bootstrap.sh

bootstrap.sh

#!/bin/bash
# This script aims to build a bootstrap CMake + gRPC environment for
# your project! It tries and saves space for the build - shallow cloning
# by default. Post build it'll take 1.5 GBs total, 340 MBs for just the
# final binaries needed for your project.
# 

# magical bash snip @ https://stackoverflow.com/a/246128
SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )"
becho() { echo -e "\e[1m$@\e[0m"; }

# Settings
# ---------
# BOOTSTRAP_DIR - where to install this bootstrap environment
#     default: <directory where this script is located>/bootstrap
BOOTSTRAP_DIR="$SCRIPT_DIR/bootstrap"

# PARALLEL_GRPC_CPUS - how many CPUs to build gRPC with
#     leave empty to unbound the number of parallel processes make can
#     run at the same time (dangerous - will run out of memory)
#     default: 2 CPUs
PARALLEL_GRPC_CPUS=2

mkdir -p $BOOTSTRAP_DIR $BOOTSTRAP_DIR/pkgs $BOOTSTRAP_DIR/prefix

becho " * writing env script..."
echo 'export PATH="'"$BOOTSTRAP_DIR"'/prefix/bin:$PATH"' > $BOOTSTRAP_DIR/env.sh
echo 'export LD_LIBRARY_PATH="'"$BOOTSTRAP_DIR"'/bootstrap/prefix/lib:$LD_LIBRARY_PATH"' >> $BOOTSTRAP_DIR/env.sh
echo 'echo "environment loaded"' >> $BOOTSTRAP_DIR/env.sh

chmod +x $BOOTSTRAP_DIR/env.sh

becho " * loading env script..."
source $BOOTSTRAP_DIR/env.sh

becho " * installing cmake..."
wget -q -O $BOOTSTRAP_DIR/pkgs/cmake-linux.sh https://github.com/Kitware/CMake/releases/download/v3.19.6/cmake-3.19.6-Linux-x86_64.sh
sh $BOOTSTRAP_DIR/pkgs/cmake-linux.sh -- --skip-license --prefix=$BOOTSTRAP_DIR/prefix

becho " * ensuring we have the correct cmake..."
cmake_loc=$(which cmake)

if [ ! "$cmake_loc" = "$BOOTSTRAP_DIR/prefix/bin/cmake" ]; then
    becho " * failed to setup cmake in bootstrap prefix... got $cmake_loc"
    exit 1
fi

becho " * installing required build deps..."
distro=$(lsb_release -i | cut -f2)
if [ "$distro" = "Ubuntu" ] || [ "$distro" = "Debian" ]; then
    sudo apt install -y build-essential autoconf libtool pkg-config
else
    echo "You will need basic build tools (make, gcc, etc.), autoconf, libtool,"
    echo "pkg-config, and git (>=2.9.0) installed."
    echo "Press ENTER if you have those installed already. Otherwise, CTRL-C to exit."
    read
fi

becho " * downloading grpc from git..."
pushd $BOOTSTRAP_DIR/pkgs
git clone --recurse-submodules -b v1.35.0 --single-branch --depth 1 --shallow-submodules https://github.com/grpc/grpc

becho " * building grpc..."
pushd grpc
mkdir -p cmake/build

pushd cmake/build
cmake -DgRPC_INSTALL=ON \
      -DgRPC_BUILD_TESTS=OFF \
      -DCMAKE_INSTALL_PREFIX=$BOOTSTRAP_DIR/prefix \
      ../..
make -j $PARALLEL_GRPC_CPUS
make install
popd # Leaving: cmake/build

becho " * building grpc examples"
pushd examples/cpp/helloworld
mkdir -p cmake/build

pushd cmake/build
cmake -DCMAKE_PREFIX_PATH=$BOOTSTRAP_DIR/prefix ../..
make -j $PARALLEL_GRPC_CPUS
popd # Leaving: cmake/build

popd # Leaving: grpc

popd # Leaving: $BOOTSTRAP_DIR/pkgs

becho " * done - to use this environment, run: source $BOOTSTRAP_DIR/env.sh"
becho " * build artifacts are available in $BOOTSTRAP_DIR/pkgs - this can be removed as needed"