#!/bin/sh

# svn wrapper to avoid "svn: Write error: Broken pipe" error messages
# when piping the svn output to some command.
#
# Note: the svnwrapper:term trick prevents this script from freezing
# if svn starts a background process via $SVN_SSH (e.g. ssh -fMN ...
# for connection sharing) that still has its stderr connected to the
# pipe after svn terminates. It also allows the script to propagate
# the exit status of svn when there is no broken pipe.
#
# Script written by Vincent Lefevre <vincent@vinc17.net> in July 2010,
# released in the public domain.

filter()
{
  unset brpipe status
  IFS=""
  while read err
  do
    case "$err" in
      svnwrapper:term:*)
        status=${err#svnwrapper:term:}
        break ;;
      *Broken\ pipe) brpipe=1 ;;
      *) printf "%s\n" "$err" ;;
    esac
  done
  test -z "$brpipe" || kill -PIPE $$
  exit $status
}

{
  { svn "$@" 2>&1 >&3 3>&-; echo "svnwrapper:term:$?"; } | filter >&2 3>&-
} 3>&1

# $Id: svnwrapper.sh 38471 2010-08-06 11:37:20Z vinc17/ypig $