How can I use Beyond Compare 3 as the diff3-cmd for svn?

Question

I saw this posting which explained how to get BC3 working as the diff tool for Subversion... but what about using Beyond Compare 3 to do 3-way merge/compares?

Answer 1

Here's a Cygwin bash script that works with Subversion 1.7 for both diff-cmd and diff3-cmd

#!/bin/bash
# Set path to BeyondCompare
bcomp=~/bin/bcomp;

function bcerrlvl () {
    echo -en "$1\t";

    case $1 in
          0) echo "Success";;
          1) echo "Binary same";;
          2) echo "Rules-based same";;
         11) echo "Binary differences";;
         12) echo "Similar";;
         13) echo "Rules-based differences";;
         14) echo "Conflicts detected";;
        100) echo "Error";;
        101) echo "Conflicts detected, merge output not saved";;
          *) echo "Error";;
    esac;

    return $1;
}

if [ "$1" = "-u" ];
then
    # paths
    left=$(cygpath --dos "$6");
    right=$(cygpath --dos "$7");

    # titles
    titleleft="$3";
    titleright="$5";

    # compare command
    $bcomp -title1="$titleleft" -title2="$titleright" "$left" "$right";

    if [ $? -gt 0 ];
    then
        bcerrlvl $?;
        exit $?;
    else
        exit 0;
    fi;
elif [ "$1" = "-E" ];
then
    # Get to the tenth and eleventh arguments
    shift; shift;

    # paths
    centre=$(cygpath --dos "$7");
    left=$(cygpath --dos "$8");
    right=$(cygpath --dos "$9");
    outext="_$(date +%s)-$RANDOM.merge";
    output="$(cygpath --dos "$8")_$outext";

    # titles
    titlecentre=$2;
    titleleft=$4;
    titleright=$6;
    titleoutput="Merge Output";

    # compare command
    $bcomp -title1="$titleleft" -title2="$titleright" -title3="$titlecentre" \
        -outputtitle="$titleoutput" -automerge -reviewconflicts \
        "$left" "$right" "$centre" "$output";

    if [ $? -eq 0 ];
    then
        outfile=$(cygpath --unix "$output");
        cat $outfile
        rm -f $outfile
        exit 0;
    else
        bcerrlvl $?;
        exit $?;
    fi;
fi;