGET_USER=%1
SET TARGET_HOST=%2
SET TARGET_DIR=%3

SET SSH_DIR=%BASEDIR%\home\%USERNAME%\.ssh
SET SSH_KEY=%SSH_DIR%\id_ed25519

IF NOT EXIST "%SSH_DIR%" GOTO SETUP_SSH

:RSYNC
rsync -rv --modify-window=1 --update --delete --progress -e "ssh -i '%SSH_KEY%'" -r --files-from include.txt --exclude-from exclude.txt /cygdrive/ %TARGET_USER%@%TARGET_HOST%:%TARGET_DIR%
ssh -i "%SSH_KEY%" %TARGET_USER%@%TARGET_HOST% touch "%TARGET_DIR%/.TIMESTAMP"

GOTO :eof

:SETUP_SSH
mkdir "%SSH_DIR%"
ssh-keygen -o -a 100 -t ed25519 -N "" -q -f "%SSH_KEY%"
type "%SSH_KEY%.pub" | ssh %TARGET_USER%@%TARGET_HOST% "mkdir -p .ssh && cat >> .ssh/authorized_keys"
GOTO RSYNC