dl-urbit

#!/bin/bash
set -ex
DEVICE_ARCH=$(uname -m)

if [[ $DEVICE_ARCH == "aarch64" ]]; then
  ASSET_NAME="linux-aarch64.tgz"
elif [[ $DEVICE_ARCH == "x86_64" ]]; then
  ASSET_NAME="linux-x86_64.tgz"
fi

RELEASES=$(curl -sL https://api.github.com/repos/urbit/vere/releases)

if [[ "${TAG}" != "" ]]; then
  CURRENT_VERSION="${TAG}"
  PREV_VERSION=$(echo "$RELEASES" | jq -r ".[] | select(.tag_name == \"vere-${TAG}\") | .tag_name" | head -1)
  if [[ -z "$PREV_VERSION" ]]; then
    echo "Tag ${TAG} not found"
    exit 1
  fi
  IDX=$(echo "$RELEASES" | jq -r "to_entries[] | select(.value.tag_name == \"vere-${TAG}\") | .key")
  PREV_VERSION=$(echo "$RELEASES" | jq -r ".[$(($IDX + 1))].tag_name" | sed 's/^vere-//')
  CURRENT_VERSION=$(echo "${TAG}" | sed 's/^vere-//')
else
  CURRENT_VERSION=$(echo "$RELEASES" | jq -r '.[0].tag_name' | sed 's/^vere-//')
  PREV_VERSION=$(echo "$RELEASES" | jq -r '.[1].tag_name' | sed 's/^vere-//')
fi

CURRENT_URL=$(echo "$RELEASES" | jq -r ".[] | select(.tag_name == \"vere-${CURRENT_VERSION}\") | .assets[] | select(.name == \"${ASSET_NAME}\") | .browser_download_url")
PREV_URL=$(echo "$RELEASES" | jq -r ".[] | select(.tag_name == \"vere-${PREV_VERSION}\") | .assets[] | select(.name == \"${ASSET_NAME}\") | .browser_download_url")

mkdir -p /urbit/binary
cd /urbit/binary/

curl -L "$CURRENT_URL" | tar xzk
chmod +x /urbit/binary/vere-${CURRENT_VERSION}-linux-${DEVICE_ARCH}
mv /urbit/binary/vere-${CURRENT_VERSION}-linux-${DEVICE_ARCH} /usr/sbin/urbit

curl -L "$PREV_URL" | tar xzk
chmod +x /urbit/binary/vere-${PREV_VERSION}-linux-${DEVICE_ARCH}
mv /urbit/binary/vere-${PREV_VERSION}-linux-${DEVICE_ARCH} /usr/sbin/prev-urbit