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#!/bin/sh
# babashka, which the scripts here are written in.
#
# A build script wants the things a shell is bad at — reading deps.edn, hashing
# a file set, holding a path in a variable without quoting it three times — and
# Clojure is already the language this repo is written in.
#
# This used to be a DotSlash manifest, pinning a release of babashka the way
# the native libraries are pinned. It is the flake's now, for the reason the
# flake exists: a bb from `nixpkgs` is one this tree already names a version
# of, so a checkout needs nix and nothing else. DotSlash still answers for the
# desktop libraries — those are jolt-native's releases, which no nixpkgs has —
# but nothing has to be installed to reach *them* any more either, because the
# script that fetches them starts here.
#
# Three answers, in order:
#
# bb on PATH the dev shell puts one there, and so does a machine that
# has its own; either is what the caller meant
# the flake built once and kept alive by the symlink under build/,
# which is a gc root as well as a cache
# the container nix is not on every host this runs on — see CLAUDE.md —
# so a host without one re-enters this script where nix is,
# which is where the scripts want to be anyway
set -e
root=$(CDPATH= cd -- "$(dirname -- "$0")/.." && pwd)
if command -v bb >/dev/null 2>&1; then
exec bb "$@"
fi
link="$root/build/bb"
if command -v nix >/dev/null 2>&1; then
# --out-link rather than --no-link: the path has to survive a gc, and the
# symlink is what roots it. Rebuilt only when it is gone or dangling, so
# the usual case is one readlink.
[ -x "$link/bin/bb" ] || nix build "$root#bb" --out-link "$link" >&2
exec "$link/bin/bb" "$@"
fi
if [ -n "$FRQ_BB_REENTERED" ]; then
echo "scripts/bb: no bb and no nix, inside the container too." >&2
echo "Install babashka, or put a nix on this machine." >&2
exit 1
fi
exec distrobox enter arch -- bash -lc \
"cd $root && FRQ_BB_REENTERED=1 exec scripts/bb \"\$@\"" -- "$@"
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