Mercurial > hg
annotate hgext/narrow/narrowrevlog.py @ 37372:1b2fa531fd7a
narrow: move excludeddir and related classes to core
Differential Revision: https://phab.mercurial-scm.org/D3044
author | Martin von Zweigbergk <martinvonz@google.com> |
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date | Tue, 03 Apr 2018 00:13:02 -0700 |
parents | 6ff8bd691fb8 |
children | c50078fc32f3 |
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1 # narrowrevlog.py - revlog storing irrelevant nodes as "ellipsis" nodes |
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2 # |
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3 # Copyright 2017 Google, 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 |
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8 from __future__ import absolute_import |
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9 |
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10 from mercurial import ( |
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11 manifest, |
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12 revlog, |
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13 util, |
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14 ) |
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15 |
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16 def readtransform(self, text): |
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17 return text, False |
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18 |
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19 def writetransform(self, text): |
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20 return text, False |
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21 |
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22 def rawtransform(self, text): |
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23 return False |
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24 |
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25 revlog.addflagprocessor(revlog.REVIDX_ELLIPSIS, |
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26 (readtransform, writetransform, rawtransform)) |
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27 |
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28 def setup(): |
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29 # We just wanted to add the flag processor, which is done at module |
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30 # load time. |
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31 pass |
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32 |
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33 def makenarrowmanifestrevlog(mfrevlog, repo): |
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34 if util.safehasattr(mfrevlog, '_narrowed'): |
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35 return |
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36 |
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37 class narrowmanifestrevlog(mfrevlog.__class__): |
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38 # This function is called via debug{revlog,index,data}, but also during |
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39 # at least some push operations. This will be used to wrap/exclude the |
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40 # child directories when using treemanifests. |
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41 def dirlog(self, d): |
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42 if not repo.narrowmatch().visitdir(d[:-1] or '.'): |
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43 return manifest.excludedmanifestrevlog(d) |
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44 result = super(narrowmanifestrevlog, self).dirlog(d) |
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45 makenarrowmanifestrevlog(result, repo) |
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46 return result |
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47 |
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48 mfrevlog.__class__ = narrowmanifestrevlog |
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49 mfrevlog._narrowed = True |
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50 |
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51 def makenarrowmanifestlog(mfl, repo): |
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52 class narrowmanifestlog(mfl.__class__): |
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53 def get(self, dir, node, verify=True): |
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54 if not repo.narrowmatch().visitdir(dir[:-1] or '.'): |
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55 return manifest.excludeddirmanifestctx(dir, node) |
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56 return super(narrowmanifestlog, self).get(dir, node, verify=verify) |
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57 mfl.__class__ = narrowmanifestlog |
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58 |
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59 def makenarrowfilelog(fl, narrowmatch): |
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60 class narrowfilelog(fl.__class__): |
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61 def renamed(self, node): |
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62 # Renames that come from outside the narrowspec are |
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63 # problematic at least for git-diffs, because we lack the |
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64 # base text for the rename. This logic was introduced in |
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65 # 3cd72b1 of narrowhg (authored by martinvonz, reviewed by |
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66 # adgar), but that revision doesn't have any additional |
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67 # commentary on what problems we can encounter. |
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68 m = super(narrowfilelog, self).renamed(node) |
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69 if m and not narrowmatch(m[0]): |
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70 return None |
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71 return m |
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72 |
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73 def size(self, rev): |
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74 # We take advantage of the fact that remotefilelog |
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75 # lacks a node() method to just skip the |
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76 # rename-checking logic when on remotefilelog. This |
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77 # might be incorrect on other non-revlog-based storage |
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78 # engines, but for now this seems to be fine. |
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79 # |
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80 # TODO: when remotefilelog is in core, improve this to |
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81 # explicitly look for remotefilelog instead of cheating |
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82 # with a hasattr check. |
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83 if util.safehasattr(self, 'node'): |
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84 node = self.node(rev) |
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85 # Because renamed() is overridden above to |
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86 # sometimes return None even if there is metadata |
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87 # in the revlog, size can be incorrect for |
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88 # copies/renames, so we need to make sure we call |
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89 # the super class's implementation of renamed() |
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90 # for the purpose of size calculation. |
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91 if super(narrowfilelog, self).renamed(node): |
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92 return len(self.read(node)) |
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93 return super(narrowfilelog, self).size(rev) |
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94 |
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95 def cmp(self, node, text): |
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96 different = super(narrowfilelog, self).cmp(node, text) |
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97 if different: |
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98 # Similar to size() above, if the file was copied from |
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99 # a file outside the narrowspec, the super class's |
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100 # would have returned True because we tricked it into |
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101 # thinking that the file was not renamed. |
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102 if super(narrowfilelog, self).renamed(node): |
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103 t2 = self.read(node) |
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104 return t2 != text |
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105 return different |
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106 |
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107 fl.__class__ = narrowfilelog |