#!/usr/bin/env bash
# Runs a command in this app's arm64 opam switch (.cache/opam-arm64) inside
# the emulated Debian arm64 root, creating the switch on first use. The
# compiler is the root's Debian OCaml 5.3.0, used as ocaml-system; every
# library, SQLite included, is compiled from source into .cache, from the
# versions in todo_ocaml.opam.locked and tools/sqlite.sh.
#   tools/arm64.sh <command> [args...]
set -euo pipefail
app=$(cd "$(dirname "$0")/.." && pwd)
if [ -z "${IN_ARM64_ROOT:-}" ]; then
  "$app/tools/sqlite.sh" fetch
  exec "$app/../../scripts/arm64.sh" /usr/bin/env IN_ARM64_ROOT=1 \
    APP_VERSION="${APP_VERSION:-dev}" LINK_FLAGS="${LINK_FLAGS:-}" "$app/tools/arm64.sh" "$@"
fi
# The root is shared: keep dune's cache off so nothing lands in its /root.
export OPAMROOT=$app/.cache/opam-arm64 OPAMYES=1 OPAMCOLOR=never DUNE_CACHE=disabled
# SQLite is compiled here too, not taken from the root's libsqlite3-dev.
"$app/tools/sqlite.sh" build "$app/.cache/sqlite-arm64"
export PKG_CONFIG_PATH=$app/.cache/sqlite-arm64/lib/pkgconfig
if [ ! -d "$OPAMROOT/default" ]; then
  [ -f "$OPAMROOT/config" ] || opam init -q --bare -n --disable-sandboxing default https://opam.ocaml.org
  opam switch remove -q default >/dev/null 2>&1 || true   # forget one make clean-deps deleted
  opam switch create -q default ocaml-system.5.3.0
fi
if [ ! -f "$OPAMROOT/default/.deps-installed" ] || [ "$app/todo_ocaml.opam.locked" -nt "$OPAMROOT/default/.deps-installed" ]; then
  (cd "$app" && opam install -q --switch default --deps-only --locked .)
  touch "$OPAMROOT/default/.deps-installed"
fi
exec opam exec --switch default -- "$@"