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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 xmake.lua
--
-- @usage
--
-- e.g. replace with lua pattern (default)
--
-- add_files("src/foo.c", {rules = "utils.replace", replaces = {{"RDKCONST%);", "VDKREG);"}}})
--
-- e.g. replace with plain text
--
-- add_files("src/foo.c", {rules = "utils.replace", replaces = {{"RDKCONST);", "VDKREG);"}}, replace_plain = true})
--
-- e.g. replace with custom function
--
-- add_files("src/foo.c", {rules = "utils.replace", replaces = function (content)
-- content = content:gsub("old", "new")
-- return content
-- end})
--
rule("utils.replace")
on_prepare_file(function (target, sourcefile, opt)
import("utils.progress")
import("core.base.option")
import("core.project.depend")
-- get replace config from fileconfig
local fileconfig = target:fileconfig(sourcefile)
if not fileconfig or not fileconfig.replaces then
return
end
local replaces = fileconfig.replaces
local use_plain = fileconfig.replace_plain
-- get the replaced file path
local replacefile = target:autogenfile(sourcefile)
-- add the original source directory as includedir,
-- so that relative #include paths still work after replacing
local sourcedir = path.directory(path.absolute(sourcefile))
target:add("includedirs", sourcedir)
-- replace the sourcefile in the build sourcebatch,
-- so that the compiler uses the replaced file instead of the original
for _, sourcebatch in pairs(target:sourcebatches()) do
if sourcebatch.rulename ~= "utils.replace" then
for i, sf in ipairs(sourcebatch.sourcefiles) do
if sf == sourcefile then
sourcebatch.sourcefiles[i] = replacefile
end
end
end
end
-- build values list from replace config for change detection
local depvalues = {}
local is_function = type(replaces) == "function"
if not is_function then
for _, item in ipairs(replaces) do
table.insert(depvalues, item[1])
table.insert(depvalues, item[2])
end
if use_plain then
table.insert(depvalues, "plain")
end
end
-- do replace if source file or replace config is changed
depend.on_changed(function ()
progress.show(opt.progress, "${color.build.object}replacing.$(mode) %s", sourcefile)
vprint("replace %s to %s", sourcefile, replacefile)
local content = io.readfile(sourcefile)
if is_function then
content = replaces(content)
else
if option.get("diagnosis") then
for _, item in ipairs(replaces) do
cprint("${dim} > \"%s\" -> \"%s\"%s", item[1], item[2], use_plain and " (plain)" or "")
end
end
for _, item in ipairs(replaces) do
if use_plain then
content = content:replace(item[1], item[2], {plain = true})
else
content = content:gsub(item[1], item[2])
end
end
end
io.writefile(replacefile, content)
end, {dependfile = target:dependfile(replacefile),
files = {sourcefile},
values = depvalues,
changed = target:is_rebuilt()})
end)
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