annotate hgext/hgk.py @ 46585:60b2b7ecf9cb

copies-rust: use imrs::OrdSet instead of imrs::HashSet

This yield small speedup all over the board, and a large one for our slower
cases:

Repo            Case                                  Source-Rev   Dest-Rev      # of revisions  old time    new time      Difference    Factor    time per rev
---------------------------------------------------------------------------------------------------------------------------------------------------------------
mozilla-try     x0000_revs_xx000_added_x000_copies    89294cd501d9 7ccb2fc7ccb5 :  97052 revs,   2.034596 s,   1.465264 s,  -0.569332 s, × 0.7202,    15 µs/rev
mozilla-try     x0000_revs_x0000_added_x0000_copies   e928c65095ed e951f4ad123a :  52031 revs,   0.694030 s,   0.690376 s,  -0.003654 s, × 0.9947,    13 µs/rev
mozilla-try     x00000_revs_x_added_0_copies          6a320851d377 1ebb79acd503 : 363753 revs,   4.407723 s,   4.011322 s,  -0.396401 s, × 0.9101,    11 µs/rev
mozilla-try     x00000_revs_x00000_added_0_copies     dc8a3ca7010e d16fde900c9c :  34414 revs,   0.574355 s,   0.573541 s,  -0.000814 s, × 0.9986,    16 µs/rev
mozilla-try     x00000_revs_x_added_x_copies          5173c4b6f97c 95d83ee7242d : 362229 revs,   4.457827 s,   3.981133 s,  -0.476694 s, × 0.8931,    10 µs/rev
mozilla-try     x00000_revs_x000_added_x_copies       9126823d0e9c ca82787bb23c : 359344 revs,   4.351696 s,   3.996647 s,  -0.355049 s, × 0.9184,    11 µs/rev
mozilla-try     x00000_revs_x00000_added_x0000_copies 1b661134e2ca 1ae03d022d6d : 228985 revs,  80.828689 s,  50.244975 s, -30.583714 s, × 0.6216,   219 µs/rev
mozilla-try     x00000_revs_x00000_added_x000_copies  9b2a99adc05e 8e29777b48e6 : 382065 revs,  34.094064 s,  20.030023 s, -14.064041 s, × 0.5875,    52 µs/rev
private                                                                         : 459513 revs,  27.435529 s,  24.490825 s,  -2.944704 s, × 0.8927,    53 µs/rev

We also got significantly faster than the implementation using is_ancestors
except for one of our reference case:

Repo            Case                                  Source-Rev   Dest-Rev      # of revisions  old time    new time      Difference    Factor    time per rev
---------------------------------------------------------------------------------------------------------------------------------------------------------------
mozilla-try     x00000_revs_x_added_0_copies          6a320851d377 1ebb79acd503 : 363753 revs,   5.138169 s,   4.011322 s,  -1.126847 s, × 0.7807,    11 µs/rev
mozilla-try     x00000_revs_x_added_x_copies          5173c4b6f97c 95d83ee7242d : 362229 revs,   5.127809 s,   3.981133 s,  -1.146676 s, × 0.7764,    10 µs/rev
mozilla-try     x00000_revs_x000_added_x_copies       9126823d0e9c ca82787bb23c : 359344 revs,   4.971136 s,   3.996647 s,  -0.974489 s, × 0.8040,    11 µs/rev
mozilla-try     x00000_revs_x0000_added_x0000_copies  8d3fafa80d4b eb884023b810 : 192665 revs,   1.741678 s,   1.520607 s,  -0.221071 s, × 0.8731,     7 µs/rev
private                                                                         : 459513 revs,  37.179470 s,  24.490825 s, -12.688645 s, × 0.6587,    53 µs/rev
mozilla-try     x00000_revs_x00000_added_x0000_copies 1b661134e2ca 1ae03d022d6d : 228985 revs,  40.314822 s,  50.244975 s,  +9.930153 s, × 1.2463,   219 µs/rev


Below are three different benchmark comparing this changeset to:
* the previous one,
* the implementation based on `is_anscestors`,
* the filelog copy tracing.


### Compared to the previous ones

Repo            Case                                  Source-Rev   Dest-Rev      # of revisions  old time    new time      Difference    Factor    time per rev
---------------------------------------------------------------------------------------------------------------------------------------------------------------
mercurial       x_revs_x_added_0_copies               ad6b123de1c7 39cfcef4f463 :      1 revs,   0.000043 s,   0.000041 s,  -0.000002 s, × 0.9535,    41 µs/rev
mercurial       x_revs_x_added_x_copies               2b1c78674230 0c1d10351869 :      6 revs,   0.000114 s,   0.000116 s,  +0.000002 s, × 1.0175,    19 µs/rev
mercurial       x000_revs_x000_added_x_copies         81f8ff2a9bf2 dd3267698d84 :   1032 revs,   0.004899 s,   0.004933 s,  +0.000034 s, × 1.0069,     4 µs/rev
pypy            x_revs_x_added_0_copies               aed021ee8ae8 099ed31b181b :      9 revs,   0.000196 s,   0.000193 s,  -0.000003 s, × 0.9847,    21 µs/rev
pypy            x_revs_x000_added_0_copies            4aa4e1f8e19a 359343b9ac0e :      1 revs,   0.000049 s,   0.000048 s,  -0.000001 s, × 0.9796,    48 µs/rev
pypy            x_revs_x_added_x_copies               ac52eb7bbbb0 72e022663155 :      7 revs,   0.000117 s,   0.000114 s,  -0.000003 s, × 0.9744,    16 µs/rev
pypy            x_revs_x00_added_x_copies             c3b14617fbd7 ace7255d9a26 :      1 revs,   0.6f1f4a s,   0.000319 s,  -0.000003 s, × 0.9907,   319 µs/rev
pypy            x_revs_x000_added_x000_copies         df6f7a526b60 a83dc6a2d56f :      6 revs,   0.011856 s,   0.012025 s,  +0.000169 s, × 1.0143,  2004 µs/rev
pypy            x000_revs_xx00_added_0_copies         89a76aede314 2f22446ff07e :   4785 revs,   0.050992 s,   0.050525 s,  -0.000467 s, × 0.9908,    10 µs/rev
pypy            x000_revs_x000_added_x_copies         8a3b5bfd266e 2c68e87c3efe :   6780 revs,   0.087444 s,   0.085713 s,  -0.001731 s, × 0.9802,    12 µs/rev
pypy            x000_revs_x000_added_x000_copies      89a76aede314 7b3dda341c84 :   5441 revs,   0.062487 s,   0.061825 s,  -0.000662 s, × 0.9894,    11 µs/rev
pypy            x0000_revs_x_added_0_copies           d1defd0dc478 c9cb1334cc78 :  43645 revs,   0.634909 s,   0.543998 s,  -0.090911 s, × 0.8568,    12 µs/rev
pypy            x0000_revs_xx000_added_0_copies       bf2c629d0071 4ffed77c095c :      2 revs,   0.013360 s,   0.013455 s,  +0.000095 s, × 1.0071,  6727 µs/rev
pypy            x0000_revs_xx000_added_x000_copies    08ea3258278e d9fa043f30c0 :  11316 revs,   0.120775 s,   0.117479 s,  -0.003296 s, × 0.9727,    10 µs/rev
netbeans        x_revs_x_added_0_copies               fb0955ffcbcd a01e9239f9e7 :      2 revs,   0.000085 s,   0.000084 s,  -0.000001 s, × 0.9882,    42 µs/rev
netbeans        x_revs_x000_added_0_copies            6f360122949f 20eb231cc7d0 :      2 revs,   0.000108 s,   0.000111 s,  +0.000003 s, × 1.0278,    55 µs/rev
netbeans        x_revs_x_added_x_copies               1ada3faf6fb6 5a39d12eecf4 :      3 revs,   0.000176 s,   0.000175 s,  -0.000001 s, × 0.9943,    58 µs/rev
netbeans        x_revs_x00_added_x_copies             35be93ba1e2c 9eec5e90c05f :      9 revs,   0.000747 s,   0.000732 s,  -0.000015 s, × 0.9799,    81 µs/rev
netbeans        x000_revs_xx00_added_0_copies         eac3045b4fdd 51d4ae7f1290 :   1421 revs,   0.010128 s,   0.010062 s,  -0.000066 s, × 0.9935,     7 µs/rev
netbeans        x000_revs_x000_added_x_copies         e2063d266acd 6081d72689dc :   1533 revs,   0.015899 s,   0.015659 s,  -0.000240 s, × 0.9849,    10 µs/rev
netbeans        x000_revs_x000_added_x000_copies      ff453e9fee32 411350406ec2 :   5750 revs,   0.062215 s,   0.062744 s,  +0.000529 s, × 1.0085,    10 µs/rev
netbeans        x0000_revs_xx000_added_x000_copies    588c2d1ced70 1aad62e59ddd :  66949 revs,   0.521004 s,   0.499449 s,  -0.021555 s, × 0.9586,     7 µs/rev
mozilla-central x_revs_x_added_0_copies               3697f962bb7b 7015fcdd43a2 :      2 revs,   0.000090 s,   0.000088 s,  -0.000002 s, × 0.9778,    44 µs/rev
mozilla-central x_revs_x000_added_0_copies            dd390860c6c9 40d0c5bed75d :      8 revs,   0.000264 s,   0.000266 s,  +0.000002 s, × 1.0076,    33 µs/rev
mozilla-central x_revs_x_added_x_copies               8d198483ae3b 14207ffc2b2f :      9 revs,   0.000186 s,   0.000182 s,  -0.000004 s, × 0.9785,    20 µs/rev
mozilla-central x_revs_x00_added_x_copies             98cbc58cc6bc 446a150332c3 :      7 revs,   0.000660 s,   0.000656 s,  -0.000004 s, × 0.9939,    93 µs/rev
mozilla-central x_revs_x000_added_x000_copies         3c684b4b8f68 0a5e72d1b479 :      3 revs,   0.003542 s,   0.003389 s,  -0.000153 s, × 0.9568,  1129 µs/rev
mozilla-central x_revs_x0000_added_x0000_copies       effb563bb7e5 c07a39dc4e80 :      6 revs,   0.071574 s,   0.075882 s,  +0.004308 s, × 1.0602, 12647 µs/rev
mozilla-central x000_revs_xx00_added_0_copies         6100d773079a 04a55431795e :   1593 revs,   0.006498 s,   0.006479 s,  -0.000019 s, × 0.9971,     4 µs/rev
mozilla-central x000_revs_x000_added_x_copies         9f17a6fc04f9 2d37b966abed :     41 revs,   0.005206 s,   0.004889 s,  -0.000317 s, × 0.9391,   119 µs/rev
mozilla-central x000_revs_x000_added_x000_copies      7c97034feb78 4407bd0c6330 :   7839 revs,   0.065535 s,   0.064394 s,  -0.001141 s, × 0.9826,     8 µs/rev
mozilla-central x0000_revs_xx000_added_0_copies       9eec5917337d 67118cc6dcad :    615 revs,   0.027139 s,   0.026815 s,  -0.000324 s, × 0.9881,    43 µs/rev
mozilla-central x0000_revs_xx000_added_x000_copies    f78c615a656c 96a38b690156 :  30263 revs,   0.201924 s,   0.cc85eb s,  +0.000940 s, × 1.0047,     6 µs/rev
mozilla-central x00000_revs_x0000_added_x0000_copies  6832ae71433c 4c222a1d9a00 : 153721 revs,   1.257201 s,   1.219445 s,  -0.037756 s, × 0.9700,     7 µs/rev
mozilla-central x00000_revs_x00000_added_x000_copies  76caed42cf7c 1daa622bbe42 : 204976 revs,   1.663045 s,   1.613857 s,  -0.049188 s, × 0.9704,     7 µs/rev
mozilla-try     x_revs_x_added_0_copies               aaf6dde0deb8 9790f499805a :      2 revs,   0.000866 s,   0.000873 s,  +0.000007 s, × 1.0081,   436 µs/rev
mozilla-try     x_revs_x000_added_0_copies            d8d0222927b4 5bb8ce8c7450 :      2 revs,   0.000883 s,   0.000885 s,  +0.000002 s, × 1.0023,   442 µs/rev
mozilla-try     x_revs_x_added_x_copies               092fcca11bdb 936255a0384a :      4 revs,   0.000163 s,   0.000161 s,  -0.000002 s, × 0.9877,    40 µs/rev
mozilla-try     x_revs_x00_added_x_copies             b53d2fadbdb5 017afae788ec :      2 revs,   0.001139 s,   0.001138 s,  -0.000001 s, × 0.9991,   569 µs/rev
mozilla-try     x_revs_x000_added_x000_copies         20408ad61ce5 6f0ee96e21ad :      1 revs,   0.032753 s,   0.033399 s,  +0.000646 s, × 1.0197, 33399 µs/rev
mozilla-try     x_revs_x0000_added_x0000_copies       effb563bb7e5 c07a39dc4e80 :      6 revs,   0.073266 s,   0.075445 s,  +0.002179 s, × 1.0297, 12574 µs/rev
mozilla-try     x000_revs_xx00_added_0_copies         6100d773079a 04a55431795e :   1593 revs,   0.006567 s,   0.006456 s,  -0.000111 s, × 0.9831,     4 µs/rev
mozilla-try     x000_revs_x000_added_x_copies         9f17a6fc04f9 2d37b966abed :     41 revs,   0.005427 s,   0.005462 s,  +0.000035 s, × 1.0064,   133 µs/rev
mozilla-try     x000_revs_x000_added_x000_copies      1346fd0130e4 4c65cbdabc1f :   6657 revs,   0.064058 s,   0.064117 s,  +0.000059 s, × 1.0009,     9 µs/rev
mozilla-try     x0000_revs_x_added_0_copies           63519bfd42ee a36a2a865d92 :  40314 revs,   0.303320 s,   0.297563 s,  -0.005757 s, × 0.9810,     7 µs/rev
mozilla-try     x0000_revs_x_added_x_copies           9fe69ff0762d bcabf2a78927 :  38690 revs,   0.288456 s,   0.282463 s,  -0.005993 s, × 0.9792,     7 µs/rev
mozilla-try     x0000_revs_xx000_added_x_copies       156f6e2674f2 4d0f2c178e66 :   8598 revs,   0.085925 s,   0.084038 s,  -0.001887 s, × 0.9780,     9 µs/rev
mozilla-try     x0000_revs_xx000_added_0_copies       9eec5917337d 67118cc6dcad :    615 revs,   0.027302 s,   0.027306 s,  +0.000004 s, × 1.0001,    44 µs/rev
mozilla-try     x0000_revs_xx000_added_x000_copies    89294cd501d9 7ccb2fc7ccb5 :  97052 revs,   2.034596 s,   1.465264 s,  -0.569332 s, × 0.7202,    15 µs/rev
mozilla-try     x0000_revs_x0000_added_x0000_copies   e928c65095ed e951f4ad123a :  52031 revs,   0.694030 s,   0.690376 s,  -0.003654 s, × 0.9947,    13 µs/rev
mozilla-try     x00000_revs_x_added_0_copies          6a320851d377 1ebb79acd503 : 363753 revs,   4.407723 s,   4.011322 s,  -0.396401 s, × 0.9101,    11 µs/rev
mozilla-try     x00000_revs_x00000_added_0_copies     dc8a3ca7010e d16fde900c9c :  34414 revs,   0.574355 s,   0.573541 s,  -0.000814 s, × 0.9986,    16 µs/rev
mozilla-try     x00000_revs_x_added_x_copies          5173c4b6f97c 95d83ee7242d : 362229 revs,   4.457827 s,   3.981133 s,  -0.476694 s, × 0.8931,    10 µs/rev
mozilla-try     x00000_revs_x000_added_x_copies       9126823d0e9c ca82787bb23c : 359344 revs,   4.351696 s,   3.996647 s,  -0.355049 s, × 0.9184,    11 µs/rev
mozilla-try     x00000_revs_x0000_added_x0000_copies  8d3fafa80d4b eb884023b810 : 192665 revs,   1.570065 s,   1.520607 s,  -0.049458 s, × 0.9685,     7 µs/rev
mozilla-try     x00000_revs_x00000_added_x0000_copies 1b661134e2ca 1ae03d022d6d : 228985 revs,  80.828689 s,  50.244975 s, -30.583714 s, × 0.6216,   219 µs/rev
mozilla-try     x00000_revs_x00000_added_x000_copies  9b2a99adc05e 8e29777b48e6 : 382065 revs,  34.094064 s,  20.030023 s, -14.064041 s, × 0.5875,    52 µs/rev
private                                                                         : 459513 revs,  27.435529 s,  24.490825 s,  -2.944704 s, × 0.8927,    53 µs/rev

### Compared to the implementation using `is_anscestor`

Repo            Case                                  Source-Rev   Dest-Rev      # of revisions  old time    new time      Difference    Factor    time per rev
---------------------------------------------------------------------------------------------------------------------------------------------------------------
mercurial       x_revs_x_added_0_copies               ad6b123de1c7 39cfcef4f463 :      1 revs,   0.000042 s,   0.000041 s,  -0.000001 s, × 0.9762,    41 µs/rev
mercurial       x_revs_x_added_x_copies               2b1c78674230 0c1d10351869 :      6 revs,   0.000110 s,   0.000116 s,  +0.000006 s, × 1.0545,    19 µs/rev
mercurial       x000_revs_x000_added_x_copies         81f8ff2a9bf2 dd3267698d84 :   1032 revs,   0.004945 s,   0.004933 s,  -0.000012 s, × 0.9976,     4 µs/rev
pypy            x_revs_x_added_0_copies               aed021ee8ae8 099ed31b181b :      9 revs,   0.000192 s,   0.000193 s,  +0.000001 s, × 1.0052,    21 µs/rev
pypy            x_revs_x000_added_0_copies            4aa4e1f8e19a 359343b9ac0e :      1 revs,   0.000049 s,   0.000048 s,  -0.000001 s, × 0.9796,    48 µs/rev
pypy            x_revs_x_added_x_copies               ac52eb7bbbb0 72e022663155 :      7 revs,   0.000112 s,   0.000114 s,  +0.000002 s, × 1.0179,    16 µs/rev
pypy            x_revs_x00_added_x_copies             c3b14617fbd7 ace7255d9a26 :      1 revs,   0.000323 s,   0.000319 s,  -0.000004 s, × 0.9876,   319 µs/rev
pypy            x_revs_x000_added_x000_copies         df6f7a526b60 a83dc6a2d56f :      6 revs,   0.010042 s,   0.012025 s,  +0.001983 s, × 1.1975,  2004 µs/rev
pypy            x000_revs_xx00_added_0_copies         89a76aede314 2f22446ff07e :   4785 revs,   0.049813 s,   0.050525 s,  +0.000712 s, × 1.0143,    10 µs/rev
pypy            x000_revs_x000_added_x_copies         8a3b5bfd266e 2c68e87c3efe :   6780 revs,   0.079937 s,   0.085713 s,  +0.005776 s, × 1.0723,    12 µs/rev
pypy            x000_revs_x000_added_x000_copies      89a76aede314 7b3dda341c84 :   5441 revs,   0.059412 s,   0.061825 s,  +0.002413 s, × 1.0406,    11 µs/rev
pypy            x0000_revs_x_added_0_copies           d1defd0dc478 c9cb1334cc78 :  43645 revs,   0.533769 s,   0.543998 s,  +0.010229 s, × 1.0192,    12 µs/rev
pypy            x0000_revs_xx000_added_0_copies       bf2c629d0071 4ffed77c095c :      2 revs,   0.013147 s,   0.013455 s,  +0.000308 s, × 1.0234,  6727 µs/rev
pypy            x0000_revs_xx000_added_x000_copies    08ea3258278e d9fa043f30c0 :  11316 revs,   0.110680 s,   0.117479 s,  +0.006799 s, × 1.0614,    10 µs/rev
netbeans        x_revs_x_added_0_copies               fb0955ffcbcd a01e9239f9e7 :      2 revs,   0.000085 s,   0.000084 s,  -0.000001 s, × 0.9882,    42 µs/rev
netbeans        x_revs_x000_added_0_copies            6f360122949f 20eb231cc7d0 :      2 revs,   0.000107 s,   0.000111 s,  +0.000004 s, × 1.0374,    55 µs/rev
netbeans        x_revs_x_added_x_copies               1ada3faf6fb6 5a39d12eecf4 :      3 revs,   0.000175 s,   0.000175 s,  +0.000000 s, × 1.0000,    58 µs/rev
netbeans        x_revs_x00_added_x_copies             35be93ba1e2c 9eec5e90c05f :      9 revs,   0.000720 s,   0.000732 s,  +0.000012 s, × 1.0167,    81 µs/rev
netbeans        x000_revs_xx00_added_0_copies         eac3045b4fdd 51d4ae7f1290 :   1421 revs,   0.010019 s,   0.010062 s,  +0.000043 s, × 1.0043,     7 µs/rev
netbeans        x000_revs_x000_added_x_copies         e2063d266acd 6081d72689dc :   1533 revs,   0.015602 s,   0.015659 s,  +0.000057 s, × 1.0037,    10 µs/rev
netbeans        x000_revs_x000_added_x000_copies      ff453e9fee32 411350406ec2 :   5750 revs,   0.058759 s,   0.062744 s,  +0.003985 s, × 1.0678,    10 µs/rev
netbeans        x0000_revs_xx000_added_x000_copies    588c2d1ced70 1aad62e59ddd :  66949 revs,   0.491550 s,   0.499449 s,  +0.007899 s, × 1.0161,     7 µs/rev
mozilla-central x_revs_x_added_0_copies               3697f962bb7b 7015fcdd43a2 :      2 revs,   0.000087 s,   0.000088 s,  +0.000001 s, × 1.0115,    44 µs/rev
mozilla-central x_revs_x000_added_0_copies            dd390860c6c9 40d0c5bed75d :      8 revs,   0.000268 s,   0.000266 s,  -0.000002 s, × 0.9925,    33 µs/rev
mozilla-central x_revs_x_added_x_copies               8d198483ae3b 14207ffc2b2f :      9 revs,   0.000181 s,   0.000182 s,  +0.000001 s, × 1.0055,    20 µs/rev
mozilla-central x_revs_x00_added_x_copies             98cbc58cc6bc 446a150332c3 :      7 revs,   0.000661 s,   0.000656 s,  -0.000005 s, × 0.9924,    93 µs/rev
mozilla-central x_revs_x000_added_x000_copies         3c684b4b8f68 0a5e72d1b479 :      3 revs,   0.003256 s,   0.003389 s,  +0.000133 s, × 1.0408,  1129 µs/rev
mozilla-central x_revs_x0000_added_x0000_copies       effb563bb7e5 c07a39dc4e80 :      6 revs,   0.066749 s,   0.075882 s,  +0.009133 s, × 1.1368, 12647 µs/rev
mozilla-central x000_revs_xx00_added_0_copies         6100d773079a 04a55431795e :   1593 revs,   0.006462 s,   0.006479 s,  +0.000017 s, × 1.0026,     4 µs/rev
mozilla-central x000_revs_x000_added_x_copies         9f17a6fc04f9 2d37b966abed :     41 revs,   0.004919 s,   0.004889 s,  -0.000030 s, × 0.9939,   119 µs/rev
mozilla-central x000_revs_x000_added_x000_copies      7c97034feb78 4407bd0c6330 :   7839 revs,   0.062421 s,   0.064394 s,  +0.001973 s, × 1.0316,     8 µs/rev
mozilla-central x0000_revs_xx000_added_0_copies       9eec5917337d 67118cc6dcad :    615 revs,   0.026633 s,   0.026815 s,  +0.000182 s, × 1.0068,    43 µs/rev
mozilla-central x0000_revs_xx000_added_x000_copies    f78c615a656c 96a38b690156 :  30263 revs,   0.197792 s,   0.cc85eb s,  +0.005072 s, × 1.0256,     6 µs/rev
mozilla-central x00000_revs_x0000_added_x0000_copies  6832ae71433c 4c222a1d9a00 : 153721 revs,   1.259970 s,   1.219445 s,  -0.040525 s, × 0.9678,     7 µs/rev
mozilla-central x00000_revs_x00000_added_x000_copies  76caed42cf7c 1daa622bbe42 : 204976 revs,   1.689184 s,   1.613857 s,  -0.075327 s, × 0.9554,     7 µs/rev
mozilla-try     x_revs_x_added_0_copies               aaf6dde0deb8 9790f499805a :      2 revs,   0.000865 s,   0.000873 s,  +0.000008 s, × 1.0092,   436 µs/rev
mozilla-try     x_revs_x000_added_0_copies            d8d0222927b4 5bb8ce8c7450 :      2 revs,   0.000893 s,   0.000885 s,  -0.000008 s, × 0.9910,   442 µs/rev
mozilla-try     x_revs_x_added_x_copies               092fcca11bdb 936255a0384a :      4 revs,   0.000172 s,   0.000161 s,  -0.000011 s, × 0.9360,    40 µs/rev
mozilla-try     x_revs_x00_added_x_copies             b53d2fadbdb5 017afae788ec :      2 revs,   0.001159 s,   0.001138 s,  -0.000021 s, × 0.9819,   569 µs/rev
mozilla-try     x_revs_x000_added_x000_copies         20408ad61ce5 6f0ee96e21ad :      1 revs,   0.031621 s,   0.033399 s,  +0.001778 s, × 1.0562, 33399 µs/rev
mozilla-try     x_revs_x0000_added_x0000_copies       effb563bb7e5 c07a39dc4e80 :      6 revs,   0.068571 s,   0.075445 s,  +0.006874 s, × 1.1002, 12574 µs/rev
mozilla-try     x000_revs_xx00_added_0_copies         6100d773079a 04a55431795e :   1593 revs,   0.006452 s,   0.006456 s,  +0.000004 s, × 1.0006,     4 µs/rev
mozilla-try     x000_revs_x000_added_x_copies         9f17a6fc04f9 2d37b966abed :     41 revs,   0.005443 s,   0.005462 s,  +0.000019 s, × 1.0035,   133 µs/rev
mozilla-try     x000_revs_x000_added_x000_copies      1346fd0130e4 4c65cbdabc1f :   6657 revs,   0.063180 s,   0.064117 s,  +0.000937 s, × 1.0148,     9 µs/rev
mozilla-try     x0000_revs_x_added_0_copies           63519bfd42ee a36a2a865d92 :  40314 revs,   0.293564 s,   0.297563 s,  +0.003999 s, × 1.0136,     7 µs/rev
mozilla-try     x0000_revs_x_added_x_copies           9fe69ff0762d bcabf2a78927 :  38690 revs,   0.286595 s,   0.282463 s,  -0.004132 s, × 0.9856,     7 µs/rev
mozilla-try     x0000_revs_xx000_added_x_copies       156f6e2674f2 4d0f2c178e66 :   8598 revs,   0.083256 s,   0.084038 s,  +0.000782 s, × 1.0094,     9 µs/rev
mozilla-try     x0000_revs_xx000_added_0_copies       9eec5917337d 67118cc6dcad :    615 revs,   0.027282 s,   0.027306 s,  +0.000024 s, × 1.0009,    44 µs/rev
mozilla-try     x0000_revs_xx000_added_x000_copies    89294cd501d9 7ccb2fc7ccb5 :  97052 revs,   1.343373 s,   1.465264 s,  +0.121891 s, × 1.0907,    15 µs/rev
mozilla-try     x0000_revs_x0000_added_x0000_copies   e928c65095ed e951f4ad123a :  52031 revs,   0.665737 s,   0.690376 s,  +0.024639 s, × 1.0370,    13 µs/rev
mozilla-try     x00000_revs_x_added_0_copies          6a320851d377 1ebb79acd503 : 363753 revs,   5.138169 s,   4.011322 s,  -1.126847 s, × 0.7807,    11 µs/rev
mozilla-try     x00000_revs_x00000_added_0_copies     dc8a3ca7010e d16fde900c9c :  34414 revs,   0.573276 s,   0.573541 s,  +0.000265 s, × 1.0005,    16 µs/rev
mozilla-try     x00000_revs_x_added_x_copies          5173c4b6f97c 95d83ee7242d : 362229 revs,   5.127809 s,   3.981133 s,  -1.146676 s, × 0.7764,    10 µs/rev
mozilla-try     x00000_revs_x000_added_x_copies       9126823d0e9c ca82787bb23c : 359344 revs,   4.971136 s,   3.996647 s,  -0.974489 s, × 0.8040,    11 µs/rev
mozilla-try     x00000_revs_x0000_added_x0000_copies  8d3fafa80d4b eb884023b810 : 192665 revs,   1.741678 s,   1.520607 s,  -0.221071 s, × 0.8731,     7 µs/rev
mozilla-try     x00000_revs_x00000_added_x0000_copies 1b661134e2ca 1ae03d022d6d : 228985 revs,  40.314822 s,  50.244975 s,  +9.930153 s, × 1.2463,   219 µs/rev
mozilla-try     x00000_revs_x00000_added_x000_copies  9b2a99adc05e 8e29777b48e6 : 382065 revs,  20.048029 s,  20.030023 s,  -0.018006 s, × 0.9991,    52 µs/rev
private                                                                         : 459513 revs,  37.179470 s,  24.490825 s, -12.688645 s, × 0.6587,    53 µs/rev

### Compared to the filelog based copy tracing

Repo            Case                                  Source-Rev   Dest-Rev      # of revisions  old time    new time      Difference    Factor    time per rev
---------------------------------------------------------------------------------------------------------------------------------------------------------------
mercurial       x_revs_x_added_0_copies               ad6b123de1c7 39cfcef4f463 :      1 revs,  0.000918 s,  0.000041 s,  -0.000877 s, × 0.044662,    40 µs/rev
mercurial       x_revs_x_added_x_copies               2b1c78674230 0c1d10351869 :      6 revs,  0.001853 s,  0.000116 s,  -0.001737 s, × 0.062601,    19 µs/rev
mercurial       x000_revs_x000_added_x_copies         81f8ff2a9bf2 dd3267698d84 :   1032 revs,  0.018994 s,  0.004933 s,  -0.014061 s, × 0.259714,     4 µs/rev
pypy            x_revs_x_added_0_copies               aed021ee8ae8 099ed31b181b :      9 revs,  0.001532 s,  0.000193 s,  -0.001339 s, × 0.125979,    21 µs/rev
pypy            x_revs_x000_added_0_copies            4aa4e1f8e19a 359343b9ac0e :      1 revs,  0.210633 s,  0.000048 s,  -0.210585 s, × 0.000228,    47 µs/rev
pypy            x_revs_x_added_x_copies               ac52eb7bbbb0 72e022663155 :      7 revs,  0.017041 s,  0.000114 s,  -0.016927 s, × 0.006690,    16 µs/rev
pypy            x_revs_x00_added_x_copies             c3b14617fbd7 ace7255d9a26 :      1 revs,  0.019474 s,  0.000319 s,  -0.019155 s, × 0.016381,   318 µs/rev
pypy            x_revs_x000_added_x000_copies         df6f7a526b60 a83dc6a2d56f :      6 revs,  0.763136 s,  0.012025 s,  -0.751111 s, × 0.015757,  2003 µs/rev
pypy            x000_revs_xx00_added_0_copies         89a76aede314 2f22446ff07e :   4785 revs,  1.226569 s,  0.050525 s,  -1.176044 s, × 0.041192,    10 µs/rev
pypy            x000_revs_x000_added_x_copies         8a3b5bfd266e 2c68e87c3efe :   6780 revs,  1.314572 s,  0.085713 s,  -1.228859 s, × 0.065202,    12 µs/rev
pypy            x000_revs_x000_added_x000_copies      89a76aede314 7b3dda341c84 :   5441 revs,  1.686022 s,  0.061825 s,  -1.624197 s, × 0.036669,    11 µs/rev
pypy            x0000_revs_x_added_0_copies           d1defd0dc478 c9cb1334cc78 :  43645 revs,  0.001110 s,  0.543998 s,  +0.542888 s, × 490.0882,    12 µs/rev
pypy            x0000_revs_xx000_added_0_copies       bf2c629d0071 4ffed77c095c :      2 revs,  1.106265 s,  0.013455 s,  -1.092810 s, × 0.012163,  6724 µs/rev
pypy            x0000_revs_xx000_added_x000_copies    08ea3258278e d9fa043f30c0 :  11316 revs,  1.377398 s,  0.117479 s,  -1.259919 s, × 0.085291,    10 µs/rev
netbeans        x_revs_x_added_0_copies               fb0955ffcbcd a01e9239f9e7 :      2 revs,  0.028579 s,  0.000084 s,  -0.028495 s, × 0.002939,    41 µs/rev
netbeans        x_revs_x000_added_0_copies            6f360122949f 20eb231cc7d0 :      2 revs,  0.133644 s,  0.000111 s,  -0.133533 s, × 0.000831,    55 µs/rev
netbeans        x_revs_x_added_x_copies               1ada3faf6fb6 5a39d12eecf4 :      3 revs,  0.025988 s,  0.000175 s,  -0.025813 s, × 0.006734,    58 µs/rev
netbeans        x_revs_x00_added_x_copies             35be93ba1e2c 9eec5e90c05f :      9 revs,  0.053011 s,  0.000732 s,  -0.052279 s, × 0.013808,    81 µs/rev
netbeans        x000_revs_xx00_added_0_copies         eac3045b4fdd 51d4ae7f1290 :   1421 revs,  0.037858 s,  0.010062 s,  -0.027796 s, × 0.265783,     7 µs/rev
netbeans        x000_revs_x000_added_x_copies         e2063d266acd 6081d72689dc :   1533 revs,  0.200517 s,  0.015659 s,  -0.184858 s, × 0.078093,    10 µs/rev
netbeans        x000_revs_x000_added_x000_copies      ff453e9fee32 411350406ec2 :   5750 revs,  0.964542 s,  0.062744 s,  -0.901798 s, × 0.065051,    10 µs/rev
netbeans        x0000_revs_xx000_added_x000_copies    588c2d1ced70 1aad62e59ddd :  66949 revs,  3.976210 s,  0.499449 s,  -3.476761 s, × 0.125609,     7 µs/rev
mozilla-central x_revs_x_added_0_copies               3697f962bb7b 7015fcdd43a2 :      2 revs,  0.025172 s,  0.000088 s,  -0.025084 s, × 0.003496,    43 µs/rev
mozilla-central x_revs_x000_added_0_copies            dd390860c6c9 40d0c5bed75d :      8 revs,  0.145144 s,  0.000266 s,  -0.144878 s, × 0.001833,    33 µs/rev
mozilla-central x_revs_x_added_x_copies               8d198483ae3b 14207ffc2b2f :      9 revs,  0.026139 s,  0.000182 s,  -0.025957 s, × 0.006963,    20 µs/rev
mozilla-central x_revs_x00_added_x_copies             98cbc58cc6bc 446a150332c3 :      7 revs,  0.086184 s,  0.000656 s,  -0.085528 s, × 0.007612,    93 µs/rev
mozilla-central x_revs_x000_added_x000_copies         3c684b4b8f68 0a5e72d1b479 :      3 revs,  0.203187 s,  0.003389 s,  -0.199798 s, × 0.016679,  1129 µs/rev
mozilla-central x_revs_x0000_added_x0000_copies       effb563bb7e5 c07a39dc4e80 :      6 revs,  2.255675 s,  0.075882 s,  -2.179793 s, × 0.033640, 12644 µs/rev
mozilla-central x000_revs_xx00_added_0_copies         6100d773079a 04a55431795e :   1593 revs,  0.091147 s,  0.006479 s,  -0.084668 s, × 0.071083,     4 µs/rev
mozilla-central x000_revs_x000_added_x_copies         9f17a6fc04f9 2d37b966abed :     41 revs,  0.767530 s,  0.004889 s,  -0.762641 s, × 0.006370,   119 µs/rev
mozilla-central x000_revs_x000_added_x000_copies      7c97034feb78 4407bd0c6330 :   7839 revs,  1.185330 s,  0.064394 s,  -1.120936 s, × 0.054326,     8 µs/rev
mozilla-central x0000_revs_xx000_added_0_copies       9eec5917337d 67118cc6dcad :    615 revs,  6.831179 s,  0.026815 s,  -6.804364 s, × 0.003925,    43 µs/rev
mozilla-central x0000_revs_xx000_added_x000_copies    f78c615a656c 96a38b690156 :  30263 revs,  3.373551 s,  0.cc85eb s,  -3.170687 s, × 0.060134,     6 µs/rev
mozilla-central x00000_revs_x0000_added_x0000_copies  6832ae71433c 4c222a1d9a00 : 153721 revs, 16.540604 s,  1.219445 s, -15.321159 s, × 0.073724,     7 µs/rev
mozilla-central x00000_revs_x00000_added_x000_copies  76caed42cf7c 1daa622bbe42 : 204976 revs, 21.527155 s,  1.613857 s, -19.913298 s, × 0.074968,     7 µs/rev
mozilla-try     x_revs_x_added_0_copies               aaf6dde0deb8 9790f499805a :      2 revs,  0.084540 s,  0.000873 s,  -0.083667 s, × 0.010326,   436 µs/rev
mozilla-try     x_revs_x000_added_0_copies            d8d0222927b4 5bb8ce8c7450 :      2 revs,  0.507151 s,  0.000885 s,  -0.506266 s, × 0.001745,   442 µs/rev
mozilla-try     x_revs_x_added_x_copies               092fcca11bdb 936255a0384a :      4 revs,  0.021748 s,  0.000161 s,  -0.021587 s, × 0.007403,    40 µs/rev
mozilla-try     x_revs_x00_added_x_copies             b53d2fadbdb5 017afae788ec :      2 revs,  0.236786 s,  0.001138 s,  -0.235648 s, × 0.004806,   568 µs/rev
mozilla-try     x_revs_x000_added_x000_copies         20408ad61ce5 6f0ee96e21ad :      1 revs,  1.111735 s,  0.033399 s,  -1.078336 s, × 0.030042, 33365 µs/rev
mozilla-try     x_revs_x0000_added_x0000_copies       effb563bb7e5 c07a39dc4e80 :      6 revs,  2.228030 s,  0.075445 s,  -2.152585 s, × 0.033862, 12572 µs/rev
mozilla-try     x000_revs_xx00_added_0_copies         6100d773079a 04a55431795e :   1593 revs,  0.091289 s,  0.006456 s,  -0.084833 s, × 0.070720,     4 µs/rev
mozilla-try     x000_revs_x000_added_x_copies         9f17a6fc04f9 2d37b966abed :     41 revs,  0.771361 s,  0.005462 s,  -0.765899 s, × 0.007081,   133 µs/rev
mozilla-try     x000_revs_x000_added_x000_copies      1346fd0130e4 4c65cbdabc1f :   6657 revs,  1.189483 s,  0.064117 s,  -1.125366 s, × 0.053903,     9 µs/rev
mozilla-try     x0000_revs_x_added_0_copies           63519bfd42ee a36a2a865d92 :  40314 revs,  0.089756 s,  0.297563 s,  +0.207807 s, × 3.315244,     7 µs/rev
mozilla-try     x0000_revs_x_added_x_copies           9fe69ff0762d bcabf2a78927 :  38690 revs,  0.084888 s,  0.282463 s,  +0.197575 s, × 3.327479,     7 µs/rev
mozilla-try     x0000_revs_xx000_added_x_copies       156f6e2674f2 4d0f2c178e66 :   8598 revs,  7.682665 s,  0.084038 s,  -7.598627 s, × 0.010939,     9 µs/rev
mozilla-try     x0000_revs_xx000_added_0_copies       9eec5917337d 67118cc6dcad :    615 revs,  6.894680 s,  0.027306 s,  -6.867374 s, × 0.003960,    44 µs/rev
mozilla-try     x0000_revs_xx000_added_x000_copies    89294cd501d9 7ccb2fc7ccb5 :  97052 revs,  7.650907 s,  1.465264 s,  -6.185643 s, × 0.191515,    15 µs/rev
mozilla-try     x0000_revs_x0000_added_x0000_copies   e928c65095ed e951f4ad123a :  52031 revs,  9.898788 s,  0.690376 s,  -9.208412 s, × 0.069743,    13 µs/rev
mozilla-try     x00000_revs_x_added_0_copies          6a320851d377 1ebb79acd503 : 363753 revs,  0.092208 s,  4.011322 s,  +3.919114 s, × 43.50297,    11 µs/rev
mozilla-try     x00000_revs_x00000_added_0_copies     dc8a3ca7010e d16fde900c9c :  34414 revs, 28.130003 s,  0.573541 s, -27.556462 s, × 0.020389,    16 µs/rev
mozilla-try     x00000_revs_x_added_x_copies          5173c4b6f97c 95d83ee7242d : 362229 revs,  0.093366 s,  3.981133 s,  +3.887767 s, × 42.64007,    10 µs/rev
mozilla-try     x00000_revs_x000_added_x_copies       9126823d0e9c ca82787bb23c : 359344 revs,  0.229368 s,  3.996647 s,  +3.767279 s, × 17.42460,    11 µs/rev
mozilla-try     x00000_revs_x0000_added_x0000_copies  8d3fafa80d4b eb884023b810 : 192665 revs, 19.624851 s,  1.520607 s, -18.104244 s, × 0.077484,     7 µs/rev
mozilla-try     x00000_revs_x00000_added_x0000_copies 1b661134e2ca 1ae03d022d6d : 228985 revs, 22.070126 s, 50.244975 s, +28.174849 s, × 2.276606,   219 µs/rev
mozilla-try     x00000_revs_x00000_added_x000_copies  9b2a99adc05e 8e29777b48e6 : 382065 revs, 26.006524 s, 20.030023 s,  -5.976501 s, × 0.770192,    52 µs/rev
private                                                                         : 459513 revs, 18.704612 s, 24.490825 s,  +5.786213 s, × 1.309347,    53 µs/rev

Differential Revision: https://phab.mercurial-scm.org/D9656

# Minimal support for git commands on an hg repository
#
# Copyright 2005, 2006 Chris Mason <[e-mail]>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.

'''browse the repository in a graphical way

The hgk extension allows browsing the history of a repository in a
graphical way. It requires Tcl/Tk version 8.4 or later. (Tcl/Tk is not
distributed with Mercurial.)

hgk consists of two parts: a Tcl script that does the displaying and
querying of information, and an extension to Mercurial named hgk.py,
which provides hooks for hgk to get information. hgk can be found in
the contrib directory, and the extension is shipped in the hgext
repository, and needs to be enabled.

The :hg:`view` command will launch the hgk Tcl script. For this command
to work, hgk must be in your search path. Alternately, you can specify
the path to hgk in your configuration file::

  [hgk]
  path = /location/of/hgk

hgk can make use of the extdiff extension to visualize revisions.
Assuming you had already configured extdiff vdiff command, just add::

  [hgk]
  vdiff=vdiff

Revisions context menu will now display additional entries to fire
vdiff on hovered and selected revisions.
'''

from __future__ import absolute_import

import os

from mercurial.i18n import _
from mercurial.node import (
    nullid,
    nullrev,
    short,
)
from mercurial import (
    commands,
    obsolete,
    patch,
    pycompat,
    registrar,
    scmutil,
)

cmdtable = {}
command = registrar.command(cmdtable)
# Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for
# extensions which SHIP WITH MERCURIAL. Non-mainline extensions should
# be specifying the version(s) of Mercurial they are tested with, or
# leave the attribute unspecified.
testedwith = b'ships-with-hg-core'

configtable = {}
configitem = registrar.configitem(configtable)

configitem(
    b'hgk',
    b'path',
    default=b'hgk',
)


@command(
    b'debug-diff-tree',
    [
        (b'p', b'patch', None, _(b'generate patch')),
        (b'r', b'recursive', None, _(b'recursive')),
        (b'P', b'pretty', None, _(b'pretty')),
        (b's', b'stdin', None, _(b'stdin')),
        (b'C', b'copy', None, _(b'detect copies')),
        (b'S', b'search', b"", _(b'search')),
    ],
    b'[OPTION]... NODE1 NODE2 [FILE]...',
    inferrepo=True,
)
def difftree(ui, repo, node1=None, node2=None, *files, **opts):
    """diff trees from two commits"""

    def __difftree(repo, node1, node2, files=None):
        assert node2 is not None
        if files is None:
            files = []
        mmap = repo[node1].manifest()
        mmap2 = repo[node2].manifest()
        m = scmutil.match(repo[node1], files)
        st = repo.status(node1, node2, m)
        empty = short(nullid)

        for f in st.modified:
            # TODO get file permissions
            ui.writenoi18n(
                b":100664 100664 %s %s M\t%s\t%s\n"
                % (short(mmap[f]), short(mmap2[f]), f, f)
            )
        for f in st.added:
            ui.writenoi18n(
                b":000000 100664 %s %s N\t%s\t%s\n"
                % (empty, short(mmap2[f]), f, f)
            )
        for f in st.removed:
            ui.writenoi18n(
                b":100664 000000 %s %s D\t%s\t%s\n"
                % (short(mmap[f]), empty, f, f)
            )

    ##

    while True:
        if opts['stdin']:
            line = ui.fin.readline()
            if not line:
                break
            line = line.rstrip(pycompat.oslinesep).split(b' ')
            node1 = line[0]
            if len(line) > 1:
                node2 = line[1]
            else:
                node2 = None
        node1 = repo.lookup(node1)
        if node2:
            node2 = repo.lookup(node2)
        else:
            node2 = node1
            node1 = repo.changelog.parents(node1)[0]
        if opts['patch']:
            if opts['pretty']:
                catcommit(ui, repo, node2, b"")
            m = scmutil.match(repo[node1], files)
            diffopts = patch.difffeatureopts(ui)
            diffopts.git = True
            chunks = patch.diff(repo, node1, node2, match=m, opts=diffopts)
            for chunk in chunks:
                ui.write(chunk)
        else:
            __difftree(repo, node1, node2, files=files)
        if not opts['stdin']:
            break


def catcommit(ui, repo, n, prefix, ctx=None):
    nlprefix = b'\n' + prefix
    if ctx is None:
        ctx = repo[n]
    # use ctx.node() instead ??
    ui.write((b"tree %s\n" % short(ctx.changeset()[0])))
    for p in ctx.parents():
        ui.write((b"parent %s\n" % p))

    date = ctx.date()
    description = ctx.description().replace(b"\0", b"")
    ui.write((b"author %s %d %d\n" % (ctx.user(), int(date[0]), date[1])))

    if b'committer' in ctx.extra():
        ui.write((b"committer %s\n" % ctx.extra()[b'committer']))

    ui.write((b"revision %d\n" % ctx.rev()))
    ui.write((b"branch %s\n" % ctx.branch()))
    if obsolete.isenabled(repo, obsolete.createmarkersopt):
        if ctx.obsolete():
            ui.writenoi18n(b"obsolete\n")
    ui.write((b"phase %s\n\n" % ctx.phasestr()))

    if prefix != b"":
        ui.write(
            b"%s%s\n" % (prefix, description.replace(b'\n', nlprefix).strip())
        )
    else:
        ui.write(description + b"\n")
    if prefix:
        ui.write(b'\0')


@command(b'debug-merge-base', [], _(b'REV REV'))
def base(ui, repo, node1, node2):
    """output common ancestor information"""
    node1 = repo.lookup(node1)
    node2 = repo.lookup(node2)
    n = repo.changelog.ancestor(node1, node2)
    ui.write(short(n) + b"\n")


@command(
    b'debug-cat-file',
    [(b's', b'stdin', None, _(b'stdin'))],
    _(b'[OPTION]... TYPE FILE'),
    inferrepo=True,
)
def catfile(ui, repo, type=None, r=None, **opts):
    """cat a specific revision"""
    # in stdin mode, every line except the commit is prefixed with two
    # spaces.  This way the our caller can find the commit without magic
    # strings
    #
    prefix = b""
    if opts['stdin']:
        line = ui.fin.readline()
        if not line:
            return
        (type, r) = line.rstrip(pycompat.oslinesep).split(b' ')
        prefix = b"    "
    else:
        if not type or not r:
            ui.warn(_(b"cat-file: type or revision not supplied\n"))
            commands.help_(ui, b'cat-file')

    while r:
        if type != b"commit":
            ui.warn(_(b"aborting hg cat-file only understands commits\n"))
            return 1
        n = repo.lookup(r)
        catcommit(ui, repo, n, prefix)
        if opts['stdin']:
            line = ui.fin.readline()
            if not line:
                break
            (type, r) = line.rstrip(pycompat.oslinesep).split(b' ')
        else:
            break


# git rev-tree is a confusing thing.  You can supply a number of
# commit sha1s on the command line, and it walks the commit history
# telling you which commits are reachable from the supplied ones via
# a bitmask based on arg position.
# you can specify a commit to stop at by starting the sha1 with ^
def revtree(ui, args, repo, full=b"tree", maxnr=0, parents=False):
    def chlogwalk():
        count = len(repo)
        i = count
        l = [0] * 100
        chunk = 100
        while True:
            if chunk > i:
                chunk = i
                i = 0
            else:
                i -= chunk

            for x in pycompat.xrange(chunk):
                if i + x >= count:
                    l[chunk - x :] = [0] * (chunk - x)
                    break
                if full is not None:
                    if (i + x) in repo:
                        l[x] = repo[i + x]
                        l[x].changeset()  # force reading
                else:
                    if (i + x) in repo:
                        l[x] = 1
            for x in pycompat.xrange(chunk - 1, -1, -1):
                if l[x] != 0:
                    yield (i + x, full is not None and l[x] or None)
            if i == 0:
                break

    # calculate and return the reachability bitmask for sha
    def is_reachable(ar, reachable, sha):
        if len(ar) == 0:
            return 1
        mask = 0
        for i in pycompat.xrange(len(ar)):
            if sha in reachable[i]:
                mask |= 1 << i

        return mask

    reachable = []
    stop_sha1 = []
    want_sha1 = []
    count = 0

    # figure out which commits they are asking for and which ones they
    # want us to stop on
    for i, arg in enumerate(args):
        if arg.startswith(b'^'):
            s = repo.lookup(arg[1:])
            stop_sha1.append(s)
            want_sha1.append(s)
        elif arg != b'HEAD':
            want_sha1.append(repo.lookup(arg))

    # calculate the graph for the supplied commits
    for i, n in enumerate(want_sha1):
        reachable.append(set())
        visit = [n]
        reachable[i].add(n)
        while visit:
            n = visit.pop(0)
            if n in stop_sha1:
                continue
            for p in repo.changelog.parents(n):
                if p not in reachable[i]:
                    reachable[i].add(p)
                    visit.append(p)
                if p in stop_sha1:
                    continue

    # walk the repository looking for commits that are in our
    # reachability graph
    for i, ctx in chlogwalk():
        if i not in repo:
            continue
        n = repo.changelog.node(i)
        mask = is_reachable(want_sha1, reachable, n)
        if mask:
            parentstr = b""
            if parents:
                pp = repo.changelog.parents(n)
                if pp[0] != nullid:
                    parentstr += b" " + short(pp[0])
                if pp[1] != nullid:
                    parentstr += b" " + short(pp[1])
            if not full:
                ui.write(b"%s%s\n" % (short(n), parentstr))
            elif full == b"commit":
                ui.write(b"%s%s\n" % (short(n), parentstr))
                catcommit(ui, repo, n, b'    ', ctx)
            else:
                (p1, p2) = repo.changelog.parents(n)
                (h, h1, h2) = map(short, (n, p1, p2))
                (i1, i2) = map(repo.changelog.rev, (p1, p2))

                date = ctx.date()[0]
                ui.write(b"%s %s:%s" % (date, h, mask))
                mask = is_reachable(want_sha1, reachable, p1)
                if i1 != nullrev and mask > 0:
                    ui.write(b"%s:%s " % (h1, mask)),
                mask = is_reachable(want_sha1, reachable, p2)
                if i2 != nullrev and mask > 0:
                    ui.write(b"%s:%s " % (h2, mask))
                ui.write(b"\n")
            if maxnr and count >= maxnr:
                break
            count += 1


# git rev-list tries to order things by date, and has the ability to stop
# at a given commit without walking the whole repo.  TODO add the stop
# parameter
@command(
    b'debug-rev-list',
    [
        (b'H', b'header', None, _(b'header')),
        (b't', b'topo-order', None, _(b'topo-order')),
        (b'p', b'parents', None, _(b'parents')),
        (b'n', b'max-count', 0, _(b'max-count')),
    ],
    b'[OPTION]... REV...',
)
def revlist(ui, repo, *revs, **opts):
    """print revisions"""
    if opts['header']:
        full = b"commit"
    else:
        full = None
    copy = [x for x in revs]
    revtree(ui, copy, repo, full, opts['max_count'], opts[r'parents'])


@command(
    b'view',
    [(b'l', b'limit', b'', _(b'limit number of changes displayed'), _(b'NUM'))],
    _(b'[-l LIMIT] [REVRANGE]'),
    helpcategory=command.CATEGORY_CHANGE_NAVIGATION,
)
def view(ui, repo, *etc, **opts):
    """start interactive history viewer"""
    opts = pycompat.byteskwargs(opts)
    os.chdir(repo.root)
    optstr = b' '.join(
        [b'--%s %s' % (k, v) for k, v in pycompat.iteritems(opts) if v]
    )
    if repo.filtername is None:
        optstr += b'--hidden'

    cmd = ui.config(b"hgk", b"path") + b" %s %s" % (optstr, b" ".join(etc))
    ui.debug(b"running %s\n" % cmd)
    ui.system(cmd, blockedtag=b'hgk_view')