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}"
    )
}

download() {
    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
}

delete() {
    (
        cd ${SRC}
        for b in $(ls ${SRC}/); do
            echo "Deleting $b ... "
            rm -r $b
        done
    )
}


# Run!
if [ $# != 1 ]; then
  echo "Download source packages for local testing by reading the links "
  echo "commented out in the packages/PACKAGE/spec files"
  echo
  echo "Usage: $(basename $0) download|delete"
  exit 1
fi

mkdir -p $SRC

case "$1" in
  download)
    download
  ;;
  delete)
    delete
  ;;
  *)
    echo "Usage: $(basename $0) download|delete"
    exit 1
  ;;
esac