STATIC_BUILDING.md

Building Statically

    docker pull golang:alpine # latest go env for building golang projects

    docker run -it --name build_static_fetch --rm \
      -e GIT_REF=v0.1.1 \
      -e GIT_URL=https://github.com/opsgang/fetch \
        golang:alpine /bin/sh
    
    # ... inside container
    export GOPATH=/go GOBIN=/usr/local/go/bin
    export LGOBIN=$GOBIN PATH=$PATH:$GOBIN
    apk --no-cache --update add ca-certificates bash gcc musl-dev openssl git curl

    echo "... getting glide (dependency manager)"
    curl https://glide.sh/get | sh || exit 1

    cd /go/src || exit 1
    git clone $GIT_URL --depth 1 --branch $GIT_REF || exit 1

    cd fetch || exit 1
    echo "... installing project deps (using glide)"
    glide install || exit 1

    echo "... building static binary $GOBIN/fetch"
    go build \
      --ldflags "-linkmode external -extldflags \"-static\" -X main.VERSION=$GIT_REF" \
      -o $GOBIN/fetch \
      . \
    || exit 1

    echo "... basic verification that binary works"
    fetch --help || exit 1
    fetch --version | grep -Po "$GIT_REF$" >/dev/null || exit 1