hub api example of how to fetch all comments over GraphQL

hub-api-comments.sh

comments() {
  local issue="${1?}"
  shift 1
  paginate hub api --cache 3600 graphql -F issue="$issue" "$@" -f query='
    query ($owner: String = "{owner}", $repo: String = "{repo}", $issue: Int!, $per_page: Int = 30, $after: String) {
      repository(owner: $owner, name: $repo) {
        issueOrPullRequest(number: $issue) {
          ... on Issue {
            comments(first: $per_page, after: $after) {
              ...Comments
            }
          }
          ... on PullRequest {
            comments(first: $per_page, after: $after) {
              ...Comments
            }
          }
        }
      }
    }

    fragment Comments on IssueCommentConnection {
      edges {
        node {
          author {
            login
          }
          body
        }
      }
      pageInfo {
        hasNextPage
        endCursor
      }
    }
  '
}

# Automatically fetch all pages of the provided GraphQL query
paginate() {
  local output cursor
  output="$("$@")"
  if [[ $output == \{* ]]; then
    cursor="$(jq -r '..|.pageInfo?|select(.hasNextPage)|.endCursor' <<<"$output")"
  else
    cursor="$(awk '/\.hasNextPage/ { has_next=$2 } /\.endCursor/ { if (has_next=="true") print $2 }' <<<"$output")"
  fi
  printf "%s\n" "$output"
  [ -z "$cursor" ] || paginate "$@" -f after="$cursor"
}

# Example usage: fetch all comments for issue/PR #1705 of the current repository and output them as text
comments 1705 -F per_page=50 | \
  jq -r '.data.repository.issueOrPullRequest.comments.edges[].node | "@\(.author.login): \(.body)\n\n"'