#!/usr/bin/env bash

# Script to do automated testing and data collection
# for various test files, so that we don't have to do this by hand on
# every test file.  It attempts to collect some diagnostic info about
# size and speed that should be useful in the future as the library
# gets tuned for size and speed. In addition, it tests static and
# shared linkage.

# Invocation 
# mkcheck [012] (path to build) (path to src) (path to install)

#
# 1: variables
#
# WHICH determines if you are
# (0) testing the build binary and headers, or
# (1) testing the installed binary and headers, or
# (2) testing under dejagnu (just print the standard flags needed).
WHICH=$1
if [ "$WHICH"x = 0x ] && [ $# -eq 3 ]; then
  echo "running mkcheck"
  echo "$0: testing the build directory"
elif [ "$WHICH"x = 1x ] && [ $# -eq 4 ]; then
  echo "running mkcheck"
  echo "$0: testing the install directory $4"
elif [ "$WHICH"x = 2x ] && [ $# -eq 3 ]; then
  true
else
  echo 'Usage: mkcheck 0 (path to build) (path to src)'
  echo '       mkcheck 1 (path to build) (path to src) (path to install)'
  echo '       mkcheck 2 (path to build) (path to src)'
  exit 1;
fi
  
BUILD_DIR=$2
if [ ! -d "$BUILD_DIR" ]; then
  echo "build directory $BUILD_DIR not found, exiting."
  exit 1
fi

SRC_DIR=$3
if [ ! -d "$SRC_DIR" ]; then
  echo "source directory $SRC_DIR not found, exiting."
  exit 1
fi

if [ $WHICH -eq 1 ]; then 
    PREFIX_DIR=$4
    if [ ! -d "$PREFIX_DIR" ]; then
    echo "install directory $PREFIX_DIR not found, exiting."
    exit 1
    fi
fi

# INC_PATH == include path to new headers for use on gcc command-line
C_DIR="`basename @C_INCLUDE_DIR@`"
if [ $WHICH != "1" ]; then
  INC_PATH="@CSHADOW_FLAGS@ -I$BUILD_DIR -I$BUILD_DIR/libio \
    -I$SRC_DIR/include/std  -I$SRC_DIR/include/$C_DIR \
    -I$SRC_DIR/include -I$SRC_DIR/libsupc++/include -I$SRC_DIR/libio \
    -I$SRC_DIR/testsuite"
elif [ $WHICH -eq 1 ]; then
  INC_PATH="-I$SRC_DIR/testsuite"
fi

if [ $WHICH -eq 2 ]; then
  echo $INC_PATH -I$SRC_DIR/backward -I$SRC_DIR/ext
  exit 0;
fi

#LIB_PATH == where to find the build library binaries.
if [ $WHICH != "1" ]; then
  LIB_PATH="$BUILD_DIR/src/.libs"
  CXX="../../gcc/g++"
  CXX_BASE="-B../../gcc/"
elif [ $WHICH -eq 1 ]; then
  LIB_PATH="$PREFIX_DIR/lib"
  CXX="$PREFIX_DIR/bin/g++"
  CXX_BASE=""
fi

# gcc compiler flags
#CXX_FLAG="-fsquangle -fhonor-std -fnew-exceptions -g -O2 -DDEBUG_ASSERT "
#CXX_FLAG="-g -O2 -DDEBUG_ASSERT "
CXX_FLAG="-g $CXX_BASE -DDEBUG_ASSERT @SECTION_FLAGS@ @SECTION_LDFLAGS@"

# a specific flag(s) to force the use of shared libraries, if any
SH_FLAG=""

# a specific flag(s) to force the use of static libraries, if any
ST_FLAG="-static"

# Set up the testing directory, which should be in a directory called
# "testsuite" in the root level of the build directory.
TEST_DIR="`pwd`/testsuite"
if [ ! -d "$TEST_DIR" ]; then
    echo "making directory $TEST_DIR"
    mkdir $TEST_DIR
    chmod 777 $TEST_DIR
fi

# the name of the file that will collect and hold all this useful data:
RESULTS_FILE="$TEST_DIR/$(date +%Y%m%d)-mkcheck.txt"

# the name of the log file that will append compiler diagnostics:
LOG_FILE="$TEST_DIR/$(date +%Y%m%d)-mkchecklog.txt"

# the names of the specific test files to be run
TESTS_FILE="$TEST_DIR/$(date +%Y%m%d)-mkcheckfiles.txt"


#
# 2: clean, make files, append general test info
#
if [ -f $RESULTS_FILE ]; then
    rm $RESULTS_FILE
fi
if [ -f $LOG_FILE ]; then
    rm $LOG_FILE
fi

# Make a list of the files we're going to run, or use an old one if it exists.
if [ ! -f "$TESTS_FILE" ]; then
    echo "making file $TESTS_FILE"
    for LONG_NAME in $SRC_DIR/testsuite/*/*.cc
    do
	DIR_NAME=$(dirname $LONG_NAME)
	SHORT_NAME="`basename $DIR_NAME`/`basename $LONG_NAME`"
	echo "$SHORT_NAME" >> $TESTS_FILE
    done
fi

# Nasty solution to replace GNU date(1)'s %s time_t output function.
if [ ! -x "$TEST_DIR/printnow" ]; then
    echo "making utility $TEST_DIR/printnow"
    gcc -o "$TEST_DIR/printnow" "$SRC_DIR/testsuite/printnow.c"
    strip "$TEST_DIR/printnow"
fi

# Remove old executables.
rm -rf "$TEST_DIR"/*exe

# Remove old core files (which now get left in cwd, not $TEST_DIR).
rm -rf ./*core

# Copy over the data files for filebufs in read-only mode
cp $SRC_DIR/testsuite/27_io/*.txt $TEST_DIR
cp $SRC_DIR/testsuite/27_io/*.tst $TEST_DIR
chmod u+w $TEST_DIR/*.txt
chmod u+w $TEST_DIR/*.tst

# Emit useful info about compiler and platform
echo "host: $(uname -mrsv)" >> $RESULTS_FILE
echo "compiler: $($CXX -v 2>&1 | tail -1)" >> $RESULTS_FILE
echo "compiler flags: $CXX_FLAG" >> $RESULTS_FILE
echo "date: $(date +%Y%m%d)" >> $RESULTS_FILE
echo "" >> $RESULTS_FILE

echo "p == pass/fail execution test" >> $RESULTS_FILE
echo "ctime == time to compile and link" >> $RESULTS_FILE
echo "etime == time for executable to run" >> $RESULTS_FILE
echo "text == size of the executable text section" >> $RESULTS_FILE
echo "data == size of the executable data section" >> $RESULTS_FILE
echo "total == size of the executable" >> $RESULTS_FILE
echo "" >> $RESULTS_FILE
echo "(First static, then shared.)" >> $RESULTS_FILE

echo "p" | awk '{printf("%s ", $1)}' >> $RESULTS_FILE
echo "ctime" "etime" | awk '{printf("%s\t%s\t", $1, $2)}' >> $RESULTS_FILE
echo "text" "data" | awk '{printf("%s\t%s\t", $1, $2)}' >> $RESULTS_FILE
echo "total" "name" | awk '{printf("%s\t%s\t", $1, $2)}' >> $RESULTS_FILE
echo "" >> $RESULTS_FILE
    

#
# 3: compile, link, execute, time
#
# Abstract out the common code for compiling, linking, executing and printing.
test_file()
{
    # NB: S_FLAG has to be last argument because it may be null, and
    # error checking hasn't been invented yet.
    NAME=$1
    EXENAME=$2
    S_FLAG=$3

    SRC_NAME="$SRC_DIR/testsuite/$1"
    TEST_NAME="$TEST_DIR/`basename $NAME`"

    # This would be deliciously easy if GNU date's %s were always around.
    # There are three ways to do this:  1) use the builtin 'time' like we
    # do later; then getting compiler errors into LOG_FILE is a nightmare.
    # 2) Grab the output of a formatted date(1) and do the math; harder
    # and harder as we try compiling at, say, top of the hour; we would
    # eventually have to calculate time_t anyhow.  Or 3) just grab two
    # time_t's (no more overhead than grabbing two date(1)'s).
    COMP_TIME_START=$($TEST_DIR/printnow)
    $CXX $CXX_FLAG $S_FLAG $INC_PATH -L$LIB_PATH -Wl,--rpath -Wl,$LIB_PATH \
         $SRC_NAME -o $EXENAME 2>> $LOG_FILE
    COMP_TIME_END=$($TEST_DIR/printnow)

    if [ $COMP_TIME_START -lt $COMP_TIME_END ]; then
	C_TIME=$[ $COMP_TIME_END - $COMP_TIME_START ]
    else
	C_TIME="0"
    fi

    if [ -f $EXENAME ]; then
        case @host_os@ in
          *solaris2.8*)
            # These numbers seem to match up to text/data/total,
            # although their meanings seem to be different.  Very
            # important to not compare these numbers across platforms.
            ## Get rid of the banner information.  I don't recall this
            ## happening under previous Solarises.  Maybe it's an 8 thing.
            TEXT="$(size $EXENAME | grep $EXENAME | awk '{print $1}')"
            DATA="$(size $EXENAME | grep $EXENAME | awk '{print $3}')"
            SIZE="$(size $EXENAME | grep $EXENAME | awk '{print $7}')"
            ;;
          *solaris*)
            # These numbers seem to match up to text/data/total,
            # although their meanings seem to be different.  Very
            # important to not compare these numbers across platforms.
            TEXT="$(size $EXENAME | awk '{print $1}')"
            DATA="$(size $EXENAME | awk '{print $3}')"
            SIZE="$(size $EXENAME | awk '{print $7}')"
            ;;
          *)
            TEXT="$(size -A $EXENAME | grep text | awk '{print $2}')"
            DATA="$(size -A $EXENAME | grep data | awk '{print $2}')"
            SIZE="$(size -A $EXENAME | grep otal | awk '{print $2}')"
            ;;
        esac

        # Actually run the executable and time it . . .
        TIMEFORMAT='timemark %R'
        E_TIME_TEXT="$(exec 2>&1; time $EXENAME)"
	E_ABNORMAL_TERMINATION=$?
        E_TIME="$(echo $E_TIME_TEXT | awk '{print $2}')"
        # joining those two commands does not work due to quoting problems:
        #E_TIME="$(exec 2>&1; time $EXENAME | awk '{print $2}')"
        # this will work as a fallback on certain systems...?
        #E_TIME=$(exec 2>&1; time $EXENAME | cut -d ' ' -f 2)
 
       if [ "$E_ABNORMAL_TERMINATION" -ne 0 ]; then
            RESULT='-'
	    rm -f ./*core
	    # sometimes you want to save all core files for review:
	    #mv ./core $EXENAME.core
	    # sometimes the OS names core files as programname.core:
	    #mv ./*core $EXENAME.core
	else
	    # XXX this should probably be a function? 

	    # This checks for emitted output files, which is useful
	    # when testing file-related output. The rules for this
	    # working are as follows: the emitted file must have the
	    # ".txt" extension, and be based on the actual *.cc file's
	    # name. For example, 27/filbuf.cc currently outputs files
	    # named 27/filebuf-2.txt and 27/filebuf-3.txt. Also, the first
	    # emitted file must be in the form $NAME-1.txt. The
	    # control file must follow the same constraints, but have
	    # a ".tst" extension. Thus, you have 27/filebuf-2.tst, etc
	    # etc.

	    # NAME contains the source name, like 27/filebuf.cc
	    # From that NAME, we want to generate some possible names, using
	    # ls on MATCH, a pattern description generated with sed.

	    # this is the name of the resulting diff file, if any
	    DIFF_FILE="`echo $TEST_NAME | sed 's/cc$/diff/'`"
	    # construct wildcard names,ie for $NAME=filebuf.cc, makes
	    # "filebuf*.tst"
	    DATA_FILES="`echo $NAME | sed 's/\.cc/\*\.tst/g'`"
	    # make sure there is at least one, then go
	    ST_E="`echo $NAME | sed 's/\.cc/\-1\.tst/g'`"
	    if [ -f $ST_E ]; then
		# list of actual files that match the wildcard above, ie
		# "filebuf-1.tst"
		ST_MATCH_LIST="`ls $DATA_FILES`"
		for i in $ST_MATCH_LIST
		    do
			# ST_OUT_FILE is generated in the build directory.
			PRE_NAME2="$TEST_DIR/`basename $i`"
			ST_OUT_FILE="`echo $PRE_NAME2 | sed 's/tst$/txt/'`"
			diff $ST_OUT_FILE $i > $DIFF_FILE
			if [ -s $DIFF_FILE ]; then
			    RESULT="-"
			    echo "$ST_OUT_FILE has some problems, dude"
			else
			    RESULT="+"
			fi
			rm $DIFF_FILE
		    done
		else
		    # the file does no output, and didn't abnormally
		    # terminate, so assume passed.
		    RESULT="+"
		fi
	    fi
	# sometimes you want to save all failing exe files for review:
	if [ "$RESULT" = "+" ]; then
	    rm "$EXENAME"
	fi
    else
        # the file did not compile. Write out compilation info to the log file.
 echo "$CXX $CXX_FLAG $S_FLAG $INC_PATH -L$LIB_PATH -Wl,--rpath -Wl,$LIB_PATH \
         $SRC_NAME -o $EXENAME" 2>> $LOG_FILE

	RESULT="-"
	TEXT="0"
	DATA="0"
	SIZE="0"
    fi

    echo $RESULT | awk '{printf("%s\t", $1)}'
    echo $RESULT | awk '{printf ("%.1s ", $1)}'>>$RESULTS_FILE
    echo $C_TIME $E_TIME |awk '{printf("%d\t%.3f\t", $1, $2)}'>>$RESULTS_FILE
    echo $TEXT $DATA | awk '{printf("%s\t%s\t", $1, $2)}'>>$RESULTS_FILE
    echo $SIZE | awk '{printf("%s\t", $1)}'>>$RESULTS_FILE
    echo $NAME | awk '{printf("%s\n", $1)}'>>$RESULTS_FILE
};    

echo "detailed test information in $RESULTS_FILE"
echo "------------------------------------------------------------------------"
echo "static" | awk '{printf("%s\t", $1)}'
echo "shared" | awk '{printf("%s\t", $1)}'
echo "test" | awk '{printf("%s\n", $1)}'
echo "------------------------------------------------------------------------"

TEST_TIME_START=$($TEST_DIR/printnow)
for NAME in `cat $TESTS_FILE`
do
    PRE_NAME="$TEST_DIR/`basename $NAME`"
    ST_NAME="`echo $PRE_NAME | sed 's/cc$/st-exe/'`"
    SH_NAME="`echo $PRE_NAME | sed 's/cc$/sh-exe/'`"

    test_file $NAME $ST_NAME $ST_FLAG 
    test_file $NAME $SH_NAME $SH_FLAG 
    echo "$NAME" | awk '{printf("%s\n", $1)}'

    echo "" >> $RESULTS_FILE
done
TEST_TIME_END=$($TEST_DIR/printnow)


#
# 4: summary
#
# grep can count faster than we can...
total_failures=$(egrep -c "^\-" $RESULTS_FILE)
total_successes=$(egrep -c "^\+" $RESULTS_FILE)
resultstext="pass/fail results:  ${total_successes}/${total_failures}"
if [ $total_failures -eq 0 ]; then
    resultstext="${resultstext}, WIN WIN"
fi
sed -e "/^date:/a\\
$resultstext" $RESULTS_FILE > ${RESULTS_FILE}.tmp
mv ${RESULTS_FILE}.tmp $RESULTS_FILE

if [ $TEST_TIME_START -lt $TEST_TIME_END ]; then
    TEST_TIME=$[ $TEST_TIME_END - $TEST_TIME_START ]
    echo "testrun == $TEST_TIME"
    echo "testrun == $TEST_TIME" >> $RESULTS_FILE
fi

exit 0