Bash script to find url of latest GitHub Releases.

github_latest.sh

#!/usr/bin/env bash

github_latest () {
  local usage="Usage: $(basename $0 | sed -E 's/\.sh//') [options] <owner> <repo>
  Options:
-l | --like    = Download release with name that contains string, e.g. amd64. *not a regex*"

  local url
  local dl_url
  local data
  local like
  

  if [[ "$#" -lt 2 ]]; then
    echo "$usage"
    exit 1
  fi

  while [[ "$#" -gt 2 ]]; do
    case "$1" in
      help|?|-h|--help)
        echo "$usage"
        exit
        ;;
      -l|--like)
        if [[ "$#" -ge 2 ]]; then
          like="$2"
          shift; shift
        else
          echo "$usage"
          exit 1
        fi
        ;;
      *)
        echo "$usage"
        exit 1
    esac
  done

  url="https://api.github.com/repos/$1/$2/releases/latest"

  data="$(curl -fsSL $url |
    grep "_url.*$1/$2.*\(/download/\|/tarball\|/zipball\)" |
    sed -E 's/.*\: "//' |
    tr -d '",'
  )"

  # echo "Data='
#$data
#'"

  if [[ "$like" != "" ]]; then
    dl_url="$(echo ${data} | tr ' ' '\n' | grep $like)"
  else
    dl_url="$(echo ${data} |
      grep -i "[$(uname)|$(arch)]" |
      sed -E 's/\ .*//')"

      if [[ "$dl_url" == "" ]]; then
        dl_url="$(echo ${data} |
        sed -E 's/\ .*//')"
      fi
  fi

  # echo "Download URL='
#$dl_url
#'"

  echo "$dl_url"
}

github_latest "$@"