在我的python-click-CLI脚本中,我正在为一些功能创建一些命令,这些功能对于用户不应该看到(以免混淆),但对于例如开发人员。
是否可以对Python单击命令使用功能标志?
我想能够配置(通过配置文件等)命令是否可用。如果禁用了命令功能,则该命令不可调用,并且帮助中不应显示该命令。
赞:
FLAG_ENABLED = False
# This command should not be shown and not be callable as long as the flag is disabled
@cli.command(name='specialfeature', active=FLAG_ENABLED)
def special_feature_command()
....
很明显,我可以更改函数的主体:
@cli.command(name='specialfeature', active=FLAG_ENABLED)
def special_feature_command()
if FLAG_ENABLED:
...
else:
...
但是我的命令仍然会显示在帮助中,我想避免。
答案 0 :(得分:1)
您可以使用以下自定义类添加功能标记功能:
该类超越了click.Group.command()
方法,该方法用于装饰命令功能。它增加了传递active
标志的功能,该标志在False
时将跳过将命令添加到组的操作。
import click
class FeatureFlagCommand(click.Group):
def command(self, *args, active=True, **kwargs):
"""Behaves the same as `click.Group.command()` except added an
`active` flag which can be used to disable to command.
"""
if active:
return super(FeatureFlagCommand, self).command(*args, **kwargs)
else:
return lambda f: f
通过将cls
参数传递给click.group()
装饰器,通过group.command()
添加到组中的任何命令都将带有active
标志。
@click.group(cls=FeatureFlagCommand)
def cli():
...
@cli.command(name='specialfeature', active=FLAG_ENABLED)
def special_feature_command()
...
之所以可行,是因为click是一个设计良好的OO框架。从click.Group
继承并构建新的command()
装饰器很容易。在新的command()
装饰器中,如果活动标志为False
,我们将返回未修饰的函数,而不是将该函数添加到组中。
@click.group(cls=FeatureFlagCommand)
def cli():
"""My Awesome Click Program"""
@cli.command(active=False)
def command1():
click.echo('Command 1')
@cli.command(active=True)
def command2():
click.echo('Command 2')
@cli.command()
def command3():
click.echo('Command 3')
if __name__ == "__main__":
commands = (
'command1',
'command2',
'command3',
'--help',
'',
)
import sys, time
time.sleep(1)
print('Click Version: {}'.format(click.__version__))
print('Python Version: {}'.format(sys.version))
for cmd in commands:
try:
time.sleep(0.1)
print('-----------')
print('> ' + cmd)
time.sleep(0.1)
cli(cmd.split())
except BaseException as exc:
if str(exc) != '0' and \
not isinstance(exc, (click.ClickException, SystemExit)):
raise
Click Version: 6.7
Python Version: 3.6.3 (v3.6.3:2c5fed8, Oct 3 2017, 18:11:49) [MSC v.1900 64 bit (AMD64)]
-----------
> command1
Usage: test.py [OPTIONS] COMMAND [ARGS]...
Error: No such command "command1".
-----------
> command2
Command 2
-----------
> command3
Command 3
-----------
> --help
Usage: test.py [OPTIONS] COMMAND [ARGS]...
My Awesome Click Program
Options:
--help Show this message and exit.
Commands:
command2
command3
-----------
>
Usage: test.py [OPTIONS] COMMAND [ARGS]...
My Awesome Click Program
Options:
--help Show this message and exit.
Commands:
command2
command3