#!/bin/bash
#
# Copy a booke to cello-friendly form. Bass clef, transposed down
# 1 or 2 octaves.
#
# It would be easier to do with transpose in dottes.fmt, but I can't get
# that to work properly for a 2 octave downward transpose.
#
# This relies on abcm2ps >= 6.0 but does not check for it.

if [ $# != 1 ]; then
    echo "Usage: makeCello.sh <book dir name>"
    exit 1
fi

# Transpose down (return 0) if bottom note was < C.
transposedowntwo()
{
    return $(($3 >= 100))
}

dir=`pwd`

booke=$dir/$1
outdir=$dir/$1-Cello

mkdir -p $outdir

# Copy book component items.
cp $booke/*.txt $outdir

echo "Cello" > $outdir/instrument.txt

find $booke -name "*.abc" | sort |
    while read filename
    do
        name=`basename $filename .abc`
        range=`./abcrange.py $filename`

        # Move down either one octave or two, depending on the range
        # of the tune. If there are any notes below middle C, transpose
        # down one octave. The default is to transpose down two octaves.
        middle="d"
        if transposedowntwo $range; then
            middle="D"
        fi

        sed -e "/^ *K:/s/$/ clef=bass middle=$middle/" $filename > $outdir/$name.abc
    done