#!/bin/bash
#
#  Execution:  % findbugs-algs4 HelloWorld.class
#  Execution:  % findbugs-algs4 *.class
#
#  To see descriptions of bugs:  http://findbugs.sourceforge.net/bugDescriptions.html

INSTALL=/usr/local/algs4
JAVA=java
AUX_CLASSPATH=${INSTALL}/algs4.jar

# find the latest version of Findbugs
FINDBUGS=findbugs-[0-9].[0-9].[0-9]
FINDBUGS_JAR=$(ls -td ${INSTALL}/${FINDBUGS}/lib/findbugs.jar | head -1)
FINDBUGS_XML=${INSTALL}/findbugs.xml

# If there are no arguments
if [ ! -n "$1" ]; then
    echo 'Specify .class or .jar files as arguments.'
    echo "Usage: 'findbugs Test.class'"
    exit
fi

# If the first argument is either a .class or .java file that exists, runs findbugs
if [ "${1##*.}" = "class" ] || [ "${1##*.}" = "jar" ]; then
    if [ -e "$1" ]; then
        echo "Running findbugs on $*:"
        $JAVA -Duser.language=novice -jar "${FINDBUGS_JAR}" -textui -low -auxclasspath $AUX_CLASSPATH -longBugCodes -exclude "${FINDBUGS_XML}" $*
    else
        echo "File not found! Make sure you are specifying the path correctly."
        echo "The filename is case sensitive."
    fi
    exit
fi

echo "Findbugs needs .class or .jar files as arguments!"
echo "The filename is case sensitive."

exit