Options are visible only in the config phase

[davidchisnall]

Xmake Version

v2.7.2+dev.d9595826e

Operating System Version and Architecture

FreeBSD

Describe Bug

Options can be set during the configure phase, but they are not then visible during the build. Simple test case:

option("test")
        set_default(false)

target("target")
        add_files("foo.c")
        add_options("test")
        on_load(function (target)
                import("core.base.option")
                print("Option: ", option.get("test"))
                target:add('defines', 'FOO='..tostring(option.get("test")))
        end)

During configuration:

$ xmake f --test=y
Option:  true

Then when you build:

$ xmake
Option:  false

It's not clear how configuration options should be persisted. I cannot specify the option at build time:

$ xmake --test=y
xmake v2.7.2+dev.d9595826e, A cross-platform build utility based on Lua
...
error: Invalid option: --test=y

Other options that I have used persist for a few builds but get lost at some later point.

Expected Behavior

$ xmake
Option:  true

Project Configuration

No response

Additional Information and Error Logs

No response

[waruqi]

please use has_config, get_config or core.project.config module.

if has_config("test") then
    add_defines("TEST")
end

target("target")
        add_files("foo.c")
        add_options("test")
        on_load(function (target)
             local value = get_config("test")
        end)

target("target")
        add_files("foo.c")
        add_options("test")
        on_load(function (target)
             import("core.project.config")
             local value = config.get("test")
        end)