Fix case where egg-link is not lower case

Before this, ZEO.egg-link was not found

nxdbom/__init__.py

@@ -224,13 +224,14 @@ def bom_software(installed_software_path): # -> {} (name,kind) -> PkgInfo
                     continue        # because software.cfg contained vspace
                 m = _egg_re.match(eggname)
                 assert m is not None, eggname
-                eggname = m.group('name')   # neoppod[admin, ctl, master] -> neoppod
-                eggname = eggcanon(eggname) # cython-zstd -> cython_zstd
+                eggfilename = m.group('name')   # neoppod[admin, ctl, master] -> neoppod
+                eggfilename = eggcanon(eggfilename)
+                eggname = eggfilename.lower() # cython-zstd -> cython_zstd
 
                 if eggname in xeggs:
                     continue    # we already reported this egg via scripts above
 
-                if glob('%s/%s.egg-link' % (eggdev, eggname)):
+                if glob('%s/%s.egg-link' % (eggdev, eggfilename)):
                     continue # e.g. wendelin.core.egg-link points to wendelin.core cloned via git and already reported as git
 
                 installed_eggs = [basename(_) for _ in (glob('%s/*.egg' % eggdir) +
@@ -278,7 +279,7 @@ _egg_re = re.compile(r'^(?P<name>[\w\-\.]+)(\[.*\])?$')
 # eggcanon returns canonical name for an egg.
 # e.g. Cython-Zstd -> cython_zstd
 def eggcanon(eggname):
-    return eggname.lower().replace('-', '_')
+    return eggname.replace('-', '_')
 
 
 # eggscript_imports returns list of eggs put into python path in python script