#! /bin/sh
## For the time being, this is a simple shell script ...

## Find the R home directory.
: ${R_HOME=`R RHOME`}
if test -z "${R_HOME}"; then
  echo "Could not determine R_HOME."
  exit 1
fi

## Find the configured Java interpreter.
## Argh.  R CMD config JAVA works only from 2.5.0 onwards ...
JAVA=`"${R_HOME}/bin/R" CMD config | grep JAVA`
if test -n "${JAVA}"; then
  JAVA=`"${R_HOME}/bin/R" CMD config JAVA`
else
  ## Keep this in sync with what is used in R CMD javareconf.
  ## Sort of ...
  JAVA_PATH="${PATH}"
  if test -n "${JAVA_HOME}" && test -d "${JAVA_HOME}"; then
    JAVA_PATH="${JAVA_HOME}:${JAVA_HOME}/jre/bin:${JAVA_HOME}/bin:${JAVA_PATH}"
  fi
  JAVA_PATH="${JAVA_PATH}":/usr/java/bin:/usr/jdk/bin:/usr/lib/java/bin:/usr/lib/jdk/bin:/usr/local/java/bin:/usr/local/jdk/bin:/usr/local/lib/java/bin:/usr/local/lib/jdk/bin
  save_IFS="${IFS}"
  IFS=":"
  for dir in ${JAVA_PATH}; do
    test "${dir}" = "." && continue
    if test -x "${dir}/java"; then
      JAVA="${dir}/java"
      break
  fi
  done
  IFS="${save_IFS}"
fi
if test -z "${JAVA}"; then
  echo "Could not determine the Java interpreter."
  echo "Maybe run R CMD javareconf?"
  exit 1
fi

## Check whether Java is 1.5/5.0 as required by current
## versions of Jawbone.
wordnet_cv_java_version_5=no
## See See <http://openjdk.java.net/jeps/223>.
java_version=`${JAVA} -cp tools getsp "java.version" | sed 's/[+-].*//'`
java_version_maj=`echo "${java_version}" | cut -f1 -d.`
java_version_min=`echo "${java_version}" | cut -f2 -d.`
if test ${java_version_maj} -ge 5 || \
    test ${java_version_maj} -eq 1 -a ${java_version_min} -ge 5;
then
  wordnet_cv_java_version_5=yes
fi

if test "${wordnet_cv_java_version_5}" = no; then
  echo "wordnet needs at least Java version 1.5/5.0."
  exit 1
fi
