#! /bin/bash
#
# Process msg files with an old (trusty) and a new (development/testing) version 
# of the message compiler, and report the differences.
#

NEW_MSGC=nedtool
OLD_MSGC=~/omnetpp-5.0/bin/nedtool

INET_SRC=../../../inet/src
SAMPLES=../../samples
SRC=../../src

find $SRC $SAMPLES $INET_SRC -name '*.msg' > list.tmp

rm -rf old new results *_m.*
mkdir old new results

run_msgc() {
    msgc=$1
    msgfile=$2
    err=$3
    opts=
    # hack: sim_std.msg needs special options
    if echo $msgfile | grep -q sim_std; then
        opts="-Xnc -Xns"
    fi
    
    echo "RUNNING $msgc -h $msgfile" > $err
    if $msgc $opts -h $msgfile 2>>$err; then
        rm $err
    else
        echo "ERRORS from $msgc"
        false
    fi
}

for msgfile in $(cat list.tmp); do
    echo -n "$msgfile... "

    msgfname=$(echo $msgfile | sed 's|.*/||')
    hfile=${msgfname//.msg/_m.h}
    ccfile=${msgfname//.msg/_m.cc}
    
    run_msgc $OLD_MSGC $msgfile results/$msgfname.err || continue
    mv $hfile $ccfile old/

    run_msgc $NEW_MSGC $msgfile results/$msgfname.err || continue
    mv $hfile $ccfile new/
    
    hdiff=results/$hfile.diff
    ccdiff=results/$ccfile.diff
    
    diff -u old/$hfile new/$hfile > $hdiff && rm $hdiff
    diff -u old/$ccfile new/$ccfile > $ccdiff && rm $ccdiff
    if [ -f $hdiff -o -f $ccdiff ]; then
        echo DIFF
    else
        echo OK
    fi
done