Simple script to list all GoogleCloudPlatform repos on GitHub and check for those which do not define a top-level app.yaml file.

main.go

package main

import (
        "encoding/json"
        "fmt"
        "log"
        "net/http"
        "strings"
)

func main() {
        resp, err := http.Get("https://api.github.com/users/GoogleCloudPlatform/repos")
        if err != nil {
                log.Fatalf("get:", err)
        }
        var r response
        err = json.NewDecoder(resp.Body).Decode(&r)
        if err != nil {
                log.Fatalf("decode:", err)
        }
        log.Printf("Found %d repos\n", len(r))
        for _, repo := range r {
                url := strings.Replace(repo.ContentsURL, "{+path}", "app.yaml", -1)
                resp, err = http.Get(url)
                if err != nil {
                        log.Fatalf("get %s:", url, err)
                }
                if resp.StatusCode == http.StatusNotFound {
                        fmt.Println(repo.FullName)
                }
        }
}

type response []struct {
        FullName    string `json:"full_name"`
        ContentsURL string `json:"contents_url"`
}