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# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
"""
A release-automation toolkit.
Don't use this outside of Twisted.
Maintainer: Christopher Armstrong
"""
import os
# errors
class DirectoryExists(OSError):
"""
Some directory exists when it shouldn't.
"""
pass
class DirectoryDoesntExist(OSError):
"""
Some directory doesn't exist when it should.
"""
pass
class CommandFailed(OSError):
pass
# utilities
def sh(command, null=True, prompt=False):
"""
I'll try to execute C{command}, and if C{prompt} is true, I'll
ask before running it. If the command returns something other
than 0, I'll raise C{CommandFailed(command)}.
"""
print "--$", command
if prompt:
if raw_input("run ?? ").startswith('n'):
return
if null:
command = "%s > /dev/null" % command
if os.system(command) != 0:
raise CommandFailed(command)
def runChdirSafe(f, *args, **kw):
origdir = os.path.abspath('.')
try:
return f(*args, **kw)
finally:
os.chdir(origdir)
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