bosh_prepare

#!/usr/bin/env bash

SRC=$(pwd)/blobs
SHELL=/bin/bash
AWK=awk

read_spec() {
    local spec="$1"
    $AWK '/^files:/ {
        while (getline) {
            if ($1 == "-") {
                if ($3 ~ /#/) {
                    url=$3$4;
                    sub(/#/, "", url)
                    print $2"@"url;
                }
            } else {
                next;
            }
        }
    }' "$spec"
}

exec_download() {
    local output="$1"
    local url="$2"
    local package=$(dirname "${output}")
    local src=$(basename "${output}")
    (
        cd ${SRC}
        if [ ! -s "${output}" ]; then
            echo "  Downloading ${url} ..."
            mkdir -p "${package}"
            curl -L -s "${url}" -o "${output}"
        fi
    )
}

exec_prepare() {
    local prepare="$1"
    (
        cd ${SRC}
        ${SHELL} "${prepare}"
    )
}

main() {
    for script in $(pwd)/packages/*/spec ; do
        local base=$(dirname "${script}")
        local prepare="${base}/prepare"
        if [ -s "${prepare}" ]; then
            echo "* Procesing ${prepare} ..."
            exec_prepare "$prepare"
        else
            echo "* Procesing ${script} ..."
            for spec in $(read_spec "${script}"); do
                local downloadfile=$(echo $spec | cut -d'@' -f 1)
                local downloadurl=$(echo $spec | cut -d'@' -f 2)
                exec_download "${downloadfile}" "${downloadurl}"
            done
        fi
    done
}

# Run!
mkdir -p $SRC
main