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

worker: Use buffered input from the pickle stream...

worker: Use buffered input from the pickle stream On Python 3, "pickle.load" will raise an exception ("_pickle.UnpicklingError: pickle data was truncated") when it gets a short read, i.e. it receives fewer bytes than it requested. On our build machine, Mercurial seems to frequently hit this problem while updating a mozilla-central clone iff it gets scheduled in batch mode. It is easy to trigger with: #wipe the workdir rm -rf * hg update null chrt -b 0 hg update default I've also written the following program, which demonstrates the core problem: from __future__ import print_function import io import os import pickle import time obj = {"a": 1, "b": 2} obj_data = pickle.dumps(obj) assert len(obj_data) > 10 rfd, wfd = os.pipe() pid = os.fork() if pid == 0: os.close(rfd) for _ in range(4): time.sleep(0.5) print("First write") os.write(wfd, obj_data[:10]) time.sleep(0.5) print("Second write") os.write(wfd, obj_data[10:]) os._exit(0) try: os.close(wfd) rfile = os.fdopen(rfd, "rb", 0) print("Reading") while True: try: obj_copy = pickle.load(rfile) assert obj == obj_copy except EOFError: break print("Success") finally: os.kill(pid, 15) The program reliably fails with Python 3.8 and succeeds with Python 2.7. Providing the unpickler with a buffered reader fixes the issue, so let "os.fdopen" create one. https://bugzilla.mozilla.org/show_bug.cgi?id=1604486 Differential Revision: https://phab.mercurial-scm.org/D8051

Gilles Moris - - Load All Authors

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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