global 'before_install' is not callable (a nil value)

[xiao-mang]

为什么before_install不能像on_install一样在target内使用

[waruqi]

你确定？我这不是可以么

target("testi")
    set_kind("binary")
    add_files("src/*.cpp")
    before_install(function (target)
        print("before install")
    end)

ruki-2:testi ruki$ xmake install -o /tmp/xxx
before install
installing testi ..
installing testi to /tmp/xxx ..
install ok!

[xiao-mang]

add_rules("mode.debug", "mode.release")

add_requires("glib")

target("glib")
do
    set_kind("phony")
    add_packages("glib")
end
target_end()

[xiao-mang]

package("glib")

    set_urls("https://github.com/GNOME/glib/archive/refs/tags/$(version).tar.gz")
    add_versions("2.77.3", "baf288fac3b7625d36f0b8f5c63a18e4d1ce15d86e12bc3a64d18cacc20bd5e3")

    local source_dir = "/home/a/port/gvdb"
    local destination_dir = "/home/a/.xmake/cache/packages/2309/g/glib/2.77.3/source/subprojects/gvdb"
    before_install(function (target)
        os.cp(source_dir, destination_dir)
    end)

    add_deps("meson", "ninja")

    on_install("cross@linux", function (package)

        os.vrun("meson --prefix=/home/a/libs/glib_libs --cross-file /home/a/gitlab/glib/cross_aarch64.txt build_730a21d9")
        os.vrun("ninja -C build_730a21d9")
        os.vrun("ninja -C build_730a21d9 install")

    end)

    on_test(function (package)
        assert(os.isfile(path.join(package:installdir("bin"), "glib")))
    end)

[xiao-mang]

因为归档文件没有子模块代码下载，我想要在源码下载解压完成后，在安装前把子模块文件夹复制过去

[waruqi]

包安装没有，也没必要，on_install 最开头复制下不就好了