Option, OptionValueError, SUPPRESS_HELP)
__all__ = ["DEBUG_OPT", "NOHDR_OPT", "SEP_OPT", "GenericMain", "SubmitOpCode",
- "cli_option", "GenerateTable",
+ "cli_option", "GenerateTable", "AskUser",
"ARGS_NONE", "ARGS_FIXED", "ARGS_ATLEAST", "ARGS_ANY", "ARGS_ONE",
"USEUNITS_OPT", "FIELDS_OPT", "FORCE_OPT"]
return func, options, args
-def _AskUser(text):
- """Ask the user a yes/no question.
+def AskUser(text, choices=None):
+ """Ask the user a question.
Args:
- questionstring - the question to ask.
+ text - the question to ask.
- Returns:
- True or False depending on answer (No for False is default).
+ choices - list with elements tuples (input_char, return_value,
+ description); if not given, it will default to: [('y', True,
+ 'Perform the operation'), ('n', False, 'Do no do the operation')];
+ note that the '?' char is reserved for help
+
+ Returns: one of the return values from the choices list; if input is
+ not possible (i.e. not running with a tty, we return the last entry
+ from the list
"""
+ if choices is None:
+ choices = [('y', True, 'Perform the operation'),
+ ('n', False, 'Do not perform the operation')]
+ if not choices or not isinstance(choices, list):
+ raise errors.ProgrammerError("Invalid choiches argument to AskUser")
+ for entry in choices:
+ if not isinstance(entry, tuple) or len(entry) < 3 or entry[0] == '?':
+ raise errors.ProgrammerError("Invalid choiches element to AskUser")
+
+ answer = choices[-1][1]
+ new_text = []
+ for line in text.splitlines():
+ new_text.append(textwrap.fill(line, 70, replace_whitespace=False))
+ text = "\n".join(new_text)
try:
f = file("/dev/tty", "r+")
except IOError:
- return False
- answer = False
+ return answer
try:
- f.write(textwrap.fill(text))
- f.write('\n')
- f.write("y/[n]: ")
- line = f.readline(16).strip().lower()
- answer = line in ('y', 'yes')
+ chars = [entry[0] for entry in choices]
+ chars[-1] = "[%s]" % chars[-1]
+ chars.append('?')
+ maps = dict([(entry[0], entry[1]) for entry in choices])
+ while True:
+ f.write(text)
+ f.write('\n')
+ f.write("/".join(chars))
+ f.write(": ")
+ line = f.readline(2).strip().lower()
+ if line in maps:
+ answer = maps[line]
+ break
+ elif line == '?':
+ for entry in choices:
+ f.write(" %s - %s\n" % (entry[0], entry[2]))
+ f.write("\n")
+ continue
finally:
f.close()
return answer
if func is None: # parse error
return 1
- options._ask_user = _AskUser
-
logger.SetupLogging(debug=options.debug, program=binary)
try:
if not opts.force:
usertext = ("This will reinstall the instance %s and remove "
"all data. Continue?") % instance_name
- if not opts._ask_user(usertext):
+ if not AskUser(usertext):
return 1
op = opcodes.OpReinstallInstance(instance_name=instance_name,
usertext = ("This will remove the volumes of the instance %s"
" (including mirrors), thus removing all the data"
" of the instance. Continue?") % instance_name
- if not opts._ask_user(usertext):
+ if not AskUser(usertext):
return 1
op = opcodes.OpRemoveInstance(instance_name=instance_name)
usertext = ("Failover will happen to image %s."
" This requires a shutdown of the instance. Continue?" %
(instance_name,))
- if not opts._ask_user(usertext):
+ if not AskUser(usertext):
return 1
op = opcodes.OpFailoverInstance(instance_name=instance_name,