initial commit

env/lib/python3.10/site-packages/jeepney/bus.py

@@ -0,0 +1,62 @@
+import os
+import re
+
+_escape_pat = re.compile(r'%([0-9A-Fa-f]{2})')
+def unescape(v):
+    def repl(match):
+        n = int(match.group(1), base=16)
+        return chr(n)
+    return _escape_pat.sub(repl, v)
+
+def parse_addresses(s):
+    for addr in s.split(';'):
+        transport, info = addr.split(':', 1)
+        kv = {}
+        for x in info.split(','):
+            k, v = x.split('=', 1)
+            kv[k] = unescape(v)
+        yield (transport, kv)
+
+SUPPORTED_TRANSPORTS = ('unix',)
+
+def get_connectable_addresses(addr):
+    unsupported_transports = set()
+    found = False
+    for transport, kv in parse_addresses(addr):
+        if transport not in SUPPORTED_TRANSPORTS:
+            unsupported_transports.add(transport)
+
+        elif transport == 'unix':
+            if 'abstract' in kv:
+                yield '\0' + kv['abstract']
+                found = True
+            elif 'path' in kv:
+                yield kv['path']
+                found = True
+
+    if not found:
+        raise RuntimeError("DBus transports ({}) not supported. Supported: {}"
+                           .format(unsupported_transports, SUPPORTED_TRANSPORTS))
+
+def find_session_bus():
+    addr = os.environ['DBUS_SESSION_BUS_ADDRESS']
+    return next(get_connectable_addresses(addr))
+    # TODO: fallbacks to X, filesystem
+
+def find_system_bus():
+    addr = os.environ.get('DBUS_SYSTEM_BUS_ADDRESS', '') \
+        or 'unix:path=/var/run/dbus/system_bus_socket'
+    return next(get_connectable_addresses(addr))
+
+def get_bus(addr):
+    if addr == 'SESSION':
+        return find_session_bus()
+    elif addr == 'SYSTEM':
+        return find_system_bus()
+    else:
+        return next(get_connectable_addresses(addr))
+
+
+if __name__ == '__main__':
+    print('System bus at:', find_system_bus())
+    print('Session bus at:', find_session_bus())