#!/usr/bin/env bash
set -euo pipefail

ROOT_DIR="${ROOT_DIR:-/workspace}"
TOOLS_DIR="${ROOT_DIR}/.tools"
BIN_DIR="${TOOLS_DIR}/micromamba/bin"
MAMBA_BIN="${BIN_DIR}/micromamba"

download() {
  local url="$1"
  local output="$2"
  if curl -L "${url}" -o "${output}"; then
    return 0
  fi
  if curl -k -L "${url}" -o "${output}"; then
    return 0
  fi
  wget --no-check-certificate "${url}" -O "${output}"
}

mkdir -p "${BIN_DIR}"

if [[ -x "${MAMBA_BIN}" ]]; then
  echo "${MAMBA_BIN}"
  exit 0
fi

TMP_DIR="$(mktemp -d)"
trap 'rm -rf "${TMP_DIR}"' EXIT

download https://micro.mamba.pm/api/micromamba/linux-64/latest "${TMP_DIR}/micromamba.tar.bz2"
tar -xjf "${TMP_DIR}/micromamba.tar.bz2" -C "${TMP_DIR}"
cp "${TMP_DIR}/bin/micromamba" "${MAMBA_BIN}"
chmod +x "${MAMBA_BIN}"

echo "${MAMBA_BIN}"