Ytukyg

I have attempted to deploy my Go app to app engine. I have a the following build errors:

Starting Step #1 - "builder"

Step #1 - "builder": Pulling image: gcr.io/gae-runtimes/go111_app_builder:go111_1_11_2_20181111_RC00

Step #1 - "builder": go111_1_11_2_20181111_RC00: Pulling from gae-runtimes/go111_app_builder

Step #1 - "builder": Digest: sha256:51fb36bfa16e7013356867c3a3972986084df93e56258fc258579a5799f0436e

Step #1 - "builder": Status: Downloaded newer image for gcr.io/gae-runtimes/go111_app_builder:go111_1_11_2_20181111_RC00

Step #1 - "builder": 2018/11/24 18:13:29 Your app is not on your GOPATH, this build may fail.

Step #1 - "builder": 2018/11/24 18:13:29 Building from Go source in /tmp/staging477638319/srv, with main package at ./...

Step #1 - "builder": 2018/11/24 18:13:29 Building /tmp/staging477638319/srv, saving to /tmp/staging477638319/usr/local/bin/start

Step #1 - "builder": 2018/11/24 18:13:30 Wrote build output to /builder/outputs/output

Step #1 - "builder": 2018/11/24 18:13:30 Failed to build app: Your app is not on your GOPATH, please move it there and try again.

Step #1 - "builder": building app with command '[go build -o /tmp/staging477638319/usr/local/bin/start ./...]', env '[PATH=/go/bin:/usr/local/go/bin:/builder/google-cloud-sdk/bin/:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin HOSTNAME=d253e517b16c HOME=/builder/home BUILDER_OUTPUT=/builder/outputs DEBIAN_FRONTEND=noninteractive GOROOT=/usr/local/go/ GOPATH=/go GOPATH=/tmp/staging477638319/srv/gopath]': err=exit status 1, out=srv/main.go:7:2: cannot find package "cloud.google.com/go/firestore" in any of:

Step #1 - "builder": /usr/local/go/src/cloud.google.com/go/firestore (from $GOROOT)

Step #1 - "builder": /tmp/staging477638319/srv/gopath/src/cloud.google.com/go/firestore (from $GOPATH)

Step #1 - "builder": srv/main.go:8:2: cannot find package "github.com/gin-gonic/gin" in any of:

Step #1 - "builder": /usr/local/go/src/github.com/gin-gonic/gin (from $GOROOT)

Step #1 - "builder": /tmp/staging477638319/srv/gopath/src/github.com/gin-gonic/gin (from $GOPATH)

Step #1 - "builder": srv/main.go:9:2: cannot find package "google.golang.org/api/option" in any of:

Step #1 - "builder": /usr/local/go/src/google.golang.org/api/option (from $GOROOT)

Step #1 - "builder": /tmp/staging477638319/srv/gopath/src/google.golang.org/api/option (from $GOPATH)

Finished Step #1 - "builder"

ERROR

ERROR: build step 1 "gcr.io/gae-runtimes/go111_app_builder:go111_1_11_2_20181111_RC00" failed: exit status 1

My app.yaml file looks like:

runtime: go111

handlers:

- url: /api/user

  script: auto



- url: /favicon.ico

  static_files: build/favicon.ico

  upload: build/favicon.ico



- url: /

  static_files: build/index.html

  upload: build/index.html



- url: /

  static_dir: build

My main.go file at the root looks like:

package main



import (

    "context"

    "net/http"



    "cloud.google.com/go/firestore"

    "github.com/gin-gonic/gin"

    "google.golang.org/api/option"

)



const firestoreAccountFile = "firebase.json"

const firestoreProjectID = "golang-gae-firestore-template"



type formData struct {

    Name  string `json:"name" binding:"required"`

    Email string `json:"email" binding:"required"`

}



func main() {

    // Gin init

    r := gin.Default()

    // Serve from static build directory

    r.StaticFS("/", http.Dir("./build"))

    // routes

    r.POST("/api/user", userHandler)

    // run application on port 8080

    r.Run(":8080")

}



func writeLogIfError(c *gin.Context, err error) {

    if err != nil {

        c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})

    }

}



func getNewFirestoreClient(ctx context.Context) (*firestore.Client, error) {

    return firestore.NewClient(ctx, firestoreProjectID, option.WithServiceAccountFile(firestoreAccountFile))

}



func userHandler(c *gin.Context) {

    ctx := context.Background()



    client, err := getNewFirestoreClient(ctx)

    writeLogIfError(c, err)

    defer client.Close()

    // Get form data

    var form formData

    c.BindJSON(&form)



    // [START add user to firestore]

    _, _, err = client.Collection("users").Add(ctx, map[string]interface{}{

        "name":  form.Name,

        "email": form.Email,

    })

    if err != nil {

        c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})

        return

    }

    // [END add user to firestore]

    c.JSON(http.StatusOK, gin.H{"status": "user added to db"})

}

I cannot build successfully without getting these build errors. I've atttempted to follow documentation for golang on App Engine exactly and am confused if I am to structure my application any different than suggested. Any thoughts on how to resolve this GOPATH error, and thank you in advance?

Update: I was unable to successfully deploy with GOPATH, and instead successfully was able to deploy with go.mod after I included the env variable: export GO111MODULE=on for the modules to work. Documentation here: https://github.com/golang/go/wiki/Modules.