commit https://github.com/vim/vim/commit/6f3a544228c1faf92211cbaf8bbedb1dff883f90 Author: Bram Moolenaar <Bram@vim.org> Date: Sat Feb 20 19:56:13 2016 +0100 patch 7.4.1372 Problem: channel read implementation is incomplete. Solution: Add ch_read() and options for ch_readraw().

@echo off
rem batch file to start Vim with less.vim.
rem Read stdin if no arguments were given.
rem Written by Ken Takata.

if "%1"=="" (
  vim --cmd "let no_plugin_maps = 1" -c "runtime! macros/less.vim" -
) else (
  vim --cmd "let no_plugin_maps = 1" -c "runtime! macros/less.vim" %*
)