#!/bin/sh
set -eu

VERSION="${1:?usage: build_jq.sh <version> [output_dir]}"
OUTPUT_DIR="${2:-$PWD/dist}"
VERSION="${VERSION#v}"
PREFIX_NAME="jq-${VERSION}-linux-amd64-musl-static"

mkdir -p "$OUTPUT_DIR"

apk add --no-cache \
  build-base \
  curl \
  file \
  tar \
  xz

SRCDIR="${TMPDIR:-/tmp}/jq-src-${VERSION}"
rm -rf "$SRCDIR"
mkdir -p "$SRCDIR"

curl -fsSL "https://github.com/jqlang/jq/releases/download/jq-${VERSION}/jq-${VERSION}.tar.gz" \
  | tar -xz -C "$SRCDIR" --strip-components=1

cd "$SRCDIR"
./configure \
  --disable-docs \
  --with-oniguruma=builtin \
  --enable-all-static \
  CFLAGS='-O2 -pipe'
make -j"$(getconf _NPROCESSORS_ONLN 2>/dev/null || echo 2)"
cp jq "$OUTPUT_DIR/$PREFIX_NAME"
strip "$OUTPUT_DIR/$PREFIX_NAME" 2>/dev/null || true

(
  cd "$OUTPUT_DIR"
  tar -czf "${PREFIX_NAME}.tar.gz" "$PREFIX_NAME"
  sha256sum "$PREFIX_NAME" "${PREFIX_NAME}.tar.gz" > "${PREFIX_NAME}.sha256"
)

file "$OUTPUT_DIR/$PREFIX_NAME"
ldd "$OUTPUT_DIR/$PREFIX_NAME" || true

if file "$OUTPUT_DIR/$PREFIX_NAME" | grep -qi 'dynamically linked'; then
  echo "error: output binary is still dynamically linked" >&2
  exit 1
fi

echo "build OK: $OUTPUT_DIR/$PREFIX_NAME"