#!/bin/bash

# This script attempts to find and run trang. Any arguments given
# to it are passed "as is" to trang.
#
# Usage: runtrang <arg>...

# if trang is found in CLASSPATH, then call trang "manually"
if [[ $CLASSPATH == *trang* ]]; then
  TRANG="java com.thaiopensource.relaxng.translate.Driver";
else
  # otherwise, try to find trang.jar using the "locate" command
  if [ "$(locate trang.jar)" ]; then
    for jar in `locate trang.jar`; do
      TRANG="java -jar $jar";
      break;
    done
  else
    # otherwise, look in a few likely places
    if \
      [ -f  "/usr/share/java/trang.jar" ] || \
      [ -f "/usr/local/java/trang.jar" ] || \
      [ -f "/usr/local/share/java/trang.jar" ]; then
      for jar in \
        "/usr/share/java/trang.jar" \
        "/usr/local/java/trang.jar" \
        "/usr/local/share/java/trang.jar"; do
        if [ -f "$jar" ]; then
          TRANG="java -jar $jar"
          break
        fi
      done
    else 
      # otherwise, look for a non-jar "trang" executable (as in Debian)
      if [ "$(which trang)" ]; then
        TRANG=`which trang`;
      fi
    fi
  fi
fi

# if trang was found, run it
if [ -n "$TRANG" ]; then
  echo "$0: using $TRANG"
  $TRANG $@
else
  # otherwise, exit with an error
  echo "error: cannot locate trang" 1>&2
  exit 1
fi