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#!/bin/sh

# resolve links - $0 may be a softlink
PRG="$0"
while [ -h "$PRG" ]; do
    ls="$(ls -ld "$PRG")"
    link="${ls##*-> }" # remove largest prefix: yields link target (behind ->)
    if [ "$link" != "${link#/}" ]; then # remove prefix / if present
        # path was absolute
        PRG="$link"
    else
        # was not
        PRG="$(dirname "$PRG")/$link"
    fi
done

DIR="$(dirname "$PRG")"

# Check if we should use a distribution bootstrap
if [ -f "$DIR/.ceylon/bootstrap/ceylon-bootstrap.properties" ] && [ -f "$DIR/.ceylon/bootstrap/ceylon-bootstrap.jar" ]; then
    # Using bootstrap
    LIB="$DIR/.ceylon/bootstrap"
else
    # Normal execution
    CEYLON_HOME="$DIR/.."
    LIB="$CEYLON_HOME/lib"

    if [ "$1" = "--show-home" ]; then
        echo "$CEYLON_HOME"
        exit
    fi
fi

if [ -z "$JAVA_HOME" ]; then
    JAVA="java"
else
    JAVA="$JAVA_HOME/bin/java"
fi

# Make sure we have java installed
if ! hash java 2>&-
then
    echo >&2 "Java not found, you must install Java in order to compile and run Ceylon programs"
    echo >&2 "Go to http://www.java.com/getjava/ to download the latest version of Java"
    exit 1
fi

#JAVA_DEBUG_OPTS="-Xrunjdwp:transport=dt_socket,address=8787,server=y,suspend=y"

if [ "$PRESERVE_JAVA_OPTS" != "true" ]; then
    PREPEND_JAVA_OPTS="$JAVA_DEBUG_OPTS"
    if [ -n "$COLUMNS" ]; then
        CEYL_COLS="$COLUMNS"
    elif stty size 2>/dev/null >/dev/null; then
        CEYL_COLS="$(stty size 2>/dev/null | cut -d' ' -f2)"
    else
        CEYL_COLS="$(tput 2>/dev/null cols)"
    fi
    PREPEND_JAVA_OPTS="$PREPEND_JAVA_OPTS -Dcom.redhat.ceylon.common.tool.terminal.width=$CEYL_COLS"
    PREPEND_JAVA_OPTS="$PREPEND_JAVA_OPTS -Dcom.redhat.ceylon.common.tool.progname=$(basename "$PRG")"
fi
for arg; do
    case $arg in
        --java=*) JAVA_OPTS="$JAVA_OPTS ${arg#--java=}";;
        [!-]*) break;;
    esac
done
JAVA_OPTS="$PREPEND_JAVA_OPTS $JAVA_OPTS"

BOOTSTRAP="$LIB/ceylon-bootstrap.jar"

# Check for cygwin, convert bootstrap path to Windows format
case "`uname`" in
  CYGWIN*) [ -n "$LIB" ] && BOOTSTRAP=`cygpath -w "$BOOTSTRAP"`
esac

exec "$JAVA" \
    $JAVA_OPTS \
    -jar "$BOOTSTRAP" \
    "$@"