32 lines
1.1 KiB
Python
32 lines
1.1 KiB
Python
# Copyright 2017 Canonical Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import apt
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from result import Err, Ok, Result
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def get_candidate_package_version(package_name: str) -> Result:
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"""
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Ask apt-cache for the new candidate package that is available
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:param package_name: The package to check for an upgrade
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:return: Ok with the new candidate version or Err in case the candidate
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was not found
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"""
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cache = apt.Cache()
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try:
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version = cache[package_name].candidate.version
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return Ok(version)
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except KeyError:
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return Err("Unable to find candidate upgrade package for: {}".format(
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package_name))
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