gopherjs
diff --git a/‎compiler/prelude/generate.go
Lines changed: 4 additions & 0 deletions b/‎compiler/prelude/generate.go
Lines changed: 4 additions & 0 deletions
diff --git a/‎compiler/prelude/genprelude.go
Lines changed: 51 additions & 8 deletions b/‎compiler/prelude/genprelude.go
Lines changed: 51 additions & 8 deletions
@@ -0,0 +1,4 @@
+package prelude
+
+//go:generate go run formatpreludejs.go
+//go:generate go run genprelude.go
@@ -3,19 +3,19 @@
 package main
 
 import (
+	"bytes"
 	"fmt"
 	"go/build"
 	"io/ioutil"
 	"log"
 	"os/exec"
 	"path/filepath"
 	"strings"
-
-	"github.com/gopherjs/gopherjs/compiler/prelude"
 )
 
 const (
-	fn = "prelude.go"
+	fn    = "prelude.go"
+	minFn = "prelude_min.go"
 )
 
 func main() {
@@ -32,24 +32,67 @@ func run() error {
 
 	preludeDir := filepath.Join(bpkg.Dir, "compiler", "prelude")
 
-	args := []string{
+	files := []string{
+		"prelude.js",
+		"numeric.js",
+		"types.js",
+		"goroutines.js",
+		"jsmapping.js",
+	}
+
+	prelude := new(bytes.Buffer)
+
+	for _, f := range files {
+		p := filepath.Join(preludeDir, f)
+		byts, err := ioutil.ReadFile(p)
+		if err != nil {
+			return fmt.Errorf("failed to read from %v: %v", p, err)
+		}
+		if _, err := prelude.Write(byts); err != nil {
+			return fmt.Errorf("failed to append prelude: %v", err)
+		}
+	}
+
+	args := append([]string{
 		filepath.Join(bpkg.Dir, "node_modules", ".bin", "uglifyjs"),
 		"--config-file",
 		filepath.Join(preludeDir, "uglifyjs_options.json"),
-	}
+	}, files...)
+
 	cmd := exec.Command(args[0], args[1:]...)
-	cmd.Stdin = strings.NewReader(prelude.Prelude)
 
 	out, err := cmd.CombinedOutput()
 	if err != nil {
 		return fmt.Errorf("failed to run %v: %v\n%s", strings.Join(args, " "), err, string(out))
 	}
 
-	out = append([]byte("// Code generated by genmin. DO NOT EDIT.\n\n"), out...)
+	err = writeOutput("prelude.go", ""+
+		"// Prelude is the GopherJS JavaScript interop layer that is behind\n"+
+		"// the github.com/gopherjs/gopherjs/js package\n"+
+		"const Prelude = `"+escapeBacktick(prelude.Bytes())+"`")
 
-	if err := ioutil.WriteFile(fn, out, 0644); err != nil {
+	if err != nil {
+		return err
+	}
+
+	err = writeOutput("prelude_min.go", ""+
+		"// Minified is an uglifyjs-minified version of Prelude\n"+
+		"const Minified = `"+escapeBacktick(out)+"`\n")
+
+	return err
+}
+
+func writeOutput(fn string, s string) error {
+	content := "// Code generated by genprelude. DO NOT EDIT.\n\n" +
+		"package prelude\n" + s + "\n"
+
+	if err := ioutil.WriteFile(fn, []byte(content), 0644); err != nil {
 		return fmt.Errorf("failed to write to %v: %v", fn, err)
 	}
 
 	return nil
 }
+
+func escapeBacktick(byts []byte) string {
+	return strings.Replace(string(byts), "`", "\\u0060", -1)
+}