Groovy example source code file (startGroovy)

This example Groovy source code file (startGroovy) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Groovy tags/keywords

cp, cp, for, groovy_conf, groovy_home, groovy_home, java_home, java_home, javacmd, javacmd, max_fd, prg, profiler, tools_jar

The Groovy startGroovy source code

# -*- mode:sh -*-

##############################################################################
##                                                                          ##
##  Groovy JVM Bootstrap for UN*X                                           ##
##                                                                          ##
##############################################################################

##
## $Revision: 19978 $
## $Date: 2010-05-08 13:11:29 +0200 (Sa, 08. Mai 2010) $
##

PROGNAME=`basename "$0"`

#DIRNAME=`dirname "$0"`

SCRIPT_PATH="$0"

# Use the maximum available, or set MAX_FD != -1 to use that value.
MAX_FD="maximum"

warn ( ) {
    echo "${PROGNAME}: $*"
}

die ( ) {
    warn "$*"
    exit 1
}

earlyInit ( ) {
    return
}

lateInit ( ) {
    return
}

GROOVY_STARTUP="$HOME/.groovy/startup"
if [ -r "$GROOVY_STARTUP" ] ; then
    . "$GROOVY_STARTUP"
fi

earlyInit

# OS specific support (must be 'true' or 'false').
cygwin=false
msys=false
darwin=false
case "`uname`" in
  CYGWIN* )
    cygwin=true
    ;; 
  Darwin* )
    darwin=true
    ;;
  MINGW* )
    msys=true
    ;;
esac

if [ "$1" = "-cp" -o "$1" = "-classpath" -o "$1" = "--classpath" ] ; then
    CP=$2
    shift 2
fi

# Attempt to set JAVA_HOME if it's not already set.
if [ -z "$JAVA_HOME" ] ; then
    if $darwin ; then 
        [ -z "$JAVA_HOME" -a -d "/Library/Java/Home" ] && export JAVA_HOME="/Library/Java/Home"
        [ -z "$JAVA_HOME" -a -d "/System/Library/Frameworks/JavaVM.framework/Home" ] && export JAVA_HOME="/System/Library/Frameworks/JavaVM.framework/Home"
    else
        javaExecutable="`which javac`"
        [ -z "$javaExecutable" -o "`expr \"$javaExecutable\" : '\([^ ]*\)'`" = "no" ] && die "JAVA_HOME not set and cannot find javac to deduce location, please set JAVA_HOME."
        # readlink(1) is not available as standard on Solaris 10.
        readLink=`which readlink`
        [ `expr "$readLink" : '\([^ ]*\)'` = "no" ] && die "JAVA_HOME not set and readlink not available, please set JAVA_HOME."
        javaExecutable="`readlink -f \"$javaExecutable\"`"
        javaHome="`dirname \"$javaExecutable\"`"
        javaHome=`expr "$javaHome" : '\(.*\)/bin'`
        JAVA_HOME="$javaHome"
        export JAVA_HOME

    fi
fi

# For Cygwin, ensure paths are in UNIX format before anything is touched.
if $cygwin ; then
    [ -n "$GROOVY_HOME" ] && GROOVY_HOME=`cygpath --unix "$GROOVY_HOME"`
    [ -n "$JAVACMD" ] && JAVACMD=`cygpath --unix "$JAVACMD"`
    [ -n "$JAVA_HOME" ] && JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
    [ -n "$CP" ] && CP=`cygpath --path --unix "$CP"`
else
    if [ -n "$GROOVY_HOME" -a `expr "$GROOVY_HOME":'\/$'` ] ; then
        GROOVY_HOME=`echo $GROOVY_HOME | sed -e 's/\/$//'`
    fi
fi

#  For MSYS, ensure paths are in appropriate format.
if $msys
then
    [ -n "$JAVA_HOME" ] && JAVA_HOME=`( cd "$JAVA_HOME" ; pwd )`
fi

# Attempt to set GROOVY_HOME if it is not already set.
if [ -z "$GROOVY_HOME" -o ! -d "$GROOVY_HOME" ] ; then
    # Resolve links: $0 may be a link to groovy's home.
    PRG="$0"
    # Need this for relative symlinks.
    while [ -h "$PRG" ] ; do
        ls=`ls -ld "$PRG"`
        link=`expr "$ls" : '.*-> \(.*\)$'`
        if expr "$link" : '/.*' > /dev/null; then
            PRG="$link"
        else
            PRG=`dirname "$PRG"`"/$link"
        fi
    done
    SAVED="`pwd`"
    cd "`dirname \"$PRG\"`/.."
    GROOVY_HOME="`pwd -P`"
    cd "$SAVED"
fi

# Set the default Groovy config if no specific one is mentioned.
if [ -z "$GROOVY_CONF" ] ; then
    GROOVY_CONF="$GROOVY_HOME/conf/groovy-starter.conf"
fi
STARTER_CLASSPATH="$GROOVY_HOME/lib/@GROOVYJAR@"

# Create the final classpath. Setting a classpath using the -cp or -classpath option means not to use the
# global classpath. Groovy behaves then the same as the java interpreter
if [ -n "$CP" ] ; then
    CP="$CP":.
elif [ -n "$CLASSPATH" ] ; then
    CP="$CLASSPATH":.
else
    CP=.
fi

# Determine the Java command to use to start the JVM.
if [ -z "$JAVACMD" ] ; then
    if [ -n "$JAVA_HOME" ] ; then
        if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
            # IBM's JDK on AIX uses strange locations for the executables
            JAVACMD="$JAVA_HOME/jre/sh/java"
        else
            JAVACMD="$JAVA_HOME/bin/java"
        fi
    else
        JAVACMD="java"
    fi
fi
if [ ! -x "$JAVACMD" ] ; then
    die "JAVA_HOME is not defined correctly, can not execute: $JAVACMD"
fi
if [ -z "$JAVA_HOME" ] ; then
    warn "JAVA_HOME environment variable is not set"
fi

# Increase the maximum file descriptors if we can.
if [ "$cygwin" = "false" -a "$darwin" = "false" ] ; then
    MAX_FD_LIMIT=`ulimit -H -n`
    if [ $? -eq 0 ] ; then
        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
            MAX_FD="$MAX_FD_LIMIT"
        fi
        ulimit -n $MAX_FD
        if [ $? -ne 0 ] ; then
            warn "Could not set maximum file descriptor limit: $MAX_FD"
        fi
    else
        warn "Could not query businessSystem maximum file descriptor limit: $MAX_FD_LIMIT"
    fi
fi

# Setup Profiler
useprofiler=false
if [ "$PROFILER" != "" ] ; then
    if [ -r "$PROFILER" ] ; then
        . $PROFILER
        useprofiler=true
    else
        die "Profiler file not found: $PROFILER"
    fi
fi

# For Darwin, use classes.jar for TOOLS_JAR
TOOLS_JAR="$JAVA_HOME/lib/tools.jar"
#if $darwin; then
#    TOOLS_JAR="/System/Library/Frameworks/JavaVM.framework/Versions/CurrentJDK/Classes/classes.jar"
#fi

# For Darwin, add GROOVY_APP_NAME to the JAVA_OPTS as -Xdock:name
if $darwin; then
    JAVA_OPTS="$JAVA_OPTS -Xdock:name=$GROOVY_APP_NAME -Xdock:icon=$GROOVY_HOME/bin/groovy.icns"
fi

# For Cygwin, switch paths to Windows format before running java
if $cygwin ; then
    GROOVY_HOME=`cygpath --mixed "$GROOVY_HOME"`
    JAVA_HOME=`cygpath --mixed "$JAVA_HOME"`
    GROOVY_CONF=`cygpath --mixed "$GROOVY_CONF"`
    CP=`cygpath --path --mixed "$CP"`    
    TOOLS_JAR=`cygpath --mixed "$TOOLS_JAR"`
    STARTER_CLASSPATH=`cygpath --path --mixed "$STARTER_CLASSPATH"`

    # We build the pattern for arguments to be converted via cygpath
    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
    SEP=""
    for dir in $ROOTDIRSRAW ; do
        ROOTDIRS="$ROOTDIRS$SEP$dir"
        SEP="|"
    done
    OURCYGPATTERN="(^($ROOTDIRS))"
    # Add a user-defined pattern to the cygpath arguments
    if [ "$GROOVY_CYGPATTERN" != "" ] ; then
        OURCYGPATTERN="$OURCYGPATTERN|($GROOVY_CYGPATTERN)"
    fi
    # Now convert the arguments - kludge to limit ourselves to /bin/sh
    i=0
    for arg in "$@" ; do
        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
        if [ $CHECK -ne 0 ] ; then
            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
        else
            eval `echo args$i`="\"$arg\""
        fi
        i=`expr $i + 1`
    done
    case $i in
        0) set -- ;;
        1) set -- "$args0" ;;
        2) set -- "$args0" "$args1" ;;
        3) set -- "$args0" "$args1" "$args2" ;;
        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
    esac

fi

startGroovy ( ) {
    CLASS=$1
    shift
    # Start the Profiler or the JVM
    if $useprofiler ; then
        runProfiler
    else
        exec "$JAVACMD" $JAVA_OPTS \
            -classpath "$STARTER_CLASSPATH" \
            -Dscript.name="$SCRIPT_PATH" \
            -Dprogram.name="$PROGNAME" \
            -Dgroovy.starter.conf="$GROOVY_CONF" \
            -Dgroovy.home="$GROOVY_HOME" \
            -Dtools.jar="$TOOLS_JAR" \
            $STARTER_MAIN_CLASS \
            --main $CLASS \
            --conf "$GROOVY_CONF" \
            --classpath "$CP" \
            "$@"
    fi
}

STARTER_MAIN_CLASS=org.codehaus.groovy.tools.GroovyStarter

lateInit