rustcov

# #!/usr/bin/env bash

# From
#
# https://doc.rust-lang.org/nightly/unstable-book/compiler-flags/instrument-coverage.html
#
# and
#
# https://marco-c.github.io/2020/11/24/rust-source-based-code-coverage.html

## Do this first:

# rustup component add llvm-tools-preview
# cargo install cargo-binutils
# cargo profdata -- --help
# cargo install grcov

cmdname=`basename $0`

usage() {
  exitcode="$1"
  cat << USAGE >&2
Usage:
  $cmdname [options]
  -h   Show this message
USAGE
  exit "$exitcode"
}

while getopts "h" opt ; do
  case $opt in
    h) usage 0 ;;
  esac
done

# echo cargo +nightly test "${@:$OPTIND}"

cargo clean

RUSTFLAGS="-Z instrument-coverage" \
  LLVM_PROFILE_FILE="testing-%m.profraw" \
  cargo +nightly test "${@:$OPTIND}"

mkdir -p target/coverage

grcov . -b target/debug/deps \
      -s . -t html --ignore 'target/*' --ignore '/*' \
      --ignore-not-existing -o ./target/coverage

rm -f testing-*.profraw