#!/bin/sh
# Mathew — lean server entrypoint.
#
# In the usual image this does nothing: the built Mathlib already sits under
# the project and the server starts straight away.
#
# With the image built as `--build-arg BAKE_MATHLIB=false` (see README's
# "Keeping Mathlib out of the image"), the project's .lake is meant to be a
# volume: a fresh one gets filled once, at first start, so Mathlib's ~7GB of
# compiled cache never travels through the registry.
set -eu

PROJECT=/opt/lean4web/Projects/MathlibDemo

if [ ! -f "$PROJECT/.lake/build/lib/lean/MathlibDemo.olean" ]; then
  echo "[mathew-lean] $PROJECT/.lake holds no built Mathlib — fetching it once (expect ~10 minutes)"
  cd "$PROJECT"
  # lake update pulls the sources pinned in lake-manifest.json, and Mathlib's
  # post-update hook fetches the matching precompiled cache; lake build then
  # only writes the project's own module. The image's pinned toolchain
  # (elan) stays as it is — no lean-toolchain re-curl, no surprise downloads.
  lake update -R
  lake build
  echo "[mathew-lean] Mathlib ready"
fi

exec "$@"