Mercurial > hg
annotate hgext/automv.py @ 46192:25d11b24dedf
upgrade: move printing of unused optimizations to UpgradeOperation class
Differential Revision: https://phab.mercurial-scm.org/D9578
author | Pulkit Goyal <7895pulkit@gmail.com> |
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date | Mon, 14 Dec 2020 13:48:25 +0530 |
parents | 89a2afe31e82 |
children | 6000f5b25c9b |
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1 # automv.py |
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2 # |
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3 # Copyright 2013-2016 Facebook, Inc. |
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4 # |
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5 # This software may be used and distributed according to the terms of the |
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6 # GNU General Public License version 2 or any later version. |
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7 """check for unrecorded moves at commit time (EXPERIMENTAL) |
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8 |
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9 This extension checks at commit/amend time if any of the committed files |
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10 comes from an unrecorded mv. |
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11 |
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12 The threshold at which a file is considered a move can be set with the |
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13 ``automv.similarity`` config option. This option takes a percentage between 0 |
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14 (disabled) and 100 (files must be identical), the default is 95. |
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15 |
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16 """ |
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17 |
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18 # Using 95 as a default similarity is based on an analysis of the mercurial |
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19 # repositories of the cpython, mozilla-central & mercurial repositories, as |
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20 # well as 2 very large facebook repositories. At 95 50% of all potential |
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21 # missed moves would be caught, as well as correspond with 87% of all |
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22 # explicitly marked moves. Together, 80% of moved files are 95% similar or |
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23 # more. |
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24 # |
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25 # See http://markmail.org/thread/5pxnljesvufvom57 for context. |
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26 |
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27 from __future__ import absolute_import |
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28 |
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29 from mercurial.i18n import _ |
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30 from mercurial import ( |
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31 commands, |
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32 copies, |
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33 error, |
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34 extensions, |
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35 pycompat, |
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36 registrar, |
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37 scmutil, |
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38 similar, |
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39 ) |
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40 |
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41 configtable = {} |
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42 configitem = registrar.configitem(configtable) |
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43 |
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44 configitem( |
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45 b'automv', |
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46 b'similarity', |
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47 default=95, |
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48 ) |
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49 |
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50 |
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51 def extsetup(ui): |
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52 entry = extensions.wrapcommand(commands.table, b'commit', mvcheck) |
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53 entry[1].append( |
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54 (b'', b'no-automv', None, _(b'disable automatic file move detection')) |
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55 ) |
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56 |
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57 |
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58 def mvcheck(orig, ui, repo, *pats, **opts): |
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59 """Hook to check for moves at commit time""" |
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60 opts = pycompat.byteskwargs(opts) |
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61 renames = None |
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62 disabled = opts.pop(b'no_automv', False) |
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63 if not disabled: |
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64 threshold = ui.configint(b'automv', b'similarity') |
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65 if not 0 <= threshold <= 100: |
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66 raise error.Abort(_(b'automv.similarity must be between 0 and 100')) |
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67 if threshold > 0: |
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68 match = scmutil.match(repo[None], pats, opts) |
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69 added, removed = _interestingfiles(repo, match) |
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70 uipathfn = scmutil.getuipathfn(repo, legacyrelativevalue=True) |
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71 renames = _findrenames( |
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72 repo, uipathfn, added, removed, threshold / 100.0 |
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73 ) |
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74 |
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75 with repo.wlock(): |
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76 if renames is not None: |
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77 scmutil._markchanges(repo, (), (), renames) |
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78 return orig(ui, repo, *pats, **pycompat.strkwargs(opts)) |
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79 |
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80 |
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81 def _interestingfiles(repo, matcher): |
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82 """Find what files were added or removed in this commit. |
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83 |
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84 Returns a tuple of two lists: (added, removed). Only files not *already* |
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85 marked as moved are included in the added list. |
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86 |
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87 """ |
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88 stat = repo.status(match=matcher) |
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89 added = stat.added |
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90 removed = stat.removed |
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91 |
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92 copy = copies.pathcopies(repo[b'.'], repo[None], matcher) |
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93 # remove the copy files for which we already have copy info |
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94 added = [f for f in added if f not in copy] |
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95 |
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96 return added, removed |
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97 |
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98 |
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99 def _findrenames(repo, uipathfn, added, removed, similarity): |
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100 """Find what files in added are really moved files. |
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101 |
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102 Any file named in removed that is at least similarity% similar to a file |
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103 in added is seen as a rename. |
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104 |
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105 """ |
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106 renames = {} |
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107 if similarity > 0: |
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108 for src, dst, score in similar.findrenames( |
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109 repo, added, removed, similarity |
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110 ): |
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111 if repo.ui.verbose: |
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112 repo.ui.status( |
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113 _(b'detected move of %s as %s (%d%% similar)\n') |
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114 % (uipathfn(src), uipathfn(dst), score * 100) |
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115 ) |
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116 renames[dst] = src |
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117 if renames: |
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118 repo.ui.status(_(b'detected move of %d files\n') % len(renames)) |
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119 return renames |