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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.base.bytes")
import("core.base.hashset")
import("core.project.config")
-- is enabled?
function is_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
-- is supported?
function is_supported(sourcekind)
local sourcekinds = _g.sourcekinds
if sourcekinds == nil then
sourcekinds = hashset.of("cc", "cxx", "mm", "mxx")
_g.sourcekinds = sourcekinds
end
return sourcekinds:has(sourcekind)
end
-- get cache key
function cachekey(program, cppfile, cppflags, envs)
local items = {program}
for _, cppflag in ipairs(cppflags) do
table.insert(items, cppflag)
end
table.sort(items)
table.insert(items, hash.xxhash128(cppfile))
if envs then
local basename = path.basename(program)
if basename == "cl" then
for _, name in ipairs({"WindowsSDKVersion", "VCToolsVersion", "LIB"}) do
local val = envs[name]
if val then
table.insert(items, val)
end
end
end
end
return hash.xxhash128(bytes(table.concat(items, "")))
end
-- get cache root directory
function rootdir()
return path.join(config.buildir(), ".build_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
-- build with cache
function build(program, argv, opt)
-- do preprocess
opt = opt or {}
local preprocess = assert(opt.preprocess, "preprocessor not found!")
local compile = assert(opt.compile, "compiler not found!")
local cppinfo = preprocess(program, argv, opt)
if cppinfo then
local cachekey = cachekey(program, cppinfo.cppfile, cppinfo.cppflags, opt.envs)
local objectfile_cached = get(cachekey)
if objectfile_cached then
os.cp(objectfile_cached, cppinfo.objectfile)
else
-- do compile
compile(program, cppinfo, opt)
if cachekey then
put(cachekey, cppinfo.objectfile)
end
end
os.rm(cppinfo.cppfile)
end
return cppinfo
end
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