mirror of
https://github.com/thegeeklab/ansible-later.git
synced 2024-11-26 23:00:36 +00:00
290 lines
10 KiB
Python
290 lines
10 KiB
Python
|
# Copyright 2012, Tim Bielawa <tbielawa@redhat.com>
|
||
|
|
#
|
||
|
|
# This file is part of Ansible
|
||
|
|
#
|
||
|
|
# Ansible is free software: you can redistribute it and/or modify
|
||
|
|
# it under the terms of the GNU General Public License as published by
|
||
|
|
# the Free Software Foundation, either version 3 of the License, or
|
||
|
|
# (at your option) any later version.
|
||
|
|
#
|
||
|
|
# Ansible is distributed in the hope that it will be useful,
|
||
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
# GNU General Public License for more details.
|
||
|
|
#
|
||
|
|
# You should have received a copy of the GNU General Public License
|
||
|
|
# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
|
||
|
|
from __future__ import (absolute_import, division, print_function)
|
||
|
|
__metaclass__ = type
|
||
|
|
|
||
|
|
import datetime
|
||
|
|
import signal
|
||
|
|
import sys
|
||
|
|
import termios
|
||
|
|
import time
|
||
|
|
import tty
|
||
|
|
|
||
|
|
from os import isatty
|
||
|
|
from ansible.errors import AnsibleError
|
||
|
|
from ansible.module_utils._text import to_text, to_native
|
||
|
|
from ansible.module_utils.parsing.convert_bool import boolean
|
||
|
|
from ansible.module_utils.six import PY3
|
||
|
|
from ansible.plugins.action import ActionBase
|
||
|
|
|
||
|
|
try:
|
||
|
|
from __main__ import display
|
||
|
|
except ImportError:
|
||
|
|
from ansible.utils.display import Display
|
||
|
|
display = Display()
|
||
|
|
|
||
|
|
try:
|
||
|
|
import curses
|
||
|
|
|
||
|
|
# Nest the try except since curses.error is not available if curses did not import
|
||
|
|
try:
|
||
|
|
curses.setupterm()
|
||
|
|
HAS_CURSES = True
|
||
|
|
except curses.error:
|
||
|
|
HAS_CURSES = False
|
||
|
|
except ImportError:
|
||
|
|
HAS_CURSES = False
|
||
|
|
|
||
|
|
if HAS_CURSES:
|
||
|
|
MOVE_TO_BOL = curses.tigetstr('cr')
|
||
|
|
CLEAR_TO_EOL = curses.tigetstr('el')
|
||
|
|
else:
|
||
|
|
MOVE_TO_BOL = b'\r'
|
||
|
|
CLEAR_TO_EOL = b'\x1b[K'
|
||
|
|
|
||
|
|
|
||
|
|
class AnsibleTimeoutExceeded(Exception):
|
||
|
|
pass
|
||
|
|
|
||
|
|
|
||
|
|
def timeout_handler(signum, frame):
|
||
|
|
raise AnsibleTimeoutExceeded
|
||
|
|
|
||
|
|
|
||
|
|
def clear_line(stdout):
|
||
|
|
stdout.write(b'\x1b[%s' % MOVE_TO_BOL)
|
||
|
|
stdout.write(b'\x1b[%s' % CLEAR_TO_EOL)
|
||
|
|
|
||
|
|
|
||
|
|
class ActionModule(ActionBase):
|
||
|
|
''' pauses execution for a length or time, or until input is received '''
|
||
|
|
|
||
|
|
BYPASS_HOST_LOOP = True
|
||
|
|
_VALID_ARGS = frozenset(('echo', 'minutes', 'prompt', 'seconds'))
|
||
|
|
|
||
|
|
def run(self, tmp=None, task_vars=None):
|
||
|
|
''' run the pause action module '''
|
||
|
|
if task_vars is None:
|
||
|
|
task_vars = dict()
|
||
|
|
|
||
|
|
result = super(ActionModule, self).run(tmp, task_vars)
|
||
|
|
del tmp # tmp no longer has any effect
|
||
|
|
|
||
|
|
duration_unit = 'minutes'
|
||
|
|
prompt = None
|
||
|
|
seconds = None
|
||
|
|
echo = True
|
||
|
|
echo_prompt = ''
|
||
|
|
result.update(dict(
|
||
|
|
changed=False,
|
||
|
|
rc=0,
|
||
|
|
stderr='',
|
||
|
|
stdout='',
|
||
|
|
start=None,
|
||
|
|
stop=None,
|
||
|
|
delta=None,
|
||
|
|
echo=echo
|
||
|
|
))
|
||
|
|
|
||
|
|
# Should keystrokes be echoed to stdout?
|
||
|
|
if 'echo' in self._task.args:
|
||
|
|
try:
|
||
|
|
echo = boolean(self._task.args['echo'])
|
||
|
|
except TypeError as e:
|
||
|
|
result['failed'] = True
|
||
|
|
result['msg'] = to_native(e)
|
||
|
|
return result
|
||
|
|
|
||
|
|
# Add a note saying the output is hidden if echo is disabled
|
||
|
|
if not echo:
|
||
|
|
echo_prompt = ' (output is hidden)'
|
||
|
|
|
||
|
|
# Is 'prompt' a key in 'args'?
|
||
|
|
if 'prompt' in self._task.args:
|
||
|
|
prompt = "[%s]\n%s%s:" % (self._task.get_name().strip(), self._task.args['prompt'], echo_prompt)
|
||
|
|
else:
|
||
|
|
# If no custom prompt is specified, set a default prompt
|
||
|
|
prompt = "[%s]\n%s%s:" % (self._task.get_name().strip(), 'Press enter to continue, Ctrl+C to interrupt', echo_prompt)
|
||
|
|
|
||
|
|
# Are 'minutes' or 'seconds' keys that exist in 'args'?
|
||
|
|
if 'minutes' in self._task.args or 'seconds' in self._task.args:
|
||
|
|
try:
|
||
|
|
if 'minutes' in self._task.args:
|
||
|
|
# The time() command operates in seconds so we need to
|
||
|
|
# recalculate for minutes=X values.
|
||
|
|
seconds = int(self._task.args['minutes']) * 60
|
||
|
|
else:
|
||
|
|
seconds = int(self._task.args['seconds'])
|
||
|
|
duration_unit = 'seconds'
|
||
|
|
|
||
|
|
except ValueError as e:
|
||
|
|
result['failed'] = True
|
||
|
|
result['msg'] = u"non-integer value given for prompt duration:\n%s" % to_text(e)
|
||
|
|
return result
|
||
|
|
|
||
|
|
########################################################################
|
||
|
|
# Begin the hard work!
|
||
|
|
|
||
|
|
start = time.time()
|
||
|
|
result['start'] = to_text(datetime.datetime.now())
|
||
|
|
result['user_input'] = b''
|
||
|
|
|
||
|
|
stdin_fd = None
|
||
|
|
old_settings = None
|
||
|
|
try:
|
||
|
|
if seconds is not None:
|
||
|
|
if seconds < 1:
|
||
|
|
seconds = 1
|
||
|
|
|
||
|
|
# setup the alarm handler
|
||
|
|
signal.signal(signal.SIGALRM, timeout_handler)
|
||
|
|
signal.alarm(seconds)
|
||
|
|
|
||
|
|
# show the timer and control prompts
|
||
|
|
display.display("Pausing for %d seconds%s" % (seconds, echo_prompt))
|
||
|
|
display.display("(ctrl+C then 'C' = continue early, ctrl+C then 'A' = abort)\r"),
|
||
|
|
|
||
|
|
# show the prompt specified in the task
|
||
|
|
if 'prompt' in self._task.args:
|
||
|
|
display.display(prompt)
|
||
|
|
|
||
|
|
else:
|
||
|
|
display.display(prompt)
|
||
|
|
|
||
|
|
# save the attributes on the existing (duped) stdin so
|
||
|
|
# that we can restore them later after we set raw mode
|
||
|
|
stdin_fd = None
|
||
|
|
stdout_fd = None
|
||
|
|
try:
|
||
|
|
if PY3:
|
||
|
|
stdin = self._connection._new_stdin.buffer
|
||
|
|
stdout = sys.stdout.buffer
|
||
|
|
else:
|
||
|
|
stdin = self._connection._new_stdin
|
||
|
|
stdout = sys.stdout
|
||
|
|
stdin_fd = stdin.fileno()
|
||
|
|
stdout_fd = stdout.fileno()
|
||
|
|
except (ValueError, AttributeError):
|
||
|
|
# ValueError: someone is using a closed file descriptor as stdin
|
||
|
|
# AttributeError: someone is using a null file descriptor as stdin on windoez
|
||
|
|
stdin = None
|
||
|
|
|
||
|
|
if stdin_fd is not None:
|
||
|
|
if isatty(stdin_fd):
|
||
|
|
# grab actual Ctrl+C sequence
|
||
|
|
try:
|
||
|
|
intr = termios.tcgetattr(stdin_fd)[6][termios.VINTR]
|
||
|
|
except Exception:
|
||
|
|
# unsupported/not present, use default
|
||
|
|
intr = b'\x03' # value for Ctrl+C
|
||
|
|
|
||
|
|
# get backspace sequences
|
||
|
|
try:
|
||
|
|
backspace = termios.tcgetattr(stdin_fd)[6][termios.VERASE]
|
||
|
|
except Exception:
|
||
|
|
backspace = [b'\x7f', b'\x08']
|
||
|
|
|
||
|
|
old_settings = termios.tcgetattr(stdin_fd)
|
||
|
|
tty.setraw(stdin_fd)
|
||
|
|
|
||
|
|
# Only set stdout to raw mode if it is a TTY. This is needed when redirecting
|
||
|
|
# stdout to a file since a file cannot be set to raw mode.
|
||
|
|
if isatty(stdout_fd):
|
||
|
|
tty.setraw(stdout_fd)
|
||
|
|
|
||
|
|
# Only echo input if no timeout is specified
|
||
|
|
if not seconds and echo:
|
||
|
|
new_settings = termios.tcgetattr(stdin_fd)
|
||
|
|
new_settings[3] = new_settings[3] | termios.ECHO
|
||
|
|
termios.tcsetattr(stdin_fd, termios.TCSANOW, new_settings)
|
||
|
|
|
||
|
|
# flush the buffer to make sure no previous key presses
|
||
|
|
# are read in below
|
||
|
|
termios.tcflush(stdin, termios.TCIFLUSH)
|
||
|
|
|
||
|
|
while True:
|
||
|
|
|
||
|
|
try:
|
||
|
|
if stdin_fd is not None:
|
||
|
|
|
||
|
|
key_pressed = stdin.read(1)
|
||
|
|
|
||
|
|
if key_pressed == intr: # value for Ctrl+C
|
||
|
|
clear_line(stdout)
|
||
|
|
raise KeyboardInterrupt
|
||
|
|
|
||
|
|
if not seconds:
|
||
|
|
if stdin_fd is None or not isatty(stdin_fd):
|
||
|
|
display.warning("Not waiting for response to prompt as stdin is not interactive")
|
||
|
|
break
|
||
|
|
|
||
|
|
# read key presses and act accordingly
|
||
|
|
if key_pressed in (b'\r', b'\n'):
|
||
|
|
clear_line(stdout)
|
||
|
|
break
|
||
|
|
elif key_pressed in backspace:
|
||
|
|
# delete a character if backspace is pressed
|
||
|
|
result['user_input'] = result['user_input'][:-1]
|
||
|
|
clear_line(stdout)
|
||
|
|
if echo:
|
||
|
|
stdout.write(result['user_input'])
|
||
|
|
stdout.flush()
|
||
|
|
else:
|
||
|
|
result['user_input'] += key_pressed
|
||
|
|
|
||
|
|
except KeyboardInterrupt:
|
||
|
|
signal.alarm(0)
|
||
|
|
display.display("Press 'C' to continue the play or 'A' to abort \r"),
|
||
|
|
if self._c_or_a(stdin):
|
||
|
|
clear_line(stdout)
|
||
|
|
break
|
||
|
|
|
||
|
|
clear_line(stdout)
|
||
|
|
|
||
|
|
raise AnsibleError('user requested abort!')
|
||
|
|
|
||
|
|
except AnsibleTimeoutExceeded:
|
||
|
|
# this is the exception we expect when the alarm signal
|
||
|
|
# fires, so we simply ignore it to move into the cleanup
|
||
|
|
pass
|
||
|
|
finally:
|
||
|
|
# cleanup and save some information
|
||
|
|
# restore the old settings for the duped stdin stdin_fd
|
||
|
|
if not(None in (stdin_fd, old_settings)) and isatty(stdin_fd):
|
||
|
|
termios.tcsetattr(stdin_fd, termios.TCSADRAIN, old_settings)
|
||
|
|
|
||
|
|
duration = time.time() - start
|
||
|
|
result['stop'] = to_text(datetime.datetime.now())
|
||
|
|
result['delta'] = int(duration)
|
||
|
|
|
||
|
|
if duration_unit == 'minutes':
|
||
|
|
duration = round(duration / 60.0, 2)
|
||
|
|
else:
|
||
|
|
duration = round(duration, 2)
|
||
|
|
result['stdout'] = "Paused for %s %s" % (duration, duration_unit)
|
||
|
|
|
||
|
|
result['user_input'] = to_text(result['user_input'], errors='surrogate_or_strict')
|
||
|
|
return result
|
||
|
|
|
||
|
|
def _c_or_a(self, stdin):
|
||
|
|
while True:
|
||
|
|
key_pressed = stdin.read(1)
|
||
|
|
if key_pressed.lower() == b'a':
|
||
|
|
return False
|
||
|
|
elif key_pressed.lower() == b'c':
|
||
|
|
return True
|