Mercurial > hg
annotate tests/fakedirstatewritetime.py @ 30706:2e4862646f02
repair: speed up stripping of many roots
repair.strip() expects a set of root revisions to strip. It then
builds the full set of descedants by walking the descandants of
each. It is rare that more than a few roots get passed in, but if that
happens, it will wastefully walk the changelog for each root. So let's
just walk it once.
I noticed this because the narrowhg extension was passing not only
roots, but all the commits to strip. When there were tens of thousands
of commits to strip, this resulted in quadratic behavior with that
extension.
author | Martin von Zweigbergk <martinvonz@google.com> |
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date | Wed, 04 Jan 2017 10:07:12 -0800 |
parents | b38adef652fe |
children | df448de7cf3b |
rev | line source |
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1 # extension to emulate invoking 'dirstate.write()' at the time |
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2 # specified by '[fakedirstatewritetime] fakenow', only when |
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3 # 'dirstate.write()' is invoked via functions below: |
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4 # |
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5 # - 'workingctx._checklookup()' (= 'repo.status()') |
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6 # - 'committablectx.markcommitted()' |
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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, |
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12 dirstate, |
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13 extensions, |
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14 parsers, |
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15 util, |
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16 ) |
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17 |
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18 def pack_dirstate(fakenow, orig, dmap, copymap, pl, now): |
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19 # execute what original parsers.pack_dirstate should do actually |
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20 # for consistency |
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21 actualnow = int(now) |
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22 for f, e in dmap.iteritems(): |
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23 if e[0] == 'n' and e[3] == actualnow: |
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24 e = parsers.dirstatetuple(e[0], e[1], e[2], -1) |
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25 dmap[f] = e |
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26 |
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27 return orig(dmap, copymap, pl, fakenow) |
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28 |
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29 def fakewrite(ui, func): |
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30 # fake "now" of 'pack_dirstate' only if it is invoked while 'func' |
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31 |
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32 fakenow = ui.config('fakedirstatewritetime', 'fakenow') |
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33 if not fakenow: |
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34 # Execute original one, if fakenow isn't configured. This is |
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35 # useful to prevent subrepos from executing replaced one, |
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36 # because replacing 'parsers.pack_dirstate' is also effective |
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37 # in subrepos. |
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38 return func() |
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39 |
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40 # parsing 'fakenow' in YYYYmmddHHMM format makes comparison between |
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41 # 'fakenow' value and 'touch -t YYYYmmddHHMM' argument easy |
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42 fakenow = util.parsedate(fakenow, ['%Y%m%d%H%M'])[0] |
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43 |
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44 orig_pack_dirstate = parsers.pack_dirstate |
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45 orig_dirstate_getfsnow = dirstate._getfsnow |
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46 wrapper = lambda *args: pack_dirstate(fakenow, orig_pack_dirstate, *args) |
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47 |
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48 parsers.pack_dirstate = wrapper |
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49 dirstate._getfsnow = lambda *args: fakenow |
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50 try: |
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51 return func() |
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52 finally: |
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53 parsers.pack_dirstate = orig_pack_dirstate |
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54 dirstate._getfsnow = orig_dirstate_getfsnow |
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55 |
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56 def _checklookup(orig, workingctx, files): |
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57 ui = workingctx.repo().ui |
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58 return fakewrite(ui, lambda : orig(workingctx, files)) |
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59 |
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60 def markcommitted(orig, committablectx, node): |
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61 ui = committablectx.repo().ui |
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62 return fakewrite(ui, lambda : orig(committablectx, node)) |
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63 |
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64 def extsetup(ui): |
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65 extensions.wrapfunction(context.workingctx, '_checklookup', |
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66 _checklookup) |
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67 extensions.wrapfunction(context.committablectx, 'markcommitted', |
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68 markcommitted) |