Remove ouroboros

Cargo.toml

@@ -8,7 +8,6 @@ edition = "2021"
 [dependencies]
 anyhow = "1.0.75"
 maplit = "1.0.2"
-ouroboros = "0.18.0"
 pathfinding = "4.3.3"
 rayon = "1.8.0"
 rustpython-parser = "0.3.0"

src/import_graph/builder.rs

@@ -1,7 +1,11 @@
 use anyhow::Result;
 use std::path::{Path, PathBuf};
+use std::sync::Arc;
 
 use super::graph;
+use super::import_discovery;
+use super::indexing;
+use super::package_discovery;
 
 pub struct ImportGraphBuilder {
     pub(super) root_package_path: PathBuf, // ignored_imports
@@ -16,7 +20,20 @@ impl ImportGraphBuilder {
         }
     }
 
-    pub fn build(self) -> Result<graph::ImportGraph> {
-        graph::ImportGraph::build(self)
+    pub fn build(&self) -> Result<graph::ImportGraph> {
+        let root_package = package_discovery::discover_package(self.root_package_path.as_path())?;
+        let packages_by_pypath = indexing::get_packages_by_pypath(Arc::clone(&root_package))?;
+        let modules_by_pypath = indexing::get_modules_by_pypath(Arc::clone(&root_package))?;
+        let packages_by_module = indexing::get_packages_by_module(Arc::clone(&root_package))?;
+        let imports =
+            import_discovery::discover_imports(Arc::clone(&root_package), &modules_by_pypath)?;
+        let reverse_imports = indexing::reverse_imports(&imports)?;
+        Ok(graph::ImportGraph {
+            packages_by_pypath,
+            modules_by_pypath,
+            packages_by_module,
+            imports,
+            reverse_imports,
+        })
     }
 }