Function extractPullRequestNumber

main.go:1254–1295

(input string)

}

func extractPullRequestNumber(input string) (int, error) {
	candidate := strings.TrimSpace(input)
	candidate = strings.TrimSuffix(candidate, "/")
	if candidate == "" {
		return 0, fmt.Errorf("pull request reference cannot be empty")
	}

	if number, ok := parseNumericCandidate(candidate); ok {
		return number, nil
	}

	if strings.HasPrefix(candidate, "http://") || strings.HasPrefix(candidate, "https://") {
		u, err := url.Parse(candidate)
		if err == nil && u.Host != "" {
			segments := strings.Split(strings.Trim(u.Path, "/"), "/")
			for i := 0; i < len(segments); i++ {
				segment := segments[i]
				if segment == "pull" || segment == "pulls" {
					if i+1 < len(segments) {
						if number, ok := parseNumericCandidate(segments[i+1]); ok {
							return number, nil
						}
					}
				}
			}
		}
	}

	if idx := strings.LastIndex(candidate, "#"); idx >= 0 && idx+1 < len(candidate) {
		if number, ok := parseNumericCandidate(candidate[idx+1:]); ok {
			return number, nil
		}
	}

	if idx := strings.LastIndex(candidate, "/"); idx >= 0 && idx+1 < len(candidate) {
		if number, ok := parseNumericCandidate(candidate[idx+1:]); ok {
			return number, nil
		}
	}

	return 0, fmt.Errorf("unable to determine pull request number from %q", input)
}

func parseNumericCandidate(raw string) (int, bool) {
	trimmed := strings.TrimSpace(raw)