#!/usr/bin/env bash
# Generate the Boost CMake config files OSRM's find_package(Boost CONFIG)
# needs, pointing at a b2-built boost (headers in $P/include/boost,
# static libs in $P/lib). Boost release tarballs ship no CMake support,
# so we roll minimal configs: one per component + version + main.
#
#   W=/tmp/osm-build  bash install-boost-cmake.sh
set -euo pipefail
W="${W:-/tmp/osm-build}"
P="$W/prefix"
CM="$P/lib/cmake/Boost-1.84.0"
mkdir -p "$CM"

cat > "$CM/BoostConfigVersion.cmake" <<'EOF'
set(PACKAGE_VERSION "1.84.0")
if(PACKAGE_VERSION VERSION_LESS PACKAGE_FIND_VERSION)
  set(PACKAGE_VERSION_COMPATIBLE FALSE)
else()
  set(PACKAGE_VERSION_COMPATIBLE TRUE)
  if(PACKAGE_VERSION VERSION_EQUAL PACKAGE_FIND_VERSION)
    set(PACKAGE_VERSION_EXACT TRUE)
  endif()
endif()
EOF

# component: cmlist-name  b2-lib-name
for pair in "date_time date_time" "iostreams iostreams" \
            "program_options program_options" "thread thread" \
            "unit_test_framework test" "regex regex" "zlib zlib"; do
  comp=${pair% *}
  b2name=${pair#* }
  cap=$(echo "$comp" | tr 'a-z' 'A-Z')
  if [ "$comp" = "zlib" ]; then
    # OSRM lists Boost_ZLIB_LIBRARY in BOOST_ENGINE_LIBRARIES; use system zlib
    cat > "$CM/Boost${cap}Config.cmake" <<EOF
set(Boost_${cap}_LIBRARY /usr/lib/x86_64-linux-gnu/libz.so)
set(Boost_${cap}_FOUND TRUE)
set(Boost_${comp}_FOUND TRUE)
EOF
    continue
  fi
  lib=$(ls "$P"/lib/libboost_${b2name}*.a 2>/dev/null | head -1 || true)
  if [ -z "$lib" ]; then
    echo "FATAL: no static lib for $comp (b2name $b2name)" >&2
    exit 1
  fi
  cat > "$CM/Boost${cap}Config.cmake" <<EOF
set(Boost_${cap}_LIBRARY "$lib")
set(Boost_${cap}_FOUND TRUE)
set(Boost_${comp}_FOUND TRUE)
EOF
done

cat > "$CM/BoostConfig.cmake" <<EOF
if(Boost_FOUND)
  return()
endif()
set(Boost_VERSION 108400)
set(Boost_VERSION_STRING "1.84.0")
set(Boost_LIB_VERSION "1_84")
get_filename_component(Boost_INCLUDE_DIRS "$P/include" ABSOLUTE)
set(Boost_INCLUDE_DIR "\${Boost_INCLUDE_DIRS}")
set(Boost_LIBRARIES "")
foreach(_comp \${Boost_FIND_COMPONENTS})
  string(TOUPPER "\${_comp}" _uc)
  include("\${CMAKE_CURRENT_LIST_DIR}/Boost\${_uc}Config.cmake")
  list(APPEND Boost_LIBRARIES \${Boost_\${_uc}_LIBRARY})
endforeach()
set(Boost_FOUND TRUE)
EOF

ls "$CM"
echo "boost cmake config installed in $CM"