comparison mercurial/ui.py @ 14614:afccc64eea73

ui: use I/O descriptors internally

and as a result:
- fix webproto to redirect the ui descriptors instead of sys.stdout/err
- fix sshserver to use the ui descriptors

14613:ea8938d3a5aa

        '''
        if self._buffers:
            self._buffers[-1].extend([str(a) for a in args])
        else:
            for a in args:
                sys.stdout.write(str(a))

    def write_err(self, *args, **opts):
        try:
            if not getattr(sys.stdout, 'closed', False):
                sys.stdout.flush()
            for a in args:
                sys.stderr.write(str(a))
            # stderr may be buffered under win32 when redirected to files,
            # including stdout.
            if not getattr(sys.stderr, 'closed', False):
                sys.stderr.flush()
        except IOError, inst:
            if inst.errno not in (errno.EPIPE, errno.EIO):
                raise

    def flush(self):
        try: sys.stdout.flush()
        except: pass
        try: sys.stderr.flush()
        except: pass

    def interactive(self):
        '''is interactive input allowed?

        '''
        i = self.configbool("ui", "interactive", None)
        if i is None:
            # some environments replace stdin without implementing isatty
            # usually those are non-interactive
            return util.isatty(sys.stdin)

        return i

    def termwidth(self):
        '''how wide is the terminal in columns?

        i = self.configbool("ui", "formatted", None)
        if i is None:
            # some environments replace stdout without implementing isatty
            # usually those are non-interactive
            return util.isatty(sys.stdout)

        return i

    def _readline(self, prompt=''):
        if util.isatty(sys.stdin):
            try:
                # magically add command line editing support, where
                # available
                import readline
                # force demandimport to really load the module
                readline.read_history_file
                # windows sometimes raises something other than ImportError
            except Exception:
                pass
        line = raw_input(prompt)
        # When stdin is in binary mode on Windows, it can cause
        # raw_input() to emit an extra trailing carriage return
        if os.linesep == '\r\n' and line and line[-1] == '\r':
            line = line[:-1]
        return line

14614:afccc64eea73

        '''
        if self._buffers:
            self._buffers[-1].extend([str(a) for a in args])
        else:
            for a in args:
                self.fout.write(str(a))

    def write_err(self, *args, **opts):
        try:
            if not getattr(self.fout, 'closed', False):
                self.fout.flush()
            for a in args:
                self.ferr.write(str(a))
            # stderr may be buffered under win32 when redirected to files,
            # including stdout.
            if not getattr(self.ferr, 'closed', False):
                self.ferr.flush()
        except IOError, inst:
            if inst.errno not in (errno.EPIPE, errno.EIO):
                raise

    def flush(self):
        try: self.fout.flush()
        except: pass
        try: self.ferr.flush()
        except: pass

    def interactive(self):
        '''is interactive input allowed?

        '''
        i = self.configbool("ui", "interactive", None)
        if i is None:
            # some environments replace stdin without implementing isatty
            # usually those are non-interactive
            return util.isatty(self.fin)

        return i

    def termwidth(self):
        '''how wide is the terminal in columns?

        i = self.configbool("ui", "formatted", None)
        if i is None:
            # some environments replace stdout without implementing isatty
            # usually those are non-interactive
            return util.isatty(self.fout)

        return i

    def _readline(self, prompt=''):
        if util.isatty(self.fin):
            try:
                # magically add command line editing support, where
                # available
                import readline
                # force demandimport to really load the module
                readline.read_history_file
                # windows sometimes raises something other than ImportError
            except Exception:
                pass

        # instead of trying to emulate raw_input, swap our in/out
        # with sys.stdin/out
        old = sys.stdout, sys.stdin
        sys.stdout, sys.stdin = self.fout, self.fin
        line = raw_input(prompt)
        sys.stdout, sys.stdin = old

        # When stdin is in binary mode on Windows, it can cause
        # raw_input() to emit an extra trailing carriage return
        if os.linesep == '\r\n' and line and line[-1] == '\r':
            line = line[:-1]
        return line