private should not duplicate package installation

[SirLynix]

Xmake Version

2.8.9

Operating System Version and Architecture

Windows 11

Describe Bug

When two packages have the same dependencies, but one of them mark it as private, the package is installed twice.

$ xmake f
checking for platform ... windows
checking for architecture ... x64
checking for Microsoft Visual Studio (x64) version ... 2022
note: install or modify (m) these packages (pass -y to skip confirm)?
in xmake-repo:
  -> fast_double_parser v0.7.0 [private, from:foo]
  -> fast_double_parser#1 v0.7.0 [from:bar]
  -> foo latest [runtimes:"MT"]
  -> bar latest [runtimes:"MT"]
please input: y (y/n/m)

Expected Behavior

the private dependency should get installed once

$ xmake f
checking for platform ... windows
checking for architecture ... x64
checking for Microsoft Visual Studio (x64) version ... 2022
note: install or modify (m) these packages (pass -y to skip confirm)?
in xmake-repo:
  -> fast_double_parser v0.7.0 [from:foo, bar]
  -> foo latest [runtimes:"MT"]
  -> bar latest [runtimes:"MT"]
please input: y (y/n/m)

Project Configuration

package("foo")
    add_deps("fast_double_parser", { private = true })
    on_install(function() end)
package_end()

package("bar")
    add_deps("fast_double_parser")
    on_install(function() end)
package_end()

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

add_requires("foo", "bar")

target("test_private")
    set_kind("binary")
    add_files("src/*.cpp")

Additional Information and Error Logs

It doesn't seem the culprit is the config hash here

[waruqi]

This is to fix a previous issue, but I forget which one b95ee9d