#!/bin/bash -e

if [[ $# -lt 2 ]]; then

    echo "Usage: ./generate-gcov-report.sh <rel-target-dir> <srcdir> [<srcdir> ... ]"

    exit 1

fi

target_dir=$1

shift

source_dirs=$*

if [[ "${target_dir:0:1}" != '/' ]]; then

    target_dir="$PWD/$target_dir"

fi

summary_file="$target_dir/summary.txt"

mkdir -p "$target_dir"

rm -f "$target_dir"/*.gcov

for dir in $source_dirs; do

	pushd "$dir" > /dev/null

	for file in *.c; do

		find ./ -name "*${file/\.c/.gcda}" -exec gcov {} \; > /dev/null

	done

	find ./ -name "*.gcov" \! -path "*/`basename "$target_dir"`/*" -exec mv {} "$target_dir" \;

	popd > /dev/null

done

echo "========== coverage report ========" > "$summary_file"

for file in "$target_dir"/*.gcov; do

	total=`grep -v " -:" "$file" | wc -l`

	missing=`grep "#####" "$file" | wc -l`

	hit=$((total - missing));

	percent=$((($hit * 100)/$total))

	fname=`basename "$file"`

	printf "%-32s total lines: %4s not tested: %4s (%3s%%)\n" "$fname" "$total" "$missing" "$percent">> "$summary_file"

done

echo "========== =============== ========" >> "$summary_file"