#!/bin/sh
# `cfsh` on PATH, opening shuttle.
#
# The whole of it is a forward to `cf sh`, and that is the point: `bin/cf`
# works out which labs checkout to run from $PWD, and `exec` does not change
# the working directory, so both hops agree on which checkout they mean without
# this file knowing anything about checkouts. A second copy of that lookup here
# would be a second thing to keep in step -- $CF_LABS_ROOT, the walk up past a
# vendored labs, symlinks walked by hand because `readlink -f` is not on a
# stock macOS -- and it would drift.
#
# Pick it up the way `cf` is picked up: `deno task install-cf` installs this
# beside `cf`.
#
# Being a forward is also what lets a copy of this file work anywhere: it finds
# `cf` by name, so it depends on PATH and on nothing about where it sits.

set -e

if ! command -v cf >/dev/null 2>&1; then
  echo "cfsh: no \`cf\` on PATH, and \`cf sh\` is what this runs." >&2
  echo "    Put one there with 'deno task install-cf' from a labs checkout." >&2
  exit 127
fi

exec cf sh "$@"