Fix cothread version parsing to handle suffixes (#31)

Fix cothread version parsing to handle suffixes

These suffixes are auto-generated from setuptools_scm, and are not
usually just integers

src/python/epicscorelibs/path/cothread.py

@@ -18,8 +18,14 @@ def check_cothread_order():
     if "cothread" not in sys.modules:
         return
     cothread = sys.modules.get("cothread")
+
+    # Slice to first two elements to avoid attempting to parse certain types
+    # of auto-generated version numbers that are generated from setuptools_scm
+    # inside of cothread. e.g. trying to install directly from Github yields a
+    # version like "2.20.1.dev1+g82e2778.d20241105".
+    ver = tuple(int(c) for c in cothread.__version__.split(".")[:2])
+
     # >= 2.16 will attempt to import this module
-    ver = tuple(int(c) for c in cothread.__version__.split("."))
     if ver < (2, 16):
         warnings.warn("epicscorelibs.path.cothread must be imported before cothread.catools to have effect")