first commit

fstools/.gitignore

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+/target

fstools/Cargo.toml

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+[package]
+name = "fstools"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]

fstools/src/lib.rs

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+use std::collections::HashSet;
+use std::fs;
+use std::path::PathBuf;
+
+/// Recursively crawl through the directory given and aggregate all file handles to a HashMap with
+/// their respective (relative) paths as keys.
+pub fn crawl_fs(root: &PathBuf) -> HashSet<PathBuf> {
+    crawl_fs_rec(root, root)
+}
+
+/// Helper function: Recursively crawl through the directory given and aggregate all file handles to a HashMap with
+/// their respective (relative) paths as keys.
+fn crawl_fs_rec(root: &PathBuf, path: &PathBuf) -> HashSet<PathBuf> {
+    let mut subdirs = Vec::with_capacity(100);
+    let mut files = HashSet::with_capacity(1024);
+
+    match fs::read_dir(path) {
+        Ok(entries) => {
+            for entry in entries {
+                match entry {
+                    Ok(entry) => {
+                        if entry.path().is_dir() {
+                            subdirs.push(entry.path());
+                        } else {
+                            let path = entry.path();
+                            if let Ok(path_no_prefix) = path.strip_prefix(root) {
+                                files.insert(path_no_prefix.into());
+                            }
+                        }
+                    }
+                    Err(_e) => {}
+                }
+            }
+        }
+        Err(_e) => {}
+    }
+
+    let others: HashSet<PathBuf> = subdirs
+        .into_iter()
+        .flat_map(|s| crawl_fs_rec(root, &s))
+        .collect();
+
+    files.extend(others);
+    files
+}