Contributor stats

ratio.go

package main

import (
	"code.google.com/p/goauth2/oauth"
	"fmt"
	"github.com/google/go-github/github"
	"os"
	"strconv"
)

type SummarisedStat struct {
	Author    *github.Contributor
	Additions *int
	Deletions *int
	Total     *int
}

func (s SummarisedStat) Ratio() int {
	return (*s.Additions - *s.Deletions) / *s.Total
}

func (s SummarisedStat) Summary() string {
	return "+" + strconv.Itoa(*s.Additions) + " -" + strconv.Itoa(*s.Deletions)
}

func sumStats(contrib github.ContributorStats) *SummarisedStat {
	additions := 0
	deletions := 0
	for _, weekly := range contrib.Weeks {
		additions += *weekly.Additions
		deletions += *weekly.Deletions
	}

	return &SummarisedStat{contrib.Author, &additions, &deletions, contrib.Total}
}

func main() {
	if len(os.Args) < 3 {
		fmt.Println("Usage:", os.Args[0], "<user>", "<repo>")
		os.Exit(1)
	}

	user := os.Args[1]
	repo := os.Args[2]

	fmt.Printf("Summary for: %s/%s\n\n", user, repo)

	t := &oauth.Transport{
		Token: &oauth.Token{AccessToken: os.Getenv("GITHUB_API_TOKEN")},
	}

	client := github.NewClient(t.Client())
	stats, _, err := client.Repositories.ListContributorsStats(user, repo)

	if err != nil {
		fmt.Println("error", err)
		os.Exit(2)
	}

	for _, contrib := range stats {
		summary := sumStats(contrib)
		fmt.Println("Author:", *summary.Author.Login)
		fmt.Println("Commits:", *summary.Total)
		fmt.Println("Summary:", summary.Summary())
		fmt.Println("Ratio:", summary.Ratio(), "lines per commit")
		fmt.Println()
	}
}