85 lines
2.3 KiB
Python
85 lines
2.3 KiB
Python
# Copyright (c) 2019 Red Hat, Inc.
|
|
#
|
|
# All Rights Reserved.
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License"); you may
|
|
# not use this file except in compliance with the License. You may obtain
|
|
# a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
# License for the specific language governing permissions and limitations
|
|
# under the License.
|
|
from __future__ import absolute_import
|
|
|
|
import shlex
|
|
import typing # noqa
|
|
|
|
|
|
class ShellCommand(tuple):
|
|
|
|
def __repr__(self):
|
|
return "ShellCommand([{!s}])".format(', '.join(self))
|
|
|
|
def __str__(self):
|
|
return list_to_command_line(self)
|
|
|
|
def __add__(self, other):
|
|
other = shell_command(other)
|
|
return shell_command(tuple(self) + other)
|
|
|
|
|
|
ShellCommandType = typing.Union[ShellCommand, str, typing.Iterable]
|
|
|
|
|
|
def shell_command(command: ShellCommandType) -> ShellCommand:
|
|
if isinstance(command, ShellCommand):
|
|
return command
|
|
elif isinstance(command, str):
|
|
return ShellCommand(shlex.split(command))
|
|
else:
|
|
return ShellCommand(str(a) for a in command)
|
|
|
|
|
|
def list_to_command_line(seq):
|
|
result = []
|
|
for arg in seq:
|
|
bs_buf = []
|
|
|
|
# Add a space to separate this argument from the others
|
|
if result:
|
|
result.append(' ')
|
|
|
|
needquote = (" " in arg) or ("\t" in arg) or not arg
|
|
if needquote:
|
|
result.append("'")
|
|
|
|
for c in arg:
|
|
if c == '\\':
|
|
# Don't know if we need to double yet.
|
|
bs_buf.append(c)
|
|
elif c == '"':
|
|
# Double backslashes.
|
|
result.append('\\' * len(bs_buf)*2)
|
|
bs_buf = []
|
|
result.append('\\"')
|
|
else:
|
|
# Normal char
|
|
if bs_buf:
|
|
result.extend(bs_buf)
|
|
bs_buf = []
|
|
result.append(c)
|
|
|
|
# Add remaining backslashes, if any.
|
|
if bs_buf:
|
|
result.extend(bs_buf)
|
|
|
|
if needquote:
|
|
result.extend(bs_buf)
|
|
result.append("'")
|
|
|
|
return ''.join(result)
|