fix(ast_codegen): create output path if doesn't exist.

tasks/ast_codegen/src/util.rs

@@ -259,9 +259,13 @@ impl TokenStreamExt for TokenStream {
     }
 }
 
-pub fn write_all_to<S: AsRef<str>>(data: &[u8], path: S) -> std::io::Result<()> {
+pub fn write_all_to<S: AsRef<std::path::Path>>(data: &[u8], path: S) -> std::io::Result<()> {
     use std::{fs, io::Write};
-    let mut file = fs::File::create(path.as_ref())?;
+    let path = path.as_ref();
+    if let Some(parent) = path.parent() {
+        fs::create_dir_all(parent)?;
+    }
+    let mut file = fs::File::create(path)?;
     file.write_all(data)?;
     Ok(())
 }