Cannot build from source with 3.15t

[clin1234]

Collecting pipdeptree
  Downloading pipdeptree-4.1.0.tar.gz (135 kB)
  Installing build dependencies: started
  Installing build dependencies: finished with status 'done'
  Getting requirements to build wheel: started
  Getting requirements to build wheel: finished with status 'done'
  Preparing metadata (pyproject.toml): started
  Preparing metadata (pyproject.toml): finished with status 'error'
  error: subprocess-exited-with-error
  
  × Preparing metadata (pyproject.toml) did not run successfully.
  │ exit code: 1
  ╰─> [25 lines of output]
      + meson setup /tmp/pip-install-_529znep/pipdeptree_c9a660b6263b4735b6575bdf65ae4f78 /tmp/pip-install-_529znep/pipdeptree_c9a660b6263b4735b6575bdf65ae4f78/.mesonpy-f657gk5t -Dbuildtype=release -Db_ndebug=if-release -Db_vscrt=md --native-file=/tmp/pip-install-_529znep/pipdeptree_c9a660b6263b4735b6575bdf65ae4f78/.mesonpy-f657gk5t/meson-python-native-file.ini
      The Meson build system
      Version: 1.11.2
      Source dir: /tmp/pip-install-_529znep/pipdeptree_c9a660b6263b4735b6575bdf65ae4f78
      Build dir: /tmp/pip-install-_529znep/pipdeptree_c9a660b6263b4735b6575bdf65ae4f78/.mesonpy-f657gk5t
      Build type: native build
      Project name: pipdeptree
      Project version: 4.1.0
      Host machine cpu family: x86_64
      Host machine cpu: x86_64
      Program python found: YES (/home/cc/venv/bin/python3.15t)
      Program cargo found: YES (/home/cc/.cargo/bin/cargo)
      Build targets in project: 1
      
      pipdeptree 4.1.0
      
        User defined options
          Native files: /tmp/pip-install-_529znep/pipdeptree_c9a660b6263b4735b6575bdf65ae4f78/.mesonpy-f657gk5t/meson-python-native-file.ini
          b_ndebug    : if-release
          b_vscrt     : md
          buildtype   : release
      
      Found ninja-1.13.0.git.kitware.jobserver-pipe-1 at /tmp/pip-build-env-jlryak8k/overlay/bin/ninja
      
      meson-python: error: The package targets Python's Limited API, which is not supported by free-threaded CPython. The "python.allow_limited_api" Meson build option may be used to override the package default.
      [end of output]
  
  note: This error originates from a subprocess, and is likely not a problem with pip.
error: metadata-generation-failed

× Encountered error while generating package metadata.
╰─> pipdeptree

[darekwojciechowski]

That's not your setup. pipdeptree has limited-api = true in pyproject.toml, and meson-python refuses the limited API on any free-threaded interpreter. There's no cp315t wheel published yet, so pip falls back to the sdist and hits that wall.

PR #643 is already open to flip the default off for source builds. Until it merges, pass the option yourself:

pip install --config-settings=setup-args=-Dpython.allow_limited_api=false pipdeptree

It's the same flag the project already sets in its own cibuildwheel overrides for cp3*t wheels. You end up with a per-interpreter extension instead of an abi3 one, which is what 3.15t needs anyway.

[gaborbernat]

https://github.com/tox-dev/pipdeptree/releases/tag/4.1.2