#!/usr/bin/env bash
# Installs the pinned Odin release matching the runner's native architecture.
# The Odin release tarballs are named odin-linux-{amd64,arm64}-<version>.tar.gz;
# on an arm64 runner the amd64 Odin binary only runs under emulation and emits
# amd64 objects, which a natively-installed clang/ld cannot link ("Relocations
# in generic ELF (EM: 62)").
set -euo pipefail

VERSION="${ODIN_VERSION:-dev-2026-07}"

ARCH="$(uname -m)"
case "$ARCH" in
  x86_64 | amd64) OBJ_ARCH="amd64" ;;
  aarch64 | arm64) OBJ_ARCH="arm64" ;;
  *)
    echo "Unsupported runner architecture: $ARCH" >&2
    exit 1
    ;;
esac

curl -fL -o /tmp/odin.tar.gz \
  "https://github.com/odin-lang/Odin/releases/download/${VERSION}/odin-linux-${OBJ_ARCH}-${VERSION}.tar.gz"
mkdir -p /tmp/odin
tar -xzf /tmp/odin.tar.gz -C /tmp/odin --strip-components=1

# Work around an Odin binding bug: for ODIN_ARCH == .arm64 the vendored
# raylib references `vendor/raylib/linux-arm/libraylib.a`, but the release
# tarball ships it under `linux-arm64/` (see vendor/raylib/raylib.odin).
if [ "${OBJ_ARCH}" = "arm64" ] \
  && [ -d /tmp/odin/vendor/raylib/linux-arm64 ] \
  && [ ! -e /tmp/odin/vendor/raylib/linux-arm ]; then
  ln -s linux-arm64 /tmp/odin/vendor/raylib/linux-arm
fi

if [ -n "${GITHUB_PATH:-}" ]; then
  echo "/tmp/odin" >> "$GITHUB_PATH"
fi

echo "Installed Odin ${VERSION} (host arch: ${ARCH}, release arch: ${OBJ_ARCH})"