# Shared helper for libFuzzer corpus builder scripts.## Usage from a fuzz target-specific builder:##   root="$(readlink -f -- "$1")"#   output_corpus="$2"#   source "$root/etc/fuzz-corpus-builder.sh"#   build_fuzz_corpus "$root" "$output_corpus" "gix-pack" "index_file"## The target-specific script is invoked by Google OSS Fuzz and# their build script at https://github.com/google/oss-fuzz/blob/master/projects/gitoxide/build.sh# with the repository root and the output zip path.# This helper adds all files from:##   <crate>/fuzz/corpus/<target>/*## If present, it also adds files from:##   <crate>/fuzz/artifacts/<target>/*## Corpus files and artifact files are zipped with `-j`, matching the flat corpus# archive layout it expects. Empty input groups are skipped so artifact-only# targets can still produce a corpus archive. Artifacts are added in a separate# zip invocation so a duplicate basename updates the archive instead of making# zip fail with "cannot repeat names in zip file".build_fuzz_corpus() {    local root="$1"    local output_corpus="$2"    local crate="$3"    local target="$4"    local fuzz_dir    local corpus_dir    local artifacts_dir     fuzz_dir="$(readlink -f -- "$root/$crate/fuzz")"    corpus_dir="$fuzz_dir/corpus/$target"    artifacts_dir="$fuzz_dir/artifacts/$target"     echo "$root"    echo "$corpus_dir"    echo "$artifacts_dir"     shopt -s nullglob     local corpus_files=("$corpus_dir"/*)    if ((${#corpus_files[@]})); then        zip -j "$output_corpus" "${corpus_files[@]}"    fi     if [[ -d "$artifacts_dir" ]]; then        local artifact_files=("$artifacts_dir"/*)        if ((${#artifact_files[@]})); then            # A second zip invocation updates duplicate basenames instead of aborting.            zip -j "$output_corpus" "${artifact_files[@]}"        fi    fi}