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7 changes: 6 additions & 1 deletion Lib/mutatorMath/ufo/document.py
Original file line number Diff line number Diff line change
Expand Up @@ -502,12 +502,17 @@ def readSources(self):
</source>

"""
for sourceElement in self.root.findall(".sources/source"):
for sourceCount, sourceElement in enumerate(self.root.findall(".sources/source")):
# shall we just read the UFO here?
filename = sourceElement.attrib.get('filename')
# filename is a path relaive to the documentpath. resolve first.
sourcePath = os.path.abspath(os.path.join(os.path.dirname(self.path), filename))
sourceName = sourceElement.attrib.get('name')
if sourceName is None:
# if the source element has no name attribute
# (some authoring tools do not need them)
# then we should make a temporary one. We still need it for reference.
sourceName = "temp_master.%d"%(sourceCount)
self.reportProgress("prep", 'load', sourcePath)
if not os.path.exists(sourcePath):
raise MutatorError("Source not found at %s"%sourcePath)
Expand Down