#!/usr/bin/env bash
# Run a repo Python script under the activated Hermes environment.
#
# Shebang target for POSIX scripts:
#     #!/usr/bin/env -S bash -c 'exec "$BASH" "$(dirname "$0")/_hermes-python" "$0" "$@"'
#
# The kernel appends the invoking script, so `$1` is the Python file to run
# and `$@` its arguments. Activates when there is no environment to inherit, or
# when the inherited one no longer matches its inputs (scripts/_activation.sh);
# then execs the interpreter on the same file, so tracebacks and __file__ point
# at the real script.
set -u

target=${1:-}
if [ -z "$target" ]; then
    printf 'usage: %s <script.py> [args...]\n' "$0" >&2
    exit 2
fi
shift

_here="$(cd "$(dirname "$target")" && pwd)"
while [ "$_here" != / ] && [ ! -f "$_here/activate" ]; do _here="$(dirname "$_here")"; done
if [ ! -f "$_here/activate" ]; then
    printf '%s: no activate script above %s\n' "$0" "$target" >&2
    exit 1
fi

# shellcheck source=scripts/_activation.sh
. "$_here/scripts/_activation.sh"
hermes_ensure_activated "$_here" || exit 1

exec python3 "$target" "$@"