#!/usr/bin/env bash

# Build the oak-engine protocol-transport binary.

#

# oakvcs-core is consumed by PATH (not confirmed on crates.io). oak-engine's

# manifest is a committed template (Cargo.toml.in); this script resolves a local

# oak `core/` checkout, renders a gitignored Cargo.toml with its ABSOLUTE path

# (required so Cargo resolves oakvcs-core's workspace-inherited deps against the

# oak workspace root), and runs the release build.

#

# Usage:  ./build-engine.sh [OAK_CORE_PATH]

#   OAK_CORE_PATH  path to an oak `core/` dir (the crate `oakvcs-core`).

#                  Falls back to $OAK_CORE_PATH, then autodetection.

set -euo pipefail

cd "$(dirname "$0")"

CORE="${1:-${OAK_CORE_PATH:-}}"

if [[ -z "$CORE" ]]; then

  # Autodetect: a sibling oak checkout, the canonical checkout, then any

  # worker-*/oak/core. First hit that has Cargo.toml wins.

  for cand in \

    ../../oak/core \

    /Users/mrmrs/o/oak/core \

    $(ls -dt /Users/mrmrs/o/worker-*/oak/core 2>/dev/null); do

    if [[ -f "$cand/Cargo.toml" ]]; then CORE="$cand"; break; fi

  done

fi

if [[ -z "$CORE" || ! -f "$CORE/Cargo.toml" ]]; then

  echo "error: could not find an oak core/ checkout. Pass one:" >&2

  echo "  ./build-engine.sh /path/to/oak/core" >&2

  exit 1

fi

CORE="$(cd "$CORE" && pwd)"

echo "oak-engine: using oakvcs-core at $CORE"

# Render the gitignored manifest from the template.

sed "s#@OAK_CORE@#$CORE#g" oak-engine/Cargo.toml.in > oak-engine/Cargo.toml

cargo build --release --manifest-path oak-engine/Cargo.toml

echo "oak-engine: built → oak-engine/target/release/oak-engine"