feat: add inline and block runner. Improve execution error handling

render.go

@@ -2,28 +2,13 @@ package main
 
 import (
 	"bytes"
-	"fmt"
-	"os/exec"
 	"text/template"
 )
 
-func sh(ctx TemplateContext) func(string) string {
-	return func(command string) string {
-		cmd := exec.Command("sh", "-c", command)
-		for k, v := range ctx {
-			cmd.Env = append(cmd.Env, k+"="+v)
-		}
-		out, err := cmd.Output()
-		if err != nil {
-			return fmt.Sprintf("> Failed to execute the command: %s\n> %s\n", cmd.Args, err.Error())
-		}
-		return fmt.Sprintf("\n```\n%s\n```\n", string(out))
-	}
-}
-
 func render(tmpl string, ctx TemplateContext) []byte {
 	funcMap := template.FuncMap{
-		"sh": sh(ctx),
+		"sh":    ctx.inline,
+		"shell": ctx.codeBlock,
 	}
 	t, err := template.New("foo").Funcs(funcMap).Parse(tmpl)
 	if err != nil {