added a function to resolve case insensitive paths in BPySys and an option to use it in BPyImage

- Useful when loading files with saved in windows on a *nix system.

release/scripts/bpymodules/BPySys.py

@@ -12,3 +12,63 @@ def cleanName(name):
 	for ch in invalid:	name = name.replace(ch, '_')
 	return name
 
+def caseInsensitivePath(path, RET_FOUND=False):
+	'''
+	Get a case insensitive path on a case sensitive system
+	
+	RET_FOUND is for internal use only, to avoid too many calls to os.path.exists
+	# Example usage
+	getCaseInsensitivePath('/hOmE/mE/sOmEpAtH.tXt')
+	'''
+	import os # todo, what happens with no os?
+	
+	if os==None:
+		if RET_FOUND:	ret = path, True
+		else:			ret = path
+		return ret
+	
+	if path=='' or os.path.exists(path):
+		if RET_FOUND:	ret = path, True
+		else:			ret = path
+		return ret
+	
+	f = os.path.basename(path) # f may be a directory or a file
+	d = os.path.dirname(path)
+	
+	suffix = ''
+	if not f: # dir ends with a slash?
+		if len(d) < len(path):
+			suffix = path[:len(path)-len(d)]
+
+		f = os.path.basename(d)
+		d = os.path.dirname(d)
+	
+	if not os.path.exists(d):
+		d, found = caseInsensitivePath(d, True)
+		
+		if not found:
+			if RET_FOUND:	ret = path, False
+			else:			ret = path
+			return ret
+	
+	# at this point, the directory exists but not the file
+	
+	try: # we are expecting 'd' to be a directory, but it could be a file
+		files = os.listdir(d)
+	except:
+		if RET_FOUND:	ret = path, False
+		else:			ret = path
+
+	f_low = f.lower()
+	
+	try:	f_nocase = [fl for fl in files if fl.lower() == f_low][0]
+	except:	f_nocase = None
+	
+	if f_nocase:
+		if RET_FOUND:	ret = os.path.join(d, f_nocase) + suffix, True
+		else:			ret = os.path.join(d, f_nocase) + suffix
+		return ret
+	else:
+		if RET_FOUND:	ret = path, False
+		else:			ret = path
+		return ret # cant find the right one, just return the path as is.