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--!The Automatic Cross-platform Build Tool
-- 
-- XMake is free software; you can redistribute it and/or modify
-- it under the terms of the GNU Lesser General Public License as published by
-- the Free Software Foundation; either version 2.1 of the License, or
-- (at your option) any later version.
-- 
-- XMake 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 Lesser General Public License for more details.
-- 
-- You should have received a copy of the GNU Lesser General Public License
-- along with XMake; 
-- If not, see <a href="http://www.gnu.org/licenses/"> http://www.gnu.org/licenses/</a>
-- 
-- Copyright (C) 2009 - 2015, ruki All rights reserved.
--
-- @author      ruki
-- @file        ar.lua
--

-- define module: ar
local ar = ar or {}

-- load modules
local utils     = require("base/utils")
local string    = require("base/string")
local config    = require("base/config")

-- init the linker
function ar.init(self, name)

    -- save name
    self.name = name or "ar"

    -- init arflags
    self.arflags = { "-crs" }

end

-- make the link command
function ar.command_link(self, objfiles, targetfile, flags, logfile)

    -- redirect
    local redirect = ""
    if logfile then redirect = string.format(" > %s 2>&1", logfile) end

    -- make it
    return string.format("%s %s %s %s%s", self.name, flags, targetfile, objfiles, redirect)
end

-- extract the static library to object files
function ar.extract(self, ...)
 
    -- check
    local args = ...
    assert(#args == 2 and self.name)

    -- get library and object file path
    local libfile = args[1]
    local objfile = args[2]
    assert(libfile and objfile)

    -- get object directory
    local objdir = path.directory(objfile)
    if not os.isdir(objdir) then os.mkdir(objdir) end
    if not os.isdir(objdir) then
        utils.error("%s not found!", objdir)
        return false
    end

    -- absolute the library path
    libfile = path.absolute(libfile)
    assert(libfile)

    -- enter the object directory
    ok, errors = os.cd(objdir)
    if not ok then
        utils.error(errors)
        return false
    end

    -- extract it
    local ok = self:main(string.format("%s -x %s", self.name, libfile))
    if not ok then
        utils.error("extract %s to %s failed!", libfile, objdir)
        return false
    end

    -- leave the object directory
    ok, errors = os.cd("-")
    if not ok then
        utils.error(errors)
        return false
    end

    -- ok
    return true
end


-- the main function
function ar.main(self, cmd)

    -- execute it
    local ok = os.execute(cmd)

    -- ok?
    return utils.ifelse(ok == 0, true, false)
end

-- return module: ar
return ar