#!/bin/bash
#
# Get coverage information from running swipl
#
# This  script  must  be  executed  from    the  build  directory  after
# configuring SWI-Prolog using -DGCOV=ON. Our convention  is to create a
# file `configure` in the build directory like this:
#
#     CC=gcc-10 CXX=g++-10 cmake -DGCOV=ON -G Ninja ..
#
# The `CC=gcc-10` is used by this script to find the matching version of
# the gcov tool.  The script taks these steps:
#
#   - Remove all .gcov and .gcda files
#   - Run src/swipl $*
#   - Fix up the names of the .gcda files as cmake calls the output
#     files base.c.o, creating base.c.gcda while gcov looks for
#     base.gcda.
#   - Find all annotated sources by collecting the source file names
#     that belong to the generated .gcda files
#   - Run gcov
#
# Particularly useful are the following, the  first testing coverage for
# PGO optimization and the second for  the   test  suite.  Note that the
# second only covers the core tests, not the package tests.
#
#     ../scripts/gcov-swipl ../bench/run.pl
#     ../scripts/gcov-swipl -q ../src/test.pl

gcov=gcov
if [ -f configure ]; then
  ccv=$(sed 's/.*CC=gcc-\([0-9][0-9]*\).*/\1/' < configure)
  case "$ccv" in
    [0-9]*) gcov=gcov-$ccv
	    ;;
  esac
fi

if [ ! -x src/swipl ]; then
  echo "Cannot find src/swipl.  Please run this script in the build dir"
  exit 1
fi

echo "Cleaning old output ..."
find . \( -name '*.c.gcda' -o -name '*.gcov' \) -exec rm {} +

echo "Runing src/swipl $* ..."
src/swipl $*

echo "Fixing up coverage file names ..."
for f in $(find . -name '*.c.gcno' -o -name '*.c.gcda'); do
  noc=$(echo $f | sed 's/\.c\././')
  mv $f $noc
done

src=
for f in $(find . -name '*.gcda'); do
  src+=" $(echo $f | sed 's/\.gcda/.c/')"
done

echo "Creating coverage files using $gcov ..."
$gcov $src > GCOV-Summaries

cat << EOF
Summary:

Covered:     $(cat *.gcov | grep -c '^ *[0-9][0-9]*:')
Not covered: $(cat *.gcov | grep -c '^ *#####:')
No code:     $(cat *.gcov | grep -c '^ *-:')
Total:       $(cat *.gcov | wc -l)
EOF

echo "All done"