upstream/mercurial-mirror Files · hgext/git/gitutil.py

phases: avoid a potentially costly dictionary interation in some case...

phases: avoid a potentially costly dictionary interation in some case If we retract for the draft phase, there is not non-public item to be retracted and we can skip this part. This part is was apparently super costly thanks to Python. On mozilla-try-2019-02-18, a perf::unbundle call with a 10 000 changesets bundle gives give use the following timing. e57d4b868a3e: 4.6 seconds ac1c75188440: 102.5 seconds this-changeset: 30.0 seconds So we recovered about ⅔ of the regression, the next changeset will give us the rest back.

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      """utilities to assist in working with pygit2"""

      from mercurial.node import bin, sha1nodeconstants

      pygit2_module = None

      def get_pygit2():

          global pygit2_module

          if pygit2_module is None:

              try:

                  import pygit2 as pygit2_module  # pytype: disable=import-error

                  pygit2_module.InvalidSpecError

              except (ImportError, AttributeError):

                  pass

          return pygit2_module

      def pygit2_version():

          mod = get_pygit2()

          v = "N/A"

          if mod:

              try:

                  v = mod.__version__

              except AttributeError:

                  pass

          return b"(pygit2 %s)" % v.encode("utf-8")

      def togitnode(n):

          """Wrapper to convert a Mercurial binary node to a unicode hexlified node.

          pygit2 and sqlite both need nodes as strings, not bytes.

          """

          assert len(n) == 20

          return n.hex()

      def fromgitnode(n):

          """Opposite of togitnode."""

          assert len(n) == 40

          return bin(n)

      nullgit = togitnode(sha1nodeconstants.nullid)

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				"""utilities to assist in working with pygit2"""

				from mercurial.node import bin, sha1nodeconstants

				pygit2_module = None


				def get_pygit2():
				global pygit2_module
				if pygit2_module is None:
				try:
				import pygit2 as pygit2_module # pytype: disable=import-error

				pygit2_module.InvalidSpecError
				except (ImportError, AttributeError):
				pass
				return pygit2_module


				def pygit2_version():
				mod = get_pygit2()
				v = "N/A"

				if mod:
				try:
				v = mod.__version__
				except AttributeError:
				pass

				return b"(pygit2 %s)" % v.encode("utf-8")


				def togitnode(n):
				"""Wrapper to convert a Mercurial binary node to a unicode hexlified node.

				pygit2 and sqlite both need nodes as strings, not bytes.
				"""
				assert len(n) == 20
				return n.hex()


				def fromgitnode(n):
				"""Opposite of togitnode."""
				assert len(n) == 40
				return bin(n)


				nullgit = togitnode(sha1nodeconstants.nullid)