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#!/bin/sh

if [ -z "$JERKAR_OPTS" ] ; then
  export "JERKAR_OPTS= "
fi

if [ -n "$JERKAR_JDK" ] ; then
  export JAVA_HOME=$JERKAR_JDK
fi

# OS specific support.  $var _must_ be set to either true or false.
cygwin=false;
darwin=false;
mingw=false
case "`uname`" in
  CYGWIN*) cygwin=true ;;
  MINGW*) mingw=true;;
  Darwin*) darwin=true
           #
           # Look for the Apple JDKs first to preserve the existing behaviour, and then look
           # for the new JDKs provided by Oracle.
           # 
           if [ -z "$JAVA_HOME" ] && [ -L /System/Library/Frameworks/JavaVM.framework/Versions/CurrentJDK ] ; then
             #
             # Apple JDKs
             #
             export JAVA_HOME=/System/Library/Frameworks/JavaVM.framework/Versions/CurrentJDK/Home
           fi
           
           if [ -z "$JAVA_HOME" ] && [ -L /System/Library/Java/JavaVirtualMachines/CurrentJDK ] ; then
             #
             # Apple JDKs
             #
             export JAVA_HOME=/System/Library/Java/JavaVirtualMachines/CurrentJDK/Contents/Home
           fi
             
           if [ -z "$JAVA_HOME" ] && [ -L "/Library/Java/JavaVirtualMachines/CurrentJDK" ] ; then
             #
             # Oracle JDKs
             #
             export JAVA_HOME=/Library/Java/JavaVirtualMachines/CurrentJDK/Contents/Home
           fi           

           if [ -z "$JAVA_HOME" ] && [ -L "/usr/libexec/java_home" ]; then
             #
             # Apple JDKs
             #
             export JAVA_HOME=`/usr/libexec/java_home`
           fi
           ;;
esac

if [ -z "$JAVA_HOME" ] ; then
  if [ -r /etc/gentoo-release ] ; then
    JAVA_HOME=`java-config --jre-home`
  fi
fi

if [ -z "$JERKAR_HOME" ] ; then
  ## resolve links - $0 may be a link to jerkar'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`

  JERKAR_HOME=`dirname "$PRG"`

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

  cd "$saveddir"
fi

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

if [ -z "$JAVA_HOME" ]; then
  javaExecutable="`which javac`"
  if [ -n "$javaExecutable" ] && ! [ "`expr \"$javaExecutable\" : '\([^ ]*\)'`" = "no" ]; then
    # readlink(1) is not available as standard on Solaris 10.
    readLink=`which readlink`
    if [ ! `expr "$readLink" : '\([^ ]*\)'` = "no" ]; then
      javaExecutable="`readlink -f \"$javaExecutable\"`"
      javaHome="`dirname \"$javaExecutable\"`"
      javaHome=`expr "$javaHome" : '\(.*\)/bin'`
      JAVA_HOME="$javaHome"
      export JAVA_HOME
    fi
  fi
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 (valued to $JAVA_HOME )." >&2
  echo "  We cannot execute $JAVACMD" >&2
  echo "  You can specify which JDK to use by setting JERKAR_JDK environment variable." >&2
  exit 1
fi

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

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

# Provide a "standardized" way to retrieve the CLI args that will 
# work with both Windows and non-Windows executions.
JERKAR_CMD_LINE_ARGS="$@"
export JERKAR_CMD_LINE_ARGS

if [ -d "./jerkar/boot" ]; then
   LOCAL_BUILD_DIR="./jerkar/boot/*:"
else
   LOCAL_BUILD_DIR=""
fi

exec "$JAVACMD" \
  $JERKAR_OPTS \
  -cp "$JERKAR_HOME/org.jerkar.core.jar" org.jerkar.tool.Main "$@"