From 9eece76ad998ff202335b40c719c21c47a61cc20 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?V=C3=A1clav=20Val=C3=AD=C4=8Dek?= Date: Tue, 26 Jul 2022 02:51:41 +0200 Subject: [PATCH] Checksum lib added MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Václav Valíček --- repo_cloner/lib/checksum.py | 100 ++++++++++++++++++++++++++++++++++++ tests/lib/test_checksum.py | 56 ++++++++++++++++++++ 2 files changed, 156 insertions(+) create mode 100644 repo_cloner/lib/checksum.py create mode 100644 tests/lib/test_checksum.py diff --git a/repo_cloner/lib/checksum.py b/repo_cloner/lib/checksum.py new file mode 100644 index 0000000..7ac6b1a --- /dev/null +++ b/repo_cloner/lib/checksum.py @@ -0,0 +1,100 @@ +# https://stackoverflow.com/questions/6835381/python-equivalent-of-unix-cksum-function + +import os + +crc_table = [0x00000000, 0x04c11db7, 0x09823b6e, 0x0d4326d9, 0x130476dc, + 0x17c56b6b, 0x1a864db2, 0x1e475005, 0x2608edb8, 0x22c9f00f, + 0x2f8ad6d6, 0x2b4bcb61, 0x350c9b64, 0x31cd86d3, 0x3c8ea00a, + 0x384fbdbd, 0x4c11db70, 0x48d0c6c7, 0x4593e01e, 0x4152fda9, + 0x5f15adac, 0x5bd4b01b, 0x569796c2, 0x52568b75, 0x6a1936c8, + 0x6ed82b7f, 0x639b0da6, 0x675a1011, 0x791d4014, 0x7ddc5da3, + 0x709f7b7a, 0x745e66cd, 0x9823b6e0, 0x9ce2ab57, 0x91a18d8e, + 0x95609039, 0x8b27c03c, 0x8fe6dd8b, 0x82a5fb52, 0x8664e6e5, + 0xbe2b5b58, 0xbaea46ef, 0xb7a96036, 0xb3687d81, 0xad2f2d84, + 0xa9ee3033, 0xa4ad16ea, 0xa06c0b5d, 0xd4326d90, 0xd0f37027, + 0xddb056fe, 0xd9714b49, 0xc7361b4c, 0xc3f706fb, 0xceb42022, + 0xca753d95, 0xf23a8028, 0xf6fb9d9f, 0xfbb8bb46, 0xff79a6f1, + 0xe13ef6f4, 0xe5ffeb43, 0xe8bccd9a, 0xec7dd02d, 0x34867077, + 0x30476dc0, 0x3d044b19, 0x39c556ae, 0x278206ab, 0x23431b1c, + 0x2e003dc5, 0x2ac12072, 0x128e9dcf, 0x164f8078, 0x1b0ca6a1, + 0x1fcdbb16, 0x018aeb13, 0x054bf6a4, 0x0808d07d, 0x0cc9cdca, + 0x7897ab07, 0x7c56b6b0, 0x71159069, 0x75d48dde, 0x6b93dddb, + 0x6f52c06c, 0x6211e6b5, 0x66d0fb02, 0x5e9f46bf, 0x5a5e5b08, + 0x571d7dd1, 0x53dc6066, 0x4d9b3063, 0x495a2dd4, 0x44190b0d, + 0x40d816ba, 0xaca5c697, 0xa864db20, 0xa527fdf9, 0xa1e6e04e, + 0xbfa1b04b, 0xbb60adfc, 0xb6238b25, 0xb2e29692, 0x8aad2b2f, + 0x8e6c3698, 0x832f1041, 0x87ee0df6, 0x99a95df3, 0x9d684044, + 0x902b669d, 0x94ea7b2a, 0xe0b41de7, 0xe4750050, 0xe9362689, + 0xedf73b3e, 0xf3b06b3b, 0xf771768c, 0xfa325055, 0xfef34de2, + 0xc6bcf05f, 0xc27dede8, 0xcf3ecb31, 0xcbffd686, 0xd5b88683, + 0xd1799b34, 0xdc3abded, 0xd8fba05a, 0x690ce0ee, 0x6dcdfd59, + 0x608edb80, 0x644fc637, 0x7a089632, 0x7ec98b85, 0x738aad5c, + 0x774bb0eb, 0x4f040d56, 0x4bc510e1, 0x46863638, 0x42472b8f, + 0x5c007b8a, 0x58c1663d, 0x558240e4, 0x51435d53, 0x251d3b9e, + 0x21dc2629, 0x2c9f00f0, 0x285e1d47, 0x36194d42, 0x32d850f5, + 0x3f9b762c, 0x3b5a6b9b, 0x0315d626, 0x07d4cb91, 0x0a97ed48, + 0x0e56f0ff, 0x1011a0fa, 0x14d0bd4d, 0x19939b94, 0x1d528623, + 0xf12f560e, 0xf5ee4bb9, 0xf8ad6d60, 0xfc6c70d7, 0xe22b20d2, + 0xe6ea3d65, 0xeba91bbc, 0xef68060b, 0xd727bbb6, 0xd3e6a601, + 0xdea580d8, 0xda649d6f, 0xc423cd6a, 0xc0e2d0dd, 0xcda1f604, + 0xc960ebb3, 0xbd3e8d7e, 0xb9ff90c9, 0xb4bcb610, 0xb07daba7, + 0xae3afba2, 0xaafbe615, 0xa7b8c0cc, 0xa379dd7b, 0x9b3660c6, + 0x9ff77d71, 0x92b45ba8, 0x9675461f, 0x8832161a, 0x8cf30bad, + 0x81b02d74, 0x857130c3, 0x5d8a9099, 0x594b8d2e, 0x5408abf7, + 0x50c9b640, 0x4e8ee645, 0x4a4ffbf2, 0x470cdd2b, 0x43cdc09c, + 0x7b827d21, 0x7f436096, 0x7200464f, 0x76c15bf8, 0x68860bfd, + 0x6c47164a, 0x61043093, 0x65c52d24, 0x119b4be9, 0x155a565e, + 0x18197087, 0x1cd86d30, 0x029f3d35, 0x065e2082, 0x0b1d065b, + 0x0fdc1bec, 0x3793a651, 0x3352bbe6, 0x3e119d3f, 0x3ad08088, + 0x2497d08d, 0x2056cd3a, 0x2d15ebe3, 0x29d4f654, 0xc5a92679, + 0xc1683bce, 0xcc2b1d17, 0xc8ea00a0, 0xd6ad50a5, 0xd26c4d12, + 0xdf2f6bcb, 0xdbee767c, 0xe3a1cbc1, 0xe760d676, 0xea23f0af, + 0xeee2ed18, 0xf0a5bd1d, 0xf464a0aa, 0xf9278673, 0xfde69bc4, + 0x89b8fd09, 0x8d79e0be, 0x803ac667, 0x84fbdbd0, 0x9abc8bd5, + 0x9e7d9662, 0x933eb0bb, 0x97ffad0c, 0xafb010b1, 0xab710d06, + 0xa6322bdf, 0xa2f33668, 0xbcb4666d, 0xb8757bda, 0xb5365d03, + 0xb1f740b4] + + +def unsigned(n): + return n & 0xffffffff + + +def mem_crc(b): + n = len(b) + i = c = s = 0 + for c in b: + tabidx = (s >> 24) ^ c + s = unsigned((s << 8)) ^ crc_table[tabidx] + while n: + c = n & 0o0377 + n = n >> 8 + s = unsigned(s << 8) ^ crc_table[(s >> 24) ^ c] + return unsigned(~s) + + +def gen_repo_hashed_name(url: str): + base = os.path.basename(url) + # remove suffix + if base.endswith(".git") and not base == ".git": + base = os.path.splitext(base)[0] + + rest = os.path.dirname(url) + + # .git (working, non bare repo) + if base == ".git": + base = os.path.basename(rest) + rest = os.path.dirname(rest) + + # get repo namespace/user + namespace = os.path.basename(rest) + # split possible domain:namespace/repo.git + if ":" in namespace: + namespace = namespace.split(":")[1] + + # backwards compatibility + url += "\n" + # checksum + checksum = mem_crc(url.encode()) + # add suffix + return f"{namespace}_{base}_{str(checksum)}.git" diff --git a/tests/lib/test_checksum.py b/tests/lib/test_checksum.py new file mode 100644 index 0000000..108afea --- /dev/null +++ b/tests/lib/test_checksum.py @@ -0,0 +1,56 @@ +import pytest +from repo_cloner.lib.checksum import mem_crc, gen_repo_hashed_name + + +@pytest.mark.parametrize('expected,input', [ + (636040475, '114>N3YY\'sP'), + (3683742091, 'W-=k|?a'), + (609503553, 'Sa=LH{I0zxW@;=DB8}9@p#W&tN<0N'), + (1992681077, ';7zXbN;|+-t{+OqNXLev~118>#}/4hlxnyxj'), + (410705017, 'hwf:6s*ecO#'), + (50594608, '2TgG@I'), + (2643914704, ':Sil>z)"Q{8V83(Fx6kf'), + (1603724503, 'P):`,(z>4d?c7@.IY%[yTZa'), + (2699769372, 'I;jqRmobBJ7B'), + (944082450, '~8"_te]:1x_dK$c}R&'), +]) +def test_mem_crc(expected, input: str): + assert expected == mem_crc(input.encode()) + + +@pytest.mark.parametrize('path,url', [ + ('zpravovnik_skype-fuckup-container_148175543.git', 'git@git.swamp.ga:zpravovnik/skype-fuckup-container.git'), + ('ohl_ink-depman_338374875.git', 'git@git.swamp.ga:ohl/ink-depman.git'), + ('ohl_ink-fakemodbus_3727882297.git', 'git@git.swamp.ga:ohl/ink-fakemodbus.git'), + ('kamikaze_laminar-wrap_3224706074.git', 'git@git.swamp.ga:kamikaze/laminar-wrap.git'), + ('graemeg_lazarus_3217969491.git', 'https://github.com/graemeg/lazarus.git'), + ('tojemi_php-test-container_592814724.git', 'git@git.swamp.ga:tojemi/php-test-container.git'), + ('kamikaze_repo-cloner_1874209794.git', 'git@git.sw3.cz:kamikaze/repo-cloner.git'), + ('smalls_shakeeper_2796015744.git', 'git@git.swamp.ga:smalls/shakeeper.git'), + ('ycnet_tetsssd_809780385.git', 'git@git.swamp.ga:ycnet/tetsssd.git'), + ('kamikaze_repo-cloner_3447183070.git', 'https://git.sw3.cz/kamikaze/repo-cloner.git'), + ('valicek_testvn_3613709968.git', 'git@git.swamp.ga:valicek/testvn.git'), + ('valicek_thermocouple-tables_3520628733.git', 'git@git.swamp.ga:valicek/thermocouple-tables.git'), + ('tojemi_tojemi.cz_34301162.git', 'git@git.swamp.ga:tojemi/tojemi.cz.git'), + ('numid_updater-toolbox_2903171139.git', 'git@git.swamp.ga:numid/updater-toolbox.git'), + ('dev_project_1164685478.git', '/home/git/dev/project/.git'), +]) +def test_gen_repo_hashed_name(path, url): + assert path == gen_repo_hashed_name(url)