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--!A cross-platform build utility based on Lua
--
-- Licensed under the Apache License, Version 2.0 (the "License");
-- you may not use this file except in compliance with the License.
-- You may obtain a copy of the License at
--
-- http://www.apache.org/licenses/LICENSE-2.0
--
-- Unless required by applicable law or agreed to in writing, software
-- distributed under the License is distributed on an "AS IS" BASIS,
-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-- See the License for the specific language governing permissions and
-- limitations under the License.
--
-- Copyright (C) 2015-present, Xmake Open Source Community.
--
-- @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("base/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)
-- memory cache?
if scopename:startswith("memory.") then
instance._CACHEDATA = instance._CACHEDATA or {__version = xmake._VERSION_SHORT}
instances[scopename] = instance
return instance
end
-- check scopename
if not scopename:find("local%.") and not scopename:find("global%.") then
os.raise("invalid cache scope: %s", scopename)
end
-- make the cache path
local cachepath = (scopename:gsub("%.", "/"))
cachepath = (cachepath:gsub("^local%/", path.join(config.directory(), "cache") .. "/"))
cachepath = (cachepath:gsub("^global%/", path.join(global.cachedir()) .. "/"))
-- 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_SHORT}
-- save instance
instances[scopename] = instance
-- ok
return instance
end
-- get the cached value
--
-- @param name the cache key
-- @return the cached value
--
function cache:get(name)
return self._CACHEDATA[name]
end
-- set the cached value
--
-- @param name the cache key
-- @param value the value to cache
--
function cache:set(name, value)
self._CACHEDATA[name] = value
end
-- clear all cached values
function cache:clear()
self._CACHEDATA = {__version = xmake._VERSION_SHORT}
end
-- flush cached values to file
function cache:flush()
-- flush the version
self._CACHEDATA.__version = xmake._VERSION_SHORT
-- memory cache? ignore it directly
if not self._CACHEPATH then
return
end
-- 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
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