#!/usr/bin/env bash
# Builds the client, `knotless`, `git-remote-knotless` and `knotless-mcp`,
# and the accounts that work for a repository, `knotless-run` (its runner),
# `knotless-triage` (its labeller) and `knotless-agent` (its reviewer, with
# the `knotless-claude-review` script it runs), for every target the install script fetches, as one archive per target:
#
#   deploy/build-client.sh <out dir> [<target>...]
#
# leaves <out dir>/knotless-<version>-<target>.tar.gz, each holding a
# directory of that name with the binaries, README and licences. The
# version is the workspace's, in Cargo.toml. With no target named, it
# empties <out dir> and builds them all; with some, it builds only those,
# replacing their archives and leaving the rest, so a workflow can build
# each in a step of its own, each within the runner's step timeout.
#
# On a Mac, both macOS targets build natively; every other target builds
# with cargo-zigbuild (`brew install zig`, `cargo install cargo-zigbuild`),
# on Linux all four, macOS included: the client links no macOS framework.
# TOOLCHAIN is rustup's toolchain to build with (stable; empty for the
# default, as in a rust image), and CARGO the cargo to run (its).

set -euo pipefail
cd "$(dirname "$0")/.."

OUT="${1:?usage: deploy/build-client.sh <out dir> [<target>...]}"
shift
TOOLCHAIN="${TOOLCHAIN-stable}"
CARGO="${CARGO:-${TOOLCHAIN:+rustup run $TOOLCHAIN }cargo}"
VERSION="$(sed -n 's/^version = "\(.*\)"/\1/p' Cargo.toml | head -1)"
ALL=(aarch64-apple-darwin x86_64-apple-darwin x86_64-unknown-linux-musl aarch64-unknown-linux-musl)
if [ $# -gt 0 ]; then
  TARGETS=("$@")
  for target in "${TARGETS[@]}"; do
    [[ " ${ALL[*]} " == *" $target "* ]] || { echo "not a target the install script fetches: $target" >&2; exit 2; }
  done
else
  TARGETS=("${ALL[@]}")
  rm -rf "$OUT"
fi

$CARGO zigbuild --help >/dev/null 2>&1 \
  || { echo "needs cargo-zigbuild: cargo install cargo-zigbuild, and zig" >&2; exit 1; }
rustup target add ${TOOLCHAIN:+--toolchain "$TOOLCHAIN"} "${TARGETS[@]}" >/dev/null

mkdir -p "$OUT"
for target in "${TARGETS[@]}"; do
  echo "→ building $VERSION for $target"
  case "$(uname -s) $target" in
    "Darwin "*-apple-darwin) build=build ;;
    *) build=zigbuild ;;
  esac
  $CARGO $build --release --locked --target "$target" -p knotless -p knotless-mcp -p knotless-run -p knotless-triage -p knotless-agent
  name="knotless-$VERSION-$target"
  rm -rf "$OUT/$name" "$OUT/$name.tar.gz"
  mkdir "$OUT/$name"
  for bin in knotless git-remote-knotless knotless-mcp knotless-run knotless-triage knotless-agent; do
    cp "target/$target/release/$bin" "$OUT/$name/"
  done
  install -m 755 crates/knotless-agent/claude-review "$OUT/$name/knotless-claude-review"
  cp README.md LICENSE-MIT LICENSE-APACHE "$OUT/$name/"
  tar -czf "$OUT/$name.tar.gz" -C "$OUT" "$name"
  rm -r "$OUT/$name"
done