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40 lines
1.3 KiB
Python
40 lines
1.3 KiB
Python
#!/usr/bin/env python3
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# Copyright 2023 The Chromium Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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import os
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import re
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import sys
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from typing import Union
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_THIS_DIR = os.path.abspath(os.path.dirname(__file__))
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# The repo's root directory.
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_ROOT_DIR = os.path.abspath(os.path.join(_THIS_DIR, "..", "..", ".."))
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# Add the repo's root directory for clearer imports.
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sys.path.insert(0, _ROOT_DIR)
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import metadata.fields.types as field_types
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import metadata.fields.util as util
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import metadata.validation_result as vr
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_PATTERN_CPE_PREFIX = re.compile(r"^cpe:/.+:.+:.+(:.+)*$")
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class CPEPrefixField(field_types.MetadataField):
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"""Custom field for the package's CPE."""
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def __init__(self):
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super().__init__(name="CPEPrefix", one_liner=False)
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def validate(self, value: str) -> Union[vr.ValidationResult, None]:
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"""Checks the given value is either 'unknown', or a valid
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CPE in the URI form `cpe:/<part>:<vendor>:<product>[:<optional fields>]`.
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"""
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if util.is_unknown(value) or util.matches(_PATTERN_CPE_PREFIX, value):
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return None
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return vr.ValidationError(
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f"{self._name} is '{value}' - must be either 'unknown', or in the form "
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"'cpe:/<part>:<vendor>:<product>[:<optional fields>]'.")
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