niv add hackage

niv-add-hackage.sh

#!/usr/bin/env bash

_find_latest_package_version() {
  _url="https://hackage.haskell.org/package/${1}"

  curl -sH "Accept: application/json" "${_url}" |
    jq -r ". | (keys[] | [.]) | @csv" |
    sed "s/\"//g" |
    sort -t. -k1,1n -k2,2n -k3,3n -k4,4n |
    tail -n1
}

_find_package_description() {
  _name="${1}"
  _version="${2}"
  _url="https://hackage.haskell.org/package/${_name}-${_version}"

  curl -sH "Accept: application/json" "${_url}"
}

_niv_add() {
  _name="${1}"
  _version="$(_find_latest_package_version "${_name}")"
  _json="$(_find_package_description "${_name}" "${_version}")"
  _author="$(echo "${_json}" | jq -r ".author")"
  _copyright="$(echo "${_json}" | jq -r ".copyright")"
  _description="$(echo "${_json}" | jq ".description")"
  _homepage="$(echo "${_json}" | jq -r ".homepage")"
  _license="$(echo "${_json}" | jq -r ".license")"
  _synopsis="$(echo "${_json}" | jq -r ".synopsis")"
  _uploaded_at="$(echo "${_json}" | jq -r ".uploaded_at")"

  niv add \
    --template "https://hackage.haskell.org/package/<name>-<version>.tar.gz" \
    --attribute name="${_name}" \
    --attribute author="${_author}" \
    --attribute copyright="${_copyright}" \
    --attribute description=${_description} \
    --attribute homepage="${_homepage}" \
    --attribute license="${_license}" \
    --attribute synopsis="${_synopsis}" \
    --attribute uploaded_at="${_uploaded_at}" \
    --version "${_version}" "${_name}"
}

_niv_add "${1}"