add cache module

1 files changed, 111 insertions, 0 deletions

diff --git a/xmake/core/project/cache.lua b/xmake/core/project/cache.lua
new file mode 100644
index 000000000..78eb6a188
--- /dev/null
+++ b/xmake/core/project/cache.lua
@@ -0,0 +1,111 @@
+--!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) 2015 - 2016, ruki All rights reserved.
+--
+-- @author      ruki
+-- @file        cache.lua
+--
+
+-- define module
+local cache = cache or {}
+
+-- load modules
+local io            = require("base/io")
+local os            = require("base/os")
+local path          = require("base/path")
+local table         = require("base/table")
+local utils         = require("base/utils")
+local config        = require("project/config")
+local global        = require("project/global")
+
+-- the cache instance
+--
+-- @param scopename     local.xxxx
+--                      global.xxxx
+--
+function cache._instance(scopename)
+
+    -- check
+    assert(scopename)
+
+    -- init instances
+    cache._INSTANCES = cache._INSTANCES or {}
+    local instances = cache._INSTANCES
+
+    -- this instance has been initialized?
+    if instances[scopename] then
+        return instances[scopename]
+    end
+
+    -- init instance
+    local instance = table.inherit(cache)
+
+    -- make the cache path
+    local cachepath = (scopename:gsub("%.", "/"))
+    cachepath = (cachepath:gsub("^local%/", path.join(config.directory(), "cache") .. "/"))
+    cachepath = (cachepath:gsub("^global%/", path.join(global.directory(), "cache") .. "/"))
+
+    -- save the cache path 
+    instance._CACHEPATH = cachepath
+
+    -- load the cache data 
+    local results = io.load(cachepath)
+    if results then
+        instance._CACHEDATA = results
+    end
+    instance._CACHEDATA = instance._CACHEDATA or {__version = xmake._VERSION}
+
+    -- save instance
+    instances[scopename] = instance
+
+    -- ok
+    return instance
+end
+
+-- get the value
+function cache:get(name)
+
+    -- get it
+    return self._CACHEDATA[name]
+end
+
+-- set the value
+function cache:set(name, value)
+
+    -- set it
+    self._CACHEDATA[name] = value
+end
+
+-- clear all
+function cache:clear()
+
+    -- clear it
+    self._CACHEDATA = {__version = xmake._VERSION}
+end
+
+-- flush to cache file
+function cache:flush()
+
+    -- save to file
+    local ok, errors = io.save(self._CACHEPATH, self._CACHEDATA) 
+    if not ok then
+        os.raise(errors)
+    end
+end
+
+-- return module
+return cache._instance