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#!/usr/bin/python3
# run this script if you were using a2j bridge with unique port names
# (aka port name including the ALSA client ID)
# and you now use a2j bridge without unique port names.
# The script parse all sessions and modify all RAY-JACKPATCH xml files
# directly present in the session folder.
# for example:
# a2j:USB Keystation 61es [24] (capture): USB Keystation 61es MIDI 1
# will become :
# a2j:USB Keystation 61es (capture): USB Keystation 61es MIDI 1
# in all RAY-JACKPATCH files.
import xml.etree.ElementTree as ET
from typing import Iterator, Optional
import subprocess
import os
def ray_control(*args: list[str]) -> Optional[str]:
process: subprocess.CompletedProcess[bytes] = subprocess.run(
['ray_control', *args], capture_output=True)
stdout_bytes = process.stdout
if stdout_bytes is None:
print('ray_control', ' '.join(args), 'returns empty output')
return None
stdout_str = stdout_bytes.decode()
if stdout_str.endswith('\n'):
stdout_str = stdout_str[:-1]
return stdout_str
def modify_file(file_path: str) -> bool:
try:
tree = ET.parse(file_path)
except BaseException as e:
print(e)
return False
root = tree.getroot()
if root.tag != 'RAY-JACKPATCH':
print(f"{file_path} is not a RAY-JACKPATCH xml file")
return False
# prepare avoid duplicated connections
reworked_conns = set[tuple[str, str]]()
childs_to_remove = list[ET.Element]()
file_worked = False
for child in root:
if child.tag == 'connection':
port_from: str = child.attrib.get('from')
port_to: str = child.attrib.get('to')
conn_worked = False
if port_from.startswith('a2j:') and '] (capture): ' in port_from:
prefix, ch, suffix = port_from.partition('] (capture): ')
while prefix and prefix[-1].isdigit():
prefix = prefix[:-1]
if prefix.endswith('['):
prefix = prefix[:-1]
conn_worked = True
child.attrib['from'] = f"{prefix}(capture): {suffix}"
if port_to.startswith('a2j:') and '] (playback): ' in port_to:
prefix, ch, suffix = port_to.partition('] (playback): ')
while prefix and prefix[-1].isdigit():
prefix = prefix[:-1]
if prefix.endswith('['):
prefix = prefix[:-1]
conn_worked = True
child.attrib['to'] = f"{prefix}(playback): {suffix}"
if ((child.attrib.get('from'), child.attrib.get('to'))
in reworked_conns):
childs_to_remove.append(child)
if conn_worked:
reworked_conns.add(
(child.attrib.get('from'), child.attrib.get('to')))
file_worked = True
if not file_worked:
print('nothing to do in', file_path)
return False
for child in childs_to_remove:
root.remove(child)
print('modifying', file_path)
tree = ET.ElementTree(root)
try:
tree.write(file_path)
except Exception as e:
print(e)
return False
return True
def list_patch_files() -> Iterator[str]:
session_root = ray_control('get_root')
all_sessions = ray_control('list_sessions')
for session_name in all_sessions.splitlines():
session_dir = f"{session_root}/{session_name}"
for xml_file in os.listdir(session_dir):
if xml_file.endswith('.xml'):
if xml_file == 'raysession.xml':
continue
yield f"{session_dir}/{xml_file}"
if __name__ == '__main__':
for patchfile in list_patch_files():
modify_file(patchfile)
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