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#!/usr/bin/env python
Reformat a folder of MaterialX documents in place, optionally upgrading
the documents to the latest version of the standard.
import argparse
import xml.etree.ElementTree as ET
import MaterialX as mx
def is_well_formed(xml_string):
    error = ''
        ET.fromstring(xml_string)  
    except ET.ParseError as e:
        error = str(e)
    return error
def main():
    parser = argparse.ArgumentParser(description="Reformat a folder of MaterialX documents in place.")
    parser.add_argument('-y', '--yes', dest='yes', action="store_true", help="Proceed without asking for confirmation from the user.")
    parser.add_argument('-u', '--upgrade', dest='upgrade', action="store_true", help='Upgrade documents to the latest version of the standard.')
    parser.add_argument('-v', '--validate', dest='validate', action="store_true", help='Perform MaterialX validation on documents after reformatting.')
    parser.add_argument('-x', '--xml_syntax', dest='xml_syntax', action="store_true", help='Check XML syntax after reformatting.')
    parser.add_argument(dest="inputFolder", help="An input folder to scan for MaterialX documents.")
    opts = parser.parse_args()
    validDocs = dict()
    for root, dirs, files in os.walk(opts.inputFolder):
        for filename in files:
            fullpath = os.path.join(root, filename)
            if fullpath.endswith('.mtlx'):
                doc = mx.createDocument()
                    readOptions = mx.XmlReadOptions()
                    readOptions.readComments = True
                    readOptions.readNewlines = True    
                    readOptions.upgradeVersion = opts.upgrade
                        mx.readFromXmlFile(doc, fullpath, mx.FileSearchPath(), readOptions)
                    except Exception as err:
                        print('Skipping "' + filename + '" due to exception: ' + str(err))
                        continue
                    validDocs[fullpath] = doc
                except mx.Exception:
    if not validDocs:
        print('No MaterialX documents were found in "%s"' % (opts.inputFolder))
        return
    print('Found %s MaterialX files in "%s"' % (len(validDocs), opts.inputFolder))
    mxVersion = mx.getVersionIntegers()
    if not opts.yes:
        if opts.upgrade:
            question = 'Would you like to upgrade all %i documents to MaterialX v%i.%i in place (y/n)?' % (len(validDocs), mxVersion[0], mxVersion[1])
        else:
            question = 'Would you like to reformat all %i documents in place (y/n)?' % len(validDocs)
        answer = input(question)
        if answer != 'y' and answer != 'Y':
            return
    validate = opts.validate
    if validate:
        print(f'- Validate documents')
    xml_syntax = opts.xml_syntax
    if xml_syntax:
        print(f'- Check XML syntax')
    for (filename, doc) in validDocs.items():
        if xml_syntax:
            xml_string = mx.writeToXmlString(doc)
            errors = is_well_formed(xml_string)
            if errors:
                print(f'- Warning: Document {filename} is not well-formed XML: {errors}') 
        if validate:
            is_valid, errors = doc.validate()
            if not is_valid:
                print(f'- Warning: Document {filename} is invalid. Errors {errors}.')
        mx.writeToXmlFile(doc, filename)
    if opts.upgrade:
        print('Upgraded %i documents to MaterialX v%i.%i' % (len(validDocs), mxVersion[0], mxVersion[1]))
        print('Reformatted %i documents ' % len(validDocs))
if __name__ == '__main__':
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