latest github tags

__shell_invocation

# for latest 0.x releases

$ for i in 2 3 4 5; do github-gql ~/tags.gql v0.$i. kubesvc-plugin | jq -r 'try(.repository.refs.edges[].node.name)'; done
#> v0.2.3
#> v0.3.13
#> v0.4.8
#> v0.5.0-rc.14

github-gql

#!/usr/bin/env bash

[ -n "${GITHUB_API_TOKEN_PATH:-}"  ] || GITHUB_API_TOKEN_PATH="$HOME/.config/token/github"
[ -n "${GITHUB_API_URL:-}"         ] || GITHUB_API_URL='https://api.github.com/graphql'

main() {
  local input
  local auth_header

  input="${1?}"
  if ! test -s "$input"; then
    echo "$0: $input not found" >/dev/stderr
    return 1
  fi
  versionPrefix="${2:?Version prefix missing e.g. v0.5.}"
  repo="${3:?Repo missing. e.g. kubesvc-plugin}"
  owner="${4:-armory-io}"

  auth_header="$(auth_header)"
  : "${auth_header:? Missing auth header}"

  jq -nRs '.query=input | .variables={$versionPrefix,$repo}' "$input" --arg versionPrefix "$versionPrefix" --arg repo "$repo" |
    curl -sSf "$GITHUB_API_URL" -d '@-' -H "$auth_header"  |
    jq .data
}

auth_header() {
  if [[ -n "${GITHUB_API_TOKEN:-}" ]]; then
    echo "Authorization: bearer $GITHUB_API_TOKEN"
    return
  fi
  if [[ -s "$GITHUB_API_TOKEN_PATH" ]]; then
    echo "Authorization: bearer $(cat "$GITHUB_API_TOKEN_PATH")"
    return
  fi
  return 1
}

if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
  set -ueo pipefail
  main "$@"
fi

tags.gql

query($repo: String!, $versionPrefix: String!)
{
  repository(owner: "armory-io", name: $repo) {
    refs(first: 1, query: $versionPrefix, refPrefix: "refs/tags/", orderBy: {field: ALPHABETICAL, direction: DESC}) {
      edges {
        node {
          name
        }
      }
    }
  }
}