2b095f720e
Using
```Python
with suppress(OSError):
os.remove('somefile.tmp')
```
instead of
```Python
try:
os.remove('somefile.tmp')
except OSError:
pass
```
makes the code more compact and more readable IMO.
This pattern was recommended by Raymond Hettinger, a Python Core
Developer in his talk "Transforming Code into Beautiful, Idiomatic Python" at https://www.youtube.com/watch?v=OSGv2VnC0go. The transcript is available at https://github.com/JeffPaine/beautiful_idiomatic_python
122 lines
3.1 KiB
Python
122 lines
3.1 KiB
Python
#!/usr/bin/env python3
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# vim:fileencoding=utf-8
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# License: GPL v3 Copyright: 2018, Kovid Goyal <kovid at kovidgoyal.net>
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import os
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from contextlib import suppress
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from kitty.cli import parse_args
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from kitty.constants import cache_dir
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from ..tui.operations import alternate_screen, styled
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readline = None
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def get_history_items():
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return list(map(readline.get_history_item, range(1, readline.get_current_history_length() + 1)))
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def sort_key(item):
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return len(item), item.lower()
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class HistoryCompleter:
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def __init__(self, name=None):
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self.matches = []
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self.history_path = None
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if name:
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ddir = os.path.join(cache_dir(), 'ask')
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with suppress(FileExistsError):
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os.makedirs(ddir)
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self.history_path = os.path.join(ddir, name)
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def complete(self, text, state):
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response = None
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if state == 0:
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history_values = get_history_items()
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if text:
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self.matches = sorted(
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(h for h in history_values if h and h.startswith(text)), key=sort_key)
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else:
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self.matches = []
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try:
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response = self.matches[state]
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except IndexError:
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response = None
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return response
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def __enter__(self):
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if self.history_path:
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with suppress(Exception):
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readline.read_history_file(self.history_path)
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readline.set_completer(self.complete)
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return self
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def __exit__(self, *a):
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if self.history_path:
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readline.write_history_file(self.history_path)
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def option_text():
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return '''\
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--type -t
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choices=line
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default=line
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Type of input. Defaults to asking for a line of text.
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--message -m
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The message to display to the user. If not specified a default
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message is shown.
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--name -n
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The name for this question. Used to store history of previous answers which can
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be used for completions and via the browse history readline bindings.
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'''
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def main(args):
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# For some reason importing readline in a key handler in the main kitty process
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# causes a crash of the python interpreter, probably because of some global
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# lock
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global readline
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import readline as rl
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readline = rl
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from kitty.shell import init_readline
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msg = 'Ask the user for input'
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try:
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args, items = parse_args(args[1:], option_text, '', msg, 'kitty ask')
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except SystemExit as e:
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if e.code != 0:
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print(e.args[0])
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input('Press enter to quit...')
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raise SystemExit(e.code)
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init_readline(readline)
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ans = {'items': items}
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with alternate_screen(), HistoryCompleter(args.name):
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if args.message:
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print(styled(args.message, bold=True))
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prompt = '> '
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with suppress(KeyboardInterrupt, EOFError):
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ans['response'] = input(prompt)
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return ans
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def handle_result(args, data, target_window_id, boss):
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if 'response' in data:
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func, *args = data['items']
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getattr(boss, func)(data['response'], *args)
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if __name__ == '__main__':
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import sys
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ans = main(sys.argv)
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if ans:
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print(ans)
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