This will tell you how many points are in a milestone for github.com/google/kf

kf-points.go

package main

import (
	"context"
	"flag"
	"fmt"
	"os"
	"strconv"

	"github.com/google/go-github/github"
)

func main() {
	milestone := flag.String("milestone", "0.2", "The milestone to look for")
	flag.Parse()

	client := github.NewClient(nil)

	milestoneNumber, err := fetchMilestoneNumber(client, *milestone)
	if err != nil {
		fmt.Fprintln(os.Stderr, err)
		os.Exit(1)
	}

	labels := map[string]int{
		"points/1":  1,
		"points/2":  2,
		"points/3":  3,
		"points/5":  5,
		"points/8":  8,
		"points/13": 13,
	}

	var points int

	for label := range labels {
		issues, _, err := client.Issues.ListByRepo(context.Background(), "google", "kf", &github.IssueListByRepoOptions{
			Milestone: milestoneNumber,
			Labels:    []string{label},
		})

		if err != nil {
			fmt.Fprintf(os.Stderr, "failed to read issues: %s\n", err)
			os.Exit(1)
		}

		for _, issue := range issues {
			for _, label := range issue.Labels {
				if label.Name == nil {
					continue
				}
				points += labels[*label.Name]
			}
		}
	}

	fmt.Println(points)
}

func fetchMilestoneNumber(client *github.Client, milestone string) (string, error) {
	if milestone == "*" || milestone == "none" {
		return milestone, nil
	}

	milestones, _, err := client.Issues.ListMilestones(context.Background(), "google", "kf", nil)
	if err != nil {
		return "", fmt.Errorf("failed to read milestones: %s", err)
	}

	milestoneNumber := -1
	for _, m := range milestones {
		if m.Number == nil || m.Title == nil || *m.Title != milestone {
			continue
		}
		milestoneNumber = *m.Number
		break
	}

	if milestoneNumber == -1 {
		return "", fmt.Errorf("unable to find milestone %q", milestone)
	}

	return strconv.FormatInt(int64(milestoneNumber), 10), nil
}