zengine/engine/xmake/rule_tool/xmake.lua

rule("engine.tool")
    after_build(function (target)
        local tooldir = path.join(os.projectdir(), "tools", target:name())
        if not os.isdir(tooldir) then 
            os.mkdir(tooldir)
        end
        local exefile = target:targetfile()
        os.cp(exefile, path.join(tooldir, path.filename(exefile)))
    end)
rule("engine.api")
    on_load(function (target)
        local deps = target:extraconf("rules", "engine.api", "targets")
        deps = deps or {target:name()}
        for k,v in ipairs(deps) do 
            local api = string.upper(v) .. "_API"
            target:add("defines", api.."=__declspec(dllimport)", {interface=true})
            target:add("defines", api.."=__declspec(dllexport)", {public=false})
        end 
    end)