[tex-live] how to get info about Lua interpreter version from command line

[Reinhard Kotucha]

On 2017-06-03 at 07:07:47 +0100, Philip TAYLOR wrote:

 > Reinhard Kotucha wrote:
 > > Try this on the command line:
 > >
 > >    echo '\directlua{print(lua.version)}\end' | luatex | sed -ne '/^\*\*/s/..\(.*\)/\1/p'
 > 
 > Or under Microsoft Windows, at a CMD prompt :
 > 
 > echo \directlua{print(lua.version)}\end | luatex
 > This is LuaTeX, Version 1.0.4 (TeX Live 2017/W32TeX)
 >   restricted system commands enabled.
 > **Lua 5.2

You can install MSYS

  http://www.mingw.org/wiki/msys

on Windows in order to get sed.exe

The command

  sed -ne '/^\*\*/s/..\(.*\)/\1/p'

replaces

  | This is LuaTeX, Version 1.0.4 (TeX Live 2017/W32TeX) 
  |  restricted system commands enabled.
  | **Lua 5.2
  | 
  | warning  (pdf backend): no pages of output.
  | Transcript written on texput.log.

by

  | Lua 5.2

MSYS also provides a lot of other quite useful tools.

Unlike Cygwin, MSYS only depends on MSVCRT.DLL and the only
requirement is that the supplied programs are in %PATH%. 

Regards,
  Reinhard

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Reinhard Kotucha                            Phone: +49-511-3373112
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