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#!/usr/bin/env texlua
--*-Lua-*-
-- $Id$

-- Copyright (C) 2007 Reinhard Kotucha.
-- You may freely use, modify and/or distribute this file.

-- Replacement for pdf2dsc.bat.
-- Convert PDF to DSC

function fixwin (args_unix)
   if os.type == 'windows' then
      local args_win={}  -- new table
      args_win[0]=args_unix[1]
      for i=1, #args_unix do  
	 args_win[i]='"'..args_unix[i]..'"'
      end
      return args_win
   else
      return args_unix
   end
end


local function push (t, ...)
   local args={...}
   for _,v in ipairs(args) do
      if type(v) == 'table' then
	 for _,x in ipairs(v) do
	    t[#t+1]=x
	 end
      else
	 t[#t+1]=v
      end
   end
end


if #arg ~= 2 then
   io.stderr:write('Usage: pdf2dsc input.pdf [output.dsc]\n')
   os.exit(1)
end

pdffile=arg[1]
if #arg==2 then
   dscfile=arg[2]
else
   dscfile=string.gsub(pdffile, '%.%a+$', '.dsc')
end

-- setup command

local command={}
if os.type == 'unix' then command={'gs'} else command={'gswin32c'} end

push(command, '-q', '-dNODISPLAY', '-dSAFER', '-dDELAYSAFER',
     '-sPDFname='..pdffile, '-sDSCname='..dscfile, 'pdf2dsc.ps',
     '-c', 'quit')

command=fixwin(command)

--[[ prepend an additional hyphen to activate this code
for i=0, #command do
   print (command[i])
end
os.exit(0)
--]]

ret=os.spawn(command)
os.exit(ret)