Checksum lib added
Signed-off-by: Václav Valíček <valicek1994@gmail.com>
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repo_cloner/lib/checksum.py
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repo_cloner/lib/checksum.py
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# https://stackoverflow.com/questions/6835381/python-equivalent-of-unix-cksum-function
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import os
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crc_table = [0x00000000, 0x04c11db7, 0x09823b6e, 0x0d4326d9, 0x130476dc,
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0x17c56b6b, 0x1a864db2, 0x1e475005, 0x2608edb8, 0x22c9f00f,
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0x2f8ad6d6, 0x2b4bcb61, 0x350c9b64, 0x31cd86d3, 0x3c8ea00a,
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0x384fbdbd, 0x4c11db70, 0x48d0c6c7, 0x4593e01e, 0x4152fda9,
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0x5f15adac, 0x5bd4b01b, 0x569796c2, 0x52568b75, 0x6a1936c8,
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0x6ed82b7f, 0x639b0da6, 0x675a1011, 0x791d4014, 0x7ddc5da3,
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0x709f7b7a, 0x745e66cd, 0x9823b6e0, 0x9ce2ab57, 0x91a18d8e,
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0x95609039, 0x8b27c03c, 0x8fe6dd8b, 0x82a5fb52, 0x8664e6e5,
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0xbe2b5b58, 0xbaea46ef, 0xb7a96036, 0xb3687d81, 0xad2f2d84,
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0xa9ee3033, 0xa4ad16ea, 0xa06c0b5d, 0xd4326d90, 0xd0f37027,
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0xddb056fe, 0xd9714b49, 0xc7361b4c, 0xc3f706fb, 0xceb42022,
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0xca753d95, 0xf23a8028, 0xf6fb9d9f, 0xfbb8bb46, 0xff79a6f1,
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0xe13ef6f4, 0xe5ffeb43, 0xe8bccd9a, 0xec7dd02d, 0x34867077,
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0x30476dc0, 0x3d044b19, 0x39c556ae, 0x278206ab, 0x23431b1c,
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0x2e003dc5, 0x2ac12072, 0x128e9dcf, 0x164f8078, 0x1b0ca6a1,
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0x1fcdbb16, 0x018aeb13, 0x054bf6a4, 0x0808d07d, 0x0cc9cdca,
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0x7897ab07, 0x7c56b6b0, 0x71159069, 0x75d48dde, 0x6b93dddb,
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0x6f52c06c, 0x6211e6b5, 0x66d0fb02, 0x5e9f46bf, 0x5a5e5b08,
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0x571d7dd1, 0x53dc6066, 0x4d9b3063, 0x495a2dd4, 0x44190b0d,
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0x40d816ba, 0xaca5c697, 0xa864db20, 0xa527fdf9, 0xa1e6e04e,
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0xbfa1b04b, 0xbb60adfc, 0xb6238b25, 0xb2e29692, 0x8aad2b2f,
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0x8e6c3698, 0x832f1041, 0x87ee0df6, 0x99a95df3, 0x9d684044,
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0x902b669d, 0x94ea7b2a, 0xe0b41de7, 0xe4750050, 0xe9362689,
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0xedf73b3e, 0xf3b06b3b, 0xf771768c, 0xfa325055, 0xfef34de2,
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0xc6bcf05f, 0xc27dede8, 0xcf3ecb31, 0xcbffd686, 0xd5b88683,
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0xd1799b34, 0xdc3abded, 0xd8fba05a, 0x690ce0ee, 0x6dcdfd59,
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0x608edb80, 0x644fc637, 0x7a089632, 0x7ec98b85, 0x738aad5c,
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0x774bb0eb, 0x4f040d56, 0x4bc510e1, 0x46863638, 0x42472b8f,
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0x5c007b8a, 0x58c1663d, 0x558240e4, 0x51435d53, 0x251d3b9e,
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0x21dc2629, 0x2c9f00f0, 0x285e1d47, 0x36194d42, 0x32d850f5,
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0x3f9b762c, 0x3b5a6b9b, 0x0315d626, 0x07d4cb91, 0x0a97ed48,
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0x0e56f0ff, 0x1011a0fa, 0x14d0bd4d, 0x19939b94, 0x1d528623,
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0xf12f560e, 0xf5ee4bb9, 0xf8ad6d60, 0xfc6c70d7, 0xe22b20d2,
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0xe6ea3d65, 0xeba91bbc, 0xef68060b, 0xd727bbb6, 0xd3e6a601,
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0xdea580d8, 0xda649d6f, 0xc423cd6a, 0xc0e2d0dd, 0xcda1f604,
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0xc960ebb3, 0xbd3e8d7e, 0xb9ff90c9, 0xb4bcb610, 0xb07daba7,
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0xae3afba2, 0xaafbe615, 0xa7b8c0cc, 0xa379dd7b, 0x9b3660c6,
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0x9ff77d71, 0x92b45ba8, 0x9675461f, 0x8832161a, 0x8cf30bad,
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0x81b02d74, 0x857130c3, 0x5d8a9099, 0x594b8d2e, 0x5408abf7,
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0x50c9b640, 0x4e8ee645, 0x4a4ffbf2, 0x470cdd2b, 0x43cdc09c,
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0x7b827d21, 0x7f436096, 0x7200464f, 0x76c15bf8, 0x68860bfd,
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0x6c47164a, 0x61043093, 0x65c52d24, 0x119b4be9, 0x155a565e,
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0x18197087, 0x1cd86d30, 0x029f3d35, 0x065e2082, 0x0b1d065b,
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0x0fdc1bec, 0x3793a651, 0x3352bbe6, 0x3e119d3f, 0x3ad08088,
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0x2497d08d, 0x2056cd3a, 0x2d15ebe3, 0x29d4f654, 0xc5a92679,
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0xc1683bce, 0xcc2b1d17, 0xc8ea00a0, 0xd6ad50a5, 0xd26c4d12,
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0xdf2f6bcb, 0xdbee767c, 0xe3a1cbc1, 0xe760d676, 0xea23f0af,
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0xeee2ed18, 0xf0a5bd1d, 0xf464a0aa, 0xf9278673, 0xfde69bc4,
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0x89b8fd09, 0x8d79e0be, 0x803ac667, 0x84fbdbd0, 0x9abc8bd5,
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0x9e7d9662, 0x933eb0bb, 0x97ffad0c, 0xafb010b1, 0xab710d06,
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0xa6322bdf, 0xa2f33668, 0xbcb4666d, 0xb8757bda, 0xb5365d03,
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0xb1f740b4]
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def unsigned(n):
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return n & 0xffffffff
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def mem_crc(b):
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n = len(b)
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i = c = s = 0
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for c in b:
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tabidx = (s >> 24) ^ c
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s = unsigned((s << 8)) ^ crc_table[tabidx]
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while n:
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c = n & 0o0377
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n = n >> 8
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s = unsigned(s << 8) ^ crc_table[(s >> 24) ^ c]
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return unsigned(~s)
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def gen_repo_hashed_name(url: str):
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base = os.path.basename(url)
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# remove suffix
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if base.endswith(".git") and not base == ".git":
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base = os.path.splitext(base)[0]
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rest = os.path.dirname(url)
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# .git (working, non bare repo)
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if base == ".git":
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base = os.path.basename(rest)
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rest = os.path.dirname(rest)
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# get repo namespace/user
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namespace = os.path.basename(rest)
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# split possible domain:namespace/repo.git
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if ":" in namespace:
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namespace = namespace.split(":")[1]
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# backwards compatibility
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url += "\n"
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# checksum
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checksum = mem_crc(url.encode())
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# add suffix
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return f"{namespace}_{base}_{str(checksum)}.git"
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56
tests/lib/test_checksum.py
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tests/lib/test_checksum.py
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import pytest
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from repo_cloner.lib.checksum import mem_crc, gen_repo_hashed_name
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@pytest.mark.parametrize('expected,input', [
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(636040475, '114>N3YY\'sP'),
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(3683742091, 'W-=k|</a0iuk[zKl`TCPJ@Lg'),
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(2345263976, 'PdRDKQOGUR9N%u[Z]V8)Bk&w4pZA&fL)'),
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(4257500092, 'H<k}7'),
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(3154389339, '8GO8Z[PYc*n7.q5h3Z'),
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(2072333469, '*9XT,vR[T")MKn_?Ipjz7i\'sK4v-x$(7'),
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(2744233032, 'xhA`:C;ayjRde=9waMz^?;A'),
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(1487552026, '4.W\' * HXKyT2S'),
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(1285622434, '(mf6\\,/^p+75]poQoE+-Z'),
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(241589744, 'Wa[Z~ut@IV:WtuY[[vqP9\\]D7!wsr4)n~'),
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(3697213109, 'ZOU)K:0u#'),
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(1906064925, 'xstE~dJc\'89InXPfaQt}Y{'),
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(3801716305, 'vqR`:@Cv%b3t'),
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(3666699445, 'n{G[}]u-XzYE[?;p.+_4V.C1b-D&'),
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(1647934306, ':l_BcBfmh:Cy\'Y\'4@1O'),
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(2250612563, 'dXd)xD`RwCkHCu)1z-d\\PT)/X:bsFQ,f2'),
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(103903630, 'mB9I_BO;rG):Ss3}-_+GHh=*#'),
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(3766121887, 'J3_`pKPo'),
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(93663118, 'N6:y[P/nlA@xGQ`<LLcv|a\'i"J>?a'),
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(609503553, 'Sa=LH{I0zxW@;=DB8}9@p#W&tN<0N'),
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(1992681077, ';7zXbN;|+-t{+OqNXLev~118>#}/4hlxnyxj'),
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(410705017, 'hwf:6s*ecO#'),
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(50594608, '2TgG@I'),
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(2643914704, ':Sil>z)"Q{8V83(Fx6kf'),
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(1603724503, 'P):`,(z>4d?c7@.IY%[yTZa'),
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(2699769372, 'I;jqRmobBJ7B'),
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(944082450, '~8"_te]:1x_dK$c}R&'),
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])
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def test_mem_crc(expected, input: str):
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assert expected == mem_crc(input.encode())
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@pytest.mark.parametrize('path,url', [
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('zpravovnik_skype-fuckup-container_148175543.git', 'git@git.swamp.ga:zpravovnik/skype-fuckup-container.git'),
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('ohl_ink-depman_338374875.git', 'git@git.swamp.ga:ohl/ink-depman.git'),
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('ohl_ink-fakemodbus_3727882297.git', 'git@git.swamp.ga:ohl/ink-fakemodbus.git'),
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('kamikaze_laminar-wrap_3224706074.git', 'git@git.swamp.ga:kamikaze/laminar-wrap.git'),
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('graemeg_lazarus_3217969491.git', 'https://github.com/graemeg/lazarus.git'),
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('tojemi_php-test-container_592814724.git', 'git@git.swamp.ga:tojemi/php-test-container.git'),
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('kamikaze_repo-cloner_1874209794.git', 'git@git.sw3.cz:kamikaze/repo-cloner.git'),
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('smalls_shakeeper_2796015744.git', 'git@git.swamp.ga:smalls/shakeeper.git'),
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('ycnet_tetsssd_809780385.git', 'git@git.swamp.ga:ycnet/tetsssd.git'),
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('kamikaze_repo-cloner_3447183070.git', 'https://git.sw3.cz/kamikaze/repo-cloner.git'),
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('valicek_testvn_3613709968.git', 'git@git.swamp.ga:valicek/testvn.git'),
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('valicek_thermocouple-tables_3520628733.git', 'git@git.swamp.ga:valicek/thermocouple-tables.git'),
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('tojemi_tojemi.cz_34301162.git', 'git@git.swamp.ga:tojemi/tojemi.cz.git'),
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('numid_updater-toolbox_2903171139.git', 'git@git.swamp.ga:numid/updater-toolbox.git'),
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('dev_project_1164685478.git', '/home/git/dev/project/.git'),
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])
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def test_gen_repo_hashed_name(path, url):
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assert path == gen_repo_hashed_name(url)
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