#!/bin/sh
# ----------------------------------------------------------------------------
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.
# ----------------------------------------------------------------------------

# ----------------------------------------------------------------------------
# Maven2 Start Up Batch script
#
# Required ENV vars:
# ------------------
#   JAVA_HOME - location of a JDK home dir
#
# Optional ENV vars
# -----------------
#   M2_HOME - location of maven2's installed home dir
#   MAVEN_OPTS - parameters passed to the Java VM when running Maven
#     e.g. to debug Maven itself, use
#       set MAVEN_OPTS=-Xdebug -Xnoagent -Djava.compiler=NONE -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
# ----------------------------------------------------------------------------

QUOTED_ARGS=""
while [ "$1" != "" ] ; do

  QUOTED_ARGS="$QUOTED_ARGS \"$1\""
  shift

done

if [ -f /etc/mavenrc ] ; then
  . /etc/mavenrc
fi

if [ -f "$HOME/.mavenrc" ] ; then
  . "$HOME/.mavenrc"
fi

# OS specific support.  $var _must_ be set to either true or false.
cygwin=false;
darwin=false;
mingw=false
case "`uname`" in
  CYGWIN*) cygwin=true ;;
  MINGW*) mingw=true;;
  Darwin*) darwin=true 
           if [ -z "$JAVA_VERSION" ] ; then
             JAVA_VERSION="CurrentJDK"
           else
             echo "Using Java version: $JAVA_VERSION"
           fi
           if [ -z "$JAVA_HOME" ] ; then
             JAVA_HOME=/System/Library/Frameworks/JavaVM.framework/Versions/${JAVA_VERSION}/Home
           fi
           ;;
esac

if [ -z "$M2_HOME" ] ; then
  M2_HOME="/usr/share/maven2"
fi

# Debian patch - search for preferred JRE

# Given the "java" executable as an argument, find JAVA_HOME
find_java() {
  # First check if it is a JDK in the /usr/lib/jvm directory, or a symlink there.
  # The test is somewhat complicated due to the different ways the Java implementations
  # are set up with the alternatives system
  # e.g.
  #  /usr/bin/java -> /etc/alternatives/java -> /usr/lib/jvm/java-1.5.0-sun/jre/bin/java
  # or
  #  /usr/bin/java -> /etc/alternatives/java -> /usr/lib/jvm/java-gcj/bin/java -> /usr/bin/gij-4.2

  JAVA_HOME=$1
  while true ; do
    case $JAVA_HOME in
      /usr/lib/jvm/*)
        # Found it! Return the correct paremt directory.

        JAVA_HOME=`echo $JAVA_HOME | sed 's:\(/usr/lib/jvm/[^/]*\).*:\1:'`
	return
	;;
      *) ;;
    esac

    if [ -h $JAVA_HOME ] ; then
      JAVA_HOME=`readlink $JAVA_HOME`
    else
      break
    fi
  done
        
  # Not found in the Debian alternatives system, so presumably
  # it is a user-installed JDK/JRE. Might as well be helpful
  # and try to find JAVA_HOME.

  # First try for a JDK:
  JAVA_HOME=`readlink -e $1`
  while [ `dirname $JAVA_HOME` != /  ]; do
    if [ -e $JAVA_HOME/lib/tools.jar ]; then
      return
    fi

    JAVA_HOME=`dirname $JAVA_HOME`
  done

  # If we get here we did not find a JDK. Search again for a JRE:
  JAVA_HOME=`readlink -e $1`
  while [ `dirname $JAVA_HOME` != /  ]; do
    if [ -e $JAVA_HOME/bin/java ]; then
      return
    fi

    JAVA_HOME=`dirname $JAVA_HOME`
  done

  # Nothing found; leave blank
  JAVA_HOME=
}

    
if [ -z "$JAVA_HOME" ] ; then
  if [ -r /etc/gentoo-release ] ; then
    JAVA_HOME=`java-config --jre-home`
  else
    # Debian patch - search for preferred JRE
    if [ -n "$JAVACMD" ] ; then
      find_java "$JAVACMD"
    else
      find_java `which java`
    fi
  fi
fi

if [ -z "$M2_HOME" ] ; then
  ## resolve links - $0 may be a link to maven'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

  saveddir=`pwd`

  M2_HOME=`dirname "$PRG"`/..

  # make it fully qualified
  M2_HOME=`cd "$M2_HOME" && pwd`

  cd "$saveddir"
  # echo Using m2 at $M2_HOME
fi

# For Cygwin, ensure paths are in UNIX format before anything is touched
if $cygwin ; then
  [ -n "$M2_HOME" ] &&
    M2_HOME=`cygpath --unix "$M2_HOME"`
  [ -n "$JAVA_HOME" ] &&
    JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
  [ -n "$CLASSPATH" ] &&
    CLASSPATH=`cygpath --path --unix "$CLASSPATH"`
fi

# For Migwn, ensure paths are in UNIX format before anything is touched
if $mingw ; then
  [ -n "$M2_HOME" ] &&
    M2_HOME="`(cd "$M2_HOME"; pwd)`"
  [ -n "$JAVA_HOME" ] &&
    JAVA_HOME="`(cd "$JAVA_HOME"; pwd)`"
  # TODO classpath?
fi

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="`which java`"
  fi
fi

if [ ! -x "$JAVACMD" ] ; then
  echo "Error: JAVA_HOME is not defined correctly."
  echo "  We cannot execute $JAVACMD"
  exit 1
fi

if [ -z "$JAVA_HOME" ] ; then
  echo "Warning: JAVA_HOME environment variable is not set."
fi

CLASSWORLDS_LAUNCHER=org.codehaus.classworlds.Launcher

# For Cygwin, switch paths to Windows format before running java
if $cygwin; then
  [ -n "$M2_HOME" ] &&
    M2_HOME=`cygpath --path --windows "$M2_HOME"`
  [ -n "$JAVA_HOME" ] &&
    JAVA_HOME=`cygpath --path --windows "$JAVA_HOME"`
  [ -n "$HOME" ] &&
    HOME=`cygpath --path --windows "$HOME"`
fi

exec "$JAVACMD" \
  $MAVEN_OPTS \
  -classpath "${M2_HOME}"/boot/classworlds.jar \
  "-Dclassworlds.conf=${M2_HOME}/bin/m2.conf" \
  "-Dmaven.home=${M2_HOME}"  \
  ${CLASSWORLDS_LAUNCHER} $QUOTED_ARGS