#! /bin/sh
#
# This is the test script for the CGAL-library.
#
# Usage:
#   run_testsuite                  for running the test suite in all subdirectories
#   run_testsuite <directory-list> for running the test suite in the listed
#                                  subdirectories
#
# To use this script you have to do two things:
#
# 2) set some additional compiler and or linker flags

TESTSUITE_CXXFLAGS=""
TESTSUITE_LDFLAGS=""

CURRENTDIR=`pwd`
ERRORFILE=${CURRENTDIR}/error.txt
if [ -n "$CGAL_TEST_PLATFORM" ]; then
    PLATFORM=$CGAL_TEST_PLATFORM
else
    PLATFORM=no-platform
fi
if [ -n "${CGAL_TIMEOUT_PROG+x}" ]; then
    TIMEOUT=$CGAL_TIMEOUT_PROG
else
    TIMEOUT=`which timeout`
    [ -z "$TIMEOUT" ] && TIMEOUT=`which gtimeout`
fi

#clear the error file
rm -f "$ERRORFILE"
touch "$ERRORFILE"

# On Cygwin, killing bash does not kill jobs it has spawned.  This
# function takes a PID as argument and prints the list of children
# processes of this process, including itself.
process_tree()
{
  local pid=$1
  local result=
  echo $pid
  ps -a | awk '!/^ +PID/ {print $1 " " $2}' | {
      while read apid appid; do
	  if [ "$appid" = "$pid" ]; then
	      process_tree $apid
	  fi
      done
  }
}

# Wait for process with pid $1.
# Wait for $2 periods of $3 seconds, checking after every period
# if the watched process has finished.
wait_for_process()
{
    pid=$1;
    cycles=$2
    period=$3
    while [ $cycles -ne 0 ]
    do
        cycles=`expr $cycles - 1`
# send SIGCONT to the process and check the exit value of kill.
# If the process still exists, the call to kill succeeds (and the signal is
# ignored).

        kill -CONT $pid 2>kill_output 1>/dev/null;   terminated=$?
# But under CYGWIN the exit status is not to be trusted.
	if [ $terminated -eq 0 ]; then
	    if grep -i 'no such process' kill_output; then
		terminated=1;
	    fi
	fi
	rm -f kill_output
	if [ $terminated -eq 0 ]
        then
            sleep $period
        else
            cycles=0
            running=0
        fi
    done
    if [ $terminated -eq 0 ]
    then
    	if false; then
# Send signal Terminate (SIGTERM) to the whole process group.
# First disable the default action (quit) for the current process.
	    trap true TERM
	    kill -TERM 0
	    trap TERM
	else

	    # $pid is the PID of the forked shell that launched the command
	    # in background, in run_local_cgal_test(). If the shell is
	    # Bash, the Bash manual states that it ignores SIGTERM.
	    # However, it does not catch SIGHUP. That is why the first
	    # signal send is SIGHUP.
	    case "`uname`" in
		CYGWIN*)
		    pids=`process_tree $pid`;;
		*) pids=$pid;;
	    esac
	    for p in $pids; do kill -HUP $p; done
	    sleep 10
	    # If SIGHUP was not enough, SIGKILL will finish the job, 10s after.
	    for p in $pids; do kill -KILL $p 2>/dev/null; done
	fi
        return 1
    fi
    return 0
}

run_local_cgal_test()
{
    # Workaround an issue on Windows when GNU Make is used for "make -f
    # makefile2" but nmake is used after.
    MAKEFLAGS=
    export MAKEFLAGS

    if [ -n "$TIMEOUT" ]; then
        "$TIMEOUT" $(( $TIME_PERIOD * 5 )) ./cgal_test_with_cmake > current_compiler_output 2>&1
    else
        ./cgal_test_with_cmake > current_compiler_output 2>&1
    fi
    exit_value=$?
    if [ $exit_value -ne 0 ]
    then
         printf "%s\n" "$exit_value" > test_failure
    fi
    return $exit_value
}

#test_directory <directory> <already_here>
#   test_directory() may call itself once: the second parameter avoids that
#   it calls itself infinitely.
test_directory()
{
  cd "$CURRENTDIR"
  if [ -d $1 ] ; then
    echo "DIRECTORY $1:"
    echo

    echo "DIRECTORY $1:"                 >> "$ERRORFILE"
    echo                                 >> "$ERRORFILE"
    cd "$1"

    COMPILER_OUTPUT=CompilerOutput_$PLATFORM
    rm -f "$COMPILER_OUTPUT"
    ERROR_OUTPUT=ErrorOutput_$PLATFORM
    rm -f "$ERROR_OUTPUT"

    echo "------------------------------------------------------------------" >> "$COMPILER_OUTPUT"
    echo "- Compiler output from platform $PLATFORM"                          >> "$COMPILER_OUTPUT"
    echo "------------------------------------------------------------------" >> "$COMPILER_OUTPUT"
    echo                                                                      >> "$COMPILER_OUTPUT"

    echo "------------------------------------------------------------------" >> "$ERROR_OUTPUT"
    echo "- Error output from platform $PLATFORM"                             >> "$ERROR_OUTPUT"
    echo "------------------------------------------------------------------" >> "$ERROR_OUTPUT"
    echo                                                                      >> "$ERROR_OUTPUT"

    if [ -f cgal_test_with_cmake -a -x cgal_test_with_cmake ] ; then
      export PLATFORM TESTSUITE_CXXFLAGS TESTSUITE_LDFLAGS
      rm -f error.txt
      START=`date +%s`
      TIME_PERIOD=1200
      if [ "$1" = "Polyhedron_Demo" ]; then
        TIME_PERIOD=2400
      fi
      if [ -n "$TIMEOUT" ]; then
          run_local_cgal_test
          return_code=$?
          if [ $return_code -eq 124 ]; then
	      echo "ERROR: cgal_test_with_cmake did not finish within the time bound set" >> "$ERRORFILE"
	      echo "ERROR: cgal_test_with_cmake did not finish within the time bound set" >> "$ERROR_OUTPUT"
          else
	      if [ -f test_failure  ] ; then
                  exit_failure=`cat test_failure`
	          rm -f test_failure
	          echo "ERROR: cgal_test_with_cmake exited with error condition $exit_value" >> "$ERRORFILE"
	          echo "ERROR: cgal_test_with_cmake exited with error condition $exit_value" >> "$ERROR_OUTPUT"
	      fi
          fi
      else
          run_local_cgal_test &

          if wait_for_process "$!" "$TIME_PERIOD" "5"
          then
	      if [ -f test_failure  ] ; then
                  exit_failure=`cat test_failure`
	          rm -f test_failure
	          echo "ERROR: cgal_test_with_cmake exited with error condition $exit_value" >> "$ERRORFILE"
	          echo "ERROR: cgal_test_with_cmake exited with error condition $exit_value" >> "$ERROR_OUTPUT"
	      fi
          else
	      echo "ERROR: cgal_test_with_cmake did not finish within the time bound set" >> "$ERRORFILE"
	      echo "ERROR: cgal_test_with_cmake did not finish within the time bound set" >> "$ERROR_OUTPUT"
          fi
      fi
      STOP=`date +%s`
      DURATION=`expr "$STOP" - "$START"`
      printf "      # Running time: %s (seconds)\n\n" "$DURATION" >> "$ERRORFILE"
      printf "      # Running time: %s (seconds)\n\n" "$DURATION" >> "$ERROR_OUTPUT"
      cat current_compiler_output >> "$COMPILER_OUTPUT"
      cat current_compiler_output
      rm -f current_compiler_output

      if [ -f error.txt ] ; then
        cat error.txt >> "$ERRORFILE"
        cat error.txt >> "$ERROR_OUTPUT"
      else
        echo "ERROR: the script cgal_test_with_cmake failed to generate output" >> "$ERRORFILE"
      fi
    else
      if [ -z "$2" ]; then
        create_cgal_test
        test_directory "$1" "second_time"
      else
        echo "      Could not execute the script cgal_test_with_cmake in directory $1"
        echo "ERROR: could not execute the script $1/cgal_test_with_cmake" >> $ERRORFILE
      fi
    fi
    echo >> "$ERRORFILE"
    echo >> "$ERROR_OUTPUT"
  fi
  echo
}

run_testsuite()
{

  echo "---------------------------------------------------------------"
  echo "- Testing platform $PLATFORM"
  echo "---------------------------------------------------------------"
  echo

  echo "---------------------------------------------------------------" >> "$ERRORFILE"
  echo "- TEST RESULTS FROM PLATFORM $PLATFORM"                          >> "$ERRORFILE"
  echo "---------------------------------------------------------------" >> "$ERRORFILE"
  echo                                                                   >> "$ERRORFILE"

  case "`uname`" in
      CYGWIN*)
          PATH=`cygpath "$CGAL_DIR"`/bin:`cygpath "$CGAL_DIR"`/lib:$PATH
          export PATH
  esac

  for DIR in $TEST_DIRECTORIES ; do
    if [ ! -f $DIR/skipped ]; then
      test_directory "$DIR"
    fi
  done
}

[ x"$1" = x"icons" -o x"$1" = x"resources" ] && exit 0

if [ -z "$1" ] ; then
  TEST_DIRECTORIES=`ls | egrep -v 'icons|resources'`
else
  TEST_DIRECTORIES="$*"
fi

run_testsuite