Another iteration on __init__.py

Ska/engarchive/__init__.py

@@ -3,12 +3,26 @@
 from pkg_resources import get_distribution, DistributionNotFound
 
 try:
-    # Normally use the generic __name__ here, but for the dual Ska.engarchive
-    # and cheta install, hardwire to 'Ska.engarchive' which is the package name.
-    __version__ = get_distribution('Ska.engarchive').version
-except DistributionNotFound:
-    # package is not installed
-    pass
+    _dist = get_distribution('Ska.engarchive')  # hard-code only for this dual-name package
+    __version__ = _dist.version
+    assert __file__.startswith(_dist.location)
+
+except (AssertionError, DistributionNotFound):
+    try:
+        # get_distribution found a different package from this file, must be in source repo
+        from setuptools_scm import get_version
+        from pathlib import Path
+
+        root = Path('..')
+        try:
+            __version__ = get_version(root=root, relative_to=__file__)
+        except LookupError:
+            __version__ = get_version(root=root / '..', relative_to=__file__)
+
+    except Exception:
+        import warnings
+        warnings.warn('Failed to find a package version, setting to 0.0.0')
+        __version__ = '0.0.0'
 
 
 def test(*args, **kwargs):