Update template for golang

Signed-off-by: Tyler Rockwood <[email protected]>

src/go/rpk/pkg/cli/wasm/template/golang/README.md

@@ -0,0 +1,19 @@
+# Redpanda Golang WASM Transform
+
+To get started you first need to have installed [tinygo].
+
+You can get started by modifying the <code>transform.go</code> file
+with your logic.
+
+Once you're ready to test out your transform live you need to:
+
+1. Make sure you have a container running via <code>rpk container start</code>
+1. Run <code>rpk wasm build</code>
+1. Run <code>rpk wasm deploy</code>
+1. Then use <code>rpk topic produce</code> and <code>rpk topic consume</code>
+   to see your transformation live!
+
+⚠️ At the moment the transform you deploy is not persisted to disk, so if you
+restart your container you'll need to redeploy.
+
+[tinygo]: https://tinygo.org/getting-started/install/

src/go/rpk/pkg/cli/wasm/template/golang/transform.gosrc

@@ -0,0 +1,13 @@
+package main
+
+import (
+	"github.com/rockwotj/redpanda/src/go/sdk"
+)
+
+func main() {
+	redpanda.OnTransform(onTransform)
+}
+
+func onTransform(e redpanda.TransformEvent) ([]redpanda.Record, error) {
+	return []redpanda.Record{e.Record()}, nil
+}

src/go/rpk/pkg/cli/wasm/template/golang_template.go

@@ -10,36 +10,19 @@
 package template
 
 import (
+	_ "embed"
 	"strings"
 	"text/template"
 )
 
-const wasmMainFile = `
-package main
-
-import (
-	"io"
-
-	"github.com/rockwotj/redpanda/src/go/sdk"
-)
-
-func main() {
-	redpanda.OnTransform(onTransform)
-}
-
-// This is an example of the "identity" transform that does nothing.
-// You'll want to replace this with something that modifies the key
-// or value.
-func onTransform(e redpanda.TransformEvent) ([]redpanda.Record, error) {
-	return []redpanda.Record{e.Record()}, nil
-}
-`
+//go:embed golang/transform.gosrc
+var wasmMainFile string
 
 func WasmGoMain() string {
 	return wasmMainFile
 }
 
-func ExecTemplate(filename string, source string, data interface{}) (string, error) {
+func execTemplate(filename string, source string, data interface{}) (string, error) {
 	var tpl strings.Builder
 	t, err := template.New(filename).Parse(source)
 	if err != nil {
@@ -56,30 +39,11 @@ go 1.18
 `
 
 func WasmGoModule(name string) (string, error) {
-	return ExecTemplate("go.mod", wasmGoModFile, name)
+	return execTemplate("go.mod", wasmGoModFile, name)
 }
 
-const wasmGoReadme = `
-# Redpanda Golang WASM Transform
-
-To get started you first need to have installed [tinygo].
-
-You can get started by modifying the <code>transform.go</code> file
-with your logic.
-
-Once you're ready to test out your transform live you need to:
-
-1. Make sure you have a container running via <code>rpk container start</code>
-1. Run <code>rpk wasm build</code>
-1. Run <code>rpk wasm deploy [topic]</code>
-1. Then use <code>rpk topic produce [topic]</code> and <code>rpk topic consume [topic]</code> 
-   to see your transformation live!
-
-⚠️ At the moment the transform you deploy is applied on all topics in a cluster 
-and is not persisted to disk, so if you restart your container you'll need to redeploy.
-
-[tinygo]: https://tinygo.org/getting-started/install/
-`
+//go:embed golang/README.md
+var wasmGoReadme string
 
 func WasmGoReadme() string {
 	return wasmGoReadme