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# Licensed to the StackStorm, Inc ('StackStorm') under one or more |
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# contributor license agreements. See the NOTICE file distributed with |
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# this work for additional information regarding copyright ownership. |
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# The ASF licenses this file to You under the Apache License, Version 2.0 |
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# (the "License"); you may not use this file except in compliance with |
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# the License. You may obtain a copy of the License at |
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# |
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# http://www.apache.org/licenses/LICENSE-2.0 |
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# |
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# Unless required by applicable law or agreed to in writing, software |
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# distributed under the License is distributed on an "AS IS" BASIS, |
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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# See the License for the specific language governing permissions and |
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# limitations under the License. |
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import os |
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import struct |
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import subprocess |
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import sys |
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from st2client.utils.color import format_status |
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__all__ = [ |
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'get_terminal_size' |
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] |
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def get_terminal_size(default=(80, 20)): |
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""" |
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:return: (lines, cols) |
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""" |
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def ioctl_GWINSZ(fd): |
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import fcntl |
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import termios |
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return struct.unpack('hh', fcntl.ioctl(fd, termios.TIOCGWINSZ, '1234')) |
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# try stdin, stdout, stderr |
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for fd in (0, 1, 2): |
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try: |
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return ioctl_GWINSZ(fd) |
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except: |
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pass |
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# try os.ctermid() |
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try: |
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fd = os.open(os.ctermid(), os.O_RDONLY) |
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try: |
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return ioctl_GWINSZ(fd) |
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finally: |
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os.close(fd) |
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except: |
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pass |
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# try `stty size` |
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try: |
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process = subprocess.Popen(['stty', 'size'], |
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shell=False, |
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stdout=subprocess.PIPE, |
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stderr=open(os.devnull, 'w')) |
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result = process.communicate() |
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if process.returncode == 0: |
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return tuple(int(x) for x in result[0].split()) |
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except: |
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pass |
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# try environment variables |
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try: |
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return tuple(int(os.getenv(var)) for var in ('LINES', 'COLUMNS')) |
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except: |
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pass |
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# return default. |
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return default |
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class TaskIndicator(object): |
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def __enter__(self): |
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return self |
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def __exit__(self, type, value, traceback): |
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return self.close() |
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def add_stage(self, status, name): |
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self._write('\t[{:^20}] {}'.format(format_status(status), name)) |
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def update_stage(self, status, name): |
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self._write('\t[{:^20}] {}'.format(format_status(status), name), override=True) |
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def finish_stage(self, status, name): |
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self._write('\t[{:^20}] {}'.format(format_status(status), name), override=True) |
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def close(self): |
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self._write('\n') |
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def _write(self, string, override=False): |
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if override: |
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sys.stdout.write('\r') |
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else: |
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sys.stdout.write('\n') |
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sys.stdout.write(string) |
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sys.stdout.flush() |
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StackStorm /
st2
It is generally discouraged to redefine built-ins as this makes code very hard to read.