proce55ing with pipeline

example.sh

./p5-pipe.sh pipe_invert pipe_blur --args ./sample.png

p5-pipe.sh

#!/bin/sh

# parse arguments

sketches=()

while [ "$1" != "" -a "$1" != "--args" ]
do
	sketches+=( "$1" )
	shift
done

shift
args="$@"

# execute sketches in order

for sketch in ${sketches[@]}; do
	
	absPath=`cd "$sketch"; pwd`
	echo start: ${absPath} >&2
	args=`processing-java --sketch=$absPath --run ${args[@]} | sed -e '1d' | sed -e '$d' | tail -1`
	echo \> $args >&2

done

echo "all done."

pipe_blur.pde

ArrayList<String> arguments;

void setup() {
    
    arguments = getArgs();
    
    if ( arguments.size() == 0 ) {
        exit();
    }
    
    String src = arguments.get(0);
    String name = getFileName( src );
    String dir = getDirectory( src );
    String dst = dir + "/" + name + "_blurred.png";
    
    PImage img = loadImage( src );
    img.filter( BLUR, 6 );
    img.save( dst );
    
    println( dst );
    exit();
}

pipe_invert.pde

ArrayList<String> arguments;


void setup() {
    
    arguments = getArgs();
    
    if ( arguments.size() == 0 ) {
        exit();
    }
    
    String src = arguments.get(0);
    String name = getFileName( src );
    String dir = getDirectory( src );
    String dst = dir + "/" + name + "_inverted.png";
    
    PImage img = loadImage( src );
    img.filter( INVERT );
    img.save( dst );
    
    println( dst );
    exit();
}

util.pde

ArrayList< String > getArgs() {
    
    ArrayList< String > arguments = new ArrayList< String >();
    
    try {
        for ( int i = 0; i < args.length; i++ ) {
            arguments.add( args[i] );
        }
    } catch ( Exception e ) {
        return arguments;
    }
    
    return arguments;
}

String getFileName( String path ) {
    
    String filename = new File( path ).getName();
    int point = filename.lastIndexOf(".");
    
    if (point != -1) {
        return filename.substring(0, point);
    } 
    
    return filename;
}

String getDirectory( String path ) {
    
    return new File( path ).getParent();
}