Last Go Printf output missing if no newline

[clstokes]

Problem

It seems that if the last fmt.Printf("") in my Go pulumi application does not end with a newline, it's output never gets printed/flushed to the user's terminal.

Suggestion

Print all console output.

Steps to reproduce

1. preview the code below

Code to reproduce

package main

import (
	"fmt"

	"github.com/pulumi/pulumi-aws/sdk/go/aws/s3"
	"github.com/pulumi/pulumi/sdk/go/pulumi"
)

func main() {
	pulumi.Run(func(ctx *pulumi.Context) error {
		// Create an AWS resource (S3 Bucket)
		bucket, err := s3.NewBucket(ctx, "my-bucket", nil)
		if err != nil {
			return err
		}

		fmt.Printf("1 - with newline\n")
		fmt.Printf("2 - no newline")
		fmt.Printf("3 - with newline\n")
		fmt.Printf("4 - no newline")
		// fmt.Printf("\n") // <-- uncomment this to see the "4 - no newline" get printed

		// Export the name of the bucket
		ctx.Export("bucketName", bucket.ID())
		return nil
	})
}

Output from the code above

aws-go-printf % pulumi preview
Previewing update (dev):
     Type                 Name               Plan       Info
 +   pulumi:pulumi:Stack  aws-go-printf-dev  create     2 messages
 +   └─ aws:s3:Bucket     my-bucket          create     
 
Diagnostics:
  pulumi:pulumi:Stack (aws-go-printf-dev):
    1 - with newline
    2 - no newline3 - with newline
 

Permalink: https://app.pulumi.com/clstokes/aws-go-printf/dev/previews/84e69cb9-ebe4-4ec0-becf-0ac1b91004f3

[rjshrjndrn]

I was checking why my debug messages never shows. Thanks for bringing this up. 👍