27 lines
710 B
Python
27 lines
710 B
Python
from build.verify import verify_file_digest
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import os
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import urllib.request
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def download_and_verify(url, md5, parent_path):
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"""Download a file, verify its MD5 checksum and return the local path."""
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os.makedirs(parent_path, exist_ok=True)
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path = os.path.join(parent_path, os.path.basename(url))
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try:
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if verify_file_digest(path, md5): return path
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os.unlink(path)
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except FileNotFoundError:
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pass
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tmp_path = path + '.tmp'
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print("download", url)
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urllib.request.urlretrieve(url, tmp_path)
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if not verify_file_digest(tmp_path, md5):
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os.unlink(tmp_path)
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raise RuntimeError("Digest mismatch")
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os.rename(tmp_path, path)
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return path
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