update.sh

# remove old
rm -rf /opt/wcl/monitoring
mkdir -p /opt/wcl/monitoring
chmod 755 /opt/wcl

cd /opt/wcl/monitoring

# https://gist.github.com/maxim/6e15aa45ba010ab030c4
TOKEN=$1
VERSION=$2                       # tag name or the word "latest"
FILE=$3                          # the name of your release asset file, e.g. build.tar.gz
# TODO: check from different aspects
if [ -z "$1" ]; then
    echo "[E] Invalid TOKEN"
    exit 1
fi
if [ -z "$2" ]; then
    echo "[E] Invalid VERSION"
    exit 1
fi
if [ -z "$3" ]; then
    echo "[E] Invalid FILE"
    exit 1
fi
REPO="Wiredcraft/products"
GITHUB="https://api.github.com"

function gh_curl() {
  curl -H "Authorization: token $TOKEN" \
       -H "Accept: application/vnd.github.v3.raw" \
       $@
}

if [ "$VERSION" = "latest" ]; then
  # Github should return the latest release first.
  parser=".[0].assets | map(select(.name == \"$FILE\"))[0].id"
else
  parser=". | map(select(.tag_name == \"$VERSION\"))[0].assets | map(select(.name == \"$FILE\"))[0].id"
fi

CONTENT=`gh_curl -s $GITHUB/repos/$REPO/releases`
TYPE=`echo "$CONTENT" | jq 'type'`
if [ "$TYPE" = "object" ]; then
  MESSAGE=`echo "$CONTENT" | jq '.message'`
  echo "[E] curl github fail: $MESSAGE"
  exit 1
else
  # TYPE = "array"
  ASSET_ID=`echo "$CONTENT" | jq "$parser"`
  if [ "$ASSET_ID" = "null" ]; then
    echo "[E] version not found: $VERSION"
    exit 1
  fi
fi

wget -q --auth-no-challenge --header='Accept:application/octet-stream' \
  https://$TOKEN:@api.github.com/repos/$REPO/releases/assets/$ASSET_ID \
  -O $3

tar xzvf $3
chown -R wcladmin:wcladmin /opt/wcl