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#!/usr/bin/env bash
# build-aux/gcov-prune - Prune old GCC coverage files
#
# Copyright (C) 2025 Luke T. Shumaker <lukeshu@lukeshu.com>
# SPDX-License-Identifier: AGPL-3.0-or-later
set -e
[[ $# == 1 ]]
sourcedir="$(realpath -- .)"
builddir="$(realpath -- "$1")"
# `gcc` writes .gcno
# Running the program writes .gcda (updates existing files, concurrent-safe)
# GCC `gcov` post-processes .gcno+.gcda to .gcov
# `gcovr` is a Python script that calls `gcov` and merges and post-processes the .gcov files to other formats
# Prune orphaned .gcno files.
find "$builddir" -name '*.gcno' -printf '%P\0' | while read -d '' -r gcno_file; do
rel_base="${gcno_file%/CMakeFiles/*}"
src_file="$gcno_file"
src_file="${src_file#*/CMakeFiles/*.dir/}"
src_file="${src_file%.gcno}"
src_file="${src_file//__/..}"
src_file="$rel_base/$src_file"
if [[ ! -e "$sourcedir/$src_file" || "$sourcedir/$src_file" -nt "$builddir/$gcno_file" ]]; then
rm -fv -- "$builddir/$gcno_file"
fi
done
# Prune all .gcda files.
find "$builddir" -name '*.gcda' -delete
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