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Mini Shell
Mini Shell
from .compat import py27, binary_type, string_types
import sys
from sqlalchemy.engine import url
import warnings
import textwrap
import collections
import logging
log = logging.getLogger(__name__)
if py27:
# disable "no handler found" errors
logging.getLogger('alembic').addHandler(logging.NullHandler())
try:
import fcntl
import termios
import struct
ioctl = fcntl.ioctl(0, termios.TIOCGWINSZ,
struct.pack('HHHH', 0, 0, 0, 0))
_h, TERMWIDTH, _hp, _wp = struct.unpack('HHHH', ioctl)
if TERMWIDTH <= 0: # can occur if running in emacs pseudo-tty
TERMWIDTH = None
except (ImportError, IOError):
TERMWIDTH = None
def write_outstream(stream, *text):
encoding = getattr(stream, 'encoding', 'ascii') or 'ascii'
for t in text:
if not isinstance(t, binary_type):
t = t.encode(encoding, 'replace')
t = t.decode(encoding)
try:
stream.write(t)
except IOError:
# suppress "broken pipe" errors.
# no known way to handle this on Python 3 however
# as the exception is "ignored" (noisily) in TextIOWrapper.
break
def status(_statmsg, fn, *arg, **kw):
msg(_statmsg + " ...", False)
try:
ret = fn(*arg, **kw)
write_outstream(sys.stdout, " done\n")
return ret
except:
write_outstream(sys.stdout, " FAILED\n")
raise
def err(message):
log.error(message)
msg("FAILED: %s" % message)
sys.exit(-1)
def obfuscate_url_pw(u):
u = url.make_url(u)
if u.password:
u.password = 'XXXXX'
return str(u)
def warn(msg):
warnings.warn(msg)
def msg(msg, newline=True):
if TERMWIDTH is None:
write_outstream(sys.stdout, msg)
if newline:
write_outstream(sys.stdout, "\n")
else:
# left indent output lines
lines = textwrap.wrap(msg, TERMWIDTH)
if len(lines) > 1:
for line in lines[0:-1]:
write_outstream(sys.stdout, " ", line, "\n")
write_outstream(sys.stdout, " ", lines[-1], ("\n" if newline else ""))
def format_as_comma(value):
if value is None:
return ""
elif isinstance(value, string_types):
return value
elif isinstance(value, collections.Iterable):
return ", ".join(value)
else:
raise ValueError("Don't know how to comma-format %r" % value)
Zerion Mini Shell 1.0