build-native.sh

#!/usr/bin/env bash

# Build a single native benchmark.
#
# Usage: ./build-native.sh [--host] <path to benchmark directory>

set -e

BENCHMARKS_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
SIGHTGLASS_BASE=$(dirname $BENCHMARKS_DIR)
ENGINE=$SIGHTGLASS_BASE/engines/native/libengine.so
BENCHMARK_DIR=$1;

print_header() {
    >&2 echo
    >&2 echo ===== $@ =====
}

if [[ ! -d $BENCHMARK_DIR ]]; then
    echo "Unknown benchmark directory; usage: ./build-native.sh [--host] <path to benchmark directory>"
    exit 1
fi

# Build engine if not availble since it needs to be present for linking.
if [[ ! -f $ENGINE ]]; then
    cd $SIGHTGLASS_BASE/engines/native/libengine/
    cargo build --release
    cp target/release/libnative_bench_api.so ../libengine.so
    cd - > /dev/null
fi

# Build directly on host
FLAG='--host'
if [[ $* == *$FLAG* ]]; then
    print_header "Build native benchmark directly on host (no Docker)"
    (set -x; cd $BENCHMARK_DIR && ./build-native.sh)
else
    BENCHMARK_NAME=$(readlink -f $BENCHMARK_DIR | xargs basename)
    IMAGE_NAME=sightglass-benchmark-$BENCHMARK_NAME-native

    # To allow the use of symlinks in the benchmark directories (docker ignores
    # them), we `tar` up the directory and `--dereference` (i.e., follow) all
    # symlinks provided.
    print_header "Create build context"
    TMP_TAR=$(mktemp /tmp/sightglass-benchmark-dir-XXXXXX.tar)
    (set -x; cd $BENCHMARK_DIR && \
        ln -f -s $ENGINE ./libengine.so && \
        tar --create --file $TMP_TAR --dereference --verbose . && \
        rm libengine.so)

    # Build the benchmark and extract the build results from the container.
    print_header "Build native benchmark in Docker"
    (set -x; docker build -f Dockerfile.native --tag $IMAGE_NAME - < $TMP_TAR)
    CONTAINER_ID=$(set -x; docker create $IMAGE_NAME)
    (set -x; docker cp --follow-link $CONTAINER_ID:/benchmark/. $BENCHMARK_DIR/;)
fi