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#!/usr/bin/env texlua
--[[
Gregorio Windows automatic installation script.
Copyright (C) 2010-2015 Gregorio Project authors

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.

This texlua script is called in Windows automatic installer (see gregorio.iss),
it installs GregorioTeX under Windows.
--]]

require("lfs")

kpse.set_program_name("luatex")

local pathsep = '/'

local function fixpath(path)
  return path
end

local function remove_trailing_slash(path)
  return path:gsub("/$" ,"")
end

local function basename(path)
  return path:gsub("^[^/]+/" ,"")
end

if os.type == "windows" or os.type == "msdos" then
  pathsep = '\\'
  fixpath = function(path)
    return path:gsub("/", "\\")
  end
  remove_trailing_slash = function(path)
    return path:gsub("\\$" ,"")
  end
  basename = function(path)
    return path:gsub("^[^\\]+\\" ,"")
  end
end

local texmflocal = fixpath(kpse.expand_var("$TEXMFLOCAL"))..pathsep
local suffix = "gregoriotex"..pathsep

function io.loaddata(filename,textmode)
  local f = io.open(filename,(textmode and 'r') or 'rb')
  if f then
    local data = f:read('*all')
    f:close()
    return data
  else
    return nil
  end
end

function io.savedata(filename,data,joiner)
  local f = io.open(filename,"wb")
  if f then
    f:write(data or "")
    f:close()
    return true
  else
    return false
  end
end

function copy_one_file(src, dest)
  local destfile = dest..basename(src)
  io.savedata(destfile, io.loaddata(src))
end

function copy_files()
  if not lfs.isdir(texmflocal) then
    lfs.mkdir(texmflocal)
  end
  print("Copying files...\n")
  local texmfbin = kpse.expand_var("$TEXMFDIST")
  texmfbin = fixpath(texmfbin.."/../bin/win32/")
  print("gregorio.exe...")
  copy_one_file("gregorio.exe", texmfbin)
  print("GregorioTeX files...")
  os.spawn("xcopy texmf "..texmflocal.." /e /f /y")
end

function run_texcommands()
  print("Running mktexlsr\n")
  local p = os.spawn("mktexlsr "..texmflocal)
end

local old_base_dirs = {
  fixpath(texmflocal.."tex/generic/gregoriotex"),
  fixpath(texmflocal.."tex/latex/gregoriotex"),
  fixpath(texmflocal.."fonts/ofm/gregoriotex"),
  fixpath(texmflocal.."fonts/tfm/gregoriotex"),
  fixpath(texmflocal.."fonts/type1/gregoriotex"),
  fixpath(texmflocal.."fonts/ovp/gregoriotex"),
  fixpath(texmflocal.."fonts/ovf/gregoriotex"), 
  fixpath(texmflocal.."fonts/map/gregoriotex"),
}

-- should remove the Read-Only flag on files under Windows, but doesn't work, no idea why... even the attrib command in cmd.exe doesn't work...
-- Windows doesn't seem to be a very reliable OS, it should be avoided...
function remove_read_only(filename)
  if os.name == "windows" or os.name == "msdos" then
    os.spawn(string.format("attrib -r \"%s\" /s /d", filename))
  end
end

-- a function removing one file
local function rm_one(filename)
  print("removing "..filename)
  remove_read_only(filename)
  local b, err = os.remove(filename)
  if not b then
    if err then
      print("error: "..err)
    else
      print("error when trying to remove "..filename)
    end
  end
end

-- a function removing a directory with all included files, using the previous one
-- does not work with subdirectories (we shouldn't have any here)
local function rmdirrecursive(dir)
  print("Removing directory "..dir)
  for filename in lfs.dir(dir) do
    if filename ~= "." and filename ~= ".." then
      rm_one(dir..pathsep..filename)
    end
  end
  rm_one(dir)
end

-- gregorio used to be installed in other directories which have precedence
-- over the new ones
function remove_possible_old_install()
  print("Looking for old GregorioTeX files...\n")
  local old_install_was_present = false
  for _, d in pairs(old_base_dirs) do
    print("Looking for "..d.."...")
    if lfs.isdir(d) then
      old_install_was_present = true
      print("Found "..d..", removing...")
      rmdirrecursive(d)
    end
  end
  if old_install_was_present then
    os.spawn("updmap")
  end
end

function main_install()
  remove_possible_old_install()
  copy_files()
  run_texcommands()
  print("Post-install script complete.")
  print("Press return to continue...")
  answer=io.read()
end

function scribus_config()
  local f = io.open('contrib'..pathsep..'900_gregorio.xml', 'r')
  local data = ""
  for l in f:lines() do
    if l:match("executable command") then
      data = data..string.format("	<executable command='texlua \"%s\" \"%%file\" \"%%dir\"'/>\n", lfs.currentdir()..pathsep.."contrib"..pathsep.."gregorio-scribus.lua")
    else
      data = data..l.."\n"
    end
  end
  io.savedata('contrib'..pathsep..'900_gregorio.xml', data)
end

main_install()
scribus_config()