dotnet install fails for prefixed packages

[rkm]

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dotnet tool

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A bit of an oversight when constructing tool_name here:

pre-commit/pre_commit/languages/dotnet.py

Lines 60 to 63 in cb0bcfd

	# Determine tool from the packaged file <tool_name>.<version>.nupkg
	build_outputs = os.listdir(os.path.join(prefix.prefix_dir, build_dir))
	for output in build_outputs:
	tool_name = output.split('.')[0]

E.g.

$ pre-commit try-repo https://github.com/rkm/sample-dotnet-tool
[INFO] Initializing environment for https://github.com/rkm/sample-dotnet-tool.
===============================================================================
Using config:
===============================================================================
repos:
-   repo: https://github.com/rkm/sample-dotnet-tool
    rev: e53a3601bc06bb038dac30da813572291dd8d58f
    hooks:
    -   id: sample-dotnet-tool
===============================================================================
[INFO] Installing environment for https://github.com/rkm/sample-dotnet-tool.
[INFO] Once installed this environment will be reused.
[INFO] This may take a few minutes...
An unexpected error has occurred: CalledProcessError: command: ('/home/rkm/bin/dotnet', 'tool', 'install', '--tool-path', '/tmp/tmp6bk4v26x/repotefhurdg/dotnetenv-default/bin', '--add-source', 'pre-commit-build', 'Rkm')
return code: 1
expected return code: 0
stdout:
    /tmp/1873db78-d0a7-48ba-bbff-10a7ef85a2a6/restore.csproj : error NU1101: Unable to find package rkm. No packages exist with this id in source(s): /tmp/tmp6bk4v26x/repotefhurdg/pre-commit-build, nuget.org

stderr:
    The tool package could not be restored.
    Tool 'rkm' failed to install. This failure may have been caused by:

    * You are attempting to install a preview release and did not use the --version option to specify the version.
    * A package by this name was found, but it was not a .NET tool.
    * The required NuGet feed cannot be accessed, perhaps because of an Internet connection problem.
    * You mistyped the name of the tool.

    For more reasons, including package naming enforcement, visit https://aka.ms/failure-installing-tool

Check the log at /home/rkm/.cache/pre-commit/pre-commit.log

pre-commit --version

pre-commit 2.20.0

.pre-commit-config.yaml

repos:
-   repo: https://github.com/rkm/sample-dotnet-tool
    rev: e53a3601bc06bb038dac30da813572291dd8d58f
    hooks:
    -   id: sample-dotnet-tool

~/.cache/pre-commit/pre-commit.log (if present)

No response