#!/usr/bin/env lua
-------------------------------------------------------------------------------
-- LuaDoc launcher.
-- @release $Id: luadoc.lua.in,v 1.1 2008/02/17 06:42:51 jasonsantos Exp $
-------------------------------------------------------------------------------

require "luadoc"

-------------------------------------------------------------------------------
-- Print version number.

local function print_version ()
	print (string.format("%s\n%s\n%s", 
		luadoc._VERSION, 
		luadoc._DESCRIPTION, 
		luadoc._COPYRIGHT))
end

-------------------------------------------------------------------------------
-- Print usage message.

local function print_help ()
	print ("Usage: "..arg[0]..[[ [options|files]
Generate documentation from files. Available options are:
  -d path                      output directory path
  -t path                      template directory path
  -h, --help                   print this help and exit
      --noindexpage            do not generate global index page
      --nofiles                do not generate documentation for files
      --nomodules              do not generate documentation for modules
      --doclet doclet_module   doclet module to generate output
      --taglet taglet_module   taglet module to parse input code
  -q, --quiet                  suppress all normal output
  -v, --version                print version information]])
end

local function off_messages (arg, i, options)
	options.verbose = nil
end

-------------------------------------------------------------------------------
-- Process options. TODO: use getopts.
-- @class table
-- @name OPTIONS

local OPTIONS = {
	d = function (arg, i, options)
		local dir = arg[i+1]
		if string.sub (dir, -2) ~= "/" then
			dir = dir..'/'
		end
		options.output_dir = dir
		return 1
	end,
	t = function (arg, i, options)
		local dir = arg[i+1]
		if string.sub (dir, -2) ~= "/" then
			dir = dir..'/'
		end
		options.template_dir = dir
		return 1
	end,
	h = print_help,
	help = print_help,
	q = off_messages,
	quiet = off_messages,
	v = print_version,
	version = print_version,
	doclet = function (arg, i, options)
		options.doclet = arg[i+1]
		return 1
	end,
	taglet = function (arg, i, options)
		options.taglet = arg[i+1]
		return 1
	end,
}

-------------------------------------------------------------------------------

local function process_options (arg)
	local files = {}
	local options = require "luadoc.config"
	local i = 1
	while i <= #arg do
		local argi = arg[i]
		if string.sub (argi, 1, 1) ~= '-' then
			table.insert (files, argi)
		else
			local opt = string.sub (argi, 2)
			if string.sub (opt, 1, 1) == '-' then
				opt = string.gsub (opt, "%-", "")
			end
			if OPTIONS[opt] then
				if OPTIONS[opt] (arg, i, options) then
					i = i + 1
				end
			else
				options[opt] = 1
			end
		end
		i = i+1
	end
	return files, options
end 

-------------------------------------------------------------------------------
-- Main function. Process command-line parameters and call luadoc processor.

function main (arg)
	-- Process options
	local argc = #arg
	if argc < 1 then
		print_help ()
		return
	end
	local files, options = process_options (arg)
	return luadoc.main(files, options)
end

main(arg)
