19bb1c7ef2
So we can use it from another module without feeling dirty. MozReview-Commit-ID: 1TCk9dda6mL
46 lines
1.4 KiB
Python
46 lines
1.4 KiB
Python
# This Source Code Form is subject to the terms of the Mozilla Public
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# License, v. 2.0. If a copy of the MPL was not distributed with this
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# file, You can obtain one at http://mozilla.org/MPL/2.0/.
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from __future__ import absolute_import, print_function, unicode_literals
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from mozbuild.util import memoize
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from mozpack.files import FileFinder
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import mozpack.path as mozpath
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import hashlib
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@memoize
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def hash_path(path):
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"""Hash a single file.
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Returns the SHA-256 hash in hex form.
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"""
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with open(path) as fh:
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return hashlib.sha256(fh.read()).hexdigest()
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def hash_paths(base_path, patterns):
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"""
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Give a list of path patterns, return a digest of the contents of all
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the corresponding files, similarly to git tree objects or mercurial
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manifests.
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Each file is hashed. The list of all hashes and file paths is then
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itself hashed to produce the result.
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"""
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finder = FileFinder(base_path)
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h = hashlib.sha256()
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files = {}
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for pattern in patterns:
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found = list(finder.find(pattern))
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if found:
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files.update(found)
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else:
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raise Exception('%s did not match anything' % pattern)
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for path in sorted(files.keys()):
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h.update('{} {}\n'.format(
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hash_path(mozpath.abspath(mozpath.join(base_path, path))),
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mozpath.normsep(path)
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))
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return h.hexdigest()
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