#!/bin/sh
 set -eux
 
 # Set defaults
 MBEDTLS_VERSION="${MBEDTLS_VERSION:-2.2.1}"
 OPENSSL_VERSION="${OPENSSL_VERION:-1.0.2h}"
 PREFIX="${PREFIX:-${HOME}/opt}"
 
 download_mbedtls () {
     if [ ! -f "download-cache/mbedtls-${MBEDTLS_VERSION}-apache.tgz" ]; then
         wget -P download-cache/ \
             "https://tls.mbed.org/download/mbedtls-${MBEDTLS_VERSION}-apache.tgz"
     fi
 }
 
 build_mbedtls () {
     if [ "$(cat ${PREFIX}/.mbedtls-version)" != "${MBEDTLS_VERSION}" ]; then
         tar zxf download-cache/mbedtls-${MBEDTLS_VERSION}-apache.tgz
         (
             cd "mbedtls-${MBEDTLS_VERSION}"
             make
             make install DESTDIR="${PREFIX}"
         )
         echo "${MBEDTLS_VERSION}" > "${PREFIX}/.mbedtls-version"
     fi
 }
 
 download_openssl () {
     if [ ! -f "download-cache/openssl-${OPENSSL_VERSION}.tar.gz" ]; then
         wget -P download-cache/ \
             "https://www.openssl.org/source/openssl-${OPENSSL_VERSION}.tar.gz"
     fi
 }
 
 build_openssl_linux () {
     tar zxf "download-cache/openssl-${OPENSSL_VERSION}.tar.gz"
     (
         cd "openssl-${OPENSSL_VERSION}/"
         ./config shared --openssldir="${PREFIX}" -DPURIFY
         make all install_sw
     )
 }
 
 build_openssl_osx () {
     tar zxf "download-cache/openssl-${OPENSSL_VERSION}.tar.gz"
     (
         cd "openssl-${OPENSSL_VERSION}/"
         ./Configure darwin64-x86_64-cc shared \
             --openssldir="${PREFIX}" -DPURIFY
         make depend all install_sw
     )
 }
 
 build_openssl () {
     if [ "$(cat ${PREFIX}/.openssl-version)" != "${OPENSSL_VERSION}" ]; then
         if [ "${TRAVIS_OS_NAME}" = "osx" ]; then
             build_openssl_osx
         elif [ "${TRAVIS_OS_NAME}" = "linux" ]; then
             build_openssl_linux
         fi
         echo "${OPENSSL_VERSION}" > "${PREFIX}/.openssl-version"
     fi
 }
 
 # Enable ccache
 if [ "${TRAVIS_OS_NAME}" != "osx" ]; then
     # ccache not available on osx, see:
     # https://github.com/travis-ci/travis-ci/issues/5567
     mkdir -p "${HOME}/bin"
     ln -s "$(which ccache)" "${HOME}/bin/${CC}"
     PATH="${HOME}/bin:${PATH}"
 fi
 
 # Download and build crypto lib
 mkdir -p download-cache
 if [ "${SSLLIB}" = "openssl" ]; then
     download_openssl
     build_openssl
 elif [ "${SSLLIB}" = "mbedtls" ]; then
     download_mbedtls
     build_mbedtls
 else
     echo "Invalid crypto lib: ${SSLLIB}"
     exit 1
 fi