build command doesn't detect version from latest git tag from inside a sub-folder

[TommyDuc]

Steps to reproduce

In an empty directory:

git init
mkdir -p python/src
touch python/src/__init__.py
cd python
# copy pyproject.toml below
pdm lock
git add '*'
git commit -m "first commit"
git tag v1.0.0
pdm build -v
ls dist

Content of python/pyproject.toml:

[project]
name = "python-test-project"
dynamic = ["version"]
dependencies = []
requires-python = ">=3.8"

[tool.pdm]
version = { use_scm = true }

[build-system]
requires = ["pdm-pep517>=1.0"]
build-backend = "pdm.pep517.api"

Actual behavior

python_test_project-0.0.0-py3-none-any.whl python-test-project-0.0.0.tar.gz

Expected behavior

python_test_project-1.0.0-py3-none-any.whl python-test-project-1.0.0.tar.gz

# Paste the output of `pdm info && pdm info --env` below:

PDM version:
2.8.0a2
Python Interpreter:
/home/tommy/projects/misc/test/python/.venv/bin/python (3.11)
Project Root:
/home/tommy/projects/misc/test/python
Local Packages:

{
"implementation_name": "cpython",
"implementation_version": "3.11.1",
"os_name": "posix",
"platform_machine": "x86_64",
"platform_release": "5.15.0-76-generic",
"platform_system": "Linux",
"platform_version": "#83-Ubuntu SMP Thu Jun 15 19:16:32 UTC 2023",
"python_full_version": "3.11.1",
"platform_python_implementation": "CPython",
"python_version": "3.11",
"sys_platform": "linux"
}

[frostming]

Can you change to pdm-backend?

https://pdm-backend.fming.dev/#quick-start

[quag-cactus]

Hello, @TommyDuc @frostming

I was also interested in this issue and tried changing the backend.

# build-system definition of pyproject.toml
[build-system]
requires = ["pdm-backend"]
build-backend = "pdm.backend"

However, an error occurred and the build failed.

Traceback (most recent call last):
  File "/home/ec2-user/.local/bin/pdm", line 8, in <module>
    sys.exit(main())
  File "/home/ec2-user/.local/share/pdm/venv/lib/python3.9/site-packages/pdm/core.py", line 289, in main
    return Core().main(args)
  File "/home/ec2-user/.local/share/pdm/venv/lib/python3.9/site-packages/pdm/core.py", line 207, in main
    raise cast(Exception, err).with_traceback(traceback) from None
  File "/home/ec2-user/.local/share/pdm/venv/lib/python3.9/site-packages/pdm/core.py", line 202, in main
    self.handle(project, options)
  File "/home/ec2-user/.local/share/pdm/venv/lib/python3.9/site-packages/pdm/core.py", line 157, in handle
    command.handle(project, options)
  File "/home/ec2-user/.local/share/pdm/venv/lib/python3.9/site-packages/pdm/cli/commands/build.py", line 110, in handle
    self.do_build(
  File "/home/ec2-user/.local/share/pdm/venv/lib/python3.9/site-packages/pdm/cli/commands/build.py", line 56, in do_build
    loc = SdistBuilder(project.root, project.environment).build(dest, config_settings)
  File "/home/ec2-user/.local/share/pdm/venv/lib/python3.9/site-packages/pdm/builders/sdist.py", line 21, in build
    filename = self._hook.build_sdist(out_dir, config_settings)
  File "/home/ec2-user/.local/share/pdm/venv/lib/python3.9/site-packages/pyproject_hooks/_impl.py", line 292, in build_sdist
    return self._call_hook('build_sdist', {
  File "/home/ec2-user/.local/share/pdm/venv/lib/python3.9/site-packages/pyproject_hooks/_impl.py", line 311, in _call_hook
    self._subprocess_runner(
  File "/home/ec2-user/.local/share/pdm/venv/lib/python3.9/site-packages/pdm/builders/base.py", line 260, in subprocess_runner
    return log_subprocessor(cmd, cwd, extra_environ=env)
  File "/home/ec2-user/.local/share/pdm/venv/lib/python3.9/site-packages/pdm/builders/base.py", line 107, in log_subprocessor
    raise build_error(e) from None
pdm.exceptions.BuildError: Build backend raised error: Showing the last 10 lines of the build output:
    return builder.build(sdist_directory).name
  File "/tmp/pdm-build-env-fwqm4hd8-shared/lib/python3.9/site-packages/pdm/backend/base.py", line 198, in build
    self.initialize(context)
  File "/tmp/pdm-build-env-fwqm4hd8-shared/lib/python3.9/site-packages/pdm/backend/base.py", line 165, in initialize
    self.call_hook("pdm_build_initialize", context)
  File "/tmp/pdm-build-env-fwqm4hd8-shared/lib/python3.9/site-packages/pdm/backend/base.py", line 138, in call_hook
    getattr(hook, hook_name)(context, *args, **kwargs)
  File "/tmp/pdm-build-env-fwqm4hd8-shared/lib/python3.9/site-packages/pdm/backend/hooks/version/__init__.py", line 60, in pdm_build_initialize
    raise ConfigError("tool.pdm.version.source is required")
pdm.backend.exceptions.ConfigError: tool.pdm.version.source is required

There seems to be a problem in pyproject.toml. The following changes made it work.

[tool.pdm]
#version = { use_scm = true }
version = { source = "scm"}

[frostming]

Nice, problem seems solved?

[TommyDuc]

@quag-cactus @frostming Changing the build-system to pdm-backend and tool.pdm.source to {source = "scm"} solved my issue. Thank you!