Output Examples - Go - Create Template

main.go

package main

import (
	"fmt"
	"os"
	"text/template"

	"github.com/pulumi/pulumi-aws/sdk/v2/go/aws/s3"
	"github.com/pulumi/pulumi/sdk/v2/go/pulumi"
)

type buckets struct {
	Main         string
	OtherBuckets []interface{}
}

func main() {
	pulumi.Run(func(ctx *pulumi.Context) error {

		var bucketNames []interface{}

		mainBucket, err := s3.NewBucket(ctx, "main-bucket", nil)
		if err != nil {
			return err
		}
		bucketNames = append(bucketNames, mainBucket.Bucket)

		numBuckets := 4
		for i := 1; i < numBuckets; i++ {
			bucket, err := s3.NewBucket(ctx, fmt.Sprintf("my-bucket-%02d", i), nil)
			if err != nil {
				return err
			}
			bucketNames = append(bucketNames, bucket.Bucket)
		}

		templateOutput := pulumi.All(bucketNames...).ApplyT(
			func(args []interface{}) (string, error) {
				allBuckets := new(buckets)
				allBuckets.Main = args[0].(string)
				allBuckets.OtherBuckets = args[1:]

				var tmplSrc = `main: {{.Main}}
otherBuckets:
{{- range $i, $e := .OtherBuckets}}
- {{$e}}
{{- end}}
`
				t := template.Must(template.New("test").Parse(tmplSrc))

				f, err := os.Create("buckets.yaml")
				if err != nil {
					ctx.Log.Error(fmt.Sprintf("error creating file: %s", err), nil)
					return "", err
				}

				err = t.Execute(f, allBuckets)
				if err != nil {
					ctx.Log.Error(fmt.Sprintf("error executing template: %s", err), nil)
					return "", err
				}

				f.Close()

				return "", nil
			},
		)

		ctx.Export("mainBucketName", mainBucket.ID())
		ctx.Export("templateOutput", templateOutput) // must Export templateOutput until https://github.com/pulumi/pulumi/issues/3991 is resolved
		return nil
	})
}