Mercurial > hg
annotate mercurial/copies.py @ 45962:a66568f20ddc
copies: use the rust code for `combine_changeset_copies`
Changeset centric copy tracing now use the rust code. The rust code focussed on
simplicity and will be optimised later. So the performance is not great yet. Now
that all the pieces are in place we can start working on performance in the
coming changesets.
Below is a table that summarize how slower we got:
Repo Cases Source-Rev Dest-Rev Py-time Rust-time Difference Factor
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mercurial x_revs_x_added_0_copies ad6b123de1c7 39cfcef4f463 : 0.000049 s, 0.000046 s, -0.000003 s, × 0.9388
mercurial x_revs_x_added_x_copies 2b1c78674230 0c1d10351869 : 0.000112 s, 0.000173 s, +0.000061 s, × 1.5446
mercurial x000_revs_x000_added_x_copies 81f8ff2a9bf2 dd3267698d84 : 0.004216 s, 0.006303 s, +0.002087 s, × 1.4950
pypy x_revs_x_added_0_copies aed021ee8ae8 099ed31b181b : 0.000204 s, 0.000229 s, +0.000025 s, × 1.1225
pypy x_revs_x000_added_0_copies 4aa4e1f8e19a 359343b9ac0e : 0.000058 s, 0.000056 s, -0.000002 s, × 0.9655
pypy x_revs_x_added_x_copies ac52eb7bbbb0 72e022663155 : 0.000112 s, 0.000143 s, +0.000031 s, × 1.2768
pypy x_revs_x00_added_x_copies c3b14617fbd7 ace7255d9a26 : 0.000339 s, 0.001166 s, +0.000827 s, × 3.4395
pypy x_revs_x000_added_x000_copies df6f7a526b60 a83dc6a2d56f : 0.010214 s, 0.022931 s, +0.012717 s, × 2.2451
pypy x000_revs_xx00_added_0_copies 89a76aede314 2f22446ff07e : 0.047497 s, 0.852446 s, +0.804949 s, × 17.9474
pypy x000_revs_x000_added_x_copies 8a3b5bfd266e 2c68e87c3efe : 0.075297 s, 2.221824 s, +2.146527 s, × 29.5075
pypy x000_revs_x000_added_x000_copies 89a76aede314 7b3dda341c84 : 0.057322 s, 1.194162 s, +1.136840 s, × 20.8325
pypy x0000_revs_x_added_0_copies d1defd0dc478 c9cb1334cc78 : 0.796264 s, 62.468362 s, +61.672098 s, × 78.4518
pypy x0000_revs_xx000_added_0_copies bf2c629d0071 4ffed77c095c : 0.020491 s, 0.022116 s, +0.001625 s, × 1.0793
pypy x0000_revs_xx000_added_x000_copies 08ea3258278e d9fa043f30c0 : 0.121612 s, 2.972788 s, +2.851176 s, × 24.4449
netbeans x_revs_x_added_0_copies fb0955ffcbcd a01e9239f9e7 : 0.000143 s, 0.000180 s, +0.000037 s, × 1.2587
netbeans x_revs_x000_added_0_copies 6f360122949f 20eb231cc7d0 : 0.000112 s, 0.000123 s, +0.000011 s, × 1.0982
netbeans x_revs_x_added_x_copies 1ada3faf6fb6 5a39d12eecf4 : 0.000232 s, 0.000315 s, +0.000083 s, × 1.3578
netbeans x_revs_x00_added_x_copies 35be93ba1e2c 9eec5e90c05f : 0.000721 s, 0.001297 s, +0.000576 s, × 1.7989
netbeans x000_revs_xx00_added_0_copies eac3045b4fdd 51d4ae7f1290 : 0.010115 s, 0.024884 s, +0.014769 s, × 2.4601
netbeans x000_revs_x000_added_x_copies e2063d266acd 6081d72689dc : 0.015461 s, 0.032653 s, +0.017192 s, × 2.1120
netbeans x000_revs_x000_added_x000_copies ff453e9fee32 411350406ec2 : 0.060756 s, 4.230118 s, +4.169362 s, × 69.6247
netbeans x0000_revs_xx000_added_x000_copies 588c2d1ced70 1aad62e59ddd : 0.605842 s, killed
mozilla-central x_revs_x_added_0_copies 3697f962bb7b 7015fcdd43a2 : 0.000164 s, 0.000197 s, +0.000033 s, × 1.2012
mozilla-central x_revs_x000_added_0_copies dd390860c6c9 40d0c5bed75d : 0.000331 s, 0.000622 s, +0.000291 s, × 1.8792
mozilla-central x_revs_x_added_x_copies 8d198483ae3b 14207ffc2b2f : 0.000249 s, 0.000296 s, +0.000047 s, × 1.1888
mozilla-central x_revs_x00_added_x_copies 98cbc58cc6bc 446a150332c3 : 0.000711 s, 0.001626 s, +0.000915 s, × 2.2869
mozilla-central x_revs_x000_added_x000_copies 3c684b4b8f68 0a5e72d1b479 : 0.003438 s, 0.006218 s, +0.002780 s, × 1.8086
mozilla-central x_revs_x0000_added_x0000_copies effb563bb7e5 c07a39dc4e80 : 0.069869 s, 0.132760 s, +0.062891 s, × 1.9001
mozilla-central x000_revs_xx00_added_0_copies 6100d773079a 04a55431795e : 0.005701 s, 0.029001 s, +0.023300 s, × 5.0870
mozilla-central x000_revs_x000_added_x_copies 9f17a6fc04f9 2d37b966abed : 0.005757 s, 0.005886 s, +0.000129 s, × 1.0224
mozilla-central x000_revs_x000_added_x000_copies 7c97034feb78 4407bd0c6330 : 0.061826 s, 3.619850 s, +3.558024 s, × 58.5490
mozilla-central x0000_revs_xx000_added_0_copies 9eec5917337d 67118cc6dcad : 0.043354 s, 0.058678 s, +0.015324 s, × 1.3535
mozilla-central x0000_revs_xx000_added_x000_copies f78c615a656c 96a38b690156 : 0.198979 s, 11.926587 s, +11.727608 s, × 59.9389
mozilla-central x00000_revs_x0000_added_x0000_copies 6832ae71433c 4c222a1d9a00 : 2.067096 s, killed
mozilla-central x00000_revs_x00000_added_x000_copies 76caed42cf7c 1daa622bbe42 : 3.102616 s, killed
mozilla-try x_revs_x_added_0_copies aaf6dde0deb8 9790f499805a : 0.001212 s, 0.001204 s, -0.000008 s, × 0.9934
mozilla-try x_revs_x000_added_0_copies d8d0222927b4 5bb8ce8c7450 : 0.001237 s, 0.001217 s, -0.000020 s, × 0.9838
mozilla-try x_revs_x_added_x_copies 092fcca11bdb 936255a0384a : 0.000557 s, 0.000605 s, +0.000048 s, × 1.0862
mozilla-try x_revs_x00_added_x_copies b53d2fadbdb5 017afae788ec : 0.001532 s, 0.001876 s, +0.000344 s, × 1.2245
mozilla-try x_revs_x000_added_x000_copies 20408ad61ce5 6f0ee96e21ad : 0.035166 s, 0.078190 s, +0.043024 s, × 2.2235
mozilla-try x_revs_x0000_added_x0000_copies effb563bb7e5 c07a39dc4e80 : 0.070336 s, 0.135428 s, +0.065092 s, × 1.9254
mozilla-try x000_revs_xx00_added_0_copies 6100d773079a 04a55431795e : 0.006080 s, 0.029123 s, +0.023043 s, × 4.7900
mozilla-try x000_revs_x000_added_x_copies 9f17a6fc04f9 2d37b966abed : 0.006099 s, 0.006141 s, +0.000042 s, × 1.0069
mozilla-try x000_revs_x000_added_x000_copies 1346fd0130e4 4c65cbdabc1f : 0.064317 s, 4.857827 s, +4.793510 s, × 75.5294
mozilla-try x0000_revs_x_added_0_copies 63519bfd42ee a36a2a865d92 : 0.303263 s, 10.674920 s, +10.371657 s, × 35.2002
mozilla-try x0000_revs_x_added_x_copies 9fe69ff0762d bcabf2a78927 : 0.292804 s, 9.789462 s, +9.496658 s, × 33.4335
mozilla-try x0000_revs_xx000_added_x_copies 156f6e2674f2 4d0f2c178e66 : 0.107594 s, 1.087890 s, +0.980296 s, × 10.1111
mozilla-try x0000_revs_xx000_added_0_copies 9eec5917337d 67118cc6dcad : 0.045202 s, 0.060556 s, +0.015354 s, × 1.3397
mozilla-try x0000_revs_xx000_added_x000_copies 89294cd501d9 7ccb2fc7ccb5 : 1.926277 s, killed
mozilla-try x0000_revs_x0000_added_x0000_copies e928c65095ed e951f4ad123a : 0.794492 s, killed
mozilla-try x00000_revs_x_added_0_copies 6a320851d377 1ebb79acd503 : 84.521497 s, killed
mozilla-try x00000_revs_x00000_added_0_copies dc8a3ca7010e d16fde900c9c : 0.965937 s, 19.647038 s, +18.681101 s, × 20.3399
mozilla-try x00000_revs_x_added_x_copies 5173c4b6f97c 95d83ee7242d : 83.367146 s, killed
mozilla-try x00000_revs_x000_added_x_copies 9126823d0e9c ca82787bb23c : 84.260895 s, killed
mozilla-try x00000_revs_x0000_added_x0000_copies 8d3fafa80d4b eb884023b810 : 3.274537 s, killed
mozilla-try x00000_revs_x00000_added_x0000_copies 1b661134e2ca 1ae03d022d6d : 42.235843 s, killed
mozilla-try x00000_revs_x00000_added_x000_copies 9b2a99adc05e 8e29777b48e6 : 49.872829 s, killed
Differential Revision: https://phab.mercurial-scm.org/D9299
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Thu, 01 Oct 2020 18:52:13 +0200 |
parents | 89a2afe31e82 |
children | 8b99c473aae2 |
rev | line source |
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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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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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8 from __future__ import absolute_import |
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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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17 match as matchmod, |
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18 node, |
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19 pathutil, |
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20 policy, |
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21 pycompat, |
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22 util, |
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23 ) |
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26 from .utils import stringutil |
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27 |
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28 from .revlogutils import flagutil |
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30 rustmod = policy.importrust("copy_tracing") |
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32 |
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33 def _filter(src, dst, t): |
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34 """filters out invalid copies after chaining""" |
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35 |
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36 # When _chain()'ing copies in 'a' (from 'src' via some other commit 'mid') |
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37 # with copies in 'b' (from 'mid' to 'dst'), we can get the different cases |
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38 # in the following table (not including trivial cases). For example, case 2 |
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39 # is where a file existed in 'src' and remained under that name in 'mid' and |
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40 # then was renamed between 'mid' and 'dst'. |
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41 # |
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42 # case src mid dst result |
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43 # 1 x y - - |
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44 # 2 x y y x->y |
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45 # 3 x y x - |
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46 # 4 x y z x->z |
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47 # 5 - x y - |
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48 # 6 x x y x->y |
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49 # |
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50 # _chain() takes care of chaining the copies in 'a' and 'b', but it |
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51 # cannot tell the difference between cases 1 and 2, between 3 and 4, or |
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52 # between 5 and 6, so it includes all cases in its result. |
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53 # Cases 1, 3, and 5 are then removed by _filter(). |
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54 |
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55 for k, v in list(t.items()): |
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56 # remove copies from files that didn't exist |
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57 if v not in src: |
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58 del t[k] |
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59 # remove criss-crossed copies |
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60 elif k in src and v in dst: |
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61 del t[k] |
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62 # remove copies to files that were then removed |
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63 elif k not in dst: |
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64 del t[k] |
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65 |
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66 |
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67 def _chain(prefix, suffix): |
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68 """chain two sets of copies 'prefix' and 'suffix'""" |
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69 result = prefix.copy() |
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70 for key, value in pycompat.iteritems(suffix): |
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71 result[key] = prefix.get(value, value) |
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72 return result |
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73 |
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74 |
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75 def _tracefile(fctx, am, basemf): |
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76 """return file context that is the ancestor of fctx present in ancestor |
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77 manifest am |
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78 |
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79 Note: we used to try and stop after a given limit, however checking if that |
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80 limit is reached turned out to be very expensive. we are better off |
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81 disabling that feature.""" |
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82 |
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83 for f in fctx.ancestors(): |
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84 path = f.path() |
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85 if am.get(path, None) == f.filenode(): |
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86 return path |
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87 if basemf and basemf.get(path, None) == f.filenode(): |
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88 return path |
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89 |
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90 |
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91 def _dirstatecopies(repo, match=None): |
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92 ds = repo.dirstate |
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93 c = ds.copies().copy() |
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94 for k in list(c): |
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95 if ds[k] not in b'anm' or (match and not match(k)): |
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96 del c[k] |
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97 return c |
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98 |
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99 |
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100 def _computeforwardmissing(a, b, match=None): |
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101 """Computes which files are in b but not a. |
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102 This is its own function so extensions can easily wrap this call to see what |
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103 files _forwardcopies is about to process. |
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104 """ |
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105 ma = a.manifest() |
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106 mb = b.manifest() |
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107 return mb.filesnotin(ma, match=match) |
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108 |
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109 |
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110 def usechangesetcentricalgo(repo): |
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111 """Checks if we should use changeset-centric copy algorithms""" |
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112 if repo.filecopiesmode == b'changeset-sidedata': |
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113 return True |
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114 readfrom = repo.ui.config(b'experimental', b'copies.read-from') |
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115 changesetsource = (b'changeset-only', b'compatibility') |
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116 return readfrom in changesetsource |
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117 |
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118 |
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119 def _committedforwardcopies(a, b, base, match): |
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120 """Like _forwardcopies(), but b.rev() cannot be None (working copy)""" |
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121 # files might have to be traced back to the fctx parent of the last |
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122 # one-side-only changeset, but not further back than that |
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123 repo = a._repo |
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124 |
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125 if usechangesetcentricalgo(repo): |
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126 return _changesetforwardcopies(a, b, match) |
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127 |
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128 debug = repo.ui.debugflag and repo.ui.configbool(b'devel', b'debug.copies') |
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129 dbg = repo.ui.debug |
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130 if debug: |
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131 dbg(b'debug.copies: looking into rename from %s to %s\n' % (a, b)) |
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132 am = a.manifest() |
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133 basemf = None if base is None else base.manifest() |
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134 |
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135 # find where new files came from |
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136 # we currently don't try to find where old files went, too expensive |
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137 # this means we can miss a case like 'hg rm b; hg cp a b' |
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138 cm = {} |
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139 |
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140 # Computing the forward missing is quite expensive on large manifests, since |
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141 # it compares the entire manifests. We can optimize it in the common use |
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142 # case of computing what copies are in a commit versus its parent (like |
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143 # during a rebase or histedit). Note, we exclude merge commits from this |
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144 # optimization, since the ctx.files() for a merge commit is not correct for |
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145 # this comparison. |
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146 forwardmissingmatch = match |
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147 if b.p1() == a and b.p2().node() == node.nullid: |
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148 filesmatcher = matchmod.exact(b.files()) |
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149 forwardmissingmatch = matchmod.intersectmatchers(match, filesmatcher) |
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150 missing = _computeforwardmissing(a, b, match=forwardmissingmatch) |
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151 |
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152 ancestrycontext = a._repo.changelog.ancestors([b.rev()], inclusive=True) |
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153 |
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154 if debug: |
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155 dbg(b'debug.copies: missing files to search: %d\n' % len(missing)) |
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156 |
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157 for f in sorted(missing): |
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158 if debug: |
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159 dbg(b'debug.copies: tracing file: %s\n' % f) |
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160 fctx = b[f] |
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161 fctx._ancestrycontext = ancestrycontext |
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162 |
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163 if debug: |
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164 start = util.timer() |
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165 opath = _tracefile(fctx, am, basemf) |
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166 if opath: |
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167 if debug: |
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168 dbg(b'debug.copies: rename of: %s\n' % opath) |
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169 cm[f] = opath |
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170 if debug: |
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171 dbg( |
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172 b'debug.copies: time: %f seconds\n' |
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173 % (util.timer() - start) |
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174 ) |
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175 return cm |
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176 |
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177 |
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178 def _revinfo_getter(repo): |
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179 """returns a function that returns the following data given a <rev>" |
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180 |
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181 * p1: revision number of first parent |
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182 * p2: revision number of first parent |
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183 * changes: a ChangingFiles object |
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184 """ |
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185 cl = repo.changelog |
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186 parents = cl.parentrevs |
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187 flags = cl.flags |
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188 |
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189 HASCOPIESINFO = flagutil.REVIDX_HASCOPIESINFO |
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190 |
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191 changelogrevision = cl.changelogrevision |
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192 |
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193 # A small cache to avoid doing the work twice for merges |
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194 # |
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195 # In the vast majority of cases, if we ask information for a revision |
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196 # about 1 parent, we'll later ask it for the other. So it make sense to |
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197 # keep the information around when reaching the first parent of a merge |
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198 # and dropping it after it was provided for the second parents. |
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199 # |
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200 # It exists cases were only one parent of the merge will be walked. It |
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201 # happens when the "destination" the copy tracing is descendant from a |
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202 # new root, not common with the "source". In that case, we will only walk |
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203 # through merge parents that are descendant of changesets common |
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204 # between "source" and "destination". |
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205 # |
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206 # With the current case implementation if such changesets have a copy |
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207 # information, we'll keep them in memory until the end of |
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208 # _changesetforwardcopies. We don't expect the case to be frequent |
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209 # enough to matters. |
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210 # |
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211 # In addition, it would be possible to reach pathological case, were |
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212 # many first parent are met before any second parent is reached. In |
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213 # that case the cache could grow. If this even become an issue one can |
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214 # safely introduce a maximum cache size. This would trade extra CPU/IO |
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215 # time to save memory. |
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216 merge_caches = {} |
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217 |
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218 def revinfo(rev): |
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219 p1, p2 = parents(rev) |
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220 value = None |
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221 e = merge_caches.pop(rev, None) |
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222 if e is not None: |
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223 return e |
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224 changes = None |
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225 if flags(rev) & HASCOPIESINFO: |
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226 changes = changelogrevision(rev).changes |
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227 value = (p1, p2, changes) |
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228 if p1 != node.nullrev and p2 != node.nullrev: |
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229 # XXX some case we over cache, IGNORE |
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230 merge_caches[rev] = value |
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231 return value |
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232 |
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233 return revinfo |
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234 |
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235 |
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236 def cached_is_ancestor(is_ancestor): |
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237 """return a cached version of is_ancestor""" |
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238 cache = {} |
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239 |
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240 def _is_ancestor(anc, desc): |
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241 if anc > desc: |
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242 return False |
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243 elif anc == desc: |
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244 return True |
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245 key = (anc, desc) |
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246 ret = cache.get(key) |
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247 if ret is None: |
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248 ret = cache[key] = is_ancestor(anc, desc) |
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249 return ret |
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250 |
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251 return _is_ancestor |
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252 |
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253 |
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254 def _changesetforwardcopies(a, b, match): |
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255 if a.rev() in (node.nullrev, b.rev()): |
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256 return {} |
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257 |
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258 repo = a.repo().unfiltered() |
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259 children = {} |
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260 |
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261 cl = repo.changelog |
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262 isancestor = cached_is_ancestor(cl.isancestorrev) |
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263 missingrevs = cl.findmissingrevs(common=[a.rev()], heads=[b.rev()]) |
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264 mrset = set(missingrevs) |
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265 roots = set() |
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266 for r in missingrevs: |
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267 for p in cl.parentrevs(r): |
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268 if p == node.nullrev: |
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269 continue |
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270 if p not in children: |
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271 children[p] = [r] |
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272 else: |
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273 children[p].append(r) |
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274 if p not in mrset: |
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275 roots.add(p) |
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276 if not roots: |
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277 # no common revision to track copies from |
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278 return {} |
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279 min_root = min(roots) |
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280 |
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281 from_head = set( |
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282 cl.reachableroots(min_root, [b.rev()], list(roots), includepath=True) |
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283 ) |
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284 |
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285 iterrevs = set(from_head) |
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286 iterrevs &= mrset |
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287 iterrevs.update(roots) |
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288 iterrevs.remove(b.rev()) |
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289 revs = sorted(iterrevs) |
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290 |
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291 if repo.filecopiesmode == b'changeset-sidedata': |
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292 revinfo = _revinfo_getter(repo) |
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293 return _combine_changeset_copies( |
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294 revs, children, b.rev(), revinfo, match, isancestor |
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295 ) |
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296 else: |
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297 revinfo = _revinfo_getter_extra(repo) |
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298 return _combine_changeset_copies_extra( |
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299 revs, children, b.rev(), revinfo, match, isancestor |
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300 ) |
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301 |
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302 |
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303 def _combine_changeset_copies( |
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304 revs, children, targetrev, revinfo, match, isancestor |
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305 ): |
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306 """combine the copies information for each item of iterrevs |
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307 |
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308 revs: sorted iterable of revision to visit |
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309 children: a {parent: [children]} mapping. |
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310 targetrev: the final copies destination revision (not in iterrevs) |
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311 revinfo(rev): a function that return (p1, p2, p1copies, p2copies, removed) |
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312 match: a matcher |
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313 |
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314 It returns the aggregated copies information for `targetrev`. |
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315 """ |
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316 |
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317 alwaysmatch = match.always() |
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318 |
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319 if rustmod is not None and alwaysmatch: |
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320 return rustmod.combine_changeset_copies( |
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321 list(revs), children, targetrev, revinfo, isancestor |
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322 ) |
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323 |
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324 all_copies = {} |
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325 for r in revs: |
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326 copies = all_copies.pop(r, None) |
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327 if copies is None: |
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328 # this is a root |
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329 copies = {} |
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330 for i, c in enumerate(children[r]): |
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331 p1, p2, changes = revinfo(c) |
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332 childcopies = {} |
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333 if r == p1: |
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334 parent = 1 |
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335 if changes is not None: |
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336 childcopies = changes.copied_from_p1 |
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337 else: |
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338 assert r == p2 |
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339 parent = 2 |
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340 if changes is not None: |
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341 childcopies = changes.copied_from_p2 |
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342 if not alwaysmatch: |
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343 childcopies = { |
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344 dst: src for dst, src in childcopies.items() if match(dst) |
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345 } |
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346 newcopies = copies |
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347 if childcopies: |
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348 newcopies = copies.copy() |
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349 for dest, source in pycompat.iteritems(childcopies): |
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350 prev = copies.get(source) |
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351 if prev is not None and prev[1] is not None: |
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352 source = prev[1] |
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353 newcopies[dest] = (c, source) |
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354 assert newcopies is not copies |
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355 if changes is not None: |
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356 for f in changes.removed: |
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357 if f in newcopies: |
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358 if newcopies is copies: |
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359 # copy on write to avoid affecting potential other |
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360 # branches. when there are no other branches, this |
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361 # could be avoided. |
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362 newcopies = copies.copy() |
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363 newcopies[f] = (c, None) |
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364 othercopies = all_copies.get(c) |
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365 if othercopies is None: |
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366 all_copies[c] = newcopies |
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367 else: |
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368 # we are the second parent to work on c, we need to merge our |
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369 # work with the other. |
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370 # |
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371 # In case of conflict, parent 1 take precedence over parent 2. |
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372 # This is an arbitrary choice made anew when implementing |
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373 # changeset based copies. It was made without regards with |
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374 # potential filelog related behavior. |
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375 if parent == 1: |
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376 _merge_copies_dict( |
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377 othercopies, newcopies, isancestor, changes |
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378 ) |
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379 else: |
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380 _merge_copies_dict( |
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381 newcopies, othercopies, isancestor, changes |
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382 ) |
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383 all_copies[c] = newcopies |
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384 |
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385 final_copies = {} |
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386 for dest, (tt, source) in all_copies[targetrev].items(): |
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387 if source is not None: |
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388 final_copies[dest] = source |
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389 return final_copies |
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390 |
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391 |
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392 def _merge_copies_dict(minor, major, isancestor, changes): |
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393 """merge two copies-mapping together, minor and major |
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394 |
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395 In case of conflict, value from "major" will be picked. |
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396 |
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397 - `isancestors(low_rev, high_rev)`: callable return True if `low_rev` is an |
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398 ancestors of `high_rev`, |
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399 |
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400 - `ismerged(path)`: callable return True if `path` have been merged in the |
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401 current revision, |
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402 """ |
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403 for dest, value in major.items(): |
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404 other = minor.get(dest) |
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405 if other is None: |
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406 minor[dest] = value |
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407 else: |
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408 new_tt = value[0] |
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409 other_tt = other[0] |
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410 if value[1] == other[1]: |
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411 continue |
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412 # content from "major" wins, unless it is older |
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413 # than the branch point or there is a merge |
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414 if new_tt == other_tt: |
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415 minor[dest] = value |
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416 elif ( |
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417 changes is not None |
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418 and value[1] is None |
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419 and dest in changes.salvaged |
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420 ): |
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421 pass |
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422 elif ( |
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423 changes is not None |
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424 and other[1] is None |
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425 and dest in changes.salvaged |
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426 ): |
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427 minor[dest] = value |
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428 elif changes is not None and dest in changes.merged: |
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429 minor[dest] = value |
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430 elif not isancestor(new_tt, other_tt): |
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431 if value[1] is not None: |
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432 minor[dest] = value |
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433 elif isancestor(other_tt, new_tt): |
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|
434 minor[dest] = value |
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435 |
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|
436 |
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437 def _revinfo_getter_extra(repo): |
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|
438 """return a function that return multiple data given a <rev>"i |
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|
439 |
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|
440 * p1: revision number of first parent |
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|
441 * p2: revision number of first parent |
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442 * p1copies: mapping of copies from p1 |
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|
443 * p2copies: mapping of copies from p2 |
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|
444 * removed: a list of removed files |
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|
445 * ismerged: a callback to know if file was merged in that revision |
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|
446 """ |
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|
447 cl = repo.changelog |
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|
448 parents = cl.parentrevs |
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|
449 |
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|
450 def get_ismerged(rev): |
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|
451 ctx = repo[rev] |
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452 |
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|
453 def ismerged(path): |
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|
454 if path not in ctx.files(): |
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|
455 return False |
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|
456 fctx = ctx[path] |
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|
457 parents = fctx._filelog.parents(fctx._filenode) |
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|
458 nb_parents = 0 |
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|
459 for n in parents: |
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|
460 if n != node.nullid: |
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|
461 nb_parents += 1 |
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|
462 return nb_parents >= 2 |
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|
463 |
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|
464 return ismerged |
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|
465 |
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|
466 def revinfo(rev): |
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|
467 p1, p2 = parents(rev) |
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|
468 ctx = repo[rev] |
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|
469 p1copies, p2copies = ctx._copies |
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|
470 removed = ctx.filesremoved() |
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|
471 return p1, p2, p1copies, p2copies, removed, get_ismerged(rev) |
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|
472 |
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|
473 return revinfo |
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|
474 |
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|
475 |
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|
476 def _combine_changeset_copies_extra( |
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changeset
|
477 revs, children, targetrev, revinfo, match, isancestor |
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|
478 ): |
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|
479 """version of `_combine_changeset_copies` that works with the Google |
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changeset
|
480 specific "extra" based storage for copy information""" |
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|
481 all_copies = {} |
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|
482 alwaysmatch = match.always() |
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|
483 for r in revs: |
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changeset
|
484 copies = all_copies.pop(r, None) |
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|
485 if copies is None: |
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|
486 # this is a root |
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487 copies = {} |
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488 for i, c in enumerate(children[r]): |
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489 p1, p2, p1copies, p2copies, removed, ismerged = revinfo(c) |
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490 if r == p1: |
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491 parent = 1 |
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492 childcopies = p1copies |
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493 else: |
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494 assert r == p2 |
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495 parent = 2 |
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496 childcopies = p2copies |
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497 if not alwaysmatch: |
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498 childcopies = { |
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499 dst: src for dst, src in childcopies.items() if match(dst) |
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500 } |
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501 newcopies = copies |
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502 if childcopies: |
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503 newcopies = copies.copy() |
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504 for dest, source in pycompat.iteritems(childcopies): |
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505 prev = copies.get(source) |
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506 if prev is not None and prev[1] is not None: |
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507 source = prev[1] |
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508 newcopies[dest] = (c, source) |
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509 assert newcopies is not copies |
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510 for f in removed: |
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511 if f in newcopies: |
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512 if newcopies is copies: |
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513 # copy on write to avoid affecting potential other |
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514 # branches. when there are no other branches, this |
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515 # could be avoided. |
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516 newcopies = copies.copy() |
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517 newcopies[f] = (c, None) |
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518 othercopies = all_copies.get(c) |
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519 if othercopies is None: |
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520 all_copies[c] = newcopies |
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521 else: |
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522 # we are the second parent to work on c, we need to merge our |
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523 # work with the other. |
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524 # |
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525 # In case of conflict, parent 1 take precedence over parent 2. |
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526 # This is an arbitrary choice made anew when implementing |
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527 # changeset based copies. It was made without regards with |
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528 # potential filelog related behavior. |
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529 if parent == 1: |
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530 _merge_copies_dict_extra( |
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531 othercopies, newcopies, isancestor, ismerged |
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532 ) |
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533 else: |
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534 _merge_copies_dict_extra( |
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535 newcopies, othercopies, isancestor, ismerged |
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536 ) |
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537 all_copies[c] = newcopies |
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538 |
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539 final_copies = {} |
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540 for dest, (tt, source) in all_copies[targetrev].items(): |
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|
541 if source is not None: |
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|
542 final_copies[dest] = source |
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543 return final_copies |
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544 |
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545 |
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546 def _merge_copies_dict_extra(minor, major, isancestor, ismerged): |
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|
547 """version of `_merge_copies_dict` that works with the Google |
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|
548 specific "extra" based storage for copy information""" |
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|
549 for dest, value in major.items(): |
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|
550 other = minor.get(dest) |
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551 if other is None: |
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|
552 minor[dest] = value |
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|
553 else: |
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|
554 new_tt = value[0] |
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|
555 other_tt = other[0] |
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|
556 if value[1] == other[1]: |
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|
557 continue |
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|
558 # content from "major" wins, unless it is older |
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|
559 # than the branch point or there is a merge |
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|
560 if ( |
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|
561 new_tt == other_tt |
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|
562 or not isancestor(new_tt, other_tt) |
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|
563 or ismerged(dest) |
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|
564 ): |
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|
565 minor[dest] = value |
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|
566 |
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567 |
42595
819712deac69
copies: follow copies across merge base without source file (issue6163)
Martin von Zweigbergk <martinvonz@google.com>
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|
568 def _forwardcopies(a, b, base=None, match=None): |
35422
8801cdcea01f
copies: extract method for getting non-wdir forward copies
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diff
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|
569 """find {dst@b: src@a} copy mapping where a is an ancestor of b""" |
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570 |
42595
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copies: follow copies across merge base without source file (issue6163)
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|
571 if base is None: |
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diff
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|
572 base = a |
40448
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diff
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|
573 match = a.repo().narrowmatch(match) |
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|
574 # check for working copy |
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|
575 if b.rev() is None: |
42595
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|
576 cm = _committedforwardcopies(a, b.p1(), base, match) |
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|
577 # combine copies from dirstate if necessary |
42593
11ceb1b8fd74
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Martin von Zweigbergk <martinvonz@google.com>
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|
578 copies = _chain(cm, _dirstatecopies(b._repo, match)) |
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|
579 else: |
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Augie Fackler <augie@google.com>
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580 copies = _committedforwardcopies(a, b, base, match) |
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diff
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|
581 return copies |
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diff
changeset
|
582 |
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diff
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|
583 |
41753
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Martin von Zweigbergk <martinvonz@google.com>
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diff
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|
584 def _backwardrenames(a, b, match): |
43077
687b865b95ad
formatting: byteify all mercurial/ and hgext/ string literals
Augie Fackler <augie@google.com>
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|
585 if a._repo.ui.config(b'experimental', b'copytrace') == b'off': |
26013
38f92d12357c
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|
586 return {} |
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|
587 |
18136
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Siddharth Agarwal <sid0@fb.com>
parents:
18135
diff
changeset
|
588 # Even though we're not taking copies into account, 1:n rename situations |
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589 # can still exist (e.g. hg cp a b; hg mv a c). In those cases we |
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590 # arbitrarily pick one of the renames. |
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591 # We don't want to pass in "match" here, since that would filter |
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592 # the destination by it. Since we're reversing the copies, we want |
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593 # to filter the source instead. |
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594 f = _forwardcopies(b, a) |
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595 r = {} |
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596 for k, v in sorted(pycompat.iteritems(f)): |
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597 if match and not match(v): |
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598 continue |
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599 # remove copies |
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600 if v in a: |
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601 continue |
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602 r[v] = k |
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603 return r |
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604 |
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605 |
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606 def pathcopies(x, y, match=None): |
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607 """find {dst@y: src@x} copy mapping for directed compare""" |
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608 repo = x._repo |
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609 debug = repo.ui.debugflag and repo.ui.configbool(b'devel', b'debug.copies') |
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610 if debug: |
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611 repo.ui.debug( |
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612 b'debug.copies: searching copies from %s to %s\n' % (x, y) |
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613 ) |
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614 if x == y or not x or not y: |
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615 return {} |
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616 if y.rev() is None and x == y.p1(): |
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617 if debug: |
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618 repo.ui.debug(b'debug.copies: search mode: dirstate\n') |
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619 # short-circuit to avoid issues with merge states |
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620 return _dirstatecopies(repo, match) |
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621 a = y.ancestor(x) |
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622 if a == x: |
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623 if debug: |
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624 repo.ui.debug(b'debug.copies: search mode: forward\n') |
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625 copies = _forwardcopies(x, y, match=match) |
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626 elif a == y: |
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627 if debug: |
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628 repo.ui.debug(b'debug.copies: search mode: backward\n') |
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629 copies = _backwardrenames(x, y, match=match) |
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630 else: |
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631 if debug: |
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632 repo.ui.debug(b'debug.copies: search mode: combined\n') |
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633 base = None |
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634 if a.rev() != node.nullrev: |
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635 base = x |
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636 copies = _chain( |
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637 _backwardrenames(x, a, match=match), |
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638 _forwardcopies(a, y, base, match=match), |
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639 ) |
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640 _filter(x, y, copies) |
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641 return copies |
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642 |
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643 |
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644 def mergecopies(repo, c1, c2, base): |
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645 """ |
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646 Finds moves and copies between context c1 and c2 that are relevant for |
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647 merging. 'base' will be used as the merge base. |
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648 |
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649 Copytracing is used in commands like rebase, merge, unshelve, etc to merge |
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650 files that were moved/ copied in one merge parent and modified in another. |
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651 For example: |
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652 |
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653 o ---> 4 another commit |
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654 | |
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655 | o ---> 3 commit that modifies a.txt |
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656 | / |
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657 o / ---> 2 commit that moves a.txt to b.txt |
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658 |/ |
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659 o ---> 1 merge base |
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660 |
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661 If we try to rebase revision 3 on revision 4, since there is no a.txt in |
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662 revision 4, and if user have copytrace disabled, we prints the following |
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663 message: |
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664 |
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665 ```other changed <file> which local deleted``` |
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666 |
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667 Returns a tuple where: |
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668 |
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669 "branch_copies" an instance of branch_copies. |
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670 |
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671 "diverge" is a mapping of source name -> list of destination names |
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672 for divergent renames. |
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673 |
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674 This function calls different copytracing algorithms based on config. |
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675 """ |
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676 # avoid silly behavior for update from empty dir |
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677 if not c1 or not c2 or c1 == c2: |
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678 return branch_copies(), branch_copies(), {} |
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679 |
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680 narrowmatch = c1.repo().narrowmatch() |
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681 |
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682 # avoid silly behavior for parent -> working dir |
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683 if c2.node() is None and c1.node() == repo.dirstate.p1(): |
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684 return ( |
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685 branch_copies(_dirstatecopies(repo, narrowmatch)), |
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686 branch_copies(), |
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687 {}, |
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688 ) |
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689 |
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690 copytracing = repo.ui.config(b'experimental', b'copytrace') |
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691 if stringutil.parsebool(copytracing) is False: |
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692 # stringutil.parsebool() returns None when it is unable to parse the |
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693 # value, so we should rely on making sure copytracing is on such cases |
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694 return branch_copies(), branch_copies(), {} |
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695 |
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696 if usechangesetcentricalgo(repo): |
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697 # The heuristics don't make sense when we need changeset-centric algos |
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698 return _fullcopytracing(repo, c1, c2, base) |
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|
699 |
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700 # Copy trace disabling is explicitly below the node == p1 logic above |
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|
701 # because the logic above is required for a simple copy to be kept across a |
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702 # rebase. |
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|
703 if copytracing == b'heuristics': |
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Yuya Nishihara <yuya@tcha.org>
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|
704 # Do full copytracing if only non-public revisions are involved as |
d00910b286cd
copytrace: use ctx.mutable() instead of adhoc constant of non-public phases
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|
705 # that will be fast enough and will also cover the copies which could |
d00910b286cd
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parents:
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|
706 # be missed by heuristics |
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|
707 if _isfullcopytraceable(repo, c1, base): |
34288
fc3b8483c6cb
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diff
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|
708 return _fullcopytracing(repo, c1, c2, base) |
34179
036d47d7cf39
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Pulkit Goyal <7895pulkit@gmail.com>
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diff
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|
709 return _heuristicscopytracing(repo, c1, c2, base) |
34078
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|
710 else: |
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|
711 return _fullcopytracing(repo, c1, c2, base) |
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|
712 |
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|
713 |
34311
1826d695ad58
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|
714 def _isfullcopytraceable(repo, c1, base): |
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89a2afe31e82
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Augie Fackler <raf@durin42.com>
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45892
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|
715 """Checks that if base, source and destination are all no-public branches, |
34366
d00910b286cd
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|
716 if yes let's use the full copytrace algorithm for increased capabilities |
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|
717 since it will be fast enough. |
34516
e79b3611223b
copies: add docs for config `experimental.copytrace.sourcecommitlimit`
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diff
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|
718 |
e79b3611223b
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diff
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|
719 `experimental.copytrace.sourcecommitlimit` can be used to set a limit for |
e79b3611223b
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|
720 number of changesets from c1 to base such that if number of changesets are |
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copies: add docs for config `experimental.copytrace.sourcecommitlimit`
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|
721 more than the limit, full copytracing algorithm won't be used. |
34288
fc3b8483c6cb
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diff
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|
722 """ |
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1826d695ad58
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|
723 if c1.rev() is None: |
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|
724 c1 = c1.p1() |
34366
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|
725 if c1.mutable() and base.mutable(): |
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|
726 sourcecommitlimit = repo.ui.configint( |
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|
727 b'experimental', b'copytrace.sourcecommitlimit' |
43076
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|
728 ) |
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|
729 commits = len(repo.revs(b'%d::%d', base.rev(), c1.rev())) |
34311
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|
730 return commits < sourcecommitlimit |
34288
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|
731 return False |
fc3b8483c6cb
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|
732 |
43076
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|
733 |
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|
734 def _checksinglesidecopies( |
2372284d9457
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changeset
|
735 src, dsts1, m1, m2, mb, c2, base, copy, renamedelete |
2372284d9457
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diff
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|
736 ): |
42222
57203e0210f8
copies: calculate mergecopies() based on pathcopies()
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|
737 if src not in m2: |
57203e0210f8
copies: calculate mergecopies() based on pathcopies()
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|
738 # deleted on side 2 |
57203e0210f8
copies: calculate mergecopies() based on pathcopies()
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|
739 if src not in m1: |
57203e0210f8
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diff
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|
740 # renamed on side 1, deleted on side 2 |
57203e0210f8
copies: calculate mergecopies() based on pathcopies()
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diff
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|
741 renamedelete[src] = dsts1 |
44210
d0c3eead515a
copies: fix crash when copy source is not in graft base
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diff
changeset
|
742 elif src not in mb: |
d0c3eead515a
copies: fix crash when copy source is not in graft base
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parents:
44200
diff
changeset
|
743 # Work around the "short-circuit to avoid issues with merge states" |
d0c3eead515a
copies: fix crash when copy source is not in graft base
Martin von Zweigbergk <martinvonz@google.com>
parents:
44200
diff
changeset
|
744 # thing in pathcopies(): pathcopies(x, y) can return a copy where the |
d0c3eead515a
copies: fix crash when copy source is not in graft base
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diff
changeset
|
745 # destination doesn't exist in y. |
d0c3eead515a
copies: fix crash when copy source is not in graft base
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parents:
44200
diff
changeset
|
746 pass |
44909
d452acc8cce8
flags: account for flag change when tracking rename relevant to merge
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
44276
diff
changeset
|
747 elif mb[src] != m2[src] and not _related(c2[src], base[src]): |
d452acc8cce8
flags: account for flag change when tracking rename relevant to merge
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
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diff
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|
748 return |
d452acc8cce8
flags: account for flag change when tracking rename relevant to merge
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
44276
diff
changeset
|
749 elif mb[src] != m2[src] or mb.flags(src) != m2.flags(src): |
42222
57203e0210f8
copies: calculate mergecopies() based on pathcopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
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diff
changeset
|
750 # modified on side 2 |
57203e0210f8
copies: calculate mergecopies() based on pathcopies()
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diff
changeset
|
751 for dst in dsts1: |
44237
b4057d001760
merge: when rename was made on both sides, use ancestor as merge base
Martin von Zweigbergk <martinvonz@google.com>
parents:
44210
diff
changeset
|
752 copy[dst] = src |
42222
57203e0210f8
copies: calculate mergecopies() based on pathcopies()
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parents:
42210
diff
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|
753 |
43076
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Augie Fackler <augie@google.com>
parents:
43020
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changeset
|
754 |
44199
7f8bdee0034e
copies: define a type to return from mergecopies()
Martin von Zweigbergk <martinvonz@google.com>
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diff
changeset
|
755 class branch_copies(object): |
7f8bdee0034e
copies: define a type to return from mergecopies()
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parents:
44197
diff
changeset
|
756 """Information about copies made on one side of a merge/graft. |
7f8bdee0034e
copies: define a type to return from mergecopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
44197
diff
changeset
|
757 |
7f8bdee0034e
copies: define a type to return from mergecopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
44197
diff
changeset
|
758 "copy" is a mapping from destination name -> source name, |
7f8bdee0034e
copies: define a type to return from mergecopies()
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parents:
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diff
changeset
|
759 where source is in c1 and destination is in c2 or vice-versa. |
7f8bdee0034e
copies: define a type to return from mergecopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
44197
diff
changeset
|
760 |
7f8bdee0034e
copies: define a type to return from mergecopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
44197
diff
changeset
|
761 "movewithdir" is a mapping from source name -> destination name, |
7f8bdee0034e
copies: define a type to return from mergecopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
44197
diff
changeset
|
762 where the file at source present in one context but not the other |
7f8bdee0034e
copies: define a type to return from mergecopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
44197
diff
changeset
|
763 needs to be moved to destination by the merge process, because the |
7f8bdee0034e
copies: define a type to return from mergecopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
44197
diff
changeset
|
764 other context moved the directory it is in. |
7f8bdee0034e
copies: define a type to return from mergecopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
44197
diff
changeset
|
765 |
7f8bdee0034e
copies: define a type to return from mergecopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
44197
diff
changeset
|
766 "renamedelete" is a mapping of source name -> list of destination |
7f8bdee0034e
copies: define a type to return from mergecopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
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diff
changeset
|
767 names for files deleted in c1 that were renamed in c2 or vice-versa. |
7f8bdee0034e
copies: define a type to return from mergecopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
44197
diff
changeset
|
768 |
7f8bdee0034e
copies: define a type to return from mergecopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
44197
diff
changeset
|
769 "dirmove" is a mapping of detected source dir -> destination dir renames. |
7f8bdee0034e
copies: define a type to return from mergecopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
44197
diff
changeset
|
770 This is needed for handling changes to new files previously grafted into |
7f8bdee0034e
copies: define a type to return from mergecopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
44197
diff
changeset
|
771 renamed directories. |
7f8bdee0034e
copies: define a type to return from mergecopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
44197
diff
changeset
|
772 """ |
7f8bdee0034e
copies: define a type to return from mergecopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
44197
diff
changeset
|
773 |
7f8bdee0034e
copies: define a type to return from mergecopies()
Martin von Zweigbergk <martinvonz@google.com>
parents:
44197
diff
changeset
|
774 def __init__( |
7f8bdee0034e
copies: define a type to return from mergecopies()
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parents:
44197
diff
changeset
|
775 self, copy=None, renamedelete=None, dirmove=None, movewithdir=None |
7f8bdee0034e
copies: define a type to return from mergecopies()
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parents:
44197
diff
changeset
|
776 ): |
7f8bdee0034e
copies: define a type to return from mergecopies()
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diff
changeset
|
777 self.copy = {} if copy is None else copy |
7f8bdee0034e
copies: define a type to return from mergecopies()
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parents:
44197
diff
changeset
|
778 self.renamedelete = {} if renamedelete is None else renamedelete |
7f8bdee0034e
copies: define a type to return from mergecopies()
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parents:
44197
diff
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|
779 self.dirmove = {} if dirmove is None else dirmove |
7f8bdee0034e
copies: define a type to return from mergecopies()
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diff
changeset
|
780 self.movewithdir = {} if movewithdir is None else movewithdir |
7f8bdee0034e
copies: define a type to return from mergecopies()
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parents:
44197
diff
changeset
|
781 |
44994
cfd06649a1b8
copies: implement __repr__ on branch_copies for debugging
Martin von Zweigbergk <martinvonz@google.com>
parents:
44940
diff
changeset
|
782 def __repr__(self): |
45942
89a2afe31e82
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Augie Fackler <raf@durin42.com>
parents:
45892
diff
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|
783 return '<branch_copies\n copy=%r\n renamedelete=%r\n dirmove=%r\n movewithdir=%r\n>' % ( |
89a2afe31e82
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Augie Fackler <raf@durin42.com>
parents:
45892
diff
changeset
|
784 self.copy, |
89a2afe31e82
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Augie Fackler <raf@durin42.com>
parents:
45892
diff
changeset
|
785 self.renamedelete, |
89a2afe31e82
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Augie Fackler <raf@durin42.com>
parents:
45892
diff
changeset
|
786 self.dirmove, |
89a2afe31e82
formating: upgrade to black 20.8b1
Augie Fackler <raf@durin42.com>
parents:
45892
diff
changeset
|
787 self.movewithdir, |
44994
cfd06649a1b8
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Martin von Zweigbergk <martinvonz@google.com>
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diff
changeset
|
788 ) |
cfd06649a1b8
copies: implement __repr__ on branch_copies for debugging
Martin von Zweigbergk <martinvonz@google.com>
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44940
diff
changeset
|
789 |
44199
7f8bdee0034e
copies: define a type to return from mergecopies()
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parents:
44197
diff
changeset
|
790 |
34078
b4b196092cc3
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Pulkit Goyal <7895pulkit@gmail.com>
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34077
diff
changeset
|
791 def _fullcopytracing(repo, c1, c2, base): |
45942
89a2afe31e82
formating: upgrade to black 20.8b1
Augie Fackler <raf@durin42.com>
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45892
diff
changeset
|
792 """The full copytracing algorithm which finds all the new files that were |
34078
b4b196092cc3
copytrace: move the default copytracing algorithm in a new function
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34077
diff
changeset
|
793 added from merge base up to the top commit and for each file it checks if |
b4b196092cc3
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Pulkit Goyal <7895pulkit@gmail.com>
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diff
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|
794 this file was copied from another file. |
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|
795 |
b4b196092cc3
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Pulkit Goyal <7895pulkit@gmail.com>
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changeset
|
796 This is pretty slow when a lot of changesets are involved but will track all |
b4b196092cc3
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|
797 the copies. |
b4b196092cc3
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Pulkit Goyal <7895pulkit@gmail.com>
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34077
diff
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|
798 """ |
6274
f3f383efbeae
copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
799 m1 = c1.manifest() |
f3f383efbeae
copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
parents:
diff
changeset
|
800 m2 = c2.manifest() |
30186
f7ed5af31242
mergecopies: rename 'ca' to 'base'
Pierre-Yves David <pierre-yves.david@ens-lyon.org>
parents:
30185
diff
changeset
|
801 mb = base.manifest() |
6274
f3f383efbeae
copies: move findcopies code to its own module
Matt Mackall <mpm@selenic.com>
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diff
changeset
|
802 |
42222
57203e0210f8
copies: calculate mergecopies() based on pathcopies()
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diff
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|
803 copies1 = pathcopies(base, c1) |
57203e0210f8
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Martin von Zweigbergk <martinvonz@google.com>
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diff
changeset
|
804 copies2 = pathcopies(base, c2) |
57203e0210f8
copies: calculate mergecopies() based on pathcopies()
Martin von Zweigbergk <martinvonz@google.com>
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changeset
|
805 |
44162
baf3fe2977cc
copies: move early return in mergecopies() earlier
Martin von Zweigbergk <martinvonz@google.com>
parents:
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diff
changeset
|
806 if not (copies1 or copies2): |
44200
fa9ad1da2e77
merge: start using the per-side copy dicts
Martin von Zweigbergk <martinvonz@google.com>
parents:
44199
diff
changeset
|
807 return branch_copies(), branch_copies(), {} |
44162
baf3fe2977cc
copies: move early return in mergecopies() earlier
Martin von Zweigbergk <martinvonz@google.com>
parents:
44093
diff
changeset
|
808 |
42222
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|
809 inversecopies1 = {} |
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|
810 inversecopies2 = {} |
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|
811 for dst, src in copies1.items(): |
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|
812 inversecopies1.setdefault(src, []).append(dst) |
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|
813 for dst, src in copies2.items(): |
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|
814 inversecopies2.setdefault(src, []).append(dst) |
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|
815 |
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|
816 copy1 = {} |
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|
817 copy2 = {} |
42222
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|
818 diverge = {} |
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|
819 renamedelete1 = {} |
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|
820 renamedelete2 = {} |
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|
821 allsources = set(inversecopies1) | set(inversecopies2) |
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|
822 for src in allsources: |
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|
823 dsts1 = inversecopies1.get(src) |
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|
824 dsts2 = inversecopies2.get(src) |
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|
825 if dsts1 and dsts2: |
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|
826 # copied/renamed on both sides |
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|
827 if src not in m1 and src not in m2: |
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|
828 # renamed on both sides |
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|
829 dsts1 = set(dsts1) |
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|
830 dsts2 = set(dsts2) |
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|
831 # If there's some overlap in the rename destinations, we |
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832 # consider it not divergent. For example, if side 1 copies 'a' |
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833 # to 'b' and 'c' and deletes 'a', and side 2 copies 'a' to 'c' |
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|
834 # and 'd' and deletes 'a'. |
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|
835 if dsts1 & dsts2: |
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|
836 for dst in dsts1 & dsts2: |
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|
837 copy1[dst] = src |
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|
838 copy2[dst] = src |
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|
839 else: |
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|
840 diverge[src] = sorted(dsts1 | dsts2) |
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841 elif src in m1 and src in m2: |
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|
842 # copied on both sides |
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843 dsts1 = set(dsts1) |
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|
844 dsts2 = set(dsts2) |
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|
845 for dst in dsts1 & dsts2: |
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|
846 copy1[dst] = src |
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|
847 copy2[dst] = src |
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|
848 # TODO: Handle cases where it was renamed on one side and copied |
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|
849 # on the other side |
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850 elif dsts1: |
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851 # copied/renamed only on side 1 |
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|
852 _checksinglesidecopies( |
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|
853 src, dsts1, m1, m2, mb, c2, base, copy1, renamedelete1 |
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|
854 ) |
42222
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855 elif dsts2: |
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|
856 # copied/renamed only on side 2 |
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857 _checksinglesidecopies( |
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858 src, dsts2, m2, m1, mb, c1, base, copy2, renamedelete2 |
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|
859 ) |
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860 |
26659
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|
861 # find interesting file sets from manifests |
39966
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862 addedinm1 = m1.filesnotin(mb, repo.narrowmatch()) |
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|
863 addedinm2 = m2.filesnotin(mb, repo.narrowmatch()) |
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864 u1 = sorted(addedinm1 - addedinm2) |
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865 u2 = sorted(addedinm2 - addedinm1) |
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|
866 |
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|
867 header = b" unmatched files in %s" |
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|
868 if u1: |
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|
869 repo.ui.debug(b"%s:\n %s\n" % (header % b'local', b"\n ".join(u1))) |
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|
870 if u2: |
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|
871 repo.ui.debug(b"%s:\n %s\n" % (header % b'other', b"\n ".join(u2))) |
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|
872 |
42166
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|
873 if repo.ui.debugflag: |
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874 renamedeleteset = set() |
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|
875 divergeset = set() |
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|
876 for dsts in diverge.values(): |
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|
877 divergeset.update(dsts) |
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|
878 for dsts in renamedelete1.values(): |
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879 renamedeleteset.update(dsts) |
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|
880 for dsts in renamedelete2.values(): |
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881 renamedeleteset.update(dsts) |
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882 |
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|
883 repo.ui.debug( |
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|
884 b" all copies found (* = to merge, ! = divergent, " |
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|
885 b"% = renamed and deleted):\n" |
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886 ) |
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|
887 for side, copies in ((b"local", copies1), (b"remote", copies2)): |
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|
888 if not copies: |
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|
889 continue |
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|
890 repo.ui.debug(b" on %s side:\n" % side) |
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|
891 for f in sorted(copies): |
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|
892 note = b"" |
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893 if f in copy1 or f in copy2: |
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|
894 note += b"*" |
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|
895 if f in divergeset: |
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896 note += b"!" |
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|
897 if f in renamedeleteset: |
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|
898 note += b"%" |
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|
899 repo.ui.debug( |
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900 b" src: '%s' -> dst: '%s' %s\n" % (copies[f], f, note) |
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|
901 ) |
44163
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|
902 del renamedeleteset |
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903 del divergeset |
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changeset
|
904 |
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|
905 repo.ui.debug(b" checking for directory renames\n") |
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|
906 |
44196
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|
907 dirmove1, movewithdir2 = _dir_renames(repo, c1, copy1, copies1, u2) |
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|
908 dirmove2, movewithdir1 = _dir_renames(repo, c2, copy2, copies2, u1) |
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|
909 |
44200
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|
910 branch_copies1 = branch_copies(copy1, renamedelete1, dirmove1, movewithdir1) |
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|
911 branch_copies2 = branch_copies(copy2, renamedelete2, dirmove2, movewithdir2) |
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|
912 |
44200
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changeset
|
913 return branch_copies1, branch_copies2, diverge |
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|
914 |
45192589555c
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changeset
|
915 |
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916 def _dir_renames(repo, ctx, copy, fullcopy, addedfiles): |
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917 """Finds moved directories and files that should move with them. |
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918 |
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919 ctx: the context for one of the sides |
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920 copy: files copied on the same side (as ctx) |
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921 fullcopy: files copied on the same side (as ctx), including those that |
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922 merge.manifestmerge() won't care about |
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923 addedfiles: added files on the other side (compared to ctx) |
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924 """ |
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925 # generate a directory move map |
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926 d = ctx.dirs() |
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927 invalid = set() |
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928 dirmove = {} |
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929 |
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930 # examine each file copy for a potential directory move, which is |
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931 # when all the files in a directory are moved to a new directory |
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932 for dst, src in pycompat.iteritems(fullcopy): |
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933 dsrc, ddst = pathutil.dirname(src), pathutil.dirname(dst) |
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934 if dsrc in invalid: |
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935 # already seen to be uninteresting |
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936 continue |
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937 elif dsrc in d and ddst in d: |
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938 # directory wasn't entirely moved locally |
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939 invalid.add(dsrc) |
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940 elif dsrc in dirmove and dirmove[dsrc] != ddst: |
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941 # files from the same directory moved to two different places |
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942 invalid.add(dsrc) |
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943 else: |
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944 # looks good so far |
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945 dirmove[dsrc] = ddst |
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946 |
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947 for i in invalid: |
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948 if i in dirmove: |
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949 del dirmove[i] |
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950 del d, invalid |
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951 |
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952 if not dirmove: |
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953 return {}, {} |
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954 |
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955 dirmove = {k + b"/": v + b"/" for k, v in pycompat.iteritems(dirmove)} |
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956 |
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957 for d in dirmove: |
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958 repo.ui.debug( |
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959 b" discovered dir src: '%s' -> dst: '%s'\n" % (d, dirmove[d]) |
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960 ) |
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961 |
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diff
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|
962 movewithdir = {} |
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963 # check unaccounted nonoverlapping files against directory moves |
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964 for f in addedfiles: |
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965 if f not in fullcopy: |
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966 for d in dirmove: |
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967 if f.startswith(d): |
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968 # new file added in a directory that was moved, move it |
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969 df = dirmove[d] + f[len(d) :] |
6426
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970 if df not in copy: |
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971 movewithdir[f] = df |
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972 repo.ui.debug( |
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973 b" pending file src: '%s' -> dst: '%s'\n" |
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974 % (f, df) |
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975 ) |
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976 break |
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977 |
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978 return dirmove, movewithdir |
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979 |
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980 |
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981 def _heuristicscopytracing(repo, c1, c2, base): |
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982 """Fast copytracing using filename heuristics |
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983 |
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984 Assumes that moves or renames are of following two types: |
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985 |
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986 1) Inside a directory only (same directory name but different filenames) |
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987 2) Move from one directory to another |
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988 (same filenames but different directory names) |
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989 |
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990 Works only when there are no merge commits in the "source branch". |
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991 Source branch is commits from base up to c2 not including base. |
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992 |
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993 If merge is involved it fallbacks to _fullcopytracing(). |
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994 |
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995 Can be used by setting the following config: |
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996 |
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997 [experimental] |
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998 copytrace = heuristics |
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999 |
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1000 In some cases the copy/move candidates found by heuristics can be very large |
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1001 in number and that will make the algorithm slow. The number of possible |
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1002 candidates to check can be limited by using the config |
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1003 `experimental.copytrace.movecandidateslimit` which defaults to 100. |
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1004 """ |
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1005 |
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1006 if c1.rev() is None: |
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1007 c1 = c1.p1() |
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1008 if c2.rev() is None: |
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1009 c2 = c2.p1() |
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1010 |
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1011 changedfiles = set() |
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1012 m1 = c1.manifest() |
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1013 if not repo.revs(b'%d::%d', base.rev(), c2.rev()): |
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1014 # If base is not in c2 branch, we switch to fullcopytracing |
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1015 repo.ui.debug( |
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1016 b"switching to full copytracing as base is not " |
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1017 b"an ancestor of c2\n" |
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1018 ) |
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1019 return _fullcopytracing(repo, c1, c2, base) |
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1020 |
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1021 ctx = c2 |
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1022 while ctx != base: |
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1023 if len(ctx.parents()) == 2: |
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1024 # To keep things simple let's not handle merges |
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1025 repo.ui.debug(b"switching to full copytracing because of merges\n") |
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1026 return _fullcopytracing(repo, c1, c2, base) |
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1027 changedfiles.update(ctx.files()) |
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1028 ctx = ctx.p1() |
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1029 |
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1030 copies2 = {} |
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1031 cp = _forwardcopies(base, c2) |
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1032 for dst, src in pycompat.iteritems(cp): |
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1033 if src in m1: |
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1034 copies2[dst] = src |
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1035 |
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1036 # file is missing if it isn't present in the destination, but is present in |
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1037 # the base and present in the source. |
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1038 # Presence in the base is important to exclude added files, presence in the |
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1039 # source is important to exclude removed files. |
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1040 filt = lambda f: f not in m1 and f in base and f in c2 |
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1041 missingfiles = [f for f in changedfiles if filt(f)] |
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1042 |
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1043 copies1 = {} |
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1044 if missingfiles: |
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1045 basenametofilename = collections.defaultdict(list) |
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1046 dirnametofilename = collections.defaultdict(list) |
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1047 |
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1048 for f in m1.filesnotin(base.manifest()): |
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1049 basename = os.path.basename(f) |
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1050 dirname = os.path.dirname(f) |
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1051 basenametofilename[basename].append(f) |
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1052 dirnametofilename[dirname].append(f) |
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1053 |
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1054 for f in missingfiles: |
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1055 basename = os.path.basename(f) |
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1056 dirname = os.path.dirname(f) |
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1057 samebasename = basenametofilename[basename] |
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1058 samedirname = dirnametofilename[dirname] |
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1059 movecandidates = samebasename + samedirname |
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1060 # f is guaranteed to be present in c2, that's why |
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1061 # c2.filectx(f) won't fail |
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1062 f2 = c2.filectx(f) |
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1063 # we can have a lot of candidates which can slow down the heuristics |
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1064 # config value to limit the number of candidates moves to check |
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1065 maxcandidates = repo.ui.configint( |
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1066 b'experimental', b'copytrace.movecandidateslimit' |
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1067 ) |
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1068 |
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1069 if len(movecandidates) > maxcandidates: |
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1070 repo.ui.status( |
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1071 _( |
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1072 b"skipping copytracing for '%s', more " |
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1073 b"candidates than the limit: %d\n" |
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1074 ) |
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1075 % (f, len(movecandidates)) |
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1076 ) |
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1077 continue |
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1078 |
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1079 for candidate in movecandidates: |
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1080 f1 = c1.filectx(candidate) |
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1081 if _related(f1, f2): |
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1082 # if there are a few related copies then we'll merge |
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1083 # changes into all of them. This matches the behaviour |
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1084 # of upstream copytracing |
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1085 copies1[candidate] = f |
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1086 |
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1087 return branch_copies(copies1), branch_copies(copies2), {} |
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1088 |
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1089 |
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1090 def _related(f1, f2): |
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1091 """return True if f1 and f2 filectx have a common ancestor |
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1092 |
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1093 Walk back to common ancestor to see if the two files originate |
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1094 from the same file. Since workingfilectx's rev() is None it messes |
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1095 up the integer comparison logic, hence the pre-step check for |
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1096 None (f1 and f2 can only be workingfilectx's initially). |
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1097 """ |
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1098 |
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1099 if f1 == f2: |
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1100 return True # a match |
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1101 |
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1102 g1, g2 = f1.ancestors(), f2.ancestors() |
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1103 try: |
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1104 f1r, f2r = f1.linkrev(), f2.linkrev() |
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1105 |
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1106 if f1r is None: |
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1107 f1 = next(g1) |
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1108 if f2r is None: |
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1109 f2 = next(g2) |
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1110 |
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1111 while True: |
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1112 f1r, f2r = f1.linkrev(), f2.linkrev() |
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1113 if f1r > f2r: |
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1114 f1 = next(g1) |
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1115 elif f2r > f1r: |
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1116 f2 = next(g2) |
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1117 else: # f1 and f2 point to files in the same linkrev |
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1118 return f1 == f2 # true if they point to the same file |
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1119 except StopIteration: |
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1120 return False |
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1121 |
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1122 |
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1123 def graftcopies(wctx, ctx, base): |
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1124 """reproduce copies between base and ctx in the wctx |
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1125 |
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1126 Unlike mergecopies(), this function will only consider copies between base |
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1127 and ctx; it will ignore copies between base and wctx. Also unlike |
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1128 mergecopies(), this function will apply copies to the working copy (instead |
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1129 of just returning information about the copies). That makes it cheaper |
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1130 (especially in the common case of base==ctx.p1()) and useful also when |
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1131 experimental.copytrace=off. |
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1132 |
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1133 merge.update() will have already marked most copies, but it will only |
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1134 mark copies if it thinks the source files are related (see |
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1135 merge._related()). It will also not mark copies if the file wasn't modified |
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1136 on the local side. This function adds the copies that were "missed" |
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1137 by merge.update(). |
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1138 """ |
44091
3df0bd706c40
graftcopies: use _filter() for filtering out invalid copies
Martin von Zweigbergk <martinvonz@google.com>
parents:
44090
diff
changeset
|
1139 new_copies = pathcopies(base, ctx) |
3df0bd706c40
graftcopies: use _filter() for filtering out invalid copies
Martin von Zweigbergk <martinvonz@google.com>
parents:
44090
diff
changeset
|
1140 _filter(wctx.p1(), wctx, new_copies) |
3df0bd706c40
graftcopies: use _filter() for filtering out invalid copies
Martin von Zweigbergk <martinvonz@google.com>
parents:
44090
diff
changeset
|
1141 for dst, src in pycompat.iteritems(new_copies): |
3df0bd706c40
graftcopies: use _filter() for filtering out invalid copies
Martin von Zweigbergk <martinvonz@google.com>
parents:
44090
diff
changeset
|
1142 wctx[dst].markcopied(src) |