build.sh

#!/bin/sh
#set -x # uncomment this to have the shell output the commands before they are ran
set +e # do not exit on error, but permit script to control when to exit

if ! mkdir -p "tmp.dockerWorkArea"; then
    echo "ERROR: Unable to create 'tmp.dockerWorkArea' directory." >&2
    exit 1
fi

baseDir=$(pwd)

goPath=$(which go)
goPathCount=$(echo "$goPath" | grep . | wc -l)
if [ "$goPathCount" -eq 1 ]; then
    echo "# INFO: Found 'go' at '$goPath'"
    echo
else
    echo "ERROR: Unable to find the 'go' compiler." >&2
    exit 1
fi

if ! cd src; then
    echo "ERROR: Unable to cd into 'src'." >&2
    exit 1
fi

if ! CGO_ENABLED=0 go build -v -o ../tmp.dockerWorkArea/reaper; then
    echo "ERROR: Unable bo build the binary to 'tmp.dockerWorkArea/reaper'." >&2
    exit 1
fi

cd $baseDir

if ! docker build -f Dockerfile.deploy -t reaper:1 .; then
    echo "ERROR: Unable to build the docker image." >&2
    exit 1
fi

if ! docker image save reaper:1 -o tmp.dockerWorkArea/reaper-1.dockerImage.tar; then
    echo "ERROR: Unable save out the docker image." >&2
    exit 1
fi

# microk8s is micro kubernetes: https://microk8s.io/
if which microk8s.kubectl; then
    if ! microk8s.ctr image import tmp.dockerWorkArea/reaper-1.dockerImage.tar; then
        echo "ERROR: Unable to load the docker image into 'microk8s'." >&2
        exit 1
    fi

    if ! microk8s.ctr images ls|grep "SIZE\|reaper"; then
        echo "ERROR: Unable to load the docker image into 'microk8s'." >&2
        exit 1
    fi

    echo
    echo "# INFO: The image for reaper was successfully imported into 'microk8s' to create containers from."
    echo "# INFO: Now attempting to start reaper in 'microk8s'."
    echo

    # start/replace reaper in microk8s
    microk8s kubectl replace --force -f manifest.deploy.yaml

    # stop reaper in microk8s
    #microk8s kubectl delete -f manifest.deploy.yaml

elif which kind; then
    # kind is kubernetes in docker: https://kind.sigs.k8s.io/
    if ! kind load docker-image reaper:1; then
        echo "ERROR: Unable to load the docker image into 'kind'." >&2
        exit 1
    fi
    
    echo "# INFO: The image for reaper was successfully imported into 'kind' to create containers from."
    echo
else
    echo "ERROR: Unable to find 'microk8s' or 'kind' to load the image into." >&2
    exit 1
fi

echo
echo "# INFO: Deleting tmp.dockerWorkArea/ because we care."
rm -rf tmp.dockerWorkArea/

exit 0