#!/usr/bin/env bash
# Build the runner, `flow`, for every Linux machine a runner runs on
# (glibc 2.28 and later), as release assets runners update themselves from
# (docs/jetstream.md §8.2, oxygenhub#322): target/dist-flat/flow-linux-ARCH,
# named by the architecture a runner reports (x86_64, aarch64, riscv64),
# plain stripped binaries, and SHA256SUMS of them.
#
#   scripts/dist.sh [VERSION]    (default: the package version)
#   ONLY=x86_64 scripts/dist.sh  builds one architecture (a glob)
#
# Needs: rustup targets aarch64-unknown-linux-gnu and
# riscv64gc-unknown-linux-gnu; cargo-zigbuild and zig on PATH.
set -euo pipefail

cd "$(dirname "$0")/.."
VERSION="${1:-$(cargo pkgid -p flow | sed 's/.*[#@]//')}"
VERSION="${VERSION#v}"
OUT="${DIST_FLAT:-target/dist-flat}"
rm -rf "$OUT" && mkdir -p "$OUT"
export PATH="$HOME/.local/opt/zig:$PATH"
# Stripped, with no debug info: about a tenth of the size.
export CARGO_PROFILE_RELEASE_DEBUG=0 CARGO_PROFILE_RELEASE_STRIP=true CARGO_INCREMENTAL=0
# The version the binary reports, which the hub compares with its releases.
export OXY_BUILD="v$VERSION"

for p in "x86_64-unknown-linux-gnu|x86_64" "aarch64-unknown-linux-gnu|aarch64" "riscv64gc-unknown-linux-gnu|riscv64"; do
  IFS='|' read -r triple arch <<<"$p"
  if [ -n "${ONLY:-}" ] && [[ "$arch" != $ONLY ]]; then continue; fi
  echo "== linux-$arch ($triple)"
  cargo zigbuild -q --release --locked --target "$triple.2.28" -p flow --bin flow
  install -m 0755 "target/$triple/release/flow" "$OUT/flow-linux-$arch"
done
(cd "$OUT" && sha256sum flow-linux-* > SHA256SUMS && cat SHA256SUMS)