bin/pig

#!/usr/bin/env bash

debug="false"

# resolve links - $0 may be a softlink
this="${BASH_SOURCE-$0}"
while [ -h "$this" ]; do
    ls=`ls -ld "$this"`
    link=`expr "$ls" : '.*-> \(.*\)$'`
    if expr "$link" : '.*/.*' > /dev/null; then
        this="$link"
    else
        this=`dirname "$this"`/"$link"
    fi
done

# convert relative path to absolute path
bin=`dirname "$this"`
script=`basename "$this"`
bin=`unset CDPATH; cd "$bin"; pwd`
this="$bin/$script"

# the root of the Pig installation
export PIG_HOME=`dirname "$this"`/..
export PIG_CONF_DIR="$PIG_HOME/conf"

if [ -f "${PIG_CONF_DIR}/pig-env.sh" ]; then
    . "${PIG_CONF_DIR}/pig-env.sh"
fi

if [ "$JAVA_HOME" = "" ]; then
    echo "Error: JAVA_HOME is not set."
    exit 1
fi

JAVA=$JAVA_HOME/bin/java
# check envvars which might override default args
if [ "$PIG_HEAPSIZE" != "" ]; then
    JAVA_HEAP_MAX="-Xmx""$PIG_HEAPSIZE""m"
else
    JAVA_HEAP_MAX=-Xmx1000m
fi

# CLASSPATH initially contains $PIG_CONF_DIR
CLASSPATH="${PIG_CONF_DIR}"
CLASSPATH=${CLASSPATH}:$JAVA_HOME/lib/tools.jar

if [ "$PIG_CLASSPATH" != "" ]; then
    CLASSPATH=${CLASSPATH}:${PIG_CLASSPATH}
fi

# default log directory & file
if [ "$PIG_LOG_DIR" = "" ]; then
    PIG_LOG_DIR="$PIG_HOME/logs"
fi
if [ "$PIG_LOGFILE" = "" ]; then
    PIG_LOGFILE='pig.log'
fi

CLASS=org.apache.pig.Main

PIG_OPTS="$PIG_OPTS -Dpig.log.dir=$PIG_LOG_DIR"
PIG_OPTS="$PIG_OPTS -Dpig.log.file=$PIG_LOGFILE"
PIG_OPTS="$PIG_OPTS -Dpig.home.dir=$PIG_HOME"
PIG_OPTS="$PIG_OPTS -Dpig.root.logger=${PIG_ROOT_LOGGER:-INFO,console,DRFA}"

# run it
if [ "$debug" == "true" ]; then
    echo "dry run:"
    echo "$JAVA" $JAVA_HEAP_MAX $PIG_OPTS -classpath "$CLASSPATH" $CLASS ${remaining}
    echo
else
    exec "$JAVA" $JAVA_HEAP_MAX $PIG_OPTS -classpath "$CLASSPATH" $CLASS ${remaining}
fi