hacktastic time it took a pr to get merged

main.go

package main

import (
	"golang.org/x/oauth2"
	"github.com/google/go-github/github"
	"context"
	"fmt"
	"time"
	"os"
	"log"
	"encoding/csv"
)

func main() {
	if len(os.Args) != 4 {
		fmt.Printf("Usage: %s token owner repository\n", os.Args[0])
		os.Exit(1)
	}
	token := os.Args[1]
	owner := os.Args[2]
	repository := os.Args[3]

	ctx := context.Background()
	ts := oauth2.StaticTokenSource(
		&oauth2.Token{AccessToken: token},
	)
	tc := oauth2.NewClient(ctx, ts)

	client := github.NewClient(tc)

	w := csv.NewWriter(os.Stdout)
	w.Write([]string{"url", "created_at", "merged_at", "duration"})

	// get all pages of results
	opt := github.PullRequestListOptions{State: "closed"}

	for {
		pulls, resp, err := client.PullRequests.List(ctx, owner, repository, &opt)

		if err != nil {
			panic(err.Error())
		}

		for _, pullRequest := range pulls {
			if pullRequest.GetMergedAt() == (time.Time{}) {
				continue
			}

			if err := w.Write([]string{pullRequest.GetURL(), pullRequest.GetCreatedAt().Format(time.RFC3339), pullRequest.GetMergedAt().Format(time.RFC3339), pullRequest.GetMergedAt().Sub(pullRequest.GetCreatedAt()).String()}); err != nil {
				log.Fatalln("error writing record to csv:", err)
			}

			w.Flush()
		}

		if resp.NextPage == 0 {
			break
		}
		opt.Page = resp.NextPage
	}
	
}