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annotate rust/hg-core/src/utils/files.rs @ 45892:06b64fabf91c

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copies: cache the ancestor checking call when tracing copy A good share of the time spent in this function is spent doing ancestors checking. To avoid spending time in duplicated call, we cache the result of calls. In the slower case, this provide a quite significant performance boost. Below are the result for a set of selected pairs (many of them pathological): (And further down is another table that summarize the current state of filelog based vs changeset base copy tracing) The benchmark have been configured to be killed after 6 minutes of runtime, which mean that any detect slower than 2 minutes will be marked as "killed". This drop some useful information about how much slower these case are? but also prevent 99% of the benchmark time to be spent on case that can be labelled "very slow" anyway. Repo Case Source-Rev Dest-Rev Old-Time New-Time Difference Factor ------------------------------------------------------------------------------------------------------------------------------------ mercurial x_revs_x_added_0_copies ad6b123de1c7 39cfcef4f463 : 0.000044 s, 0.000044 s, +0.000000 s, ? 1.0000 mercurial x_revs_x_added_x_copies 2b1c78674230 0c1d10351869 : 0.000138 s, 0.000138 s, +0.000000 s, ? 1.0000 mercurial x000_revs_x000_added_x_copies 81f8ff2a9bf2 dd3267698d84 : 0.005067 s, 0.005052 s, -0.000015 s, ? 0.9970 pypy x_revs_x_added_0_copies aed021ee8ae8 099ed31b181b : 0.000218 s, 0.000219 s, +0.000001 s, ? 1.0046 pypy x_revs_x000_added_0_copies 4aa4e1f8e19a 359343b9ac0e : 0.000053 s, 0.000055 s, +0.000002 s, ? 1.0377 pypy x_revs_x_added_x_copies ac52eb7bbbb0 72e022663155 : 0.000125 s, 0.000128 s, +0.000003 s, ? 1.0240 pypy x_revs_x00_added_x_copies c3b14617fbd7 ace7255d9a26 : 0.001098 s, 0.001089 s, -0.000009 s, ? 0.9918 pypy x_revs_x000_added_x000_copies df6f7a526b60 a83dc6a2d56f : 0.017546 s, 0.017407 s, -0.000139 s, ? 0.9921 pypy x000_revs_xx00_added_0_copies 89a76aede314 2f22446ff07e : 0.096723 s, 0.094175 s, -0.002548 s, ? 0.9737 pypy x000_revs_x000_added_x_copies 8a3b5bfd266e 2c68e87c3efe : 0.271796 s, 0.238009 s, -0.033787 s, ? 0.8757 pypy x000_revs_x000_added_x000_copies 89a76aede314 7b3dda341c84 : 0.128602 s, 0.125876 s, -0.002726 s, ? 0.9788 pypy x0000_revs_x_added_0_copies d1defd0dc478 c9cb1334cc78 : 7.086742 s, 3.581556 s, -3.505186 s, ? 0.5054 pypy x0000_revs_xx000_added_0_copies bf2c629d0071 4ffed77c095c : 0.016634 s, 0.016721 s, +0.000087 s, ? 1.0052 pypy x0000_revs_xx000_added_x000_copies 08ea3258278e d9fa043f30c0 : 0.254225 s, 0.242367 s, -0.011858 s, ? 0.9534 netbeans x_revs_x_added_0_copies fb0955ffcbcd a01e9239f9e7 : 0.000166 s, 0.000165 s, -0.000001 s, ? 0.9940 netbeans x_revs_x000_added_0_copies 6f360122949f 20eb231cc7d0 : 0.000118 s, 0.000114 s, -0.000004 s, ? 0.9661 netbeans x_revs_x_added_x_copies 1ada3faf6fb6 5a39d12eecf4 : 0.000296 s, 0.000296 s, +0.000000 s, ? 1.0000 netbeans x_revs_x00_added_x_copies 35be93ba1e2c 9eec5e90c05f : 0.001137 s, 0.001124 s, -0.000013 s, ? 0.9886 netbeans x000_revs_xx00_added_0_copies eac3045b4fdd 51d4ae7f1290 : 0.014133 s, 0.013060 s, -0.001073 s, ? 0.9241 netbeans x000_revs_x000_added_x_copies e2063d266acd 6081d72689dc : 0.016988 s, 0.017112 s, +0.000124 s, ? 1.0073 netbeans x000_revs_x000_added_x000_copies ff453e9fee32 411350406ec2 : 0.676361 s, 0.660350 s, -0.016011 s, ? 0.9763 netbeans x0000_revs_xx000_added_x000_copies 588c2d1ced70 1aad62e59ddd : 12.515149 s, 10.032499 s, -2.482650 s, ? 0.8016 mozilla-central x_revs_x_added_0_copies 3697f962bb7b 7015fcdd43a2 : 0.000186 s, 0.000189 s, +0.000003 s, ? 1.0161 mozilla-central x_revs_x000_added_0_copies dd390860c6c9 40d0c5bed75d : 0.000459 s, 0.000462 s, +0.000003 s, ? 1.0065 mozilla-central x_revs_x_added_x_copies 8d198483ae3b 14207ffc2b2f : 0.000273 s, 0.000270 s, -0.000003 s, ? 0.9890 mozilla-central x_revs_x00_added_x_copies 98cbc58cc6bc 446a150332c3 : 0.001503 s, 0.001474 s, -0.000029 s, ? 0.9807 mozilla-central x_revs_x000_added_x000_copies 3c684b4b8f68 0a5e72d1b479 : 0.004862 s, 0.004806 s, -0.000056 s, ? 0.9885 mozilla-central x_revs_x0000_added_x0000_copies effb563bb7e5 c07a39dc4e80 : 0.088291 s, 0.085150 s, -0.003141 s, ? 0.9644 mozilla-central x000_revs_xx00_added_0_copies 6100d773079a 04a55431795e : 0.007113 s, 0.007064 s, -0.000049 s, ? 0.9931 mozilla-central x000_revs_x000_added_x_copies 9f17a6fc04f9 2d37b966abed : 0.004687 s, 0.004741 s, +0.000054 s, ? 1.0115 mozilla-central x000_revs_x000_added_x000_copies 7c97034feb78 4407bd0c6330 : 0.198710 s, 0.190133 s, -0.008577 s, ? 0.9568 mozilla-central x0000_revs_xx000_added_0_copies 9eec5917337d 67118cc6dcad : 0.036068 s, 0.035651 s, -0.000417 s, ? 0.9884 mozilla-central x0000_revs_xx000_added_x000_copies f78c615a656c 96a38b690156 : 0.465362 s, 0.440694 s, -0.024668 s, ? 0.9470 mozilla-central x00000_revs_x0000_added_x0000_copies 6832ae71433c 4c222a1d9a00 : 24.519684 s, 18.454163 s, -6.065521 s, ? 0.7526 mozilla-central x00000_revs_x00000_added_x000_copies 76caed42cf7c 1daa622bbe42 : 42.711897 s, 31.562719 s, -11.149178 s, ? 0.7390 mozilla-try x_revs_x_added_0_copies aaf6dde0deb8 9790f499805a : 0.001201 s, 0.001189 s, -0.000012 s, ? 0.9900 mozilla-try x_revs_x000_added_0_copies d8d0222927b4 5bb8ce8c7450 : 0.001216 s, 0.001204 s, -0.000012 s, ? 0.9901 mozilla-try x_revs_x_added_x_copies 092fcca11bdb 936255a0384a : 0.000595 s, 0.000586 s, -0.000009 s, ? 0.9849 mozilla-try x_revs_x00_added_x_copies b53d2fadbdb5 017afae788ec : 0.001856 s, 0.001845 s, -0.000011 s, ? 0.9941 mozilla-try x_revs_x000_added_x000_copies 20408ad61ce5 6f0ee96e21ad : 0.064936 s, 0.063822 s, -0.001114 s, ? 0.9828 mozilla-try x_revs_x0000_added_x0000_copies effb563bb7e5 c07a39dc4e80 : 0.090601 s, 0.088038 s, -0.002563 s, ? 0.9717 mozilla-try x000_revs_xx00_added_0_copies 6100d773079a 04a55431795e : 0.007510 s, 0.007389 s, -0.000121 s, ? 0.9839 mozilla-try x000_revs_x000_added_x_copies 9f17a6fc04f9 2d37b966abed : 0.004911 s, 0.004868 s, -0.000043 s, ? 0.9912 mozilla-try x000_revs_x000_added_x000_copies 1346fd0130e4 4c65cbdabc1f : 0.233231 s, 0.222450 s, -0.010781 s, ? 0.9538 mozilla-try x0000_revs_x_added_0_copies 63519bfd42ee a36a2a865d92 : 0.419989 s, 0.370675 s, -0.049314 s, ? 0.8826 mozilla-try x0000_revs_x_added_x_copies 9fe69ff0762d bcabf2a78927 : 0.401521 s, 0.358020 s, -0.043501 s, ? 0.8917 mozilla-try x0000_revs_xx000_added_x_copies 156f6e2674f2 4d0f2c178e66 : 0.179555 s, 0.145235 s, -0.034320 s, ? 0.8089 mozilla-try x0000_revs_xx000_added_0_copies 9eec5917337d 67118cc6dcad : 0.038004 s, 0.037606 s, -0.000398 s, ? 0.9895 mozilla-try x0000_revs_xx000_added_x000_copies 89294cd501d9 7ccb2fc7ccb5 : 52.838482 s, 7.382439 s, -45.456043 s, ? 0.1397 mozilla-try x0000_revs_x0000_added_x0000_copies e928c65095ed e951f4ad123a : 8.705874 s, 7.273506 s, -1.432368 s, ? 0.8355 mozilla-try x00000_revs_x00000_added_0_copies dc8a3ca7010e d16fde900c9c : 1.126708 s, 1.074593 s, -0.052115 s, ? 0.9537 mozilla-try x00000_revs_x0000_added_x0000_copies 8d3fafa80d4b eb884023b810 : 83.854020 s, 27.746195 s, -56.107825 s, ? 0.3309 Below is a table comparing the runtime of the current "filelog centric" algorithm, with the "changeset centric" one, we just modified. The changeset centric algorithm is a significant win in many scenario, but they are still various cases where it is quite slower. When many revision has to be considered the cost of retrieving the copy information, creating new dictionaries, merging dictionaries and checking if revision are ancestors of each other can slow things down. The rest of this series, will introduce a rust version of the copy tracing code to deal with most of theses issues. Repo Case Source-Rev Dest-Rev filelog sidedata Difference Factor --------------------------------------------------------------------------------------------------------------------------------------- mercurial x_revs_x_added_0_copies ad6b123de1c7 39cfcef4f463 : 0.000914 s, 0.000044 s, - 0.000870 s, ? 0.048140 mercurial x_revs_x_added_x_copies 2b1c78674230 0c1d10351869 : 0.001812 s, 0.000138 s, - 0.001674 s, ? 0.076159 mercurial x000_revs_x000_added_x_copies 81f8ff2a9bf2 dd3267698d84 : 0.017954 s, 0.005052 s, - 0.012902 s, ? 0.281386 pypy x_revs_x_added_0_copies aed021ee8ae8 099ed31b181b : 0.001509 s, 0.000219 s, - 0.001290 s, ? 0.145129 pypy x_revs_x000_added_0_copies 4aa4e1f8e19a 359343b9ac0e : 0.206881 s, 0.000055 s, - 0.206826 s, ? 0.000266 pypy x_revs_x_added_x_copies ac52eb7bbbb0 72e022663155 : 0.016951 s, 0.000128 s, - 0.016823 s, ? 0.007551 pypy x_revs_x00_added_x_copies c3b14617fbd7 ace7255d9a26 : 0.019096 s, 0.001089 s, - 0.018007 s, ? 0.057028 pypy x_revs_x000_added_x000_copies df6f7a526b60 a83dc6a2d56f : 0.762506 s, 0.017407 s, - 0.745099 s, ? 0.022829 pypy x000_revs_xx00_added_0_copies 89a76aede314 2f22446ff07e : 1.179211 s, 0.094175 s, - 1.085036 s, ? 0.079863 pypy x000_revs_x000_added_x_copies 8a3b5bfd266e 2c68e87c3efe : 1.249058 s, 0.238009 s, - 1.011049 s, ? 0.190551 pypy x000_revs_x000_added_x000_copies 89a76aede314 7b3dda341c84 : 1.614107 s, 0.125876 s, - 1.488231 s, ? 0.077985 pypy x0000_revs_x_added_0_copies d1defd0dc478 c9cb1334cc78 : 0.001064 s, 3.581556 s, + 3.580492 s, ? 3366.124060 pypy x0000_revs_xx000_added_0_copies bf2c629d0071 4ffed77c095c : 1.061275 s, 0.016721 s, - 1.044554 s, ? 0.015756 pypy x0000_revs_xx000_added_x000_copies 08ea3258278e d9fa043f30c0 : 1.341119 s, 0.242367 s, - 1.098752 s, ? 0.180720 netbeans x_revs_x_added_0_copies fb0955ffcbcd a01e9239f9e7 : 0.027803 s, 0.000165 s, - 0.027638 s, ? 0.005935 netbeans x_revs_x000_added_0_copies 6f360122949f 20eb231cc7d0 : 0.130014 s, 0.000114 s, - 0.129900 s, ? 0.000877 netbeans x_revs_x_added_x_copies 1ada3faf6fb6 5a39d12eecf4 : 0.024990 s, 0.000296 s, - 0.024694 s, ? 0.011845 netbeans x_revs_x00_added_x_copies 35be93ba1e2c 9eec5e90c05f : 0.052201 s, 0.001124 s, - 0.051077 s, ? 0.021532 netbeans x000_revs_xx00_added_0_copies eac3045b4fdd 51d4ae7f1290 : 0.037642 s, 0.013060 s, - 0.024582 s, ? 0.346953 netbeans x000_revs_x000_added_x_copies e2063d266acd 6081d72689dc : 0.197086 s, 0.017112 s, - 0.179974 s, ? 0.086825 netbeans x000_revs_x000_added_x000_copies ff453e9fee32 411350406ec2 : 0.935148 s, 0.660350 s, - 0.274798 s, ? 0.706145 netbeans x0000_revs_xx000_added_x000_copies 588c2d1ced70 1aad62e59ddd : 3.920674 s, 10.032499 s, + 6.111825 s, ? 2.558871 mozilla-central x_revs_x_added_0_copies 3697f962bb7b 7015fcdd43a2 : 0.024232 s, 0.000189 s, - 0.024043 s, ? 0.007800 mozilla-central x_revs_x000_added_0_copies dd390860c6c9 40d0c5bed75d : 0.141483 s, 0.000462 s, - 0.141021 s, ? 0.003265 mozilla-central x_revs_x_added_x_copies 8d198483ae3b 14207ffc2b2f : 0.025775 s, 0.000270 s, - 0.025505 s, ? 0.010475 mozilla-central x_revs_x00_added_x_copies 98cbc58cc6bc 446a150332c3 : 0.084922 s, 0.001474 s, - 0.083448 s, ? 0.017357 mozilla-central x_revs_x000_added_x000_copies 3c684b4b8f68 0a5e72d1b479 : 0.194784 s, 0.004806 s, - 0.189978 s, ? 0.024673 mozilla-central x_revs_x0000_added_x0000_copies effb563bb7e5 c07a39dc4e80 : 2.161103 s, 0.085150 s, - 2.075953 s, ? 0.039401 mozilla-central x000_revs_xx00_added_0_copies 6100d773079a 04a55431795e : 0.089347 s, 0.007064 s, - 0.082283 s, ? 0.079063 mozilla-central x000_revs_x000_added_x_copies 9f17a6fc04f9 2d37b966abed : 0.732171 s, 0.004741 s, - 0.727430 s, ? 0.006475 mozilla-central x000_revs_x000_added_x000_copies 7c97034feb78 4407bd0c6330 : 1.157287 s, 0.190133 s, - 0.967154 s, ? 0.164292 mozilla-central x0000_revs_xx000_added_0_copies 9eec5917337d 67118cc6dcad : 6.726568 s, 0.035651 s, - 6.690917 s, ? 0.005300 mozilla-central x0000_revs_xx000_added_x000_copies f78c615a656c 96a38b690156 : 3.266229 s, 0.440694 s, - 2.825535 s, ? 0.134924 mozilla-central x00000_revs_x0000_added_x0000_copies 6832ae71433c 4c222a1d9a00 : 15.860534 s, 18.454163 s, + 2.593629 s, ? 1.163527 mozilla-central x00000_revs_x00000_added_x000_copies 76caed42cf7c 1daa622bbe42 : 20.450475 s, 31.562719 s, +11.112244 s, ? 1.543373 mozilla-try x_revs_x_added_0_copies aaf6dde0deb8 9790f499805a : 0.080442 s, 0.001189 s, - 0.079253 s, ? 0.014781 mozilla-try x_revs_x000_added_0_copies d8d0222927b4 5bb8ce8c7450 : 0.497672 s, 0.001204 s, - 0.496468 s, ? 0.002419 mozilla-try x_revs_x_added_x_copies 092fcca11bdb 936255a0384a : 0.021183 s, 0.000586 s, - 0.020597 s, ? 0.027664 mozilla-try x_revs_x00_added_x_copies b53d2fadbdb5 017afae788ec : 0.230991 s, 0.001845 s, - 0.229146 s, ? 0.007987 mozilla-try x_revs_x000_added_x000_copies 20408ad61ce5 6f0ee96e21ad : 1.118461 s, 0.063822 s, - 1.054639 s, ? 0.057062 mozilla-try x_revs_x0000_added_x0000_copies effb563bb7e5 c07a39dc4e80 : 2.206083 s, 0.088038 s, - 2.118045 s, ? 0.039907 mozilla-try x000_revs_xx00_added_0_copies 6100d773079a 04a55431795e : 0.089404 s, 0.007389 s, - 0.082015 s, ? 0.082647 mozilla-try x000_revs_x000_added_x_copies 9f17a6fc04f9 2d37b966abed : 0.733043 s, 0.004868 s, - 0.728175 s, ? 0.006641 mozilla-try x000_revs_x000_added_x000_copies 1346fd0130e4 4c65cbdabc1f : 1.163367 s, 0.222450 s, - 0.940917 s, ? 0.191212 mozilla-try x0000_revs_x_added_0_copies 63519bfd42ee a36a2a865d92 : 0.085456 s, 0.370675 s, + 0.285219 s, ? 4.337612 mozilla-try x0000_revs_x_added_x_copies 9fe69ff0762d bcabf2a78927 : 0.083601 s, 0.358020 s, + 0.274419 s, ? 4.282485 mozilla-try x0000_revs_xx000_added_x_copies 156f6e2674f2 4d0f2c178e66 : 7.366614 s, 0.145235 s, - 7.221379 s, ? 0.019715 mozilla-try x0000_revs_xx000_added_0_copies 9eec5917337d 67118cc6dcad : 6.664464 s, 0.037606 s, - 6.626858 s, ? 0.005643 mozilla-try x0000_revs_xx000_added_x000_copies 89294cd501d9 7ccb2fc7ccb5 : 7.467836 s, 7.382439 s, - 0.085397 s, ? 0.988565 mozilla-try x0000_revs_x0000_added_x0000_copies e928c65095ed e951f4ad123a : 9.801294 s, 7.273506 s, - 2.527788 s, ? 0.742097 mozilla-try x00000_revs_x_added_0_copies 6a320851d377 1ebb79acd503 : 0.091886 s, killed mozilla-try x00000_revs_x00000_added_0_copies dc8a3ca7010e d16fde900c9c : 26.491140 s, 1.074593 s, -25.416547 s, ? 0.040564 mozilla-try x00000_revs_x_added_x_copies 5173c4b6f97c 95d83ee7242d : 0.092863 s, killed mozilla-try x00000_revs_x000_added_x_copies 9126823d0e9c ca82787bb23c : 0.226823 s, killed mozilla-try x00000_revs_x0000_added_x0000_copies 8d3fafa80d4b eb884023b810 : 18.914630 s, 27.746195 s, + 8.831565 s, ? 1.466917 mozilla-try x00000_revs_x00000_added_x0000_copies 1b661134e2ca 1ae03d022d6d : 21.198903 s, killed mozilla-try x00000_revs_x00000_added_x000_copies 9b2a99adc05e 8e29777b48e6 : 24.952268 s, killed Differential Revision: https://phab.mercurial-scm.org/D9296
author Pierre-Yves David <pierre-yves.david@octobus.net>
date Mon, 02 Nov 2020 11:03:56 +0100
parents 1b3197047f5c
children 95d6f31e88db
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 // files.rs
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2 //
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3 // Copyright 2019
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4 // Raphaël Gomès <rgomes@octobus.net>,
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5 // Yuya Nishihara <yuya@tcha.org>
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6 //
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7 // This software may be used and distributed according to the terms of the
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8 // GNU General Public License version 2 or any later version.
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9
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10 //! Functions for fiddling with files.
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11
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12 use crate::utils::{
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13 hg_path::{path_to_hg_path_buf, HgPath, HgPathBuf, HgPathError},
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14 path_auditor::PathAuditor,
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15 replace_slice,
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16 };
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17 use lazy_static::lazy_static;
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18 use same_file::is_same_file;
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19 use std::borrow::{Cow, ToOwned};
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20 use std::fs::Metadata;
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21 use std::iter::FusedIterator;
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22 use std::ops::Deref;
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23 use std::path::{Path, PathBuf};
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24
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25 pub fn get_path_from_bytes(bytes: &[u8]) -> &Path {
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26 let os_str;
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27 #[cfg(unix)]
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28 {
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29 use std::os::unix::ffi::OsStrExt;
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30 os_str = std::ffi::OsStr::from_bytes(bytes);
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31 }
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32 // TODO Handle other platforms
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33 // TODO: convert from WTF8 to Windows MBCS (ANSI encoding).
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34 // Perhaps, the return type would have to be Result<PathBuf>.
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35
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36 Path::new(os_str)
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37 }
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38
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39 // TODO: need to convert from WTF8 to MBCS bytes on Windows.
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40 // that's why Vec<u8> is returned.
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41 #[cfg(unix)]
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42 pub fn get_bytes_from_path(path: impl AsRef<Path>) -> Vec<u8> {
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43 use std::os::unix::ffi::OsStrExt;
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44 path.as_ref().as_os_str().as_bytes().to_vec()
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45 }
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46
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47 /// An iterator over repository path yielding itself and its ancestors.
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48 #[derive(Copy, Clone, Debug)]
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49 pub struct Ancestors<'a> {
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50 next: Option<&'a HgPath>,
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51 }
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52
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53 impl<'a> Iterator for Ancestors<'a> {
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54 type Item = &'a HgPath;
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55
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56 fn next(&mut self) -> Option<Self::Item> {
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57 let next = self.next;
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58 self.next = match self.next {
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59 Some(s) if s.is_empty() => None,
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60 Some(s) => {
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61 let p = s.bytes().rposition(|c| *c == b'/').unwrap_or(0);
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62 Some(HgPath::new(&s.as_bytes()[..p]))
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63 }
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64 None => None,
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65 };
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66 next
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67 }
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68 }
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69
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70 impl<'a> FusedIterator for Ancestors<'a> {}
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71
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72 /// An iterator over repository path yielding itself and its ancestors.
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73 #[derive(Copy, Clone, Debug)]
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74 pub(crate) struct AncestorsWithBase<'a> {
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75 next: Option<(&'a HgPath, &'a HgPath)>,
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76 }
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77
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78 impl<'a> Iterator for AncestorsWithBase<'a> {
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79 type Item = (&'a HgPath, &'a HgPath);
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80
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81 fn next(&mut self) -> Option<Self::Item> {
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82 let next = self.next;
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83 self.next = match self.next {
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84 Some((s, _)) if s.is_empty() => None,
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85 Some((s, _)) => Some(s.split_filename()),
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86 None => None,
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87 };
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88 next
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89 }
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90 }
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91
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92 impl<'a> FusedIterator for AncestorsWithBase<'a> {}
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93
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94 /// Returns an iterator yielding ancestor directories of the given repository
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95 /// path.
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96 ///
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97 /// The path is separated by '/', and must not start with '/'.
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98 ///
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99 /// The path itself isn't included unless it is b"" (meaning the root
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100 /// directory.)
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101 pub fn find_dirs(path: &HgPath) -> Ancestors {
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102 let mut dirs = Ancestors { next: Some(path) };
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103 if !path.is_empty() {
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104 dirs.next(); // skip itself
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105 }
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106 dirs
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107 }
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108
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109 /// Returns an iterator yielding ancestor directories of the given repository
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110 /// path.
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111 ///
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112 /// The path is separated by '/', and must not start with '/'.
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113 ///
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114 /// The path itself isn't included unless it is b"" (meaning the root
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115 /// directory.)
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116 pub(crate) fn find_dirs_with_base(path: &HgPath) -> AncestorsWithBase {
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117 let mut dirs = AncestorsWithBase {
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118 next: Some((path, HgPath::new(b""))),
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119 };
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120 if !path.is_empty() {
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121 dirs.next(); // skip itself
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122 }
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123 dirs
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124 }
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125
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126 /// TODO more than ASCII?
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127 pub fn normalize_case(path: &HgPath) -> HgPathBuf {
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128 #[cfg(windows)] // NTFS compares via upper()
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129 return path.to_ascii_uppercase();
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130 #[cfg(unix)]
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131 path.to_ascii_lowercase()
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132 }
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133
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134 lazy_static! {
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135 static ref IGNORED_CHARS: Vec<Vec<u8>> = {
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136 [
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137 0x200c, 0x200d, 0x200e, 0x200f, 0x202a, 0x202b, 0x202c, 0x202d,
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138 0x202e, 0x206a, 0x206b, 0x206c, 0x206d, 0x206e, 0x206f, 0xfeff,
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139 ]
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140 .iter()
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141 .map(|code| {
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142 std::char::from_u32(*code)
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143 .unwrap()
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144 .encode_utf8(&mut [0; 3])
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145 .bytes()
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146 .collect()
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147 })
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148 .collect()
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149 };
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150 }
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151
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152 fn hfs_ignore_clean(bytes: &[u8]) -> Vec<u8> {
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153 let mut buf = bytes.to_owned();
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154 let needs_escaping = bytes.iter().any(|b| *b == b'\xe2' || *b == b'\xef');
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155 if needs_escaping {
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156 for forbidden in IGNORED_CHARS.iter() {
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157 replace_slice(&mut buf, forbidden, &[])
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158 }
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159 buf
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160 } else {
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161 buf
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162 }
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163 }
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164
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165 pub fn lower_clean(bytes: &[u8]) -> Vec<u8> {
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166 hfs_ignore_clean(&bytes.to_ascii_lowercase())
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167 }
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168
43271
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169 #[derive(Eq, PartialEq, Ord, PartialOrd, Copy, Clone)]
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170 pub struct HgMetadata {
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171 pub st_dev: u64,
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172 pub st_mode: u32,
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173 pub st_nlink: u64,
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174 pub st_size: u64,
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175 pub st_mtime: i64,
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176 pub st_ctime: i64,
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177 }
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178
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179 // TODO support other plaforms
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180 #[cfg(unix)]
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181 impl HgMetadata {
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182 pub fn from_metadata(metadata: Metadata) -> Self {
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183 use std::os::unix::fs::MetadataExt;
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184 Self {
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185 st_dev: metadata.dev(),
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186 st_mode: metadata.mode(),
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187 st_nlink: metadata.nlink(),
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188 st_size: metadata.size(),
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189 st_mtime: metadata.mtime(),
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190 st_ctime: metadata.ctime(),
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191 }
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192 }
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193 }
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194
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195 /// Returns the canonical path of `name`, given `cwd` and `root`
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196 pub fn canonical_path(
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197 root: impl AsRef<Path>,
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198 cwd: impl AsRef<Path>,
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199 name: impl AsRef<Path>,
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200 ) -> Result<PathBuf, HgPathError> {
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201 // TODO add missing normalization for other platforms
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202 let root = root.as_ref();
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203 let cwd = cwd.as_ref();
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204 let name = name.as_ref();
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205
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206 let name = if !name.is_absolute() {
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207 root.join(&cwd).join(&name)
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208 } else {
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209 name.to_owned()
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210 };
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211 let auditor = PathAuditor::new(&root);
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212 if name != root && name.starts_with(&root) {
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213 let name = name.strip_prefix(&root).unwrap();
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214 auditor.audit_path(path_to_hg_path_buf(name)?)?;
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215 Ok(name.to_owned())
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216 } else if name == root {
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217 Ok("".into())
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218 } else {
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219 // Determine whether `name' is in the hierarchy at or beneath `root',
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220 // by iterating name=name.parent() until it returns `None` (can't
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221 // check name == '/', because that doesn't work on windows).
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222 let mut name = name.deref();
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223 let original_name = name.to_owned();
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224 loop {
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225 let same = is_same_file(&name, &root).unwrap_or(false);
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226 if same {
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227 if name == original_name {
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228 // `name` was actually the same as root (maybe a symlink)
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229 return Ok("".into());
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230 }
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231 // `name` is a symlink to root, so `original_name` is under
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232 // root
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233 let rel_path = original_name.strip_prefix(&name).unwrap();
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234 auditor.audit_path(path_to_hg_path_buf(&rel_path)?)?;
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235 return Ok(rel_path.to_owned());
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236 }
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237 name = match name.parent() {
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238 None => break,
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239 Some(p) => p,
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240 };
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241 }
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242 // TODO hint to the user about using --cwd
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243 // Bubble up the responsibility to Python for now
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244 Err(HgPathError::NotUnderRoot {
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245 path: original_name.to_owned(),
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246 root: root.to_owned(),
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247 })
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248 }
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249 }
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250
45436
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251 /// Returns the representation of the path relative to the current working
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252 /// directory for display purposes.
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253 ///
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254 /// `cwd` is a `HgPath`, so it is considered relative to the root directory
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255 /// of the repository.
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256 ///
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257 /// # Examples
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258 ///
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259 /// ```
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260 /// use hg::utils::hg_path::HgPath;
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261 /// use hg::utils::files::relativize_path;
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262 /// use std::borrow::Cow;
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263 ///
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264 /// let file = HgPath::new(b"nested/file");
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265 /// let cwd = HgPath::new(b"");
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266 /// assert_eq!(relativize_path(file, cwd), Cow::Borrowed(b"nested/file"));
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267 ///
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268 /// let cwd = HgPath::new(b"nested");
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269 /// assert_eq!(relativize_path(file, cwd), Cow::Borrowed(b"file"));
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270 ///
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271 /// let cwd = HgPath::new(b"other");
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272 /// assert_eq!(relativize_path(file, cwd), Cow::Borrowed(b"../nested/file"));
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273 /// ```
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274 pub fn relativize_path(path: &HgPath, cwd: impl AsRef<HgPath>) -> Cow<[u8]> {
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275 if cwd.as_ref().is_empty() {
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276 Cow::Borrowed(path.as_bytes())
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277 } else {
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278 let mut res: Vec<u8> = Vec::new();
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279 let mut path_iter = path.as_bytes().split(|b| *b == b'/').peekable();
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280 let mut cwd_iter =
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281 cwd.as_ref().as_bytes().split(|b| *b == b'/').peekable();
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282 loop {
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283 match (path_iter.peek(), cwd_iter.peek()) {
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284 (Some(a), Some(b)) if a == b => (),
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285 _ => break,
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286 }
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287 path_iter.next();
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288 cwd_iter.next();
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289 }
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290 let mut need_sep = false;
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291 for _ in cwd_iter {
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292 if need_sep {
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293 res.extend(b"/")
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294 } else {
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295 need_sep = true
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296 };
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297 res.extend(b"..");
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298 }
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299 for c in path_iter {
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300 if need_sep {
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301 res.extend(b"/")
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302 } else {
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303 need_sep = true
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304 };
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305 res.extend(c);
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306 }
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307 Cow::Owned(res)
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308 }
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309 }
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310
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311 #[cfg(test)]
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312 mod tests {
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313 use super::*;
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314 use pretty_assertions::assert_eq;
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315
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316 #[test]
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317 fn find_dirs_some() {
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318 let mut dirs = super::find_dirs(HgPath::new(b"foo/bar/baz"));
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319 assert_eq!(dirs.next(), Some(HgPath::new(b"foo/bar")));
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320 assert_eq!(dirs.next(), Some(HgPath::new(b"foo")));
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321 assert_eq!(dirs.next(), Some(HgPath::new(b"")));
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322 assert_eq!(dirs.next(), None);
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323 assert_eq!(dirs.next(), None);
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324 }
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325
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326 #[test]
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327 fn find_dirs_empty() {
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328 // looks weird, but mercurial.pathutil.finddirs(b"") yields b""
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329 let mut dirs = super::find_dirs(HgPath::new(b""));
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330 assert_eq!(dirs.next(), Some(HgPath::new(b"")));
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331 assert_eq!(dirs.next(), None);
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332 assert_eq!(dirs.next(), None);
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333 }
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334
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335 #[test]
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336 fn test_find_dirs_with_base_some() {
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337 let mut dirs = super::find_dirs_with_base(HgPath::new(b"foo/bar/baz"));
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338 assert_eq!(
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339 dirs.next(),
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340 Some((HgPath::new(b"foo/bar"), HgPath::new(b"baz")))
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341 );
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342 assert_eq!(
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343 dirs.next(),
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344 Some((HgPath::new(b"foo"), HgPath::new(b"bar")))
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345 );
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346 assert_eq!(dirs.next(), Some((HgPath::new(b""), HgPath::new(b"foo"))));
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347 assert_eq!(dirs.next(), None);
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348 assert_eq!(dirs.next(), None);
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349 }
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350
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351 #[test]
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352 fn test_find_dirs_with_base_empty() {
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353 let mut dirs = super::find_dirs_with_base(HgPath::new(b""));
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354 assert_eq!(dirs.next(), Some((HgPath::new(b""), HgPath::new(b""))));
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355 assert_eq!(dirs.next(), None);
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356 assert_eq!(dirs.next(), None);
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357 }
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358
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359 #[test]
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360 fn test_canonical_path() {
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361 let root = Path::new("/repo");
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362 let cwd = Path::new("/dir");
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363 let name = Path::new("filename");
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364 assert_eq!(
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365 canonical_path(root, cwd, name),
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366 Err(HgPathError::NotUnderRoot {
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367 path: PathBuf::from("/dir/filename"),
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368 root: root.to_path_buf()
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369 })
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370 );
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371
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372 let root = Path::new("/repo");
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373 let cwd = Path::new("/");
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374 let name = Path::new("filename");
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375 assert_eq!(
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376 canonical_path(root, cwd, name),
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377 Err(HgPathError::NotUnderRoot {
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378 path: PathBuf::from("/filename"),
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379 root: root.to_path_buf()
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380 })
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381 );
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382
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383 let root = Path::new("/repo");
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384 let cwd = Path::new("/");
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385 let name = Path::new("repo/filename");
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386 assert_eq!(
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387 canonical_path(root, cwd, name),
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388 Ok(PathBuf::from("filename"))
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389 );
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390
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391 let root = Path::new("/repo");
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392 let cwd = Path::new("/repo");
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393 let name = Path::new("filename");
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394 assert_eq!(
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395 canonical_path(root, cwd, name),
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396 Ok(PathBuf::from("filename"))
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397 );
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398
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399 let root = Path::new("/repo");
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400 let cwd = Path::new("/repo/subdir");
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401 let name = Path::new("filename");
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402 assert_eq!(
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403 canonical_path(root, cwd, name),
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404 Ok(PathBuf::from("subdir/filename"))
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405 );
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406 }
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407
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408 #[test]
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409 fn test_canonical_path_not_rooted() {
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410 use std::fs::create_dir;
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411 use tempfile::tempdir;
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412
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413 let base_dir = tempdir().unwrap();
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414 let base_dir_path = base_dir.path();
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415 let beneath_repo = base_dir_path.join("a");
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416 let root = base_dir_path.join("a/b");
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417 let out_of_repo = base_dir_path.join("c");
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418 let under_repo_symlink = out_of_repo.join("d");
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419
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420 create_dir(&beneath_repo).unwrap();
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421 create_dir(&root).unwrap();
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422
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423 // TODO make portable
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424 std::os::unix::fs::symlink(&root, &out_of_repo).unwrap();
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425
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426 assert_eq!(
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427 canonical_path(&root, Path::new(""), out_of_repo),
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428 Ok(PathBuf::from(""))
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429 );
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430 assert_eq!(
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431 canonical_path(&root, Path::new(""), &beneath_repo),
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432 Err(HgPathError::NotUnderRoot {
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433 path: beneath_repo.to_owned(),
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434 root: root.to_owned()
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435 })
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436 );
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437 assert_eq!(
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438 canonical_path(&root, Path::new(""), &under_repo_symlink),
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439 Ok(PathBuf::from("d"))
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440 );
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441 }
42586
cad3dde7a573 rust-dirstate: add helper to iterate ancestor paths
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442 }