upstream/mercurial-mirror Files · contrib/tcsh_completion_build.sh

wireprotov2peer: stream decoded responses...

wireprotov2peer: stream decoded responses Previously, wire protocol version 2 would buffer all response data. Only once all data was received did we CBOR decode it and resolve the future associated with the command. This was obviously not desirable. In future commits that introduce large response payloads, this caused significant memory bloat and slowed down client operations due to waiting on the server. This commit refactors the response handling code so that response data can be streamed. Command response objects now contain a buffered CBOR decoder. As new data arrives, it is fed into the decoder. Decoded objects are made available to the generator as they are decoded. Because there is a separate thread processing incoming frames and feeding data into the response object, there is the potential for race conditions when mutating response objects. So a lock has been added to guard access to critical state variables. Because the generator emitting decoded objects needs to wait on those objects to become available, we've added an Event for the generator to wait on so it doesn't busy loop. This does mean there is the potential for deadlocks. And I'm pretty sure they can occur in some scenarios. We already have a handful of TODOs around this. But I've added some more. Fixing this will likely require moving the background thread receiving frames into clienthandler. We likely would have done this anyway when implementing the client bits for the SSH transport. Test output changes because the initial CBOR map holding the overall response state is now always handled internally by the response object. Differential Revision: https://phab.mercurial-scm.org/D4474

Gilles Moris - - Load All Authors

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r13515:26163257 1.8 stable


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      #!/bin/sh

      #

      # tcsh_completion_build.sh - script to generate tcsh completion

      #

      #

      # Copyright (C) 2005 TK Soh.

      #

      # This is free software; you can redistribute it and/or modify it under

      # the terms of the GNU General Public License as published by the Free

      # Software Foundation; either version 2 of the License, or (at your

      # option) any later version.

      #

      #

      # Description

      # -----------

      # This script generates a tcsh source file to support completion

      # of Mercurial commands and options.

      #

      # Instruction:

      # -----------

      # Run this script to generate the tcsh source file, and source

      # the file to add command completion support for Mercurial.

      #

      #    tcsh% tcsh_completion.sh FILE

      #    tcsh% source FILE

      #

      # If FILE is not specified, tcsh_completion will be generated.

      #

      # Bugs:

      # ----

      # 1. command specific options are not supported

      # 2. hg commands must be specified immediately after 'hg'.

      #

      tcsh_file=${1-tcsh_completion}

      hg_commands=`hg --debug help | \

              sed -e '1,/^list of commands:/d' \

                  -e '/^enabled extensions:/,$d' \

                  -e '/^additional help topics:/,$d' \

                  -e '/^ [^ ]/!d; s/[,:]//g;' | \

              xargs -n5 | \

              sed -e '$!s/$/ \\\\/g; 2,$s/^ */    /g'`

      hg_global_options=`hg -v help | \

              sed -e '1,/global/d;/^ *-/!d; s/ [^- ].*//' | \

              sed -e 's/ *$//; $!s/$/ \\\\/g; 2,$s/^ */    /g'`

      hg_version=`hg version | sed -e '1q'`

      script_name=`basename $0`

      cat > $tcsh_file <<END

      #

      # tcsh completion for Mercurial

      #

      # This file has been auto-generated by $script_name for

      # $hg_version

      #

      # Copyright (C) 2005 TK Soh.

      #

      # This is free software; you can redistribute it and/or modify it under

      # the terms of the GNU General Public License as published by the Free

      # Software Foundation; either version 2 of the License, or (at your

      # option) any later version.

      #

      complete hg \\

        'n/--cwd/d/' 'n/-R/d/' 'n/--repository/d/' \\

        'C/-/($hg_global_options)/' \\

        'p/1/($hg_commands)/'

      END

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				#!/bin/sh

				#
				# tcsh_completion_build.sh - script to generate tcsh completion
				#
				#
				# Copyright (C) 2005 TK Soh.
				#
				# This is free software; you can redistribute it and/or modify it under
				# the terms of the GNU General Public License as published by the Free
				# Software Foundation; either version 2 of the License, or (at your
				# option) any later version.
				#
				#
				# Description
				# -----------
				# This script generates a tcsh source file to support completion
				# of Mercurial commands and options.
				#
				# Instruction:
				# -----------
				# Run this script to generate the tcsh source file, and source
				# the file to add command completion support for Mercurial.
				#
				# tcsh% tcsh_completion.sh FILE
				# tcsh% source FILE
				#
				# If FILE is not specified, tcsh_completion will be generated.
				#
				# Bugs:
				# ----
				# 1. command specific options are not supported
				# 2. hg commands must be specified immediately after 'hg'.
				#

				tcsh_file=${1-tcsh_completion}

				hg_commands=`hg --debug help \| \
				sed -e '1,/^list of commands:/d' \
				-e '/^enabled extensions:/,$d' \
				-e '/^additional help topics:/,$d' \
				-e '/^ [^ ]/!d; s/[,:]//g;' \| \
				xargs -n5 \| \
				sed -e '$!s/$/ \\\\/g; 2,$s/^ */ /g'`

				hg_global_options=`hg -v help \| \
				sed -e '1,/global/d;/^ -/!d; s/ [^- ].//' \| \
				sed -e 's/ $//; $!s/$/ \\\\/g; 2,$s/^ / /g'`

				hg_version=`hg version \| sed -e '1q'`

				script_name=`basename $0`

				cat > $tcsh_file <<END
				#
				# tcsh completion for Mercurial
				#
				# This file has been auto-generated by $script_name for
				# $hg_version
				#
				# Copyright (C) 2005 TK Soh.
				#
				# This is free software; you can redistribute it and/or modify it under
				# the terms of the GNU General Public License as published by the Free
				# Software Foundation; either version 2 of the License, or (at your
				# option) any later version.
				#

				complete hg \\
				'n/--cwd/d/' 'n/-R/d/' 'n/--repository/d/' \\
				'C/-/($hg_global_options)/' \\
				'p/1/($hg_commands)/'

				END