Add Ubuntu Azure Pipelines jobs. Add some caching.

.azure-pipelines/macos_clone_vcpkg.sh

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+#!/usr/bin/env bash
+
+vcpkg_base_dir=$1
+vcpkg_tag=$2
+
+cd ${vcpkg_base_dir}
+git clone https://github.com/Microsoft/vcpkg.git
+git -C ${vcpkg_base_dir}/vcpkg checkout ${vcpkg_tag}

.azure-pipelines/macos_install_vcpkg_deps.sh

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+#!/usr/bin/env bash
+
+vcpkg_base_dir=$1
+shift
+vcpkg_libraries=$@
+
+echo "vcpkg_base_dir=${vcpkg_base_dir}"
+echo "vcpkg_libraries=${vcpkg_libraries}"
+
+export BOOST_MODULAR_CMAKE="${vcpkg_base_dir}/vcpkg/ports/boost-modular-build-helper/CMakeLists.txt"
+export LN=$(grep -n "WORKING_DIRECTORY" ${BOOST_MODULAR_CMAKE} | awk -F ":" '{print $1}')
+gsed -i "${LN}i\        cxxstd=17" ${BOOST_MODULAR_CMAKE}
+
+${vcpkg_base_dir}/vcpkg/bootstrap-vcpkg.sh
+${vcpkg_base_dir}/vcpkg/vcpkg install ${vcpkg_libraries}
+rm -rf ${vcpkg_base_dir}/vcpkg/buildtrees
+rm -rf ${vcpkg_base_dir}/vcpkg/downloads
+rm -rf ${vcpkg_base_dir}/vcpkg/packages

.azure-pipelines/ubuntu-18.04_build_project.sh

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+#!/usr/bin/env bash
+
+set -e
+selene_dir=$(pwd)
+
+echo "--------------------------------------------------"
+echo "COMMIT $(git rev-parse HEAD)"
+echo "--------------------------------------------------"
+echo "CC = ${CC}"
+echo "CXX = ${CXX}"
+echo "CXXFLAGS = ${CXXFLAGS}"
+echo "LDFLAGS = ${LDFLAGS}"
+echo ""
+echo "VCPKG_DIR = ${VCPKG_DIR}"
+echo "BUILD_TYPE = " ${BUILD_TYPE}
+echo "ASAN = ${ASAN}"
+echo "--------------------------------------------------"
+cmake --version;
+echo "--------------------------------------------------"
+${CC} --version;
+echo "--------------------------------------------------"
+${CXX} --version;
+echo "--------------------------------------------------"
+
+local_build_benchmarks="-DSELENE_BUILD_BENCHMARKS=OFF"
+
+if [[ -n "${VCPKG_DIR}" ]]; then
+  echo "Building using vcpkg..."
+  local_vcpkg_toolchain="-DCMAKE_TOOLCHAIN_FILE=${VCPKG_DIR}/scripts/buildsystems/vcpkg.cmake"
+  full_vcpkg_dir=${VCPKG_DIR}
+  local_build_benchmarks="-DSELENE_BUILD_BENCHMARKS=ON"
+fi
+
+if [[ -n "${BUILD_TYPE}" ]]; then
+  echo "Build type: ${BUILD_TYPE}"
+  local_build_type="-DCMAKE_BUILD_TYPE=${BUILD_TYPE}"
+fi
+
+if [[ -n "${ASAN}" ]]; then
+  echo "Building with AddressSanitizer enabled..."
+  local_enable_sanitizers="-DSELENE_ENABLE_SANITIZERS=ON"
+fi
+
+# CMake invocation
+rm -rf build && mkdir -p build && cd build
+cmake -G Ninja \
+  ${local_vcpkg_toolchain} \
+  ${local_build_type} \
+  ${local_enable_sanitizers} \
+  -DSELENE_BUILD_TESTS=ON \
+  -DSELENE_BUILD_EXAMPLES=ON \
+  ${local_build_benchmarks} \
+  -DSELENE_WARNINGS_AS_ERRORS=ON \
+  ..
+
+echo "--------------------------------------------------"
+echo "Build all targets..."
+
+cmake --build . -j
+export SELENE_DATA_PATH=${selene_dir}/data
+
+echo "--------------------------------------------------"
+echo "Run tests..."
+
+./test/selene_tests -d yes
+
+echo "--------------------------------------------------"
+echo "Run all example binaries..."
+
+# Run all example binaries
+# https://stackoverflow.com/questions/4458120/unix-find-search-for-executable-files
+example_binaries=$(find -L ./examples/ -maxdepth 1 -type f \( -perm -u=x -o -perm -g=x -o -perm -o=x \))
+for file in ${example_binaries}
+do
+  echo "EXECUTING ${file}..."
+  ${file}
+done
+
+echo "--------------------------------------------------"
+
+if [[ -n "${VCPKG_DIR}" ]]; then
+    echo "Build an example project using a vcpkg-installed version of Selene..."
+    echo "- Copying portfiles"
+    cp ${selene_dir}/package/vcpkg/* ${full_vcpkg_dir}/ports/selene
+
+    echo "- Removing selene (shouldn't exist)"
+    ${full_vcpkg_dir}/vcpkg remove selene
+    echo "- Installing selene from HEAD"
+    ${full_vcpkg_dir}/vcpkg install --head selene
+
+    echo "- Invoking CMake on test project"
+    cd ${selene_dir}/package/test_vcpkg
+    rm -rf build && mkdir -p build && cd build
+    cmake -G Ninja ${local_vcpkg_toolchain} ..
+
+    echo "- Building test project"
+    cmake --build . -j
+
+    echo "- Running test project"
+    ./example
+fi
+
+echo "--------------------------------------------------"
+
+echo "FINISHED."

.azure-pipelines/ubuntu-18.04_clone_vcpkg.sh

@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+
+vcpkg_base_dir=$1
+vcpkg_tag=$2
+
+cd ${vcpkg_base_dir}
+git clone https://github.com/Microsoft/vcpkg.git
+git -C ${vcpkg_base_dir}/vcpkg checkout ${vcpkg_tag}

.azure-pipelines/ubuntu-18.04_install_vcpkg_deps.sh

@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+
+vcpkg_base_dir=$1
+shift
+vcpkg_libraries=$@
+
+echo "vcpkg_base_dir=${vcpkg_base_dir}"
+echo "vcpkg_libraries=${vcpkg_libraries}"
+echo "CC=${CC}"
+echo "CXX=${CXX}"
+echo "CXXFLAGS=${CXXFLAGS}"
+echo "LDFLAGS=${LDFLAGS}"
+
+CC=gcc-8 CXX=g++-8 CXXFLAGS="" LDFLAGS="" ${vcpkg_base_dir}/vcpkg/bootstrap-vcpkg.sh
+${vcpkg_base_dir}/vcpkg/vcpkg install ${vcpkg_libraries}
+rm -rf ${vcpkg_base_dir}/vcpkg/buildtrees
+rm -rf ${vcpkg_base_dir}/vcpkg/downloads
+rm -rf ${vcpkg_base_dir}/vcpkg/packages