Add the crate dependency graph visualization to the contributor guide (#3907)

* Add the crate dependency graph visualization to the contributor guide

* Code review fixes

* And more

tools/node-docs/src/main.rs

@@ -7,7 +7,13 @@ use crate::utility::*;
 use convert_case::{Case, Casing};
 use std::collections::HashMap;
 
-fn main() {
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+	let output_path = std::env::args_os()
+		.nth(1)
+		.ok_or("Usage: node-docs <output-directory>")?
+		.into_string()
+		.map_err(|_| "Output path is not valid UTF-8")?;
+
 	// TODO: Also obtain document nodes, not only proto nodes
 	let nodes = graphene_std::registry::NODE_METADATA.lock().unwrap();
 
@@ -22,7 +28,7 @@ fn main() {
 	categories.sort();
 
 	// Create _index.md for the node catalog page
-	page_catalog::write_catalog_index_page(&categories);
+	page_catalog::write_catalog_index_page(&output_path, &categories);
 
 	// Create node category pages and individual node pages
 	for (index, category) in categories.iter().map(|c| if !OMIT_HIDDEN && c.is_empty() { "Hidden" } else { c }).filter(|c| !c.is_empty()).enumerate() {
@@ -32,7 +38,7 @@ fn main() {
 
 		// Create _index.md file for category
 		let category_path_part = sanitize_path(&category.to_case(Case::Kebab));
-		let category_path = format!("{NODE_CATALOG_PATH}/{category_path_part}");
+		let category_path = format!("{output_path}/{category_path_part}");
 		page_category::write_category_index_page(index, category, &nodes, &category_path);
 
 		// Create individual node pages
@@ -40,4 +46,6 @@ fn main() {
 			page_node::write_node_page(index, id, metadata, &category_path);
 		}
 	}
+
+	Ok(())
 }