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@@ -0,0 +1,94 b'' | |||
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1 | # repoview.py - Filtered view of a localrepo object | |
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2 | # | |
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3 | # Copyright 2012 Pierre-Yves David <pierre-yves.david@ens-lyon.org> | |
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4 | # Logilab SA <contact@logilab.fr> | |
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5 | # | |
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6 | # This software may be used and distributed according to the terms of the | |
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7 | # GNU General Public License version 2 or any later version. | |
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8 | ||
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9 | import copy | |
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10 | ||
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11 | # function to compute filtered set | |
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12 | filtertable = {} | |
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13 | ||
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14 | def filteredrevs(repo, filtername): | |
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15 | """returns set of filtered revision for this filter name""" | |
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16 | return filtertable[filtername](repo.unfiltered()) | |
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17 | ||
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18 | class repoview(object): | |
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19 | """Provide a read/write view of a repo through a filtered changelog | |
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20 | ||
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21 | This object is used to access a filtered version of a repository without | |
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22 | altering the original repository object itself. We can not alter the | |
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23 | original object for two main reasons: | |
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24 | - It prevents the use of a repo with multiple filters at the same time. In | |
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25 | particular when multiple threads are involved. | |
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26 | - It makes scope of the filtering harder to control. | |
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27 | ||
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28 | This object behaves very closely to the original repository. All attribute | |
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29 | operations are done on the original repository: | |
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30 | - An access to `repoview.someattr` actually returns `repo.someattr`, | |
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31 | - A write to `repoview.someattr` actually sets value of `repo.someattr`, | |
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32 | - A deletion of `repoview.someattr` actually drops `someattr` | |
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33 | from `repo.__dict__`. | |
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34 | ||
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35 | The only exception is the `changelog` property. It is overridden to return | |
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36 | a (surface) copy of `repo.changelog` with some revisions filtered. The | |
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37 | `filtername` attribute of the view control the revisions that need to be | |
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38 | filtered. (the fact the changelog is copied is an implementation detail). | |
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39 | ||
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40 | Unlike attributes, this object intercepts all method calls. This means that | |
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41 | all methods are run on the `repoview` object with the filtered `changelog` | |
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42 | property. For this purpose the simple `repoview` class must be mixed with | |
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43 | the actual class of the repository. This ensures that the resulting | |
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44 | `repoview` object have the very same methods than the repo object. This | |
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45 | leads to the property below. | |
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46 | ||
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47 | repoview.method() --> repo.__class__.method(repoview) | |
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48 | ||
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49 | The inheritance has to be done dynamically because `repo` can be of any | |
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50 | subclasses of `localrepo`. Eg: `bundlerepo` or `httprepo`. | |
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51 | """ | |
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52 | ||
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53 | def __init__(self, repo, filtername): | |
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54 | object.__setattr__(self, '_unfilteredrepo', repo) | |
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55 | object.__setattr__(self, 'filtername', filtername) | |
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56 | ||
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57 | # not a cacheproperty on purpose we shall implement a proper cache later | |
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58 | @property | |
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59 | def changelog(self): | |
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60 | """return a filtered version of the changeset | |
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61 | ||
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62 | this changelog must not be used for writing""" | |
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63 | # some cache may be implemented later | |
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64 | cl = copy.copy(self._unfilteredrepo.changelog) | |
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65 | cl.filteredrevs = filteredrevs(self._unfilteredrepo, self.filtername) | |
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66 | return cl | |
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67 | ||
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68 | def unfiltered(self): | |
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69 | """Return an unfiltered version of a repo""" | |
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70 | return self._unfilteredrepo | |
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71 | ||
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72 | def filtered(self, name): | |
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73 | """Return a filtered version of a repository""" | |
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74 | if name == self.filtername: | |
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75 | return self | |
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76 | return self.unfiltered().filtered(name) | |
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77 | ||
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78 | # everything access are forwarded to the proxied repo | |
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79 | def __getattr__(self, attr): | |
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80 | return getattr(self._unfilteredrepo, attr) | |
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81 | ||
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82 | def __setattr__(self, attr, value): | |
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83 | return setattr(self._unfilteredrepo, attr, value) | |
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84 | ||
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85 | def __delattr__(self, attr): | |
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86 | return delattr(self._unfilteredrepo, attr) | |
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87 | ||
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88 | # The `requirement` attribut is initialiazed during __init__. But | |
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89 | # __getattr__ won't be called as it also exists on the class. We need | |
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90 | # explicit forwarding to main repo here | |
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91 | @property | |
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92 | def requirements(self): | |
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93 | return self._unfilteredrepo.requirements | |
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94 |
@@ -6,7 +6,7 b'' | |||
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6 | 6 | # GNU General Public License version 2 or any later version. |
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7 | 7 | from node import bin, hex, nullid, nullrev, short |
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8 | 8 | from i18n import _ |
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9 | import peer, changegroup, subrepo, discovery, pushkey, obsolete | |
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9 | import peer, changegroup, subrepo, discovery, pushkey, obsolete, repoview | |
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10 | 10 | import changelog, dirstate, filelog, manifest, context, bookmarks, phases |
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11 | 11 | import lock, transaction, store, encoding, base85 |
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12 | 12 | import scmutil, util, extensions, hook, error, revset |
@@ -303,6 +303,14 b' class localrepository(object):' | |||
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303 | 303 | Intended to be ovewritten by filtered repo.""" |
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304 | 304 | return self |
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305 | 305 | |
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306 | def filtered(self, name): | |
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307 | """Return a filtered version of a repository""" | |
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308 | # build a new class with the mixin and the current class | |
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309 | # (possibily subclass of the repo) | |
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310 | class proxycls(repoview.repoview, self.unfiltered().__class__): | |
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311 | pass | |
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312 | return proxycls(self, name) | |
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313 | ||
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306 | 314 | @repofilecache('bookmarks') |
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307 | 315 | def _bookmarks(self): |
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308 | 316 | return bookmarks.bmstore(self) |
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