Fix get version in various scenarios:

- debian use `dist-packages` instead of `site-packages`
- dev version, opt in to use setuptools_scm when possible, for example for non shallow checkout

.gitignore

@@ -3,10 +3,10 @@
 /dist/*
 /RosettaSciIO.egg-info/*
 *__pycache__*
-*test_compilers.o
+*test_compilers.o*
 *pyd
 .spyproject/*
 .idea
 rsciio/bruker/unbcf_fast.c
 rsciio/bruker/*.so
-rsciio/bruker/*.pyd
+rsciio/bruker/*.pyd

pyproject.toml

@@ -114,6 +114,7 @@ include = ["rsciio*"]
 
 [tool.setuptools_scm]
 # Presence enables setuptools_scm, the version will be determine at build time from git
+fallback_version = "0.0+UNKNOWN"
 
 [tool.towncrier]
 package = "rsciio"

rsciio/__init__.py

@@ -16,25 +16,39 @@
 # You should have received a copy of the GNU General Public License
 # along with RosettaSciIO. If not, see <https://www.gnu.org/licenses/#GPL>.
 
+from importlib.metadata import version
 import logging
 import os
 from pathlib import Path
 import yaml
 
 
-if Path(__file__).parent.parent.name == "site-packages":  # pragma: no cover
-    # Tested in the "build" workflow on GitHub CI
-    from importlib.metadata import version
+_logger = logging.getLogger(__name__)
+IO_PLUGINS = []
 
-    __version__ = version("rosettasciio")
-else:
-    # Editable install
-    from setuptools_scm import get_version
+__version__ = version("rosettasciio")
 
-    __version__ = get_version(Path(__file__).parent.parent)
+# For development version, `setuptools_scm` will be used at
+# build time to get the dev version, in case of missing vcs information
+# the fallback version defined in pyproject.toml will be used
+
+# if we have a editable install from a git repository try to use
+# `setuptools_scm` to find a more accurate version:
+# `importlib.metadata` will provide the version at installation
+# time and for editable version this may be different
+
+# we only do that if we have enough git history, e.g. not shallow checkout
+_root = Path(__file__).resolve().parents[1]
+if (_root / ".git").exists() and not (_root / ".git/shallow").exists():
+    try:
+        # setuptools_scm may not be installed
+        from setuptools_scm import get_version
+
+        __version__ = get_version(_root)
+    except ImportError:  # pragma: no cover
+        # setuptools_scm not install, we keep the existing __version__
+        pass
 
-IO_PLUGINS = []
-_logger = logging.getLogger(__name__)
 
 for sub, _, _ in os.walk(os.path.abspath(os.path.dirname(__file__))):
     _specsf = os.path.join(sub, "specifications.yaml")
@@ -45,6 +59,7 @@
             _specs["api"] = "rsciio.%s" % os.path.split(sub)[1]
             IO_PLUGINS.append(_specs)
 
+
 __all__ = [
     "__version__",
     "IO_PLUGINS",