How to install package to specific directories?

[nekomiya-kasane]

I used add_require to fetch third-party libraries. XMake fetch them to C:\Users\username\AppData\Local\.xmake\packages, how can I redefine this path so as to make it installed into /root/to/my/project/third_party (functions only for the current project, not globally)?

[waruqi]

https://xmake.io/#/guide/configuration?id=xmake_pkg_installdir

or enable require-lock, it will also install local build directory. https://xmake.io/#/package/remote_package?id=dependent-package-lock-and-upgrade

[nekomiya-kasane]

Could you please provide some details? I tried

on_load(function (package) 
    if not has_config("pkg_installdir") then
        local third_party_dir = "$(projectdir)/ThirdParty"
        os.mkdir(third_party_dir)
        set_config("pkg_installdir", third_party_dir)
    end
    printf("Third party library directory: " .. get_config("pkg_installdir") .. "\n")
end)

But xmake still uses packages downloaded to the previous directory:

2a631882d
checking for cmake ... no
checking for cmake ... D:\scoop_global\apps\mingw-winlibs\current\bin\cmake
checking for xmake::jsoncpp ... no
checking for jsoncpp ... vcpkg::jsoncpp 1.9.5
checking for xmake::eigen ... eigen 3.4.0

I want to force xmake to download all required packages (add_require(...)) to a local folder and use their local copies.

Should I exec a shell command (set XMAKE_PKG_INSTALLDIRid=...) in xmake.lua? But this seems incorrect.

[waruqi]

Should I exec a shell command (set XMAKE_PKG_INSTALLDIRid=...) in xmake.lua? But this seems incorrect.

XMAKE_PKG_INSTALLDIRid -> XMAKE_PKG_INSTALLDIR