From 4c14d0484cf1eaa0246d84887d92c0fa39e43d1d Mon Sep 17 00:00:00 2001
From: Adam Babik <a.babik@designfortress.com>
Date: Tue, 18 Oct 2022 15:29:47 +0200
Subject: [PATCH] Expose PrepareScript in WASM build (#48)

---
 examples/web/index.html  |  1 +
 internal/runner/shell.go |  4 ++++
 web/main_js.go           | 12 ++++++++++++
 3 files changed, 17 insertions(+)

diff --git a/examples/web/index.html b/examples/web/index.html
index 9e834a970..abd0bc1ba 100644
--- a/examples/web/index.html
+++ b/examples/web/index.html
@@ -22,6 +22,7 @@
         go.run(runme.instance);
         console.log(GetSnippets(markdown));
         console.log(GetDocument(markdown));
+        console.log(PrepareScript(["bash -c 'echo \"1\"'"]));
       });
     </script>
   </head>
diff --git a/internal/runner/shell.go b/internal/runner/shell.go
index 01123e5d1..e05b7b2cf 100644
--- a/internal/runner/shell.go
+++ b/internal/runner/shell.go
@@ -48,6 +48,10 @@ func (s *Shell) Run(ctx context.Context) error {
 	return execSingle(ctx, sh, s.Dir, prepareScript(s.Cmds), s.Stdin, s.Stdout, s.Stderr)
 }
 
+func PrepareScript(cmds []string) string {
+	return prepareScript(cmds)
+}
+
 func prepareScript(cmds []string) string {
 	var b strings.Builder
 
diff --git a/web/main_js.go b/web/main_js.go
index 0fbe85d2f..e67e1b12a 100644
--- a/web/main_js.go
+++ b/web/main_js.go
@@ -7,6 +7,7 @@ import (
 
 	"github.com/stateful/runme/internal/document"
 	"github.com/stateful/runme/internal/renderer"
+	"github.com/stateful/runme/internal/runner"
 )
 
 // These are variables so that they can be set during the build time.
@@ -19,6 +20,7 @@ var (
 func main() {
 	js.Global().Set("GetSnippets", js.FuncOf(GetBlocks))
 	js.Global().Set("GetDocument", js.FuncOf(GetDocument))
+	js.Global().Set("PrepareScript", js.FuncOf(PrepareScript))
 
 	select {}
 }
@@ -59,3 +61,13 @@ func GetDocument(this js.Value, args []js.Value) interface{} {
 
 	return dynamic
 }
+
+func PrepareScript(this js.Value, args []js.Value) interface{} {
+	lines := args[0]
+	len := lines.Length()
+	scriptLines := make([]string, 0, len)
+	for i := 0; i < len; i++ {
+		scriptLines = append(scriptLines, lines.Index(i).String())
+	}
+	return runner.PrepareScript(scriptLines)
+}