RE: {Spam?} Re: Lua scripts made into executable on win32 (smalladdition request)

["Dave Nichols" <dave.nichols@...>]

I think its a brilliant trick too and should be supported.
AFAICT its a one line change to luaL_loadfile in lauxlib.c, from this:

  if (c == '#') {  /* Unix exec. file? */
    lf.extraline = 1;
    while ((c = getc(lf.f)) != EOF && c != '\n') ;  /* skip first line */
    if (c == '\n') c = getc(lf.f);
  }

to this:

  if (c == '#' || c == '@') {  /* Unix exec. file or windows batch file? */
    lf.extraline = 1;
    while ((c = getc(lf.f)) != EOF && c != '\n') ;  /* skip first line */
    if (c == '\n') c = getc(lf.f);
  }

Regards,

Dave Nichols
Match-IT Limited
Tel: 0845 1300 510
Fax: 0845 1300 610
mailto:dave.nichols@make247.co.uk
http://www.make247.co.uk

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-----Original Message-----
From: lua-bounces@bazar2.conectiva.com.br
[mailto:lua-bounces@bazar2.conectiva.com.br]On Behalf Of Asko Kauppi
Sent: 17 September 2006 07:27
To: Lua list
Subject: Re: {Spam?} Re: Lua scripts made into executable on win32
(smalladdition request)



He might not want to have the files as .lua, but to comeurflauge
(what's the right spelling?? :( ) them as .bat or .cmd.

I have to say, that TRICK is soooo brilliant (didn't know it can be
done!) that it should be supported.  Just as a tribute to the
brilliant ways people deal with Windows being what it is. :)

-asko


Rici Lake kirjoitti 17.9.2006 kello 6.11:

> Wouldn't it be simpler to use something similar to the instructions
> for associating the perl interpreter with perl scripts, found
> in this irritatingly long URL:
> http://aspn.activestate.com/ASPN/docs/ActivePerl/5.8/faq/Windows/
> ActivePerl-Winfaq4.html#How_do_I_associate_Perl_scripts_
>
> On 16-Sep-06, at 8:12 PM, JAST wrote:
>
>> Lua scripts made into executable on win32 (small
>> addition request)
>>
>>
>> any lua script, can be made in to batch file,
>> example, a script:
>>
>> ---------- LUASCRIPT.LUA ---------
>>
>> print("hello universe!")
>> for k,v in ipairs(arg) print(k,v) end
>>
>> ---------- LUASCRIPT.LUA ---------
>>
>> the script above can be made into batchfile by
>> adding shell commands (see below)
>> lua will ignore those command because they are
>> commented.
>> the command "goto =goto" will just do nothing
>>
>> ---------- LUASCRIPT.BAT ---------
>>
>> goto =goto
>>
>> print("hello universe!")
>> for k,v in ipairs(arg) print(k,v) end
>>
>> --[[
>> :=goto
>> @echo off
>> set f=%0
>> 	if exist "%f%" goto run
>> set f=%0.bat
>> 	if exist "%f%" goto run
>> set f=%~f0
>> 	if exist "%f%" goto run
>> set f=%~$PATH:0
>> 	if exist "%f%" goto run
>> for %%d in (%path%) do if exist "%%d\%0"     set
>> f=%%d\%0
>> 	if exist "%f%" goto run
>> for %%d in (%path%) do if exist "%%d\%0.bat" set
>> f=%%d\%0.bat
>> 	if exist "%f%" goto run
>>
>> :run
>> 	lua.exe "%f%" %1 %2 %3 %4 %5 %6 %7 %8 %9
>> ::]]
>>
>> ---------- LUASCRIPT.BAT ---------
>>
>>
>> after adding this shell commands:
>> you can just type:
>>
>> C:\> luascript.bat arg1 arg2 arg3
>>
>> or
>>
>> C:\> luascript arg1 arg2 arg3
>>
>>
>> BUT there is a small tiny little microscopic
>> problem.
>> it outputs the shell command "goto =goto" too!
>>
>> C:\>luascript arg1 arg2 arg3
>> C:\>goto =goto
>> hello universe!
>> 1       arg1
>> 2       arg2
>> 3       arg3
>> C:\>_
>>
>> this is a large giagantic huge  problem if your
>> script is
>> putting information to stdout!
>>
>> my addition request for lua interpreter is,
>> since,
>> Lua, to allow the use of Lua as a script
>> interpreter in Unix systems,
>> the stand-alone interpreter skips the first line
>> of a chunk if it starts with #.
>> why not the stand-alone interpreter skips the
>> first
>>  line of a chunk if it starts with '#' or '@'.
>>
>> '@' becuase a shell command in Windows prefix
>> with '@'
>> prevents the interpreter from displaying the
>> command onscreen.
>> so the first line of the script will be:
>>
>> @goto =goto
>>
>> '=goto' is an ugly label maybe this is more ok:
>>
>> @goto batchcmd
>>
>> the file will now look like this
>>
>> ---------- LUASCRIPT.BAT ---------
>>
>> @goto batchcmd
>>
>> print("hello universe!")
>> for k,v in ipairs(arg) print(k,v) end
>>
>> --[[
>> :batchcmd
>> @echo off
>> set f=%0
>> 	if exist "%f%" goto run
>> set f=%0.bat
>> 	if exist "%f%" goto run
>> set f=%~f0
>> 	if exist "%f%" goto run
>> set f=%~$PATH:0
>> 	if exist "%f%" goto run
>> for %%d in (%path%) do if exist "%%d\%0"     set
>> f=%%d\%0
>> 	if exist "%f%" goto run
>> for %%d in (%path%) do if exist "%%d\%0.bat" set
>> f=%%d\%0.bat
>> 	if exist "%f%" goto run
>>
>> :run
>> 	lua.exe "%f%" %1 %2 %3 %4 %5 %6 %7 %8 %9
>> ::]]
>>
>> ---------- LUASCRIPT.BAT ---------
>>
>> please!
>>
>>
>>
>> if lua has an option like the '-S' in perl (look
>> for programfile using PATH environment variable)
>> i think its possible to trim the script to this
>>
>> ---------- LUASCRIPT.BAT ---------
>>
>> @goto batchcmd
>>
>> print("hello universe!")
>> for k,v in ipairs(arg) print(k,v) end
>>
>> --[[
>> :batchcmd
>> @lua.exe -S "%0" %1 %2 %3 %4 %5 %6 %7 %8 %9
>> ]]
>>
>> ---------- LUASCRIPT.BAT ---------
>>
>>
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