#!/bin/bash
set -e

REPO=https://github.com/jthornber/thin-provisioning-tools.git
SRC=thin-provisioning-tools-${VERSION}

# Grab the latest available:
VERSION=$(git ls-remote --tags ${REPO} | grep -v '\^{}' | tail -n1 | sed 's#.*refs/tags/v##')
echo "Downloading version: ${VERSION}"

# Remove the existing sources:
rm -fv thin-provisioning-tools-*tar*

wget https://github.com/jthornber/thin-provisioning-tools/archive/refs/tags/v${VERSION}.tar.gz \
     -O ${SRC}.tar.gz
gunzip ${SRC}.tar.gz

# --- vendor the rust crates so the build can happen without Internet access ---
WORK=$(mktemp -d)
tar -xf ${SRC}.tar -C ${WORK}
TOPDIR=$(tar -tf ${SRC}.tar | head -n1 | cut -f1 -d/)

# Only vendor crates for the Linux targets we actually build for.
TARGETS=(
  aarch64-unknown-linux-gnu
  x86_64-unknown-linux-gnu
  i686-unknown-linux-gnu
  s390x-unknown-linux-gnu
)

(
  cd ${WORK}/${TOPDIR}
  mkdir -p .cargo
  PLATFORM_ARGS=()
  for t in "${TARGETS[@]}"; do
    PLATFORM_ARGS+=(--platform "$t")
  done
  if ! command -v cargo-vendor-filterer >/dev/null 2>&1; then
    echo "WARNING: cargo-vendor-filterer not found, creating unfiltered vendor tarball"
    cargo vendor vendor > .cargo/config.toml
  else
    cargo vendor-filterer "${PLATFORM_ARGS[@]}" vendor > .cargo/config.toml
  fi
)

# Pack:
tar -cf ${SRC}-vendor.tar -C ${WORK}/${TOPDIR} vendor .cargo
rm -rf ${WORK}

xz -ze9 ${SRC}.tar
xz -ze9 ${SRC}-vendor.tar

echo "Done:"
echo "  ${SRC}.tar.xz         (source)"
echo "  ${SRC}-vendor.tar.xz  (vendored crates, for offline cargo build)"