title: cannot find package "firebase.google.com/go" in google cloud function
body: <p>I'm trying to run some example code that stores some random data using a cloud function in the Firestore server, however, Cloud functions deploy command refuses to build the command:</p>
  
  <pre class="lang-golang prettyprint-override"><code>// Package p contains an HTTP Cloud Function.
  package p
  
  import (
      //...
      firebase "firebase.google.com/go"
      "log"
      "net/http"
      "os"
  )
  
  // Store1 Stores data on FireBase
  func Store1(w http.ResponseWriter, r *http.Request) {
  
      // Use the application default credentials
      ctx := context.Background()
  
      conf := &amp;firebase.Config{ProjectID: "firefirefire"}
      app, err := firebase.NewApp(ctx, conf)
      if err != nil {
          log.Fatalln(err)
      }
  
      client, err := app.Firestore(ctx)
      if err != nil {
          log.Fatalln(err)
      }
      defer client.Close()
  
      _, _, err = client.Collection("users").Add(ctx, map[string]interface{}{
          "first": "Ada",
          "last":  "Lovelace",
          "born":  1815,
      })
  
      if err != nil {
          log.Fatalf("Failed adding alovelace: %v", err)
      }
      fmt.Println("ENV:" + os.Getenv("VAR1"))
      fmt.Fprint(w, html.EscapeString(d.Message))
  }
  </code></pre>
  
  <p>This is what I get as an error:</p>
  
  <pre><code>localhost:store1 b$ ./deploy.sh
  Updated property [functions/region].
  Deploying function (may take a while - up to 2 minutes)...failed.
  ERROR: (gcloud.functions.deploy) OperationError: code=3, message=Build failed: /tmp/sgb/gopath/src/serverlessapp/vendor/p/store1.go:6:2: cannot find package "firebase.google.com/go" in any of:
      /tmp/sgb/gopath/src/serverlessapp/vendor/firebase.google.com/go (vendor tree)
      /go/src/firebase.google.com/go (from $GOROOT)
      /tmp/sgb/gopath/src/firebase.google.com/go (from $GOPATH)
  </code></pre>
  
  <p>As you can see, the problem seems to be that Google doesn't have firebase.google.com/go on Cloud functions engine and as a result I can't have my serverless configuration do the firebase thing.
  Should I move to CloudSQL and just pay the $11 fee ?
  Should I continue to try to get Firebase to work?
  Should I try a Firebase Function instead?
  Please advise.</p>