Mercurial > hg
annotate mercurial/copies.py @ 45892:06b64fabf91c
copies: cache the ancestor checking call when tracing copy
A good share of the time spent in this function is spent doing ancestors
checking. To avoid spending time in duplicated call, we cache the result of
calls.
In the slower case, this provide a quite significant performance boost. Below
are the result for a set of selected pairs (many of them pathological):
(And further down is another table that summarize the current state of filelog
based vs changeset base copy tracing)
The benchmark have been configured to be killed after 6 minutes of runtime,
which mean that any detect slower than 2 minutes will be marked as "killed".
This drop some useful information about how much slower these case are… but also
prevent 99% of the benchmark time to be spent on case that can be labelled "very
slow" anyway.
Repo Case Source-Rev Dest-Rev Old-Time New-Time Difference Factor
------------------------------------------------------------------------------------------------------------------------------------
mercurial x_revs_x_added_0_copies ad6b123de1c7 39cfcef4f463 : 0.000044 s, 0.000044 s, +0.000000 s, × 1.0000
mercurial x_revs_x_added_x_copies 2b1c78674230 0c1d10351869 : 0.000138 s, 0.000138 s, +0.000000 s, × 1.0000
mercurial x000_revs_x000_added_x_copies 81f8ff2a9bf2 dd3267698d84 : 0.005067 s, 0.005052 s, -0.000015 s, × 0.9970
pypy x_revs_x_added_0_copies aed021ee8ae8 099ed31b181b : 0.000218 s, 0.000219 s, +0.000001 s, × 1.0046
pypy x_revs_x000_added_0_copies 4aa4e1f8e19a 359343b9ac0e : 0.000053 s, 0.000055 s, +0.000002 s, × 1.0377
pypy x_revs_x_added_x_copies ac52eb7bbbb0 72e022663155 : 0.000125 s, 0.000128 s, +0.000003 s, × 1.0240
pypy x_revs_x00_added_x_copies c3b14617fbd7 ace7255d9a26 : 0.001098 s, 0.001089 s, -0.000009 s, × 0.9918
pypy x_revs_x000_added_x000_copies df6f7a526b60 a83dc6a2d56f : 0.017546 s, 0.017407 s, -0.000139 s, × 0.9921
pypy x000_revs_xx00_added_0_copies 89a76aede314 2f22446ff07e : 0.096723 s, 0.094175 s, -0.002548 s, × 0.9737
pypy x000_revs_x000_added_x_copies 8a3b5bfd266e 2c68e87c3efe : 0.271796 s, 0.238009 s, -0.033787 s, × 0.8757
pypy x000_revs_x000_added_x000_copies 89a76aede314 7b3dda341c84 : 0.128602 s, 0.125876 s, -0.002726 s, × 0.9788
pypy x0000_revs_x_added_0_copies d1defd0dc478 c9cb1334cc78 : 7.086742 s, 3.581556 s, -3.505186 s, × 0.5054
pypy x0000_revs_xx000_added_0_copies bf2c629d0071 4ffed77c095c : 0.016634 s, 0.016721 s, +0.000087 s, × 1.0052
pypy x0000_revs_xx000_added_x000_copies 08ea3258278e d9fa043f30c0 : 0.254225 s, 0.242367 s, -0.011858 s, × 0.9534
netbeans x_revs_x_added_0_copies fb0955ffcbcd a01e9239f9e7 : 0.000166 s, 0.000165 s, -0.000001 s, × 0.9940
netbeans x_revs_x000_added_0_copies 6f360122949f 20eb231cc7d0 : 0.000118 s, 0.000114 s, -0.000004 s, × 0.9661
netbeans x_revs_x_added_x_copies 1ada3faf6fb6 5a39d12eecf4 : 0.000296 s, 0.000296 s, +0.000000 s, × 1.0000
netbeans x_revs_x00_added_x_copies 35be93ba1e2c 9eec5e90c05f : 0.001137 s, 0.001124 s, -0.000013 s, × 0.9886
netbeans x000_revs_xx00_added_0_copies eac3045b4fdd 51d4ae7f1290 : 0.014133 s, 0.013060 s, -0.001073 s, × 0.9241
netbeans x000_revs_x000_added_x_copies e2063d266acd 6081d72689dc : 0.016988 s, 0.017112 s, +0.000124 s, × 1.0073
netbeans x000_revs_x000_added_x000_copies ff453e9fee32 411350406ec2 : 0.676361 s, 0.660350 s, -0.016011 s, × 0.9763
netbeans x0000_revs_xx000_added_x000_copies 588c2d1ced70 1aad62e59ddd : 12.515149 s, 10.032499 s, -2.482650 s, × 0.8016
mozilla-central x_revs_x_added_0_copies 3697f962bb7b 7015fcdd43a2 : 0.000186 s, 0.000189 s, +0.000003 s, × 1.0161
mozilla-central x_revs_x000_added_0_copies dd390860c6c9 40d0c5bed75d : 0.000459 s, 0.000462 s, +0.000003 s, × 1.0065
mozilla-central x_revs_x_added_x_copies 8d198483ae3b 14207ffc2b2f : 0.000273 s, 0.000270 s, -0.000003 s, × 0.9890
mozilla-central x_revs_x00_added_x_copies 98cbc58cc6bc 446a150332c3 : 0.001503 s, 0.001474 s, -0.000029 s, × 0.9807
mozilla-central x_revs_x000_added_x000_copies 3c684b4b8f68 0a5e72d1b479 : 0.004862 s, 0.004806 s, -0.000056 s, × 0.9885
mozilla-central x_revs_x0000_added_x0000_copies effb563bb7e5 c07a39dc4e80 : 0.088291 s, 0.085150 s, -0.003141 s, × 0.9644
mozilla-central x000_revs_xx00_added_0_copies 6100d773079a 04a55431795e : 0.007113 s, 0.007064 s, -0.000049 s, × 0.9931
mozilla-central x000_revs_x000_added_x_copies 9f17a6fc04f9 2d37b966abed : 0.004687 s, 0.004741 s, +0.000054 s, × 1.0115
mozilla-central x000_revs_x000_added_x000_copies 7c97034feb78 4407bd0c6330 : 0.198710 s, 0.190133 s, -0.008577 s, × 0.9568
mozilla-central x0000_revs_xx000_added_0_copies 9eec5917337d 67118cc6dcad : 0.036068 s, 0.035651 s, -0.000417 s, × 0.9884
mozilla-central x0000_revs_xx000_added_x000_copies f78c615a656c 96a38b690156 : 0.465362 s, 0.440694 s, -0.024668 s, × 0.9470
mozilla-central x00000_revs_x0000_added_x0000_copies 6832ae71433c 4c222a1d9a00 : 24.519684 s, 18.454163 s, -6.065521 s, × 0.7526
mozilla-central x00000_revs_x00000_added_x000_copies 76caed42cf7c 1daa622bbe42 : 42.711897 s, 31.562719 s, -11.149178 s, × 0.7390
mozilla-try x_revs_x_added_0_copies aaf6dde0deb8 9790f499805a : 0.001201 s, 0.001189 s, -0.000012 s, × 0.9900
mozilla-try x_revs_x000_added_0_copies d8d0222927b4 5bb8ce8c7450 : 0.001216 s, 0.001204 s, -0.000012 s, × 0.9901
mozilla-try x_revs_x_added_x_copies 092fcca11bdb 936255a0384a : 0.000595 s, 0.000586 s, -0.000009 s, × 0.9849
mozilla-try x_revs_x00_added_x_copies b53d2fadbdb5 017afae788ec : 0.001856 s, 0.001845 s, -0.000011 s, × 0.9941
mozilla-try x_revs_x000_added_x000_copies 20408ad61ce5 6f0ee96e21ad : 0.064936 s, 0.063822 s, -0.001114 s, × 0.9828
mozilla-try x_revs_x0000_added_x0000_copies effb563bb7e5 c07a39dc4e80 : 0.090601 s, 0.088038 s, -0.002563 s, × 0.9717
mozilla-try x000_revs_xx00_added_0_copies 6100d773079a 04a55431795e : 0.007510 s, 0.007389 s, -0.000121 s, × 0.9839
mozilla-try x000_revs_x000_added_x_copies 9f17a6fc04f9 2d37b966abed : 0.004911 s, 0.004868 s, -0.000043 s, × 0.9912
mozilla-try x000_revs_x000_added_x000_copies 1346fd0130e4 4c65cbdabc1f : 0.233231 s, 0.222450 s, -0.010781 s, × 0.9538
mozilla-try x0000_revs_x_added_0_copies 63519bfd42ee a36a2a865d92 : 0.419989 s, 0.370675 s, -0.049314 s, × 0.8826
mozilla-try x0000_revs_x_added_x_copies 9fe69ff0762d bcabf2a78927 : 0.401521 s, 0.358020 s, -0.043501 s, × 0.8917
mozilla-try x0000_revs_xx000_added_x_copies 156f6e2674f2 4d0f2c178e66 : 0.179555 s, 0.145235 s, -0.034320 s, × 0.8089
mozilla-try x0000_revs_xx000_added_0_copies 9eec5917337d 67118cc6dcad : 0.038004 s, 0.037606 s, -0.000398 s, × 0.9895
mozilla-try x0000_revs_xx000_added_x000_copies 89294cd501d9 7ccb2fc7ccb5 : 52.838482 s, 7.382439 s, -45.456043 s, × 0.1397
mozilla-try x0000_revs_x0000_added_x0000_copies e928c65095ed e951f4ad123a : 8.705874 s, 7.273506 s, -1.432368 s, × 0.8355
mozilla-try x00000_revs_x00000_added_0_copies dc8a3ca7010e d16fde900c9c : 1.126708 s, 1.074593 s, -0.052115 s, × 0.9537
mozilla-try x00000_revs_x0000_added_x0000_copies 8d3fafa80d4b eb884023b810 : 83.854020 s, 27.746195 s, -56.107825 s, × 0.3309
Below is a table comparing the runtime of the current "filelog centric"
algorithm, with the "changeset centric" one, we just modified.
The changeset centric algorithm is a significant win in many scenario, but they
are still various cases where it is quite slower. When many revision has to be
considered the cost of retrieving the copy information, creating new
dictionaries, merging dictionaries and checking if revision are ancestors of
each other can slow things down.
The rest of this series, will introduce a rust version of the copy tracing code
to deal with most of theses issues.
Repo Case Source-Rev Dest-Rev filelog sidedata Difference Factor
---------------------------------------------------------------------------------------------------------------------------------------
mercurial x_revs_x_added_0_copies ad6b123de1c7 39cfcef4f463 : 0.000914 s, 0.000044 s, - 0.000870 s, × 0.048140
mercurial x_revs_x_added_x_copies 2b1c78674230 0c1d10351869 : 0.001812 s, 0.000138 s, - 0.001674 s, × 0.076159
mercurial x000_revs_x000_added_x_copies 81f8ff2a9bf2 dd3267698d84 : 0.017954 s, 0.005052 s, - 0.012902 s, × 0.281386
pypy x_revs_x_added_0_copies aed021ee8ae8 099ed31b181b : 0.001509 s, 0.000219 s, - 0.001290 s, × 0.145129
pypy x_revs_x000_added_0_copies 4aa4e1f8e19a 359343b9ac0e : 0.206881 s, 0.000055 s, - 0.206826 s, × 0.000266
pypy x_revs_x_added_x_copies ac52eb7bbbb0 72e022663155 : 0.016951 s, 0.000128 s, - 0.016823 s, × 0.007551
pypy x_revs_x00_added_x_copies c3b14617fbd7 ace7255d9a26 : 0.019096 s, 0.001089 s, - 0.018007 s, × 0.057028
pypy x_revs_x000_added_x000_copies df6f7a526b60 a83dc6a2d56f : 0.762506 s, 0.017407 s, - 0.745099 s, × 0.022829
pypy x000_revs_xx00_added_0_copies 89a76aede314 2f22446ff07e : 1.179211 s, 0.094175 s, - 1.085036 s, × 0.079863
pypy x000_revs_x000_added_x_copies 8a3b5bfd266e 2c68e87c3efe : 1.249058 s, 0.238009 s, - 1.011049 s, × 0.190551
pypy x000_revs_x000_added_x000_copies 89a76aede314 7b3dda341c84 : 1.614107 s, 0.125876 s, - 1.488231 s, × 0.077985
pypy x0000_revs_x_added_0_copies d1defd0dc478 c9cb1334cc78 : 0.001064 s, 3.581556 s, + 3.580492 s, × 3366.124060
pypy x0000_revs_xx000_added_0_copies bf2c629d0071 4ffed77c095c : 1.061275 s, 0.016721 s, - 1.044554 s, × 0.015756
pypy x0000_revs_xx000_added_x000_copies 08ea3258278e d9fa043f30c0 : 1.341119 s, 0.242367 s, - 1.098752 s, × 0.180720
netbeans x_revs_x_added_0_copies fb0955ffcbcd a01e9239f9e7 : 0.027803 s, 0.000165 s, - 0.027638 s, × 0.005935
netbeans x_revs_x000_added_0_copies 6f360122949f 20eb231cc7d0 : 0.130014 s, 0.000114 s, - 0.129900 s, × 0.000877
netbeans x_revs_x_added_x_copies 1ada3faf6fb6 5a39d12eecf4 : 0.024990 s, 0.000296 s, - 0.024694 s, × 0.011845
netbeans x_revs_x00_added_x_copies 35be93ba1e2c 9eec5e90c05f : 0.052201 s, 0.001124 s, - 0.051077 s, × 0.021532
netbeans x000_revs_xx00_added_0_copies eac3045b4fdd 51d4ae7f1290 : 0.037642 s, 0.013060 s, - 0.024582 s, × 0.346953
netbeans x000_revs_x000_added_x_copies e2063d266acd 6081d72689dc : 0.197086 s, 0.017112 s, - 0.179974 s, × 0.086825
netbeans x000_revs_x000_added_x000_copies ff453e9fee32 411350406ec2 : 0.935148 s, 0.660350 s, - 0.274798 s, × 0.706145
netbeans x0000_revs_xx000_added_x000_copies 588c2d1ced70 1aad62e59ddd : 3.920674 s, 10.032499 s, + 6.111825 s, × 2.558871
mozilla-central x_revs_x_added_0_copies 3697f962bb7b 7015fcdd43a2 : 0.024232 s, 0.000189 s, - 0.024043 s, × 0.007800
mozilla-central x_revs_x000_added_0_copies dd390860c6c9 40d0c5bed75d : 0.141483 s, 0.000462 s, - 0.141021 s, × 0.003265
mozilla-central x_revs_x_added_x_copies 8d198483ae3b 14207ffc2b2f : 0.025775 s, 0.000270 s, - 0.025505 s, × 0.010475
mozilla-central x_revs_x00_added_x_copies 98cbc58cc6bc 446a150332c3 : 0.084922 s, 0.001474 s, - 0.083448 s, × 0.017357
mozilla-central x_revs_x000_added_x000_copies 3c684b4b8f68 0a5e72d1b479 : 0.194784 s, 0.004806 s, - 0.189978 s, × 0.024673
mozilla-central x_revs_x0000_added_x0000_copies effb563bb7e5 c07a39dc4e80 : 2.161103 s, 0.085150 s, - 2.075953 s, × 0.039401
mozilla-central x000_revs_xx00_added_0_copies 6100d773079a 04a55431795e : 0.089347 s, 0.007064 s, - 0.082283 s, × 0.079063
mozilla-central x000_revs_x000_added_x_copies 9f17a6fc04f9 2d37b966abed : 0.732171 s, 0.004741 s, - 0.727430 s, × 0.006475
mozilla-central x000_revs_x000_added_x000_copies 7c97034feb78 4407bd0c6330 : 1.157287 s, 0.190133 s, - 0.967154 s, × 0.164292
mozilla-central x0000_revs_xx000_added_0_copies 9eec5917337d 67118cc6dcad : 6.726568 s, 0.035651 s, - 6.690917 s, × 0.005300
mozilla-central x0000_revs_xx000_added_x000_copies f78c615a656c 96a38b690156 : 3.266229 s, 0.440694 s, - 2.825535 s, × 0.134924
mozilla-central x00000_revs_x0000_added_x0000_copies 6832ae71433c 4c222a1d9a00 : 15.860534 s, 18.454163 s, + 2.593629 s, × 1.163527
mozilla-central x00000_revs_x00000_added_x000_copies 76caed42cf7c 1daa622bbe42 : 20.450475 s, 31.562719 s, +11.112244 s, × 1.543373
mozilla-try x_revs_x_added_0_copies aaf6dde0deb8 9790f499805a : 0.080442 s, 0.001189 s, - 0.079253 s, × 0.014781
mozilla-try x_revs_x000_added_0_copies d8d0222927b4 5bb8ce8c7450 : 0.497672 s, 0.001204 s, - 0.496468 s, × 0.002419
mozilla-try x_revs_x_added_x_copies 092fcca11bdb 936255a0384a : 0.021183 s, 0.000586 s, - 0.020597 s, × 0.027664
mozilla-try x_revs_x00_added_x_copies b53d2fadbdb5 017afae788ec : 0.230991 s, 0.001845 s, - 0.229146 s, × 0.007987
mozilla-try x_revs_x000_added_x000_copies 20408ad61ce5 6f0ee96e21ad : 1.118461 s, 0.063822 s, - 1.054639 s, × 0.057062
mozilla-try x_revs_x0000_added_x0000_copies effb563bb7e5 c07a39dc4e80 : 2.206083 s, 0.088038 s, - 2.118045 s, × 0.039907
mozilla-try x000_revs_xx00_added_0_copies 6100d773079a 04a55431795e : 0.089404 s, 0.007389 s, - 0.082015 s, × 0.082647
mozilla-try x000_revs_x000_added_x_copies 9f17a6fc04f9 2d37b966abed : 0.733043 s, 0.004868 s, - 0.728175 s, × 0.006641
mozilla-try x000_revs_x000_added_x000_copies 1346fd0130e4 4c65cbdabc1f : 1.163367 s, 0.222450 s, - 0.940917 s, × 0.191212
mozilla-try x0000_revs_x_added_0_copies 63519bfd42ee a36a2a865d92 : 0.085456 s, 0.370675 s, + 0.285219 s, × 4.337612
mozilla-try x0000_revs_x_added_x_copies 9fe69ff0762d bcabf2a78927 : 0.083601 s, 0.358020 s, + 0.274419 s, × 4.282485
mozilla-try x0000_revs_xx000_added_x_copies 156f6e2674f2 4d0f2c178e66 : 7.366614 s, 0.145235 s, - 7.221379 s, × 0.019715
mozilla-try x0000_revs_xx000_added_0_copies 9eec5917337d 67118cc6dcad : 6.664464 s, 0.037606 s, - 6.626858 s, × 0.005643
mozilla-try x0000_revs_xx000_added_x000_copies 89294cd501d9 7ccb2fc7ccb5 : 7.467836 s, 7.382439 s, - 0.085397 s, × 0.988565
mozilla-try x0000_revs_x0000_added_x0000_copies e928c65095ed e951f4ad123a : 9.801294 s, 7.273506 s, - 2.527788 s, × 0.742097
mozilla-try x00000_revs_x_added_0_copies 6a320851d377 1ebb79acd503 : 0.091886 s, killed
mozilla-try x00000_revs_x00000_added_0_copies dc8a3ca7010e d16fde900c9c : 26.491140 s, 1.074593 s, -25.416547 s, × 0.040564
mozilla-try x00000_revs_x_added_x_copies 5173c4b6f97c 95d83ee7242d : 0.092863 s, killed
mozilla-try x00000_revs_x000_added_x_copies 9126823d0e9c ca82787bb23c : 0.226823 s, killed
mozilla-try x00000_revs_x0000_added_x0000_copies 8d3fafa80d4b eb884023b810 : 18.914630 s, 27.746195 s, + 8.831565 s, × 1.466917
mozilla-try x00000_revs_x00000_added_x0000_copies 1b661134e2ca 1ae03d022d6d : 21.198903 s, killed
mozilla-try x00000_revs_x00000_added_x000_copies 9b2a99adc05e 8e29777b48e6 : 24.952268 s, killed
Differential Revision: https://phab.mercurial-scm.org/D9296
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
---|---|
date | Mon, 02 Nov 2020 11:03:56 +0100 |
parents | ff7e0ca666e8 |
children | 89a2afe31e82 |
rev | line source |
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6274
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Matt Mackall <mpm@selenic.com>
parents:
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1 # copies.py - copy detection for Mercurial |
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2 # |
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3 # Copyright 2008 Matt Mackall <mpm@selenic.com> |
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4 # |
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Martin Geisler <mg@lazybytes.net>
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5 # This software may be used and distributed according to the terms of the |
10263 | 6 # GNU General Public License version 2 or any later version. |
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7 |
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Gregory Szorc <gregory.szorc@gmail.com>
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8 from __future__ import absolute_import |
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9 |
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10 import collections |
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11 import os |
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12 |
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13 from .i18n import _ |
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14 |
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15 |
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16 from . import ( |
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Yuya Nishihara <yuya@tcha.org>
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17 match as matchmod, |
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18 node, |
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19 pathutil, |
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20 pycompat, |
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21 util, |
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22 ) |
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23 |
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24 |
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25 from .utils import stringutil |
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26 |
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27 from .revlogutils import flagutil |
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28 |
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29 |
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30 def _filter(src, dst, t): |
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31 """filters out invalid copies after chaining""" |
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32 |
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33 # When _chain()'ing copies in 'a' (from 'src' via some other commit 'mid') |
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34 # with copies in 'b' (from 'mid' to 'dst'), we can get the different cases |
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35 # in the following table (not including trivial cases). For example, case 2 |
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36 # is where a file existed in 'src' and remained under that name in 'mid' and |
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37 # then was renamed between 'mid' and 'dst'. |
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38 # |
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39 # case src mid dst result |
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40 # 1 x y - - |
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41 # 2 x y y x->y |
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42 # 3 x y x - |
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43 # 4 x y z x->z |
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44 # 5 - x y - |
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45 # 6 x x y x->y |
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46 # |
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47 # _chain() takes care of chaining the copies in 'a' and 'b', but it |
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48 # cannot tell the difference between cases 1 and 2, between 3 and 4, or |
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49 # between 5 and 6, so it includes all cases in its result. |
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50 # Cases 1, 3, and 5 are then removed by _filter(). |
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51 |
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52 for k, v in list(t.items()): |
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53 # remove copies from files that didn't exist |
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54 if v not in src: |
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55 del t[k] |
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56 # remove criss-crossed copies |
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57 elif k in src and v in dst: |
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58 del t[k] |
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59 # remove copies to files that were then removed |
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60 elif k not in dst: |
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61 del t[k] |
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62 |
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63 |
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64 def _chain(prefix, suffix): |
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65 """chain two sets of copies 'prefix' and 'suffix'""" |
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66 result = prefix.copy() |
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67 for key, value in pycompat.iteritems(suffix): |
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68 result[key] = prefix.get(value, value) |
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69 return result |
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70 |
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71 |
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72 def _tracefile(fctx, am, basemf): |
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73 """return file context that is the ancestor of fctx present in ancestor |
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74 manifest am |
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75 |
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76 Note: we used to try and stop after a given limit, however checking if that |
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77 limit is reached turned out to be very expensive. we are better off |
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78 disabling that feature.""" |
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79 |
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80 for f in fctx.ancestors(): |
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81 path = f.path() |
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82 if am.get(path, None) == f.filenode(): |
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83 return path |
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84 if basemf and basemf.get(path, None) == f.filenode(): |
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85 return path |
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86 |
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87 |
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88 def _dirstatecopies(repo, match=None): |
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89 ds = repo.dirstate |
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90 c = ds.copies().copy() |
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91 for k in list(c): |
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92 if ds[k] not in b'anm' or (match and not match(k)): |
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93 del c[k] |
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94 return c |
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95 |
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96 |
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97 def _computeforwardmissing(a, b, match=None): |
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98 """Computes which files are in b but not a. |
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99 This is its own function so extensions can easily wrap this call to see what |
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100 files _forwardcopies is about to process. |
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101 """ |
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102 ma = a.manifest() |
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103 mb = b.manifest() |
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104 return mb.filesnotin(ma, match=match) |
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105 |
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106 |
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107 def usechangesetcentricalgo(repo): |
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108 """Checks if we should use changeset-centric copy algorithms""" |
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109 if repo.filecopiesmode == b'changeset-sidedata': |
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110 return True |
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111 readfrom = repo.ui.config(b'experimental', b'copies.read-from') |
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112 changesetsource = (b'changeset-only', b'compatibility') |
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113 return readfrom in changesetsource |
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114 |
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115 |
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116 def _committedforwardcopies(a, b, base, match): |
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117 """Like _forwardcopies(), but b.rev() cannot be None (working copy)""" |
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118 # files might have to be traced back to the fctx parent of the last |
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119 # one-side-only changeset, but not further back than that |
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120 repo = a._repo |
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121 |
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122 if usechangesetcentricalgo(repo): |
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123 return _changesetforwardcopies(a, b, match) |
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124 |
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125 debug = repo.ui.debugflag and repo.ui.configbool(b'devel', b'debug.copies') |
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126 dbg = repo.ui.debug |
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127 if debug: |
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128 dbg(b'debug.copies: looking into rename from %s to %s\n' % (a, b)) |
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129 am = a.manifest() |
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130 basemf = None if base is None else base.manifest() |
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131 |
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132 # find where new files came from |
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133 # we currently don't try to find where old files went, too expensive |
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134 # this means we can miss a case like 'hg rm b; hg cp a b' |
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135 cm = {} |
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136 |
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137 # Computing the forward missing is quite expensive on large manifests, since |
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138 # it compares the entire manifests. We can optimize it in the common use |
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139 # case of computing what copies are in a commit versus its parent (like |
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140 # during a rebase or histedit). Note, we exclude merge commits from this |
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141 # optimization, since the ctx.files() for a merge commit is not correct for |
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142 # this comparison. |
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143 forwardmissingmatch = match |
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144 if b.p1() == a and b.p2().node() == node.nullid: |
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145 filesmatcher = matchmod.exact(b.files()) |
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146 forwardmissingmatch = matchmod.intersectmatchers(match, filesmatcher) |
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147 missing = _computeforwardmissing(a, b, match=forwardmissingmatch) |
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148 |
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149 ancestrycontext = a._repo.changelog.ancestors([b.rev()], inclusive=True) |
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150 |
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151 if debug: |
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152 dbg(b'debug.copies: missing files to search: %d\n' % len(missing)) |
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153 |
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154 for f in sorted(missing): |
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155 if debug: |
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156 dbg(b'debug.copies: tracing file: %s\n' % f) |
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157 fctx = b[f] |
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158 fctx._ancestrycontext = ancestrycontext |
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159 |
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160 if debug: |
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161 start = util.timer() |
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162 opath = _tracefile(fctx, am, basemf) |
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163 if opath: |
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164 if debug: |
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165 dbg(b'debug.copies: rename of: %s\n' % opath) |
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166 cm[f] = opath |
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167 if debug: |
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168 dbg( |
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169 b'debug.copies: time: %f seconds\n' |
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170 % (util.timer() - start) |
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171 ) |
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172 return cm |
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173 |
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174 |
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175 def _revinfo_getter(repo): |
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176 """returns a function that returns the following data given a <rev>" |
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177 |
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178 * p1: revision number of first parent |
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179 * p2: revision number of first parent |
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180 * changes: a ChangingFiles object |
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181 """ |
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182 cl = repo.changelog |
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183 parents = cl.parentrevs |
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184 flags = cl.flags |
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185 |
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186 HASCOPIESINFO = flagutil.REVIDX_HASCOPIESINFO |
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187 |
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188 changelogrevision = cl.changelogrevision |
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189 |
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190 # A small cache to avoid doing the work twice for merges |
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191 # |
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192 # In the vast majority of cases, if we ask information for a revision |
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193 # about 1 parent, we'll later ask it for the other. So it make sense to |
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194 # keep the information around when reaching the first parent of a merge |
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195 # and dropping it after it was provided for the second parents. |
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196 # |
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197 # It exists cases were only one parent of the merge will be walked. It |
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198 # happens when the "destination" the copy tracing is descendant from a |
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199 # new root, not common with the "source". In that case, we will only walk |
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200 # through merge parents that are descendant of changesets common |
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201 # between "source" and "destination". |
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202 # |
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203 # With the current case implementation if such changesets have a copy |
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204 # information, we'll keep them in memory until the end of |
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205 # _changesetforwardcopies. We don't expect the case to be frequent |
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206 # enough to matters. |
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207 # |
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208 # In addition, it would be possible to reach pathological case, were |
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209 # many first parent are met before any second parent is reached. In |
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210 # that case the cache could grow. If this even become an issue one can |
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211 # safely introduce a maximum cache size. This would trade extra CPU/IO |
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212 # time to save memory. |
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213 merge_caches = {} |
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214 |
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215 def revinfo(rev): |
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216 p1, p2 = parents(rev) |
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217 value = None |
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218 e = merge_caches.pop(rev, None) |
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219 if e is not None: |
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220 return e |
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221 changes = None |
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222 if flags(rev) & HASCOPIESINFO: |
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223 changes = changelogrevision(rev).changes |
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224 value = (p1, p2, changes) |
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225 if p1 != node.nullrev and p2 != node.nullrev: |
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226 # XXX some case we over cache, IGNORE |
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227 merge_caches[rev] = value |
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228 return value |
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229 |
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230 return revinfo |
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231 |
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232 |
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233 def cached_is_ancestor(is_ancestor): |
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234 """return a cached version of is_ancestor""" |
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235 cache = {} |
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236 |
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237 def _is_ancestor(anc, desc): |
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238 if anc > desc: |
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239 return False |
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240 elif anc == desc: |
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241 return True |
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242 key = (anc, desc) |
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243 ret = cache.get(key) |
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244 if ret is None: |
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245 ret = cache[key] = is_ancestor(anc, desc) |
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246 return ret |
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247 |
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248 return _is_ancestor |
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249 |
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250 |
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251 def _changesetforwardcopies(a, b, match): |
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252 if a.rev() in (node.nullrev, b.rev()): |
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253 return {} |
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254 |
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255 repo = a.repo().unfiltered() |
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256 children = {} |
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257 |
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258 cl = repo.changelog |
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259 isancestor = cached_is_ancestor(cl.isancestorrev) |
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260 missingrevs = cl.findmissingrevs(common=[a.rev()], heads=[b.rev()]) |
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261 mrset = set(missingrevs) |
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262 roots = set() |
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263 for r in missingrevs: |
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264 for p in cl.parentrevs(r): |
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265 if p == node.nullrev: |
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266 continue |
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267 if p not in children: |
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268 children[p] = [r] |
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269 else: |
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270 children[p].append(r) |
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271 if p not in mrset: |
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272 roots.add(p) |
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273 if not roots: |
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274 # no common revision to track copies from |
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275 return {} |
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276 min_root = min(roots) |
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277 |
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278 from_head = set( |
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279 cl.reachableroots(min_root, [b.rev()], list(roots), includepath=True) |
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280 ) |
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281 |
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282 iterrevs = set(from_head) |
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283 iterrevs &= mrset |
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284 iterrevs.update(roots) |
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285 iterrevs.remove(b.rev()) |
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286 revs = sorted(iterrevs) |
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287 |
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288 if repo.filecopiesmode == b'changeset-sidedata': |
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289 revinfo = _revinfo_getter(repo) |
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290 return _combine_changeset_copies( |
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291 revs, children, b.rev(), revinfo, match, isancestor |
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292 ) |
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293 else: |
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294 revinfo = _revinfo_getter_extra(repo) |
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295 return _combine_changeset_copies_extra( |
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296 revs, children, b.rev(), revinfo, match, isancestor |
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297 ) |
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298 |
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299 |
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300 def _combine_changeset_copies( |
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301 revs, children, targetrev, revinfo, match, isancestor |
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302 ): |
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303 """combine the copies information for each item of iterrevs |
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304 |
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305 revs: sorted iterable of revision to visit |
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306 children: a {parent: [children]} mapping. |
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307 targetrev: the final copies destination revision (not in iterrevs) |
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308 revinfo(rev): a function that return (p1, p2, p1copies, p2copies, removed) |
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309 match: a matcher |
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310 |
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311 It returns the aggregated copies information for `targetrev`. |
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312 """ |
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313 all_copies = {} |
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314 alwaysmatch = match.always() |
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315 for r in revs: |
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316 copies = all_copies.pop(r, None) |
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317 if copies is None: |
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318 # this is a root |
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319 copies = {} |
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320 for i, c in enumerate(children[r]): |
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321 p1, p2, changes = revinfo(c) |
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322 childcopies = {} |
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323 if r == p1: |
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324 parent = 1 |
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325 if changes is not None: |
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326 childcopies = changes.copied_from_p1 |
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327 else: |
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328 assert r == p2 |
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329 parent = 2 |
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330 if changes is not None: |
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331 childcopies = changes.copied_from_p2 |
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332 if not alwaysmatch: |
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333 childcopies = { |
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334 dst: src for dst, src in childcopies.items() if match(dst) |
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335 } |
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336 newcopies = copies |
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337 if childcopies: |
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338 newcopies = copies.copy() |
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339 for dest, source in pycompat.iteritems(childcopies): |
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340 prev = copies.get(source) |
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341 if prev is not None and prev[1] is not None: |
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342 source = prev[1] |
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343 newcopies[dest] = (c, source) |
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344 assert newcopies is not copies |
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345 if changes is not None: |
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346 for f in changes.removed: |
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347 if f in newcopies: |
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348 if newcopies is copies: |
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349 # copy on write to avoid affecting potential other |
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350 # branches. when there are no other branches, this |
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351 # could be avoided. |
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352 newcopies = copies.copy() |
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353 newcopies[f] = (c, None) |
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354 othercopies = all_copies.get(c) |
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355 if othercopies is None: |
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356 all_copies[c] = newcopies |
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357 else: |
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358 # we are the second parent to work on c, we need to merge our |
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359 # work with the other. |
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360 # |
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361 # In case of conflict, parent 1 take precedence over parent 2. |
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362 # This is an arbitrary choice made anew when implementing |
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363 # changeset based copies. It was made without regards with |
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364 # potential filelog related behavior. |
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365 if parent == 1: |
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366 _merge_copies_dict( |
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367 othercopies, newcopies, isancestor, changes |
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368 ) |
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369 else: |
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370 _merge_copies_dict( |
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371 newcopies, othercopies, isancestor, changes |
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372 ) |
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373 all_copies[c] = newcopies |
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374 |
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375 final_copies = {} |
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376 for dest, (tt, source) in all_copies[targetrev].items(): |
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377 if source is not None: |
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378 final_copies[dest] = source |
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379 return final_copies |
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380 |
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381 |
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382 def _merge_copies_dict(minor, major, isancestor, changes): |
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383 """merge two copies-mapping together, minor and major |
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384 |
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385 In case of conflict, value from "major" will be picked. |
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386 |
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387 - `isancestors(low_rev, high_rev)`: callable return True if `low_rev` is an |
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388 ancestors of `high_rev`, |
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389 |
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390 - `ismerged(path)`: callable return True if `path` have been merged in the |
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391 current revision, |
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392 """ |
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393 for dest, value in major.items(): |
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394 other = minor.get(dest) |
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395 if other is None: |
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396 minor[dest] = value |
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397 else: |
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398 new_tt = value[0] |
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399 other_tt = other[0] |
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400 if value[1] == other[1]: |
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401 continue |
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402 # content from "major" wins, unless it is older |
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403 # than the branch point or there is a merge |
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404 if new_tt == other_tt: |
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405 minor[dest] = value |
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406 elif ( |
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407 changes is not None |
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408 and value[1] is None |
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409 and dest in changes.salvaged |
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410 ): |
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411 pass |
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412 elif ( |
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413 changes is not None |
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414 and other[1] is None |
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415 and dest in changes.salvaged |
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416 ): |
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417 minor[dest] = value |
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418 elif changes is not None and dest in changes.merged: |
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419 minor[dest] = value |
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420 elif not isancestor(new_tt, other_tt): |
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421 if value[1] is not None: |
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422 minor[dest] = value |
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423 elif isancestor(other_tt, new_tt): |
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424 minor[dest] = value |
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425 |
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426 |
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427 def _revinfo_getter_extra(repo): |
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428 """return a function that return multiple data given a <rev>"i |
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429 |
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430 * p1: revision number of first parent |
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431 * p2: revision number of first parent |
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432 * p1copies: mapping of copies from p1 |
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433 * p2copies: mapping of copies from p2 |
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434 * removed: a list of removed files |
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435 * ismerged: a callback to know if file was merged in that revision |
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436 """ |
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437 cl = repo.changelog |
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438 parents = cl.parentrevs |
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439 |
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440 def get_ismerged(rev): |
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441 ctx = repo[rev] |
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442 |
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443 def ismerged(path): |
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444 if path not in ctx.files(): |
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445 return False |
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446 fctx = ctx[path] |
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447 parents = fctx._filelog.parents(fctx._filenode) |
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448 nb_parents = 0 |
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449 for n in parents: |
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450 if n != node.nullid: |
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451 nb_parents += 1 |
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452 return nb_parents >= 2 |
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453 |
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454 return ismerged |
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455 |
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456 def revinfo(rev): |
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457 p1, p2 = parents(rev) |
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458 ctx = repo[rev] |
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459 p1copies, p2copies = ctx._copies |
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460 removed = ctx.filesremoved() |
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461 return p1, p2, p1copies, p2copies, removed, get_ismerged(rev) |
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462 |
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463 return revinfo |
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464 |
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465 |
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466 def _combine_changeset_copies_extra( |
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467 revs, children, targetrev, revinfo, match, isancestor |
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468 ): |
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469 """version of `_combine_changeset_copies` that works with the Google |
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470 specific "extra" based storage for copy information""" |
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471 all_copies = {} |
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472 alwaysmatch = match.always() |
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473 for r in revs: |
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474 copies = all_copies.pop(r, None) |
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475 if copies is None: |
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476 # this is a root |
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477 copies = {} |
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478 for i, c in enumerate(children[r]): |
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479 p1, p2, p1copies, p2copies, removed, ismerged = revinfo(c) |
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480 if r == p1: |
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481 parent = 1 |
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482 childcopies = p1copies |
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483 else: |
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484 assert r == p2 |
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485 parent = 2 |
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486 childcopies = p2copies |
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487 if not alwaysmatch: |
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488 childcopies = { |
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489 dst: src for dst, src in childcopies.items() if match(dst) |
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490 } |
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491 newcopies = copies |
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492 if childcopies: |
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493 newcopies = copies.copy() |
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494 for dest, source in pycompat.iteritems(childcopies): |
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495 prev = copies.get(source) |
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496 if prev is not None and prev[1] is not None: |
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497 source = prev[1] |
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498 newcopies[dest] = (c, source) |
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499 assert newcopies is not copies |
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500 for f in removed: |
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501 if f in newcopies: |
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502 if newcopies is copies: |
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503 # copy on write to avoid affecting potential other |
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504 # branches. when there are no other branches, this |
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505 # could be avoided. |
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|
506 newcopies = copies.copy() |
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507 newcopies[f] = (c, None) |
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|
508 othercopies = all_copies.get(c) |
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|
509 if othercopies is None: |
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510 all_copies[c] = newcopies |
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|
511 else: |
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|
512 # we are the second parent to work on c, we need to merge our |
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|
513 # work with the other. |
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|
514 # |
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515 # In case of conflict, parent 1 take precedence over parent 2. |
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516 # This is an arbitrary choice made anew when implementing |
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517 # changeset based copies. It was made without regards with |
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518 # potential filelog related behavior. |
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|
519 if parent == 1: |
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|
520 _merge_copies_dict_extra( |
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521 othercopies, newcopies, isancestor, ismerged |
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|
522 ) |
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523 else: |
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|
524 _merge_copies_dict_extra( |
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|
525 newcopies, othercopies, isancestor, ismerged |
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|
526 ) |
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|
527 all_copies[c] = newcopies |
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|
528 |
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|
529 final_copies = {} |
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|
530 for dest, (tt, source) in all_copies[targetrev].items(): |
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|
531 if source is not None: |
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|
532 final_copies[dest] = source |
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|
533 return final_copies |
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|
534 |
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|
535 |
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|
536 def _merge_copies_dict_extra(minor, major, isancestor, ismerged): |
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|
537 """version of `_merge_copies_dict` that works with the Google |
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|
538 specific "extra" based storage for copy information""" |
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changeset
|
539 for dest, value in major.items(): |
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|
540 other = minor.get(dest) |
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|
541 if other is None: |
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changeset
|
542 minor[dest] = value |
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changeset
|
543 else: |
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|
544 new_tt = value[0] |
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545 other_tt = other[0] |
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546 if value[1] == other[1]: |
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547 continue |
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548 # content from "major" wins, unless it is older |
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549 # than the branch point or there is a merge |
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550 if ( |
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551 new_tt == other_tt |
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552 or not isancestor(new_tt, other_tt) |
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553 or ismerged(dest) |
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554 ): |
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555 minor[dest] = value |
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556 |
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557 |
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558 def _forwardcopies(a, b, base=None, match=None): |
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559 """find {dst@b: src@a} copy mapping where a is an ancestor of b""" |
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560 |
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561 if base is None: |
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562 base = a |
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563 match = a.repo().narrowmatch(match) |
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564 # check for working copy |
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565 if b.rev() is None: |
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566 cm = _committedforwardcopies(a, b.p1(), base, match) |
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567 # combine copies from dirstate if necessary |
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568 copies = _chain(cm, _dirstatecopies(b._repo, match)) |
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569 else: |
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570 copies = _committedforwardcopies(a, b, base, match) |
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571 return copies |
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572 |
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573 |
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574 def _backwardrenames(a, b, match): |
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575 if a._repo.ui.config(b'experimental', b'copytrace') == b'off': |
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576 return {} |
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577 |
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578 # Even though we're not taking copies into account, 1:n rename situations |
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579 # can still exist (e.g. hg cp a b; hg mv a c). In those cases we |
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580 # arbitrarily pick one of the renames. |
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581 # We don't want to pass in "match" here, since that would filter |
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582 # the destination by it. Since we're reversing the copies, we want |
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583 # to filter the source instead. |
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584 f = _forwardcopies(b, a) |
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585 r = {} |
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586 for k, v in sorted(pycompat.iteritems(f)): |
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587 if match and not match(v): |
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588 continue |
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589 # remove copies |
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590 if v in a: |
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591 continue |
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592 r[v] = k |
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593 return r |
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594 |
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595 |
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596 def pathcopies(x, y, match=None): |
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597 """find {dst@y: src@x} copy mapping for directed compare""" |
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598 repo = x._repo |
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599 debug = repo.ui.debugflag and repo.ui.configbool(b'devel', b'debug.copies') |
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600 if debug: |
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601 repo.ui.debug( |
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602 b'debug.copies: searching copies from %s to %s\n' % (x, y) |
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603 ) |
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604 if x == y or not x or not y: |
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605 return {} |
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606 if y.rev() is None and x == y.p1(): |
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607 if debug: |
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608 repo.ui.debug(b'debug.copies: search mode: dirstate\n') |
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609 # short-circuit to avoid issues with merge states |
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610 return _dirstatecopies(repo, match) |
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611 a = y.ancestor(x) |
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612 if a == x: |
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613 if debug: |
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614 repo.ui.debug(b'debug.copies: search mode: forward\n') |
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615 copies = _forwardcopies(x, y, match=match) |
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616 elif a == y: |
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617 if debug: |
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618 repo.ui.debug(b'debug.copies: search mode: backward\n') |
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619 copies = _backwardrenames(x, y, match=match) |
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620 else: |
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621 if debug: |
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622 repo.ui.debug(b'debug.copies: search mode: combined\n') |
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623 base = None |
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624 if a.rev() != node.nullrev: |
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625 base = x |
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626 copies = _chain( |
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627 _backwardrenames(x, a, match=match), |
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628 _forwardcopies(a, y, base, match=match), |
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629 ) |
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630 _filter(x, y, copies) |
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631 return copies |
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632 |
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633 |
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634 def mergecopies(repo, c1, c2, base): |
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635 """ |
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636 Finds moves and copies between context c1 and c2 that are relevant for |
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637 merging. 'base' will be used as the merge base. |
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638 |
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639 Copytracing is used in commands like rebase, merge, unshelve, etc to merge |
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640 files that were moved/ copied in one merge parent and modified in another. |
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641 For example: |
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642 |
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643 o ---> 4 another commit |
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644 | |
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645 | o ---> 3 commit that modifies a.txt |
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646 | / |
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647 o / ---> 2 commit that moves a.txt to b.txt |
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648 |/ |
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649 o ---> 1 merge base |
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650 |
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651 If we try to rebase revision 3 on revision 4, since there is no a.txt in |
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652 revision 4, and if user have copytrace disabled, we prints the following |
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653 message: |
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654 |
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655 ```other changed <file> which local deleted``` |
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656 |
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657 Returns a tuple where: |
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658 |
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659 "branch_copies" an instance of branch_copies. |
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660 |
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661 "diverge" is a mapping of source name -> list of destination names |
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662 for divergent renames. |
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663 |
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664 This function calls different copytracing algorithms based on config. |
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665 """ |
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666 # avoid silly behavior for update from empty dir |
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667 if not c1 or not c2 or c1 == c2: |
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668 return branch_copies(), branch_copies(), {} |
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669 |
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670 narrowmatch = c1.repo().narrowmatch() |
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671 |
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672 # avoid silly behavior for parent -> working dir |
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673 if c2.node() is None and c1.node() == repo.dirstate.p1(): |
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674 return ( |
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675 branch_copies(_dirstatecopies(repo, narrowmatch)), |
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676 branch_copies(), |
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677 {}, |
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678 ) |
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679 |
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680 copytracing = repo.ui.config(b'experimental', b'copytrace') |
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681 if stringutil.parsebool(copytracing) is False: |
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682 # stringutil.parsebool() returns None when it is unable to parse the |
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683 # value, so we should rely on making sure copytracing is on such cases |
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684 return branch_copies(), branch_copies(), {} |
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685 |
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686 if usechangesetcentricalgo(repo): |
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687 # The heuristics don't make sense when we need changeset-centric algos |
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688 return _fullcopytracing(repo, c1, c2, base) |
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689 |
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690 # Copy trace disabling is explicitly below the node == p1 logic above |
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691 # because the logic above is required for a simple copy to be kept across a |
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692 # rebase. |
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693 if copytracing == b'heuristics': |
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694 # Do full copytracing if only non-public revisions are involved as |
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695 # that will be fast enough and will also cover the copies which could |
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696 # be missed by heuristics |
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697 if _isfullcopytraceable(repo, c1, base): |
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698 return _fullcopytracing(repo, c1, c2, base) |
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699 return _heuristicscopytracing(repo, c1, c2, base) |
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700 else: |
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701 return _fullcopytracing(repo, c1, c2, base) |
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702 |
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703 |
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704 def _isfullcopytraceable(repo, c1, base): |
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705 """ Checks that if base, source and destination are all no-public branches, |
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706 if yes let's use the full copytrace algorithm for increased capabilities |
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707 since it will be fast enough. |
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708 |
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709 `experimental.copytrace.sourcecommitlimit` can be used to set a limit for |
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710 number of changesets from c1 to base such that if number of changesets are |
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711 more than the limit, full copytracing algorithm won't be used. |
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712 """ |
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713 if c1.rev() is None: |
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714 c1 = c1.p1() |
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715 if c1.mutable() and base.mutable(): |
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716 sourcecommitlimit = repo.ui.configint( |
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717 b'experimental', b'copytrace.sourcecommitlimit' |
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718 ) |
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719 commits = len(repo.revs(b'%d::%d', base.rev(), c1.rev())) |
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720 return commits < sourcecommitlimit |
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721 return False |
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722 |
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723 |
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724 def _checksinglesidecopies( |
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725 src, dsts1, m1, m2, mb, c2, base, copy, renamedelete |
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726 ): |
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|
727 if src not in m2: |
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728 # deleted on side 2 |
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729 if src not in m1: |
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730 # renamed on side 1, deleted on side 2 |
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731 renamedelete[src] = dsts1 |
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732 elif src not in mb: |
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733 # Work around the "short-circuit to avoid issues with merge states" |
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734 # thing in pathcopies(): pathcopies(x, y) can return a copy where the |
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735 # destination doesn't exist in y. |
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|
736 pass |
44909
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737 elif mb[src] != m2[src] and not _related(c2[src], base[src]): |
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738 return |
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739 elif mb[src] != m2[src] or mb.flags(src) != m2.flags(src): |
42222
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740 # modified on side 2 |
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|
741 for dst in dsts1: |
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742 copy[dst] = src |
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743 |
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744 |
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745 class branch_copies(object): |
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746 """Information about copies made on one side of a merge/graft. |
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747 |
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748 "copy" is a mapping from destination name -> source name, |
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749 where source is in c1 and destination is in c2 or vice-versa. |
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750 |
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|
751 "movewithdir" is a mapping from source name -> destination name, |
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752 where the file at source present in one context but not the other |
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|
753 needs to be moved to destination by the merge process, because the |
7f8bdee0034e
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|
754 other context moved the directory it is in. |
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755 |
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756 "renamedelete" is a mapping of source name -> list of destination |
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757 names for files deleted in c1 that were renamed in c2 or vice-versa. |
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758 |
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|
759 "dirmove" is a mapping of detected source dir -> destination dir renames. |
7f8bdee0034e
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|
760 This is needed for handling changes to new files previously grafted into |
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761 renamed directories. |
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762 """ |
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763 |
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764 def __init__( |
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765 self, copy=None, renamedelete=None, dirmove=None, movewithdir=None |
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766 ): |
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767 self.copy = {} if copy is None else copy |
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768 self.renamedelete = {} if renamedelete is None else renamedelete |
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769 self.dirmove = {} if dirmove is None else dirmove |
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770 self.movewithdir = {} if movewithdir is None else movewithdir |
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771 |
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772 def __repr__(self): |
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773 return ( |
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774 '<branch_copies\n copy=%r\n renamedelete=%r\n dirmove=%r\n movewithdir=%r\n>' |
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775 % (self.copy, self.renamedelete, self.dirmove, self.movewithdir,) |
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776 ) |
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777 |
44199
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778 |
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779 def _fullcopytracing(repo, c1, c2, base): |
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780 """ The full copytracing algorithm which finds all the new files that were |
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781 added from merge base up to the top commit and for each file it checks if |
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782 this file was copied from another file. |
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783 |
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784 This is pretty slow when a lot of changesets are involved but will track all |
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785 the copies. |
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786 """ |
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787 m1 = c1.manifest() |
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788 m2 = c2.manifest() |
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789 mb = base.manifest() |
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790 |
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791 copies1 = pathcopies(base, c1) |
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792 copies2 = pathcopies(base, c2) |
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793 |
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794 if not (copies1 or copies2): |
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795 return branch_copies(), branch_copies(), {} |
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796 |
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797 inversecopies1 = {} |
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798 inversecopies2 = {} |
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799 for dst, src in copies1.items(): |
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800 inversecopies1.setdefault(src, []).append(dst) |
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801 for dst, src in copies2.items(): |
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802 inversecopies2.setdefault(src, []).append(dst) |
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803 |
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804 copy1 = {} |
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805 copy2 = {} |
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806 diverge = {} |
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807 renamedelete1 = {} |
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808 renamedelete2 = {} |
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809 allsources = set(inversecopies1) | set(inversecopies2) |
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810 for src in allsources: |
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811 dsts1 = inversecopies1.get(src) |
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812 dsts2 = inversecopies2.get(src) |
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813 if dsts1 and dsts2: |
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814 # copied/renamed on both sides |
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815 if src not in m1 and src not in m2: |
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816 # renamed on both sides |
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817 dsts1 = set(dsts1) |
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818 dsts2 = set(dsts2) |
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819 # If there's some overlap in the rename destinations, we |
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820 # consider it not divergent. For example, if side 1 copies 'a' |
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821 # to 'b' and 'c' and deletes 'a', and side 2 copies 'a' to 'c' |
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822 # and 'd' and deletes 'a'. |
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823 if dsts1 & dsts2: |
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824 for dst in dsts1 & dsts2: |
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825 copy1[dst] = src |
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826 copy2[dst] = src |
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827 else: |
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828 diverge[src] = sorted(dsts1 | dsts2) |
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829 elif src in m1 and src in m2: |
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830 # copied on both sides |
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831 dsts1 = set(dsts1) |
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832 dsts2 = set(dsts2) |
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833 for dst in dsts1 & dsts2: |
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834 copy1[dst] = src |
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|
835 copy2[dst] = src |
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836 # TODO: Handle cases where it was renamed on one side and copied |
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837 # on the other side |
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838 elif dsts1: |
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839 # copied/renamed only on side 1 |
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|
840 _checksinglesidecopies( |
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841 src, dsts1, m1, m2, mb, c2, base, copy1, renamedelete1 |
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842 ) |
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843 elif dsts2: |
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844 # copied/renamed only on side 2 |
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|
845 _checksinglesidecopies( |
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846 src, dsts2, m2, m1, mb, c1, base, copy2, renamedelete2 |
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847 ) |
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|
848 |
26659
df66736a128e
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|
849 # find interesting file sets from manifests |
39966
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|
850 addedinm1 = m1.filesnotin(mb, repo.narrowmatch()) |
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851 addedinm2 = m2.filesnotin(mb, repo.narrowmatch()) |
42223
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|
852 u1 = sorted(addedinm1 - addedinm2) |
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853 u2 = sorted(addedinm2 - addedinm1) |
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854 |
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|
855 header = b" unmatched files in %s" |
42223
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856 if u1: |
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857 repo.ui.debug(b"%s:\n %s\n" % (header % b'local', b"\n ".join(u1))) |
42223
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858 if u2: |
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859 repo.ui.debug(b"%s:\n %s\n" % (header % b'other', b"\n ".join(u2))) |
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860 |
42166
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861 if repo.ui.debugflag: |
44163
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862 renamedeleteset = set() |
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|
863 divergeset = set() |
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864 for dsts in diverge.values(): |
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|
865 divergeset.update(dsts) |
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866 for dsts in renamedelete1.values(): |
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867 renamedeleteset.update(dsts) |
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868 for dsts in renamedelete2.values(): |
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869 renamedeleteset.update(dsts) |
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|
870 |
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871 repo.ui.debug( |
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872 b" all copies found (* = to merge, ! = divergent, " |
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|
873 b"% = renamed and deleted):\n" |
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874 ) |
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|
875 for side, copies in ((b"local", copies1), (b"remote", copies2)): |
17e12938f8e7
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|
876 if not copies: |
17e12938f8e7
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parents:
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diff
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|
877 continue |
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changeset
|
878 repo.ui.debug(b" on %s side:\n" % side) |
17e12938f8e7
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|
879 for f in sorted(copies): |
17e12938f8e7
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|
880 note = b"" |
17e12938f8e7
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|
881 if f in copy1 or f in copy2: |
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882 note += b"*" |
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|
883 if f in divergeset: |
17e12938f8e7
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|
884 note += b"!" |
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|
885 if f in renamedeleteset: |
17e12938f8e7
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|
886 note += b"%" |
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|
887 repo.ui.debug( |
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888 b" src: '%s' -> dst: '%s' %s\n" % (copies[f], f, note) |
17e12938f8e7
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|
889 ) |
44163
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diff
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|
890 del renamedeleteset |
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|
891 del divergeset |
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diff
changeset
|
892 |
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|
893 repo.ui.debug(b" checking for directory renames\n") |
6274
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|
894 |
44196
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copies: make mergecopies() distinguish between copies on each side
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|
895 dirmove1, movewithdir2 = _dir_renames(repo, c1, copy1, copies1, u2) |
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896 dirmove2, movewithdir1 = _dir_renames(repo, c2, copy2, copies2, u1) |
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|
897 |
44200
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merge: start using the per-side copy dicts
Martin von Zweigbergk <martinvonz@google.com>
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diff
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|
898 branch_copies1 = branch_copies(copy1, renamedelete1, dirmove1, movewithdir1) |
fa9ad1da2e77
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|
899 branch_copies2 = branch_copies(copy2, renamedelete2, dirmove2, movewithdir2) |
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|
900 |
44200
fa9ad1da2e77
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|
901 return branch_copies1, branch_copies2, diverge |
44164
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|
902 |
45192589555c
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changeset
|
903 |
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|
904 def _dir_renames(repo, ctx, copy, fullcopy, addedfiles): |
6ca9f45b32b0
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|
905 """Finds moved directories and files that should move with them. |
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|
906 |
6ca9f45b32b0
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|
907 ctx: the context for one of the sides |
6ca9f45b32b0
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|
908 copy: files copied on the same side (as ctx) |
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|
909 fullcopy: files copied on the same side (as ctx), including those that |
6ca9f45b32b0
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|
910 merge.manifestmerge() won't care about |
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|
911 addedfiles: added files on the other side (compared to ctx) |
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|
912 """ |
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|
913 # generate a directory move map |
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|
914 d = ctx.dirs() |
17055
8b7cd9a998f0
copies: re-include root directory in directory rename detection (issue3511)
Matt Mackall <mpm@selenic.com>
parents:
16795
diff
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|
915 invalid = set() |
6274
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diff
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|
916 dirmove = {} |
f3f383efbeae
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|
917 |
f3f383efbeae
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|
918 # examine each file copy for a potential directory move, which is |
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Matt Mackall <mpm@selenic.com>
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diff
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|
919 # when all the files in a directory are moved to a new directory |
43106
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py3: finish porting iteritems() to pycompat and remove source transformer
Gregory Szorc <gregory.szorc@gmail.com>
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43077
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|
920 for dst, src in pycompat.iteritems(fullcopy): |
25282
0f28815ef066
copies: switch to using pathutil.dirname
Durham Goode <durham@fb.com>
parents:
24782
diff
changeset
|
921 dsrc, ddst = pathutil.dirname(src), pathutil.dirname(dst) |
6274
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|
922 if dsrc in invalid: |
f3f383efbeae
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diff
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|
923 # already seen to be uninteresting |
f3f383efbeae
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diff
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|
924 continue |
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|
925 elif dsrc in d and ddst in d: |
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Matt Mackall <mpm@selenic.com>
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diff
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|
926 # directory wasn't entirely moved locally |
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parents:
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diff
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|
927 invalid.add(dsrc) |
eebd591803ab
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Kyle Lippincott <spectral@google.com>
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38670
diff
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|
928 elif dsrc in dirmove and dirmove[dsrc] != ddst: |
6274
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diff
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|
929 # files from the same directory moved to two different places |
39263
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Kyle Lippincott <spectral@google.com>
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|
930 invalid.add(dsrc) |
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|
931 else: |
f3f383efbeae
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diff
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|
932 # looks good so far |
39263
eebd591803ab
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38670
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|
933 dirmove[dsrc] = ddst |
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diff
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|
934 |
f3f383efbeae
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diff
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|
935 for i in invalid: |
f3f383efbeae
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Matt Mackall <mpm@selenic.com>
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diff
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|
936 if i in dirmove: |
f3f383efbeae
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Matt Mackall <mpm@selenic.com>
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diff
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|
937 del dirmove[i] |
44196
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|
938 del d, invalid |
6274
f3f383efbeae
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|
939 |
f3f383efbeae
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diff
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|
940 if not dirmove: |
44164
45192589555c
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diff
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|
941 return {}, {} |
6274
f3f383efbeae
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Matt Mackall <mpm@selenic.com>
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diff
changeset
|
942 |
43106
d783f945a701
py3: finish porting iteritems() to pycompat and remove source transformer
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|
943 dirmove = {k + b"/": v + b"/" for k, v in pycompat.iteritems(dirmove)} |
39263
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Kyle Lippincott <spectral@google.com>
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|
944 |
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f3f383efbeae
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|
945 for d in dirmove: |
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|
946 repo.ui.debug( |
43077
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Augie Fackler <augie@google.com>
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diff
changeset
|
947 b" discovered dir src: '%s' -> dst: '%s'\n" % (d, dirmove[d]) |
43076
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|
948 ) |
6274
f3f383efbeae
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Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
949 |
30183
0106f93ca1d5
checkcopies: move 'movewithdir' initialisation right before its usage
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents:
30138
diff
changeset
|
950 movewithdir = {} |
6274
f3f383efbeae
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Matt Mackall <mpm@selenic.com>
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diff
changeset
|
951 # check unaccounted nonoverlapping files against directory moves |
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|
952 for f in addedfiles: |
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|
953 if f not in fullcopy: |
f3f383efbeae
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diff
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|
954 for d in dirmove: |
f3f383efbeae
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diff
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|
955 if f.startswith(d): |
f3f383efbeae
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diff
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|
956 # new file added in a directory that was moved, move it |
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|
957 df = dirmove[d] + f[len(d) :] |
6426
e2c49ef2dd6e
copies: don't double-detect items in the directory copy check
Matt Mackall <mpm@selenic.com>
parents:
6425
diff
changeset
|
958 if df not in copy: |
18134
6c35b53cd28b
copies: separate moves via directory renames from explicit copies
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parents:
17055
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|
959 movewithdir[f] = df |
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|
960 repo.ui.debug( |
43117
8ff1ecfadcd1
cleanup: join string literals that are already on one line
Martin von Zweigbergk <martinvonz@google.com>
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43106
diff
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|
961 b" pending file src: '%s' -> dst: '%s'\n" |
43076
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|
962 % (f, df) |
2372284d9457
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|
963 ) |
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diff
changeset
|
964 break |
f3f383efbeae
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diff
changeset
|
965 |
44164
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|
966 return dirmove, movewithdir |
19178
4327687ca757
copies: refactor checkcopies() into a top level method
Durham Goode <durham@fb.com>
parents:
18899
diff
changeset
|
967 |
43076
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|
968 |
34179
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diff
changeset
|
969 def _heuristicscopytracing(repo, c1, c2, base): |
036d47d7cf39
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diff
changeset
|
970 """ Fast copytracing using filename heuristics |
036d47d7cf39
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|
971 |
036d47d7cf39
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changeset
|
972 Assumes that moves or renames are of following two types: |
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|
973 |
036d47d7cf39
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changeset
|
974 1) Inside a directory only (same directory name but different filenames) |
036d47d7cf39
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|
975 2) Move from one directory to another |
036d47d7cf39
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|
976 (same filenames but different directory names) |
036d47d7cf39
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|
977 |
036d47d7cf39
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changeset
|
978 Works only when there are no merge commits in the "source branch". |
036d47d7cf39
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changeset
|
979 Source branch is commits from base up to c2 not including base. |
036d47d7cf39
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diff
changeset
|
980 |
036d47d7cf39
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34078
diff
changeset
|
981 If merge is involved it fallbacks to _fullcopytracing(). |
036d47d7cf39
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changeset
|
982 |
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983 Can be used by setting the following config: |
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984 |
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985 [experimental] |
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986 copytrace = heuristics |
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987 |
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988 In some cases the copy/move candidates found by heuristics can be very large |
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989 in number and that will make the algorithm slow. The number of possible |
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990 candidates to check can be limited by using the config |
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991 `experimental.copytrace.movecandidateslimit` which defaults to 100. |
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992 """ |
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993 |
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994 if c1.rev() is None: |
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995 c1 = c1.p1() |
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996 if c2.rev() is None: |
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997 c2 = c2.p1() |
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998 |
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999 changedfiles = set() |
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1000 m1 = c1.manifest() |
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1001 if not repo.revs(b'%d::%d', base.rev(), c2.rev()): |
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1002 # If base is not in c2 branch, we switch to fullcopytracing |
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1003 repo.ui.debug( |
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1004 b"switching to full copytracing as base is not " |
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1005 b"an ancestor of c2\n" |
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1006 ) |
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1007 return _fullcopytracing(repo, c1, c2, base) |
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1008 |
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1009 ctx = c2 |
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1010 while ctx != base: |
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1011 if len(ctx.parents()) == 2: |
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1012 # To keep things simple let's not handle merges |
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1013 repo.ui.debug(b"switching to full copytracing because of merges\n") |
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1014 return _fullcopytracing(repo, c1, c2, base) |
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1015 changedfiles.update(ctx.files()) |
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1016 ctx = ctx.p1() |
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1017 |
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1018 copies2 = {} |
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1019 cp = _forwardcopies(base, c2) |
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1020 for dst, src in pycompat.iteritems(cp): |
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1021 if src in m1: |
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1022 copies2[dst] = src |
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1023 |
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1024 # file is missing if it isn't present in the destination, but is present in |
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1025 # the base and present in the source. |
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1026 # Presence in the base is important to exclude added files, presence in the |
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1027 # source is important to exclude removed files. |
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1028 filt = lambda f: f not in m1 and f in base and f in c2 |
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1029 missingfiles = [f for f in changedfiles if filt(f)] |
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1030 |
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1031 copies1 = {} |
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1032 if missingfiles: |
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1033 basenametofilename = collections.defaultdict(list) |
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1034 dirnametofilename = collections.defaultdict(list) |
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1035 |
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1036 for f in m1.filesnotin(base.manifest()): |
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1037 basename = os.path.basename(f) |
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1038 dirname = os.path.dirname(f) |
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1039 basenametofilename[basename].append(f) |
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1040 dirnametofilename[dirname].append(f) |
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1041 |
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1042 for f in missingfiles: |
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1043 basename = os.path.basename(f) |
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1044 dirname = os.path.dirname(f) |
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1045 samebasename = basenametofilename[basename] |
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1046 samedirname = dirnametofilename[dirname] |
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1047 movecandidates = samebasename + samedirname |
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1048 # f is guaranteed to be present in c2, that's why |
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1049 # c2.filectx(f) won't fail |
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1050 f2 = c2.filectx(f) |
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1051 # we can have a lot of candidates which can slow down the heuristics |
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1052 # config value to limit the number of candidates moves to check |
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1053 maxcandidates = repo.ui.configint( |
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1054 b'experimental', b'copytrace.movecandidateslimit' |
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1055 ) |
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1056 |
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1057 if len(movecandidates) > maxcandidates: |
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1058 repo.ui.status( |
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1059 _( |
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1060 b"skipping copytracing for '%s', more " |
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1061 b"candidates than the limit: %d\n" |
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1062 ) |
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1063 % (f, len(movecandidates)) |
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1064 ) |
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1065 continue |
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1066 |
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1067 for candidate in movecandidates: |
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1068 f1 = c1.filectx(candidate) |
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1069 if _related(f1, f2): |
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1070 # if there are a few related copies then we'll merge |
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1071 # changes into all of them. This matches the behaviour |
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1072 # of upstream copytracing |
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1073 copies1[candidate] = f |
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1074 |
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1075 return branch_copies(copies1), branch_copies(copies2), {} |
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1076 |
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1077 |
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1078 def _related(f1, f2): |
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1079 """return True if f1 and f2 filectx have a common ancestor |
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1080 |
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1081 Walk back to common ancestor to see if the two files originate |
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1082 from the same file. Since workingfilectx's rev() is None it messes |
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1083 up the integer comparison logic, hence the pre-step check for |
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1084 None (f1 and f2 can only be workingfilectx's initially). |
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1085 """ |
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1086 |
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1087 if f1 == f2: |
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1088 return True # a match |
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1089 |
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1090 g1, g2 = f1.ancestors(), f2.ancestors() |
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1091 try: |
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1092 f1r, f2r = f1.linkrev(), f2.linkrev() |
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1093 |
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1094 if f1r is None: |
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1095 f1 = next(g1) |
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1096 if f2r is None: |
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1097 f2 = next(g2) |
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1098 |
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1099 while True: |
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1100 f1r, f2r = f1.linkrev(), f2.linkrev() |
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1101 if f1r > f2r: |
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1102 f1 = next(g1) |
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1103 elif f2r > f1r: |
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1104 f2 = next(g2) |
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1105 else: # f1 and f2 point to files in the same linkrev |
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1106 return f1 == f2 # true if they point to the same file |
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1107 except StopIteration: |
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1108 return False |
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1109 |
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1110 |
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1111 def graftcopies(wctx, ctx, base): |
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1112 """reproduce copies between base and ctx in the wctx |
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1113 |
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1114 Unlike mergecopies(), this function will only consider copies between base |
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1115 and ctx; it will ignore copies between base and wctx. Also unlike |
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1116 mergecopies(), this function will apply copies to the working copy (instead |
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1117 of just returning information about the copies). That makes it cheaper |
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1118 (especially in the common case of base==ctx.p1()) and useful also when |
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1119 experimental.copytrace=off. |
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1120 |
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1121 merge.update() will have already marked most copies, but it will only |
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1122 mark copies if it thinks the source files are related (see |
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1123 merge._related()). It will also not mark copies if the file wasn't modified |
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1124 on the local side. This function adds the copies that were "missed" |
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1125 by merge.update(). |
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1126 """ |
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1127 new_copies = pathcopies(base, ctx) |
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1128 _filter(wctx.p1(), wctx, new_copies) |
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1129 for dst, src in pycompat.iteritems(new_copies): |
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1130 wctx[dst].markcopied(src) |