template with sh func

main.go

@@ -0,0 +1,34 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"strings"
+	"text/template"
+)
+
+var tmpl = `
+Hello this is the text:
+{{ sh "hledger bal assets" }}
+`
+
+func sh(command string) string {
+	args := strings.Split(command, " ")
+	out, err := exec.Command(args[0], args[1:]...).Output()
+	if err != nil {
+		return fmt.Sprintf("> Failed to execute the command:\n> %s\n", err.Error())
+	}
+	return fmt.Sprintf("\n```\n%s\n```\n", string(out))
+}
+
+func main() {
+	funcMap := template.FuncMap{
+		"sh": sh,
+	}
+	t, err := template.New("foo").Funcs(funcMap).Parse(tmpl)
+	if err != nil {
+		panic(err)
+	}
+	t.Execute(os.Stdout, "hledger is awesome")
+}