earthlyw

#!/bin/bash

CACHE_DIR="${XDG_CACHE_HOME:-$HOME/.cache}/earthlyw/latest/"

# Check age of cache, if older than 1 month, remove it
if [[ $(find "${CACHE_DIR}" -type f -mtime +30 | wc -l) -gt 0 ]]; then
  rm -rf "${CACHE_DIR}"
fi
mkdir -p "${CACHE_DIR}"

# Figure out which architecture to download for, amd64 or arm64
ARCH=$(uname -m)
if [[ "${ARCH}" == "x86_64" ]]; then
  ARCH="amd64"
elif [[ "${ARCH}" == "aarch64" ]]; then
  ARCH="arm64"
fi

# Figure out OS we are running on
OS=$(uname -s | tr '[:upper:]' '[:lower:]')

EXT=""
if [[ "${OS}" == "windows" ]]; then
  EXT=.exe
fi

# Determine executable name
EXECUTABLE_NAME="earthly-${OS}-${ARCH}${EXT}"
EXECUTABLE="${CACHE_DIR}/${EXECUTABLE_NAME}"

# If executable does not exist, fetch it
if [[ ! -x "${EXECUTABLE}" ]]; then
  echo "Cache is older than 1 month, fetching latest version" >&2

  # Fetch latest release information
  DATA_FILE=$(mktemp --suffix=.json)
  curl -s https://api.github.com/repos/earthly/earthly/releases/latest > "${DATA_FILE}"

  # Find download URL for executable
  DOWNLOAD_URL=$(jq -r ".assets[] | select(.name == \"${EXECUTABLE_NAME}\") | .browser_download_url" "${DATA_FILE}")

  if [[ -z "${DOWNLOAD_URL}" ]]; then
    echo "Failed to find download URL for ${EXECUTABLE_NAME}" >&2
    exit 1
  fi

  # Download binary to user cache directory
  curl -sL "${DOWNLOAD_URL}" -o "${EXECUTABLE}"
  chmod a+x "${EXECUTABLE}"
fi

# Run  binary with all arguments
"${EXECUTABLE}" "$@"