annotate tests/fakedirstatewritetime.py @ 25752:815df73abf12

tests: add extension to emulate invoking dirstate.write at the specific time This extension fakes 'now' for 'parsers.pack_dirstate()' to emulate invoking 'dirstate.write()' at the specific time, only when 'dirstate.write()' is invoked via functions below: - 'workingctx._checklookup()' (= 'repo.status()') - 'committablectx.markcommitted()' This is useful to reproduce timing critical issues fixed in subsequent patches.
author FUJIWARA Katsunori <foozy@lares.dti.ne.jp>
date Wed, 08 Jul 2015 17:01:09 +0900
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children 3111b45a2bbf
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25752
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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 mercurial import context, extensions, parsers, util
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9
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10 def pack_dirstate(fakenow, orig, dmap, copymap, pl, now):
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11 # execute what original parsers.pack_dirstate should do actually
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12 # for consistency
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13 actualnow = int(now)
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14 for f, e in dmap.iteritems():
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15 if e[0] == 'n' and e[3] == actualnow:
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16 e = parsers.dirstatetuple(e[0], e[1], e[2], -1)
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17 dmap[f] = e
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18
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19 return orig(dmap, copymap, pl, fakenow)
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20
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21 def fakewrite(ui, func):
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22 # fake "now" of 'pack_dirstate' only if it is invoked while 'func'
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23
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24 fakenow = ui.config('fakedirstatewritetime', 'fakenow')
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25 if not fakenow:
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26 # Execute original one, if fakenow isn't configured. This is
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27 # useful to prevent subrepos from executing replaced one,
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28 # because replacing 'parsers.pack_dirstate' is also effective
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29 # in subrepos.
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30 return func()
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31
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32 # parsing 'fakenow' in YYYYmmddHHMM format makes comparison between
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33 # 'fakenow' value and 'touch -t YYYYmmddHHMM' argument easy
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34 timestamp = util.parsedate(fakenow, ['%Y%m%d%H%M'])[0]
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35 fakenow = float(timestamp)
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36
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37 orig_pack_dirstate = parsers.pack_dirstate
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38 wrapper = lambda *args: pack_dirstate(fakenow, orig_pack_dirstate, *args)
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39
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40 parsers.pack_dirstate = wrapper
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41 try:
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42 return func()
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43 finally:
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44 parsers.pack_dirstate = orig_pack_dirstate
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45
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46 def _checklookup(orig, workingctx, files):
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47 ui = workingctx.repo().ui
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48 return fakewrite(ui, lambda : orig(workingctx, files))
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49
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50 def markcommitted(orig, committablectx, node):
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51 ui = committablectx.repo().ui
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52 return fakewrite(ui, lambda : orig(committablectx, node))
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53
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54 def extsetup(ui):
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55 extensions.wrapfunction(context.workingctx, '_checklookup',
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56 _checklookup)
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57 extensions.wrapfunction(context.committablectx, 'markcommitted',
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58 markcommitted)