upstream/mercurial-mirror Files · tests/test-filecache.py

localrepo: strip now incrementally updates the branchheads cache...

localrepo: strip now incrementally updates the branchheads cache Destroying history via strip used to invalidate the branchheads cache, causing it to be regenerated the next time it is read. This is expensive in large repos. This change converts strip to pass info to localrepo.destroyed() to enable to it to incrementally update the cache, improving the performance of strip and other operations that depend on it (e.g., rebase). This change also strengthens a bit the integrity checking of the branchheads cache when it is read, by rejecting the cache if it has nodes in it that no longer exist.

Brodie Rao - - Load All Authors

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             test-filecache.py
        
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      import sys, os, subprocess

      if subprocess.call(['python', '%s/hghave' % os.environ['TESTDIR'],

                          'cacheable']):

          sys.exit(80)

      from mercurial import util, scmutil, extensions

      filecache = scmutil.filecache

      class fakerepo(object):

          def __init__(self):

              self._filecache = {}

          def join(self, p):

              return p

          def sjoin(self, p):

              return p

          @filecache('x')

          def cached(self):

              print 'creating'

          def invalidate(self):

              for k in self._filecache:

                  try:

                      delattr(self, k)

                  except AttributeError:

                      pass

      def basic(repo):

          # file doesn't exist, calls function

          repo.cached

          repo.invalidate()

          # file still doesn't exist, uses cache

          repo.cached

          # create empty file

          f = open('x', 'w')

          f.close()

          repo.invalidate()

          # should recreate the object

          repo.cached

          f = open('x', 'w')

          f.write('a')

          f.close()

          repo.invalidate()

          # should recreate the object

          repo.cached

          repo.invalidate()

          # stats file again, nothing changed, reuses object

          repo.cached

          # atomic replace file, size doesn't change

          # hopefully st_mtime doesn't change as well so this doesn't use the cache

          # because of inode change

          f = scmutil.opener('.')('x', 'w', atomictemp=True)

          f.write('b')

          f.close()

          repo.invalidate()

          repo.cached

      def fakeuncacheable():

          def wrapcacheable(orig, *args, **kwargs):

              return False

          def wrapinit(orig, *args, **kwargs):

              pass

          originit = extensions.wrapfunction(util.cachestat, '__init__', wrapinit)

          origcacheable = extensions.wrapfunction(util.cachestat, 'cacheable',

                                                  wrapcacheable)

          try:

              os.remove('x')

          except OSError:

              pass

          basic(fakerepo())

          util.cachestat.cacheable = origcacheable

          util.cachestat.__init__ = originit

      print 'basic:'

      print

      basic(fakerepo())

      print

      print 'fakeuncacheable:'

      print

      fakeuncacheable()

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				import sys, os, subprocess

				if subprocess.call(['python', '%s/hghave' % os.environ['TESTDIR'],
				'cacheable']):
				sys.exit(80)

				from mercurial import util, scmutil, extensions

				filecache = scmutil.filecache

				class fakerepo(object):
				def __init__(self):
				self._filecache = {}

				def join(self, p):
				return p

				def sjoin(self, p):
				return p

				@filecache('x')
				def cached(self):
				print 'creating'

				def invalidate(self):
				for k in self._filecache:
				try:
				delattr(self, k)
				except AttributeError:
				pass

				def basic(repo):
				# file doesn't exist, calls function
				repo.cached

				repo.invalidate()
				# file still doesn't exist, uses cache
				repo.cached

				# create empty file
				f = open('x', 'w')
				f.close()
				repo.invalidate()
				# should recreate the object
				repo.cached

				f = open('x', 'w')
				f.write('a')
				f.close()
				repo.invalidate()
				# should recreate the object
				repo.cached

				repo.invalidate()
				# stats file again, nothing changed, reuses object
				repo.cached

				# atomic replace file, size doesn't change
				# hopefully st_mtime doesn't change as well so this doesn't use the cache
				# because of inode change
				f = scmutil.opener('.')('x', 'w', atomictemp=True)
				f.write('b')
				f.close()

				repo.invalidate()
				repo.cached

				def fakeuncacheable():
				def wrapcacheable(orig, args, *kwargs):
				return False

				def wrapinit(orig, args, *kwargs):
				pass

				originit = extensions.wrapfunction(util.cachestat, '__init__', wrapinit)
				origcacheable = extensions.wrapfunction(util.cachestat, 'cacheable',
				wrapcacheable)

				try:
				os.remove('x')
				except OSError:
				pass

				basic(fakerepo())

				util.cachestat.cacheable = origcacheable
				util.cachestat.__init__ = originit

				print 'basic:'
				print
				basic(fakerepo())
				print
				print 'fakeuncacheable:'
				print
				fakeuncacheable()