Switch to iterative instead of recursive.

src/command/build/runner.rs

@@ -5,6 +5,7 @@ use std::sync::Mutex;
 
 use super::stylesheet::Stylesheet;
 use super::walk_fs::walk_fs;
+use super::walk_fs::WalkAction;
 use crate::cli::parameters::BuildArgs;
 use crate::command::build::render::SiteRenderer;
 use crate::config::Config;
@@ -61,12 +62,21 @@ async fn get_output_directory(config: &Config) -> Result<PathBuf, CustomError> {
     Ok(output_directory)
 }
 
-async fn filter_to_post_directories(entry: &DirEntry) -> Result<bool, CustomError> {
-    Ok(true)
+async fn filter_to_highest_folders_containing_org_files(
+    entry: &DirEntry,
+) -> Result<WalkAction, CustomError> {
+    let file_type = entry.file_type().await?;
+    let mut entries = tokio::fs::read_dir(entry.path()).await?;
+
+    todo!()
 }
 
 async fn get_post_directories(config: &Config) -> Result<Vec<PathBuf>, CustomError> {
-    walk_fs(config.get_posts_directory(), filter_to_post_directories).await?;
+    walk_fs(
+        config.get_posts_directory(),
+        filter_to_highest_folders_containing_org_files,
+    )
+    .await?;
 
     let mut ret = Vec::new();
     if !config.get_posts_directory().exists() {