Issues with cross-platform lockfiles

[bilelomrani1]

• I have searched the issue tracker and believe that this is not a duplicate.

Steps to reproduce

On a MacOS machine, create the following pyproject.toml

[project]
name = ""
version = ""
description = ""
authors = [
    {name = "", email = ""},
]
dependencies = []
requires-python = ">=3.9"

[project.optional-dependencies]
cpu = [
    'torch==2.0.1 ; sys_platform == "darwin"',
    'torch==2.0.1+cpu ; sys_platform == "linux"',
]

Run the following commands:

$ pdm config pypi.torch.url https://download.pytorch.org/whl/cpu -v
$ pdm lock -G cpu -v
$ pdm sync -G cpu -v

Actual behavior

$ pdm lock -G cpu -v 
STATUS: Resolving dependencies
pdm.termui: ======== Start resolving requirements ========
pdm.termui:   torch==2.0.1+cpu; sys_platform == "linux"
pdm.termui:   python>=3.9
pdm.termui:   Adding requirement torch==2.0.1+cpu; sys_platform == "linux"
pdm.termui:   Adding requirement python>=3.9
pdm.termui: ======== Starting round 0 ========
STATUS: Resolving: new pin python>=3.9
pdm.termui: Pinning: python None
pdm.termui: ======== Ending round 0 ========
pdm.termui: ======== Starting round 1 ========
pdm.termui:   Adding requirement filelock(from torch 2.0.1+cpu)
pdm.termui:   Adding requirement typing-extensions(from torch 2.0.1+cpu)
pdm.termui:   Adding requirement sympy(from torch 2.0.1+cpu)
pdm.termui:   Adding requirement networkx(from torch 2.0.1+cpu)
pdm.termui:   Adding requirement jinja2(from torch 2.0.1+cpu)
STATUS: Resolving: new pin torch 2.0.1+cpu
pdm.termui: Pinning: torch 2.0.1+cpu
pdm.termui: ======== Ending round 1 ========
pdm.termui: ======== Starting round 2 ========
STATUS: Resolving: new pin filelock 3.12.2
pdm.termui: Pinning: filelock 3.12.2
pdm.termui: ======== Ending round 2 ========
pdm.termui: ======== Starting round 3 ========
pdm.termui:   Adding requirement MarkupSafe>=2.0(from jinja2 3.1.2)
STATUS: Resolving: new pin jinja2 3.1.2
pdm.termui: Pinning: jinja2 3.1.2
pdm.termui: ======== Ending round 3 ========
pdm.termui: ======== Starting round 4 ========
STATUS: Resolving: new pin networkx 3.1
pdm.termui: Pinning: networkx 3.1
pdm.termui: ======== Ending round 4 ========
pdm.termui: ======== Starting round 5 ========
pdm.termui:   Adding requirement mpmath>=0.19(from sympy 1.12)
STATUS: Resolving: new pin sympy 1.12
pdm.termui: Pinning: sympy 1.12
pdm.termui: ======== Ending round 5 ========
pdm.termui: ======== Starting round 6 ========
STATUS: Resolving: new pin typing-extensions 4.6.3
pdm.termui: Pinning: typing-extensions 4.6.3
pdm.termui: ======== Ending round 6 ========
pdm.termui: ======== Starting round 7 ========
STATUS: Resolving: new pin MarkupSafe 2.1.3
pdm.termui: Pinning: MarkupSafe 2.1.3
pdm.termui: ======== Ending round 7 ========
pdm.termui: ======== Starting round 8 ========
STATUS: Resolving: new pin mpmath 1.3.0
pdm.termui: Pinning: mpmath 1.3.0
pdm.termui: ======== Ending round 8 ========
pdm.termui: ======== Starting round 9 ========
pdm.termui: ======== Resolution Result ========
pdm.termui: Stable pins:
pdm.termui:              python None
pdm.termui:               torch 2.0.1+cpu
pdm.termui:            filelock 3.12.2
pdm.termui:              jinja2 3.1.2
pdm.termui:            networkx 3.1
pdm.termui:               sympy 1.12
pdm.termui:   typing-extensions 4.6.3
pdm.termui:          markupsafe 2.1.3
pdm.termui:              mpmath 1.3.0
STATUS: Fetching hashes for resolved packages...
pdm.termui: Fetching hashes for filelock@3.12.2
pdm.termui: Fetching hashes for typing-extensions@4.6.3
pdm.termui: Fetching hashes for jinja2@3.1.2
pdm.termui: Fetching hashes for sympy@1.12
pdm.termui: Fetching hashes for networkx@3.1
pdm.termui: Fetching hashes for mpmath@1.3.0
pdm.termui: Fetching hashes for MarkupSafe@2.1.3
pdm.termui: Fetching hashes for torch@2.0.1+cpu
🔒 Lock successful
Changes are written to pdm.lock.

$ pdm sync -G cpu -v
STATUS: Resolving packages from lockfile...
STATUS: Fetching hashes for resolved packages...
All packages are synced to date, nothing to do.

🎉 All complete!

Expected behavior

When syncing, torch for MacOS should be installed. The dependency 'torch==2.0.1 ; sys_platform == "darwin"' is currently ignored.

Environment Information

$ pdm info && pdm info --env
PDM version:
  2.7.4
Python Interpreter:
  /Users/bilelomrani/.pyenv/versions/3.9.16/envs/test-pdm/bin/python (3.9)
Project Root:
  /Users/bilelomrani/Documents/ILLUIN.nosync/test-torch-package
Local Packages:

{
  "implementation_name": "cpython",
  "implementation_version": "3.9.16",
  "os_name": "posix",
  "platform_machine": "x86_64",
  "platform_release": "22.3.0",
  "platform_system": "Darwin",
  "platform_version": "Darwin Kernel Version 22.3.0: Mon Jan 30 20:42:11 PST 2023; root:xnu-8792.81.3~2/RELEASE_X86_64",
  "python_full_version": "3.9.16",
  "platform_python_implementation": "CPython",
  "python_version": "3.9",
  "sys_platform": "darwin"
}

[frostming]

We currently not support multiple specifications for the same package.

As a workaround, you put them in different groups and create two lockfiles for them separately.