#!/usr/bin/env bash
set -euo pipefail
root="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")/.." && pwd)"
target="${1:?Usage: build-linux.sh linux-aarch64|linux-armhf|linux-x86_64}"
case "$target" in linux-aarch64|linux-armhf|linux-x86_64) ;; *) echo "Unsupported target label" >&2; exit 2;; esac
sdk="${SDKDIR:-$root/sdk/ExtensionSDK}"
compiler="${CC:-gcc}"
for tool in "$compiler" make m4 dos2unix python3 file; do command -v "$tool" >/dev/null; done
sdk="$(realpath "$sdk")"
make -C "$root/component" SDKDIR="$sdk" CC="$compiler" clean
make -C "$root/component" SDKDIR="$sdk" CC="$compiler" all
binary="$root/component/out/libCmpAtomModbus.so"
identity="$(file -b "$binary")"
case "$target" in
 linux-aarch64) [[ "$identity" == *aarch64* ]] ;;
 linux-armhf) [[ "$identity" == *"ELF 32-bit"* && "$identity" == *ARM* ]] ;;
 linux-x86_64) [[ "$identity" == *x86-64* ]] ;;
esac || { echo "Binary architecture does not match $target: $identity" >&2; exit 3; }
destination="$root/dist/0.2.0/$target"
mkdir -p "$destination"
cp "$binary" "$destination/"
{
 date -u '+Build UTC: %Y-%m-%dT%H:%M:%SZ'
 uname -a
 "$compiler" --version
 file "$binary"
 if command -v getconf >/dev/null; then getconf GNU_LIBC_VERSION || true; fi
 if command -v git >/dev/null; then git -C "$root" rev-parse HEAD 2>/dev/null || true; fi
 printf 'SDK file hashes:\n'
 find "$sdk" -type f -exec sha256sum {} +
 printf 'Record tested runtime, target OS/libc and cross sysroot here before release.\n'
} > "$destination/build-info.txt"
sha256sum "$destination/libCmpAtomModbus.so" > "$destination/SHA256SUMS.txt"
printf 'Built: %s\n' "$destination/libCmpAtomModbus.so"