#!/bin/bash

set -o errexit -o nounset -o pipefail
set -o xtrace

# Calls CMake to generate build files and then run the build.
# Usage:
#   generate_and_build <output directory> [<other generate args> ...]
generate_and_build() {
  local folder_name=$1
  shift

  mkdir "${folder_name}"
  (cd "${folder_name}"; cmake "$@" ..)
  cmake --build "${folder_name}"
}

# Choose what to do based on OS and compiler.
case "${TRAVIS_OS_NAME}_${TRAVIS_COMPILER}" in
  linux_clang)
    sudo apt install "linux-headers-$(uname -r)"

    generate_and_build build
    ;;

  osx_clang)
    generate_and_build build
    ;;

  windows_*)
    generate_and_build build-x64 -A x64
    generate_and_build build-win32 -A Win32
    ;;

  linux_gcc)
    # Need this `apt update` for the install to succeed. Without it, the
    # Travis worker only has lists for the ${distro}-security repository.
    sudo apt update
    sudo apt install \
        "linux-headers-$(uname -r)" \
        g++-i686-linux-gnu \
        g++-aarch64-linux-gnu \
        g++-powerpc64le-linux-gnu

    generate_and_build build-x86_64

    generate_and_build build-i686 \
        -DCMAKE_TOOLCHAIN_FILE=ci/toolchains/i686-linux-gnu.cmake

    generate_and_build build-aarch64 \
        -DCMAKE_TOOLCHAIN_FILE=ci/toolchains/aarch64-linux-gnu.cmake

    generate_and_build build-powerpc64le \
        -DCMAKE_TOOLCHAIN_FILE=ci/toolchains/powerpc64le-linux-gnu.cmake
    ;;
esac