feat: add local repository scanning (#8)

Reviewed-on: https://git.reya.su/reya/signed/pulls/8

crates/signed_state/src/lib.rs

@@ -1,5 +1,6 @@
 mod backend;
 mod git_store;
+mod local_repos;
 mod profile;
 mod repo;
 mod repo_list;
@@ -9,6 +10,7 @@ use std::path::{Path, PathBuf};
 pub use backend::{Backend, BackendEvent};
 pub use git_store::GitStore;
 use gpui::{App, AppContext, Entity};
+pub use local_repos::LocalReposStore;
 pub use nostr_sdk::prelude::Timestamp;
 pub use profile::{Profile, ProfileStore};
 pub use repo::RepoStore;
@@ -16,8 +18,15 @@ pub use repo_list::{RepoActivityCounts, RepoListStore};
 use signed_nostr::new_backend;
 pub use utils::shorten_pubkey;
 
-/// Initialize the backend and stores, and install them as globals. Call once
-/// at startup, before opening any window that uses the stores.
+/// The default directories scanned for local git repositories
+/// on every platform: the user's Desktop and Documents folders.
+#[cfg(not(target_arch = "wasm32"))]
+fn default_scan_paths() -> Vec<PathBuf> {
+    vec![paths::desktop_dir(), paths::documents_dir()]
+}
+
+/// Initialize the backend and stores, and install them as globals.
+/// Call once at startup, before opening any window that uses the stores.
 #[cfg(not(target_arch = "wasm32"))]
 pub fn init(db_path: impl AsRef<Path>, cx: &mut App) -> Entity<Backend> {
     // rustls uses the `aws_lc_rs` provider by default; ignore if already installed.
@@ -25,46 +34,64 @@ pub fn init(db_path: impl AsRef<Path>, cx: &mut App) -> Entity<Backend> {
         .install_default()
         .ok();
 
-    let path = db_path.as_ref().to_path_buf();
+    // Initialize the nostr client and universal signer.
     let (client, signer) = cx.foreground_executor().block_on(async move {
+        let path = db_path.as_ref().to_path_buf();
         new_backend(path)
             .await
             .expect("failed to initialize nostr backend")
     });
 
+    // Initialize the backend and stores.
     let entity = cx.new(|cx| Backend::new(client, signer, cx));
     Backend::set_global(entity.clone(), cx);
 
+    // Initialize the profile store.
     ProfileStore::set_global(cx.new(ProfileStore::new), cx);
 
-    // Start the explore list from the local database before the first
-    // window opens; relay syncs continue in the background, so the list
-    // never waits for them.
+    // Start the explore list from the local database before
+    // the first window opens, relay syncs continue in the background,
+    // so the list never waits for them.
     RepoListStore::set_global(cx.new(|cx| RepoListStore::new(None, cx)), cx);
 
-    // The clone cache is only meaningful on native platforms; the wasm
-    // build registers an empty store so `GitStore::global` still works.
+    // The clone cache is only meaningful on native platforms,
+    // the wasm build registers an empty store so `GitStore::global` still works.
     GitStore::set_global(PathBuf::new(), cx);
 
+    // Scan the default directories (Desktop, Documents) for local git
+    // repositories; the sidebar lists them next to the user's NIP-34 repos.
+    LocalReposStore::set_global(
+        cx.new(|cx| LocalReposStore::new(default_scan_paths(), cx)),
+        cx,
+    );
+
     entity
 }
 
 /// Initialize the backend with an in-memory database on wasm.
 #[cfg(target_arch = "wasm32")]
 pub fn init(cx: &mut App) -> Entity<Backend> {
+    // Initialize the nostr client and universal signer.
     let (client, signer) = new_backend().expect("failed to initialize nostr backend");
 
+    // Initialize the backend and stores.
     let entity = cx.new(|cx| Backend::new(client, signer, cx));
     Backend::set_global(entity.clone(), cx);
 
+    // Initialize the profile store.
     ProfileStore::set_global(cx.new(ProfileStore::new), cx);
 
-    // Start the explore list from the local database before the first
-    // window opens; relay syncs continue in the background, so the list
-    // never waits for them.
+    // Start the explore list from the local database before
+    // the first window opens, relay syncs continue in the background,
+    // so the list never waits for them.
     RepoListStore::set_global(cx.new(|cx| RepoListStore::new(None, cx)), cx);
 
+    // The clone cache is only meaningful on native platforms,
+    // the wasm build registers an empty store so `GitStore::global` still works.
     GitStore::set_global(PathBuf::new(), cx);
 
+    // No filesystem scan on wasm: there are no local git repositories.
+    LocalReposStore::set_global(cx.new(|cx| LocalReposStore::new(Vec::new(), cx)), cx);
+
     entity
 }