Support for dynamic creation and injection of rules and targets

[waruqi]

#2866

[waruqi]

@Arthapz @SirLynix @xq114 Can you help me test your project, like, project generator, ..

I have changed a lot of the logic related to target/rule.

[Arthapz]

@waruqi seem like Ok, doesn't break my projects, but didn't found a way to make my cppfront rule work

[waruqi]

@waruqi seem like Ok, doesn't break my projects, but didn't found a way to make my cppfront rule work

Even though I was able to get the cppfront rules executed first by injecting dependencies, the c++modules dependency scan analysis is not executed in the batchjob, it is still executed early because it is executed during the build batchjob dependency graph phase.

rule("cppfront")
    set_extensions(".cpp2")
    on_load(function (target)
        -- modify and replace the builtin rule
        local rule = target:rule("c++.build.modules.builder"):clone()
        rule:add("deps", "cppfront", {order = true})
        target:rule_add(rule)
    end)
    before_build_file(function (target, sourcefile, opt)
        print("build cppfront file")
    end)

target("test")
    set_kind("binary")
    add_rules("cppfront")
    set_languages("c++20")
    add_files("src/*.cpp", "src/*.mpp")
    add_files("src/*.cpp2")

here

xmake/xmake/rules/c++/modules/xmake.lua

Line 60 in 76bced9

local modules = common.get_module_dependencies(target, sourcebatch, opt)

[  0%]: generating.cxx.module.deps src/main.cpp. -> generate module deps, it is not called in batchjob
[  0%]: generating.cxx.module.deps src/hello.mpp
build cppfront file.   -----------------------------------> before build modules and generate headerunits
[ 25%]: generating.cxx.module.bmi hello
[ 62%]: cache compiling.release src/main.cpp
[ 75%]: linking.release test
[100%]: build ok!