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57 lines
1.9 KiB
Python
57 lines
1.9 KiB
Python
# Support code for building a C extension with crypto code
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import os
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def multi_join(paths, *path_segments):
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"""apply os.path.join on a list of paths"""
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return [os.path.join(*(path_segments + (path,))) for path in paths]
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def crypto_ext_kwargs(pc):
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system_prefix = os.environ.get('BORG_OPENSSL_PREFIX')
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if system_prefix:
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print('Detected OpenSSL [via BORG_OPENSSL_PREFIX]')
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return dict(include_dirs=[os.path.join(system_prefix, 'include')],
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library_dirs=[os.path.join(system_prefix, 'lib')],
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libraries=['crypto'])
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if pc and pc.exists('libcrypto'):
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print('Detected OpenSSL [via pkg-config]')
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return pc.parse('libcrypto')
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raise Exception('Could not find OpenSSL lib/headers, please set BORG_OPENSSL_PREFIX')
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# b2 files, structure as seen in BLAKE2 (reference implementation) project repository:
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# path relative (to this file) to the bundled library source code files
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b2_bundled_path = 'src/borg/algorithms/blake2'
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b2_sources = [
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'ref/blake2b-ref.c',
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]
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b2_includes = [
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'ref',
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]
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def b2_ext_kwargs(pc, prefer_system):
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if prefer_system:
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system_prefix = os.environ.get('BORG_LIBB2_PREFIX')
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if system_prefix:
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print('Detected and preferring libb2 [via BORG_LIBB2_PREFIX]')
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return dict(include_dirs=[os.path.join(system_prefix, 'include')],
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library_dirs=[os.path.join(system_prefix, 'lib')],
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libraries=['b2'])
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if pc and pc.installed('libb2', '>= 0.98.1'):
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print('Detected and preferring libb2 [via pkg-config]')
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return pc.parse('libb2')
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print('Using bundled BLAKE2')
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sources = multi_join(b2_sources, b2_bundled_path)
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include_dirs = multi_join(b2_includes, b2_bundled_path)
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define_macros = [('BORG_USE_BUNDLED_B2', 'YES')]
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return dict(sources=sources, include_dirs=include_dirs, define_macros=define_macros)
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