22
22
Several levels are supported, and you can also register new factories such as
26
26
Semi-abstract base class
28
bzrlib.ui.SilentUIFactory
29
29
Produces no output and cannot take any input; useful for programs using
30
30
bzrlib in batch mode or for programs such as loggerhead.
32
bzrlib.ui.CannedInputUIFactory
33
33
For use in testing; the input values to be returned are provided
36
bzrlib.ui.text.TextUIFactory
37
37
Standard text command-line interface, with stdin, stdout, stderr.
38
38
May make more or less advanced use of them, eg in drawing progress bars,
39
39
depending on the detected capabilities of the terminal.
213
class CLIUIFactory(UIFactory):
214
"""Deprecated in favor of TextUIFactory."""
216
@deprecated_method(deprecated_in((1, 18, 0)))
217
def __init__(self, stdin=None, stdout=None, stderr=None):
218
UIFactory.__init__(self)
219
self.stdin = stdin or sys.stdin
220
self.stdout = stdout or sys.stdout
221
self.stderr = stderr or sys.stderr
223
_accepted_boolean_strings = dict(y=True, n=False, yes=True, no=False)
225
def get_boolean(self, prompt):
227
self.prompt(prompt + "? [y/n]: ")
228
line = self.stdin.readline()
229
line = line.rstrip('\n')
230
val = bool_from_string(line, self._accepted_boolean_strings)
234
def get_non_echoed_password(self):
235
isatty = getattr(self.stdin, 'isatty', None)
236
if isatty is not None and isatty():
237
# getpass() ensure the password is not echoed and other
238
# cross-platform niceties
239
password = getpass.getpass('')
241
# echo doesn't make sense without a terminal
242
password = self.stdin.readline()
245
elif password[-1] == '\n':
246
password = password[:-1]
249
def get_password(self, prompt='', **kwargs):
250
"""Prompt the user for a password.
252
:param prompt: The prompt to present the user
253
:param kwargs: Arguments which will be expanded into the prompt.
254
This lets front ends display different things if
256
:return: The password string, return None if the user
257
canceled the request.
260
self.prompt(prompt, **kwargs)
261
# There's currently no way to say 'i decline to enter a password'
262
# as opposed to 'my password is empty' -- does it matter?
263
return self.get_non_echoed_password()
265
def get_username(self, prompt, **kwargs):
266
"""Prompt the user for a username.
268
:param prompt: The prompt to present the user
269
:param kwargs: Arguments which will be expanded into the prompt.
270
This lets front ends display different things if
272
:return: The username string, return None if the user
273
canceled the request.
276
self.prompt(prompt, **kwargs)
277
username = self.stdin.readline()
280
elif username[-1] == '\n':
281
username = username[:-1]
284
def prompt(self, prompt, **kwargs):
285
"""Emit prompt on the CLI.
211
def show_error(self, msg):
212
"""Show an error message (not an exception) to the user.
287
:param kwargs: Dictionary of arguments to insert into the prompt,
288
to allow UIs to reformat the prompt.
214
The message should not have an error prefix or trailing newline. That
215
will be added by the factory if appropriate.
291
# See <https://launchpad.net/bugs/365891>
292
prompt = prompt % kwargs
293
prompt = prompt.encode(osutils.get_terminal_encoding(), 'replace')
295
self.stderr.write(prompt)
298
"""Write an already-formatted message."""
299
self.stdout.write(msg + '\n')
217
raise NotImplementedError(self.show_error)
219
def show_message(self, msg):
220
"""Show a message to the user."""
221
raise NotImplementedError(self.show_message)
223
def show_warning(self, msg):
224
"""Show a warning to the user."""
225
raise NotImplementedError(self.show_warning)
302
229
class SilentUIFactory(UIFactory):
added
removed
bzrlib/ui/__init__.py
