comparison mercurial/encoding.py @ 50995:80c243eab724

openvms: duck-punch a bugfix into `environb` object

The official Python3 build for OpenVMS has some crippling bug that we need to
patch dynamically

OpenVMS patches

50994:a97f2b50219b

# encoding.environ is provided read-only, which may not be used to modify
# the process environment
_nativeenviron = os.supports_bytes_environ
if _nativeenviron:
    environ = os.environb  # re-exports
else:
    # preferred encoding isn't known yet; use utf-8 to avoid unicode error
    # and recreate it once encoding is settled
    environ = {
        k.encode('utf-8'): v.encode('utf-8')

50995:80c243eab724

# encoding.environ is provided read-only, which may not be used to modify
# the process environment
_nativeenviron = os.supports_bytes_environ
if _nativeenviron:
    environ = os.environb  # re-exports
    if pycompat.sysplatform == b'OpenVMS':
        # workaround for a bug in VSI 3.10 port
        # os.environb is only populated with a few Predefined symbols
        def newget(self, key, default=None):
            # pytype on linux does not understand OpenVMS special modules
            import _decc  # pytype: disable=import-error

            v = _decc.getenv(key, None)
            if isinstance(key, bytes):
                return default if v is None else v.encode('latin-1')
            else:
                return default if v is None else v

        environ.__class__.get = newget
else:
    # preferred encoding isn't known yet; use utf-8 to avoid unicode error
    # and recreate it once encoding is settled
    environ = {
        k.encode('utf-8'): v.encode('utf-8')