Cannot invoke task with underscore in method name

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Assessment

Difficulty
3/5
Estimated time
1-2 days
Newbie friendliness
65/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Quiet
Tech stack
python
Domain
cli

Research direction

Start by reproducing the behavior with the example tasks.py and compare invoke showhelp with invoke show_help. Trace how task names are discovered and matched by the invoke command; done when underscored task names invoke successfully without changing the existing behavior for names without underscores.

Written by the indexing model from the issue text.

Description

Version: 2.2.1

Use Case

Using the example tasks.py...

from invoke.tasks import task


@task
def show_help(c):
    """Show available tasks."""
    print("Available tasks:")
    
@task
def showhelp(c):
    """Show available tasks."""
    print("Available tasks:")

Calling showhelp...

invoke showhelp

prints

Available tasks:

however, calling 'show_help`...

invoke show_help

results in

No idea what 'show_help' is!
Dominant language
Python
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  4. Open a pull request that references the issue number.

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