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

rebase: move actual rebase into a single transaction...

rebase: move actual rebase into a single transaction Previously, rebasing would open several transaction over the course of rebasing several commits. Opening a transaction can have notable overhead (like copying the dirstate) which can add up when rebasing many commits. This patch adds a single large transaction around the actual commit rebase operation, with a catch for intervention which serializes the current state if we need to drop back to the terminal for user intervention. Amazingly, almost all the tests seem to pass. On large repos with large working copies, this can speed up rebasing 7 commits by 25%. I'd expect the percentage to be a bit larger for rebasing even more commits. There are minor test changes because we're rolling back the entire transaction during unexpected exceptions instead of just stopping mid-rebase, so there's no more backup bundle. It also leave an unknown file in the working copy, since our clean up 'hg update' doesn't delete unknown files.

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()