Mercurial > hg
annotate hgext/fastannotate/support.py @ 41610:d683aca738cd
diffordiffstat: avoid looking up contexts twice
I'm not worried about performance; this is just simpler.
Differential Revision: https://phab.mercurial-scm.org/D5890
author | Martin von Zweigbergk <martinvonz@google.com> |
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date | Wed, 06 Feb 2019 22:32:50 -0800 |
parents | 876494fd967d |
children | 2372284d9457 |
rev | line source |
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1 # Copyright 2016-present Facebook. All Rights Reserved. |
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2 # |
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3 # support: fastannotate support for hgweb, and filectx |
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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 context as hgcontext, |
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12 dagop, |
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13 extensions, |
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14 hgweb, |
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15 patch, |
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16 util, |
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17 ) |
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18 |
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19 from . import ( |
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20 context, |
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21 revmap, |
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22 ) |
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23 |
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24 class _lazyfctx(object): |
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25 """delegates to fctx but do not construct fctx when unnecessary""" |
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26 |
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27 def __init__(self, repo, node, path): |
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28 self._node = node |
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29 self._path = path |
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30 self._repo = repo |
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31 |
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32 def node(self): |
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33 return self._node |
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34 |
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35 def path(self): |
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36 return self._path |
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37 |
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38 @util.propertycache |
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39 def _fctx(self): |
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40 return context.resolvefctx(self._repo, self._node, self._path) |
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41 |
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42 def __getattr__(self, name): |
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43 return getattr(self._fctx, name) |
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44 |
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45 def _convertoutputs(repo, annotated, contents): |
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46 """convert fastannotate outputs to vanilla annotate format""" |
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47 # fastannotate returns: [(nodeid, linenum, path)], [linecontent] |
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48 # convert to what fctx.annotate returns: [annotateline] |
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49 results = [] |
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50 fctxmap = {} |
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51 annotateline = dagop.annotateline |
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52 for i, (hsh, linenum, path) in enumerate(annotated): |
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53 if (hsh, path) not in fctxmap: |
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54 fctxmap[(hsh, path)] = _lazyfctx(repo, hsh, path) |
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55 # linenum: the user wants 1-based, we have 0-based. |
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56 lineno = linenum + 1 |
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57 fctx = fctxmap[(hsh, path)] |
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58 line = contents[i] |
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59 results.append(annotateline(fctx=fctx, lineno=lineno, text=line)) |
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60 return results |
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61 |
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62 def _getmaster(fctx): |
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63 """(fctx) -> str""" |
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64 return fctx._repo.ui.config('fastannotate', 'mainbranch') or 'default' |
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65 |
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66 def _doannotate(fctx, follow=True, diffopts=None): |
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67 """like the vanilla fctx.annotate, but do it via fastannotate, and make |
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68 the output format compatible with the vanilla fctx.annotate. |
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69 may raise Exception, and always return line numbers. |
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70 """ |
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71 master = _getmaster(fctx) |
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72 annotated = contents = None |
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73 |
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74 with context.fctxannotatecontext(fctx, follow, diffopts) as ac: |
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75 try: |
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76 annotated, contents = ac.annotate(fctx.rev(), master=master, |
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77 showpath=True, showlines=True) |
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78 except Exception: |
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79 ac.rebuild() # try rebuild once |
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80 fctx._repo.ui.debug('fastannotate: %s: rebuilding broken cache\n' |
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81 % fctx._path) |
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82 try: |
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83 annotated, contents = ac.annotate(fctx.rev(), master=master, |
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84 showpath=True, showlines=True) |
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85 except Exception: |
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86 raise |
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87 |
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88 assert annotated and contents |
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89 return _convertoutputs(fctx._repo, annotated, contents) |
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90 |
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91 def _hgwebannotate(orig, fctx, ui): |
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92 diffopts = patch.difffeatureopts(ui, untrusted=True, |
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93 section='annotate', whitespace=True) |
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94 return _doannotate(fctx, diffopts=diffopts) |
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95 |
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96 def _fctxannotate(orig, self, follow=False, linenumber=False, skiprevs=None, |
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97 diffopts=None): |
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98 if skiprevs: |
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99 # skiprevs is not supported yet |
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100 return orig(self, follow, linenumber, skiprevs=skiprevs, |
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101 diffopts=diffopts) |
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102 try: |
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103 return _doannotate(self, follow, diffopts) |
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104 except Exception as ex: |
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105 self._repo.ui.debug('fastannotate: falling back to the vanilla ' |
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106 'annotate: %r\n' % ex) |
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107 return orig(self, follow=follow, skiprevs=skiprevs, |
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108 diffopts=diffopts) |
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109 |
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110 def _remotefctxannotate(orig, self, follow=False, skiprevs=None, diffopts=None): |
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111 # skipset: a set-like used to test if a fctx needs to be downloaded |
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112 with context.fctxannotatecontext(self, follow, diffopts) as ac: |
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113 skipset = revmap.revmap(ac.revmappath) |
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114 return orig(self, follow, skiprevs=skiprevs, diffopts=diffopts, |
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115 prefetchskip=skipset) |
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116 |
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117 def replacehgwebannotate(): |
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118 extensions.wrapfunction(hgweb.webutil, 'annotate', _hgwebannotate) |
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119 |
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120 def replacefctxannotate(): |
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121 extensions.wrapfunction(hgcontext.basefilectx, 'annotate', _fctxannotate) |