#!/usr/bin/env bash
# Build `sylpheed-cli` from the SAME revision of sylpheed-formats the exporter
# is pinned to, and put it on the persistent target volume.
#
#   build-reference-cli       -> $CARGO_TARGET_DIR/release/sylpheed-cli
#
# Why not just use /reborn/target/release/sylpheed-cli: that binary is built
# from whatever /reborn's working tree is at, which is a LIVE mount of the other
# agent's checkout and moves under you mid-iteration. `sylpheed-cli screen
# render` is the reference the Godot port is diffed against, so if it runs
# different decoders than the exporter, a pixel disagreement has a free variable
# in it and proves nothing about the port.
#
# The pinned source lives in CARGO_HOME, which is on the container overlay and
# does not survive a fresh container -- cargo re-fetches it. The BINARY goes to
# CARGO_TARGET_DIR, which is a volume, so this is a one-off per image.
#
# Jobs are capped for the same reason as build-export.
set -euo pipefail
cd "${PROJECT_DIR:-/work}"
export CARGO_BUILD_JOBS="${CARGO_BUILD_JOBS:-3}"

rev=$(sed -n 's/.*Syplheed-Reborn\.git", rev = "\([0-9a-f]*\)".*/\1/p' \
      crates/sylpheed-export/Cargo.toml | head -1)
[ -n "$rev" ] || { echo "build-reference-cli: no rev pin found in Cargo.toml" >&2; exit 1; }

# The checkout only exists once cargo has fetched it; a fresh container has not.
find_checkout() {
  find "${CARGO_HOME:?}/git/checkouts" -maxdepth 2 -type d -name "${rev}*" 2>/dev/null | head -1
}
src=$(find_checkout)
if [ -z "$src" ]; then
  echo "build-reference-cli: fetching the pinned decoders ($rev)"
  cargo fetch
  src=$(find_checkout)
fi
[ -n "$src" ] || { echo "build-reference-cli: no checkout for rev $rev" >&2; exit 1; }

echo "build-reference-cli: building sylpheed-cli from $rev"
cargo build --release --manifest-path "$src/Cargo.toml" -p sylpheed-cli

out="$CARGO_TARGET_DIR/release/sylpheed-cli"
"$out" screen list "${SYLPHEED_DISC:-/disc}/dat/GP_TITLE.pak" >/dev/null \
  || { echo "build-reference-cli: built, but 'screen list' failed" >&2; exit 1; }
echo "build-reference-cli: $out  (rev $rev, 'screen' subcommand present)"