71 lines
2.3 KiB
Python
71 lines
2.3 KiB
Python
"""
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Copyright 2020 Oliver Smith
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This file is part of pmbootstrap.
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pmbootstrap is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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pmbootstrap is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with pmbootstrap. If not, see <http://www.gnu.org/licenses/>.
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"""
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import datetime
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import logging
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import re
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def ask(args, question="Continue?", choices=["y", "n"], default="n",
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lowercase_answer=True, validation_regex=None):
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"""
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Ask a question on the terminal. When validation_regex is set, the user gets
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asked until the answer matches the regex.
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:returns: the user's answer
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"""
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while True:
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date = datetime.datetime.now().strftime("%H:%M:%S")
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question_full = "[" + date + "] " + question
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if choices:
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question_full += " (" + str.join("/", choices) + ")"
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if default:
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question_full += " [" + str(default) + "]"
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ret = input(question_full + ": ")
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if lowercase_answer:
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ret = ret.lower()
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if ret == "":
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ret = str(default)
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args.logfd.write(question_full + " " + ret + "\n")
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args.logfd.flush()
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# Validate with regex
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if not validation_regex:
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return ret
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pattern = re.compile(validation_regex)
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if pattern.match(ret):
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return ret
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logging.fatal("ERROR: Input did not pass validation (regex: " +
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validation_regex + "). Please try again.")
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def confirm(args, question="Continue?", default=False):
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"""
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Convenience wrapper around ask for simple yes-no questions with validation.
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:returns: True for "y", False for "n"
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"""
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default_str = "y" if default else "n"
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if (args.assume_yes):
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logging.info(question + " (y/n) [" + default_str + "]: y")
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return True
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answer = ask(args, question, ["y", "n"], default_str, True, "(y|n)")
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return answer == "y"
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