upstream/mercurial-mirror Files · contrib/debugcmdserver.py

rust: module policy with importrust...

rust: module policy with importrust We introduce two rust+c module policies and a new `policy.importrust()` that makes use of them. This simple approach provides runtime switching of implementations, which is crucial for the performance measurements such as those Octobus does with ASV. It can also be useful for bug analysis. It also has the advantage of making conditionals in Rust callers more uniform, in particular abstracting over specifics like `demandimport` At this point, the build stays unchanged, with the rust-cpython based `rustext` module being built if HGWITHRUSTEXT=cpython. More transparency for the callers, i.e., just using `policy.importmod` would be a much longer term and riskier effort for the following reasons: 1. It would require to define common module boundaries for the three or four cases (pure, c, rust+ext, cffi) and that is premature with the Rust extension currently under heavy development in areas that are outside the scope of the C extensions. 2. It would imply internal API changes that are not currently wished, as the case of ancestors demonstrates. 3. The lack of data or property-like attributes (tp_member and tp_getset) in current `rust-cpython` makes it impossible to achieve direct transparent replacement of pure Python classes by Rust extension code, meaning that the caller sometimes has to be able to make adjustments or provide additional wrapping.

Pulkit Goyal - - Load All Authors

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             debugcmdserver.py
        
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      #!/usr/bin/env python

      #

      # Dumps output generated by Mercurial's command server in a formatted style to a

      # given file or stderr if '-' is specified. Output is also written in its raw

      # format to stdout.

      #

      # $ ./hg serve --cmds pipe | ./contrib/debugcmdserver.py -

      # o, 52   -> 'capabilities: getencoding runcommand\nencoding: UTF-8'

      from __future__ import absolute_import, print_function

      import struct

      import sys

      if len(sys.argv) != 2:

          print('usage: debugcmdserver.py FILE')

          sys.exit(1)

      outputfmt = '>cI'

      outputfmtsize = struct.calcsize(outputfmt)

      if sys.argv[1] == '-':

          log = sys.stderr

      else:

          log = open(sys.argv[1], 'a')

      def read(size):

          data = sys.stdin.read(size)

          if not data:

              raise EOFError

          sys.stdout.write(data)

          sys.stdout.flush()

          return data

      try:

          while True:

              header = read(outputfmtsize)

              channel, length = struct.unpack(outputfmt, header)

              log.write('%s, %-4d' % (channel, length))

              if channel in 'IL':

                  log.write(' -> waiting for input\n')

              else:

                  data = read(length)

                  log.write(' -> %r\n' % data)

              log.flush()

      except EOFError:

          pass

      finally:

          if log != sys.stderr:

              log.close()

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				#!/usr/bin/env python
				#
				# Dumps output generated by Mercurial's command server in a formatted style to a
				# given file or stderr if '-' is specified. Output is also written in its raw
				# format to stdout.
				#
				# $ ./hg serve --cmds pipe \| ./contrib/debugcmdserver.py -
				# o, 52 -> 'capabilities: getencoding runcommand\nencoding: UTF-8'

				from __future__ import absolute_import, print_function
				import struct
				import sys

				if len(sys.argv) != 2:
				print('usage: debugcmdserver.py FILE')
				sys.exit(1)

				outputfmt = '>cI'
				outputfmtsize = struct.calcsize(outputfmt)

				if sys.argv[1] == '-':
				log = sys.stderr
				else:
				log = open(sys.argv[1], 'a')

				def read(size):
				data = sys.stdin.read(size)
				if not data:
				raise EOFError
				sys.stdout.write(data)
				sys.stdout.flush()
				return data

				try:
				while True:
				header = read(outputfmtsize)
				channel, length = struct.unpack(outputfmt, header)
				log.write('%s, %-4d' % (channel, length))
				if channel in 'IL':
				log.write(' -> waiting for input\n')
				else:
				data = read(length)
				log.write(' -> %r\n' % data)
				log.flush()
				except EOFError:
				pass
				finally:
				if log != sys.stderr:
				log.close()