Support to inherit base package

[waruqi]

I can use this feature set_base to override the partial configuration of builtin package in xmake-repo.

Override package configuration

for example: override package urls, ...

package("myzlib")
    set_base("zlib")
    set_urls("https://github.com/madler/zlib.git")
package_end()

add_requires("myzlib", {system = false, alias = "zlib"})

target("test")
    set_kind("binary")
    add_files("src/*.c")
    add_packages("zlib")

Define alias package in repositories

like this, an alias package(onetbb -> tbb): https://github.com/xmake-io/xmake-repo/blob/master/packages/o/onetbb/xmake.lua

package("onetbb", {base = "tbb"})

or

package("onetbb")
    set_base("tbb")

xmake.lua

add_requires("onetbb")

Related issues: #2010

[maximegmd]

Does this mean we can also add versions without making a PR?

[waruqi]

Does this mean we can also add versions without making a PR?

You can do it, but I still hope you can open pr to help update the package versions in the repository.