# Sourced by the dev-*.sh scripts that build before they run.
#
# These scripts run the tests first because a dev loop should not start a
# server that does not work. That is the wrong trade when the point is to have
# something up now — a demo, a screenshot, a second stack alongside one already
# proven — and on a busy machine the test run is most of the wait.
#
# `--no-test` builds and starts without it. Nothing is skipped silently: the
# banner says which of the two happened.

# Reads the build flags out of a script's arguments.
#
# Sets DIDBOT_TESTS and DIDBOT_ARGV rather than returning them, because a
# function cannot rewrite its caller's positional arguments. Callers do:
#
#   read_build_flags "$@"
#   set -- "${DIDBOT_ARGV[@]}"
#
# before anything else reads them, so the flag reaches neither the watch loop
# nor the binary at the end.
read_build_flags() {
    DIDBOT_TESTS=1
    DIDBOT_ARGV=()
    local arg
    for arg in "$@"; do
        case "$arg" in
            --no-test) DIDBOT_TESTS=0 ;;
            *) DIDBOT_ARGV+=("$arg") ;;
        esac
    done
}

# Builds what is about to run, testing it first unless told not to.
#
# Takes the cargo selection to build, such as `-p didbot-swarm`. The build is
# not left to `cargo run`: these scripts print a banner saying the thing is up,
# and a banner that prints before a cold compile is a lie for as long as the
# compile takes.
build_before_running() {
    if [ "${DIDBOT_TESTS:-1}" = 1 ]; then
        printf '\033[1m%s\033[0m\n' "building"
        cargo test --quiet "$@"
    else
        printf '\033[1m%s\033[0m\n' "building (--no-test, so nothing is checked)"
        cargo build --quiet "$@"
    fi
}