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comparison mercurial/ui.py @ 36794:fa53a1d1f16e

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ui: do not try readline support if fin/fout aren't standard streams It's unlikely for a non-stdio stream to be a tty. Minimizing readline support makes it much simpler to work around the unicode input() function of Python 3. This also works on chg which duplicates client's tty to stdio fds.
author Yuya Nishihara <yuya@tcha.org>
date Tue, 06 Mar 2018 02:32:26 -0600
parents 30742c216abb
children 9b513888ea23
comparison
equal deleted inserted replaced
36793:eca1051e6c22 36794:fa53a1d1f16e
1262 return self._isatty(self.fout) 1262 return self._isatty(self.fout)
1263 1263
1264 return i 1264 return i
1265 1265
1266 def _readline(self): 1266 def _readline(self):
1267 if self._isatty(self.fin): 1267 usereadline = (self._isatty(self.fin) and self._isatty(self.fout)
1268 and util.isstdin(self.fin) and util.isstdout(self.fout))
1269 if usereadline:
1268 try: 1270 try:
1269 # magically add command line editing support, where 1271 # magically add command line editing support, where
1270 # available 1272 # available
1271 import readline 1273 import readline
1272 # force demandimport to really load the module 1274 # force demandimport to really load the module
1273 readline.read_history_file 1275 readline.read_history_file
1274 # windows sometimes raises something other than ImportError 1276 # windows sometimes raises something other than ImportError
1275 except Exception: 1277 except Exception:
1276 pass 1278 usereadline = False
1277 1279
1278 # prompt ' ' must exist; otherwise readline may delete entire line 1280 # prompt ' ' must exist; otherwise readline may delete entire line
1279 # - http://bugs.python.org/issue12833 1281 # - http://bugs.python.org/issue12833
1280 with self.timeblockedsection('stdio'): 1282 with self.timeblockedsection('stdio'):
1281 sin, sout = sys.stdin, sys.stdout 1283 sin, sout = sys.stdin, sys.stdout