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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, TBOOX Open Source Group.
--
-- @author ruki
-- @file build_cache.lua
--
-- imports
import("core.project.config")
-- is enabled?
function enabled()
local build_cache = _g.build_cache
if build_cache == nil then
build_cache = config.get("ccache") or false
_g.build_cache = build_cache
end
return build_cache or false
end
-- get cache key
function cachekey(program, cppfile, cppflags, envs)
local items = {program}
table.join2(items, cppflags)
table.sort(items)
table.insert(items, hash.sha256(cppfile))
if envs then
for k, v in pairs(table.orderpairs(envs)) do
table.insert(items, k)
table.insert(items, v)
end
end
return (hash.uuid(table.concat(items, "")):gsub("-", "")):lower()
end
-- get cache root directory
function rootdir()
return path.join(config.buildir(), ".cache")
end
-- clean cached files
function clean()
os.rm(rootdir())
end
-- get hit rate
function hitrate()
local hit_count = (_g.hit_count or 0)
local total_count = (_g.total_count or 0)
if total_count > 0 then
return hit_count * 100 / total_count
end
return 0
end
-- get object file
function get(cachekey)
_g.total_count = (_g.total_count or 0) + 1
local objectfile_cached = path.join(rootdir(), cachekey:sub(1, 2):lower(), cachekey)
if os.isfile(objectfile_cached) then
_g.hit_count = (_g.hit_count or 0) + 1
return objectfile_cached
end
end
-- put object file
function put(cachekey, objectfile)
local objectfile_cached = path.join(rootdir(), cachekey:sub(1, 2):lower(), cachekey)
os.cp(objectfile, objectfile_cached)
end
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