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manifest: move manifestctx creation into manifestlog.get()...

manifest: move manifestctx creation into manifestlog.get() Most manifestctx creation already happened in manifestlog.get(), but there was one spot in the manifestctx class itself that created an instance manually. This patch makes that one instance go through the manifestlog. This means extensions can just wrap manifestlog.get() and it will cover all manifestctx creations. It also means this code path now hits the manifestlog cache.

Gregory Szorc - - Load All Authors

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             test_cffi.py
        
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        Gregory Szorc
    
zstd: vendor python-zstandard 0.5.0...

              r30435
            
      import io

      try:

          import unittest2 as unittest

      except ImportError:

          import unittest

      import zstd

      try:

          import zstd_cffi

      except ImportError:

          raise unittest.SkipTest('cffi version of zstd not available')

      class TestCFFIWriteToToCDecompressor(unittest.TestCase):

          def test_simple(self):

              orig = io.BytesIO()

              orig.write(b'foo')

              orig.write(b'bar')

              orig.write(b'foobar' * 16384)

              dest = io.BytesIO()

              cctx = zstd_cffi.ZstdCompressor()

              with cctx.write_to(dest) as compressor:

                  compressor.write(orig.getvalue())

              uncompressed = io.BytesIO()

              dctx = zstd.ZstdDecompressor()

              with dctx.write_to(uncompressed) as decompressor:

                  decompressor.write(dest.getvalue())

              self.assertEqual(uncompressed.getvalue(), orig.getvalue())

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Gregory Szorc zstd: vendor python-zstandard 0.5.0...	r30435	import io

		try:
		import unittest2 as unittest
		except ImportError:
		import unittest

		import zstd

		try:
		import zstd_cffi
		except ImportError:
		raise unittest.SkipTest('cffi version of zstd not available')


		class TestCFFIWriteToToCDecompressor(unittest.TestCase):
		def test_simple(self):
		orig = io.BytesIO()
		orig.write(b'foo')
		orig.write(b'bar')
		orig.write(b'foobar' * 16384)

		dest = io.BytesIO()
		cctx = zstd_cffi.ZstdCompressor()
		with cctx.write_to(dest) as compressor:
		compressor.write(orig.getvalue())

		uncompressed = io.BytesIO()
		dctx = zstd.ZstdDecompressor()
		with dctx.write_to(uncompressed) as decompressor:
		decompressor.write(dest.getvalue())

		self.assertEqual(uncompressed.getvalue(), orig.getvalue())