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"""Utilities to call shell programs.""" |
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3
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import logging |
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import os |
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import subprocess |
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7
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from . import common |
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from .exceptions import ShellError |
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10
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1 |
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11
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CMD_PREFIX = "$ " |
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OUT_PREFIX = "> " |
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1 |
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log = logging.getLogger(__name__) |
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16
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1 |
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def call(name, *args, _show=True, _shell=False, _ignore=False): |
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"""Call a program with arguments. |
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:param name: name of program to call |
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:param args: list of command-line arguments |
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:param _show: display the call on stdout |
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:param _shell: force executing the program into a real shell |
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a Windows shell command (i.e: dir, echo) needs a real shell |
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but not a regular program (i.e: calc, git) |
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:param _ignore: ignore non-zero return codes |
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""" |
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program = show(name, *args, stdout=_show) |
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1 |
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command = subprocess.run( |
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name if _shell else [name, *args], |
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universal_newlines=True, |
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stdout=subprocess.PIPE, |
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stderr=subprocess.STDOUT, |
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shell=_shell, |
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36
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) |
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37
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1 |
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38
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output = [line.strip() for line in command.stdout.splitlines()] |
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for line in output: |
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log.debug(OUT_PREFIX + line) |
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if command.returncode == 0: |
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1 |
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return output |
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1 |
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if _ignore: |
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log.debug("Ignored error from call to '%s'", name) |
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1 |
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return output |
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48
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49
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message = ( |
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"An external program call failed." + "\n\n" |
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"In working directory: " + os.getcwd() + "\n\n" |
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"The following command produced a non-zero return code:" |
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+ "\n\n" |
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1 |
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+ CMD_PREFIX |
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+ program |
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+ "\n" |
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+ command.stdout.strip() |
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) |
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raise ShellError(message, program=program, output=output) |
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61
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62
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1 |
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def mkdir(path): |
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if not os.path.exists(path): |
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if os.name == 'nt': |
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call("mkdir " + path, _shell=True) |
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else: |
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call('mkdir', '-p', path) |
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68
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69
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1 |
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70
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1 |
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def cd(path, _show=True): |
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if os.name == 'nt': |
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show('cd', '/D', path, stdout=_show) |
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else: |
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show('cd', path, stdout=_show) |
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os.chdir(path) |
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77
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1 |
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78
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1 |
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def pwd(_show=True): |
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cwd = os.getcwd() |
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1 |
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if os.name == 'nt': |
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cwd = cwd.replace(os.sep, '/') |
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show('cwd', cwd, stdout=_show) |
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return cwd |
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84
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1 |
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85
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86
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def ln(source, target): |
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dirpath = os.path.dirname(target) |
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if not os.path.isdir(dirpath): |
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mkdir(dirpath) |
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os.symlink(source, target) |
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91
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92
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93
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def rm(path): |
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if os.name == 'nt': |
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if os.path.isfile(path): |
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call("del /Q /F " + path, _shell=True) |
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elif os.path.isdir(path): |
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call("rmdir /Q /S " + path, _shell=True) |
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else: |
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call('rm', '-rf', path) |
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102
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103
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def show(name, *args, stdout=True): |
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104
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program = ' '.join([name, *args]) |
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105
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if stdout: |
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106
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common.show(CMD_PREFIX + program, color='shell') |
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107
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else: |
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log.debug(CMD_PREFIX + program) |
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return program |
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110
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jacebrowning /
gitman
