Detail GitHub App Installations

main.go

package main

import (
	"context"
	"flag"
	"fmt"
	"os"
	"reflect"
	"time"

	"github.com/golang-jwt/jwt/v5"
	"github.com/google/go-github/v50/github"
	"golang.org/x/oauth2"
)

func main() {

	var installationID int
	var keyPath string
	flag.IntVar(&installationID, "id", 0, "GitHub App Installation ID")
	flag.StringVar(&keyPath, "key", "", "GitHub App Private Key")

	flag.Parse()

	data, err := os.ReadFile(keyPath)
	if err != nil {
		panic(err)
	}

	key, err := jwt.ParseRSAPrivateKeyFromPEM(data)
	if err != nil {
		panic(err)
	}

	token := jwt.NewWithClaims(jwt.SigningMethodRS256, jwt.MapClaims{
		"iat": time.Now().Unix(),
		"exp": time.Now().Add(time.Minute * 10).Unix(),
		"iss": installationID,
	})
	signed, err := token.SignedString(key)
	if err != nil {
		panic(err)
	}

	c := oauth2.NewClient(context.Background(), oauth2.StaticTokenSource(&oauth2.Token{AccessToken: signed}))

	ghClient := github.NewClient(c)

	installations, _, err := ghClient.Apps.ListInstallations(context.Background(), &github.ListOptions{})

	if err != nil {
		panic(err)
	}

	for _, installation := range installations {
		if installation.SuspendedAt == nil {
			fmt.Printf("Installation ID: %d - Account: %s \n", installation.GetID(), installation.GetAccount().GetLogin())
			fmt.Printf("- Repositories: %s\n", installation.GetRepositorySelection())
			fmt.Printf("- Permissions:\n")
			p := installation.GetPermissions()
			val := reflect.ValueOf(p).Elem()
			for i := 0; i < val.NumField(); i++ {
				rv := reflect.ValueOf(p)

				field := val.Type().Field(i)

				value := reflect.Indirect(rv).FieldByName(field.Name)

				if !value.IsNil() {

					switch value.Kind() {
					case reflect.String:
						b := value.String()
						fmt.Printf(" - %s=%s\n", field.Name, b)
					case reflect.Ptr:
						b := value.Elem().String()
						fmt.Printf(" - %s=%s\n", field.Name, b)
					}
				}

			}
		}
	}

	fmt.Printf("Suspended Installations\n")
	for _, installation := range installations {
		if installation.SuspendedAt != nil {
			fmt.Printf("Installation ID: %d - Account: %s - Suspended at: %s by: %s\n", installation.GetID(),
				installation.GetAccount().GetLogin(),
				installation.GetSuspendedAt().Format(time.RFC3339),
				installation.GetSuspendedBy().GetLogin())
		}
	}

}