53 lines
1.5 KiB
Python
53 lines
1.5 KiB
Python
import click
|
|
|
|
try:
|
|
from urllib import parse as urlparse
|
|
except ImportError:
|
|
import urlparse
|
|
|
|
|
|
def validate_count(ctx, param, value):
|
|
if value < 0 or value % 2 != 0:
|
|
raise click.BadParameter("Should be a positive, even integer.")
|
|
return value
|
|
|
|
|
|
class URL(click.ParamType):
|
|
name = "url"
|
|
|
|
def convert(self, value, param, ctx):
|
|
if not isinstance(value, tuple):
|
|
value = urlparse.urlparse(value)
|
|
if value.scheme not in ("http", "https"):
|
|
self.fail(
|
|
"invalid URL scheme ({}). Only HTTP URLs are"
|
|
" allowed".format(value.scheme),
|
|
param,
|
|
ctx,
|
|
)
|
|
return value
|
|
|
|
|
|
@click.command()
|
|
@click.option(
|
|
"--count", default=2, callback=validate_count, help="A positive even number."
|
|
)
|
|
@click.option("--foo", help="A mysterious parameter.")
|
|
@click.option("--url", help="A URL", type=URL())
|
|
@click.version_option()
|
|
def cli(count, foo, url):
|
|
"""Validation.
|
|
|
|
This example validates parameters in different ways. It does it
|
|
through callbacks, through a custom type as well as by validating
|
|
manually in the function.
|
|
"""
|
|
if foo is not None and foo != "wat":
|
|
raise click.BadParameter(
|
|
'If a value is provided it needs to be the value "wat".',
|
|
param_hint=["--foo"],
|
|
)
|
|
click.echo("count: {}".format(count))
|
|
click.echo("foo: {}".format(foo))
|
|
click.echo("url: {!r}".format(url))
|