refactor git cache

crates/paths/src/lib.rs

@@ -90,9 +90,13 @@ pub fn nostr_dir() -> &'static PathBuf {
 }
 
 /// Returns the path to the local git clone cache, the grasp mirrors.
+///
+/// The mirrors are disposable and re-cloned from their grasp server on
+/// demand, so the cache lives in the OS temp directory for the system to
+/// reclaim.
 pub fn repos_dir() -> &'static PathBuf {
     static REPOS_DIR: OnceLock<PathBuf> = OnceLock::new();
-    REPOS_DIR.get_or_init(|| data_dir().join("repos"))
+    REPOS_DIR.get_or_init(|| std::env::temp_dir().join(APP_NAME_LOWERCASE).join("repos"))
 }
 
 pub fn settings_file() -> &'static PathBuf {

crates/signed_state/src/backend.rs

@@ -13,7 +13,7 @@ use nostr_sdk::prelude::*;
 use signed_core::{Announcement, RepoAddr, build_state, filters, identifier_from_name};
 use signed_nostr::{SignedAuthUrlHandler, UniversalSigner, Update};
 
-use crate::git_store::GitStore;
+use crate::git_store::git_cache;
 use crate::inbox::Inbox;
 use crate::repos::RepoListStore;
 
@@ -756,7 +756,7 @@ impl Backend {
         announcement: Announcement,
         cx: &mut Context<Self>,
     ) -> Task<Result<PushOutcome, Error>> {
-        let cache = GitStore::global(cx).cache().clone();
+        let cache = git_cache();
         let path = cache.repo_path(&announcement.addr());
         self.push_repo_from(announcement, path, None, cx)
     }

crates/signed_state/src/checkouts.rs

@@ -9,7 +9,7 @@ use settings::{CheckoutRecord, SettingsStore};
 use signed_core::{Announcement, RepoAddr};
 
 use crate::backend::{Backend, BackendEvent};
-use crate::git_store::GitStore;
+use crate::git_store::git_cache;
 use crate::refresh::{RefreshGate, RefreshRequest};
 use crate::repos::{LocalReposStore, RepoListStore};
 
@@ -328,7 +328,7 @@ impl CheckoutsStore {
 
         let announcements = RepoListStore::global(cx).read(cx).announcements.clone();
         let scanned = LocalReposStore::global(cx).read(cx).repos.clone();
-        let cache_root = GitStore::global(cx).cache().root().canonicalize().ok();
+        let cache_root = git_cache().root().canonicalize().ok();
 
         let requested: Vec<(RepoAddr, Option<String>)> = self
             .status_requested

crates/signed_state/src/git_store.rs

@@ -1,32 +1,19 @@
 use std::path::PathBuf;
+use std::sync::OnceLock;
 
-use gpui::{App, Global};
 use signed_git::GitCache;
 
-struct GlobalGitStore(GitCache);
-
-impl Global for GlobalGitStore {}
+static GIT_CACHE: OnceLock<GitCache> = OnceLock::new();
 
 /// Global access to the on-disk git clone cache, the grasp mirrors.
-#[derive(Debug, Clone)]
-pub struct GitStore(GitCache);
+pub fn git_cache() -> &'static GitCache {
+    GIT_CACHE
+        .get()
+        .expect("git cache is initialized by signed_state::init")
+}
 
-impl GitStore {
-    pub fn set_global(root: impl Into<PathBuf>, cx: &mut App) -> Self {
-        let store = Self::new(root);
-        cx.set_global(GlobalGitStore(store.0.clone()));
-        store
-    }
-
-    pub fn global(cx: &App) -> Self {
-        Self(cx.global::<GlobalGitStore>().0.clone())
-    }
-
-    fn new(root: impl Into<PathBuf>) -> Self {
-        Self(GitCache::new(root.into()))
-    }
-
-    pub fn cache(&self) -> &GitCache {
-        &self.0
+pub(crate) fn set_git_cache(root: impl Into<PathBuf>) {
+    if GIT_CACHE.set(GitCache::new(root.into())).is_err() {
+        log::warn!("git cache root is already set, keeping the first one");
     }
 }

crates/signed_state/src/lib.rs

@@ -11,7 +11,8 @@ use std::path::{Path, PathBuf};
 
 pub use backend::{Backend, BackendEvent, user_grasp_list_servers};
 pub use checkouts::{CheckoutStatus, CheckoutsStore, pr_proposes_checkout};
-pub use git_store::GitStore;
+pub use git_store::git_cache;
+use git_store::set_git_cache;
 use gpui::{App, AppContext};
 pub use inbox::{Inbox, query_inbox};
 pub use nostr_sdk::prelude::Timestamp;
@@ -31,6 +32,7 @@ pub fn init(
     // rustls uses the `aws_lc_rs` provider by default.
     let _ = rustls::crypto::aws_lc_rs::default_provider().install_default();
 
+    // Initialize the nostr client and signer
     let (client, signer) = cx.foreground_executor().block_on(async move {
         let path = db_path.as_ref().to_path_buf();
         new_backend(path)
@@ -38,11 +40,22 @@ pub fn init(
             .expect("failed to initialize nostr backend")
     });
 
+    // Set Git cache for the repos root
+    set_git_cache(repos_root);
+
+    // Set global stores for the backend
     Backend::set_global(cx.new(|cx| Backend::new(client, signer, cx)), cx);
+
+    // Set global stores for the profile
     ProfileStore::set_global(cx.new(ProfileStore::new), cx);
+
+    // Set global stores for the repo list and local repos
     RepoListStore::set_global(cx.new(RepoListStore::new), cx);
-    GitStore::set_global(repos_root, cx);
+
+    // Set global stores for the local repos
     LocalReposStore::set_global(cx.new(|cx| LocalReposStore::new(scan_paths, cx)), cx);
+
+    // Set global stores for the checkouts
     CheckoutsStore::set_global(cx.new(CheckoutsStore::new), cx);
 }
 
@@ -50,10 +63,10 @@ pub fn init(
 #[cfg(target_arch = "wasm32")]
 pub fn init(cx: &mut App) {
     let (client, signer) = new_backend().expect("failed to initialize nostr backend");
+    set_git_cache(PathBuf::new());
     Backend::set_global(cx.new(|cx| Backend::new(client, signer, cx)), cx);
     ProfileStore::set_global(cx.new(ProfileStore::new), cx);
     RepoListStore::set_global(cx.new(RepoListStore::new), cx);
-    GitStore::set_global(PathBuf::new(), cx);
     LocalReposStore::set_global(cx.new(|cx| LocalReposStore::new(Vec::new(), cx)), cx);
     CheckoutsStore::set_global(cx.new(|cx| CheckoutsStore::new(cx)), cx);
 }

crates/signed_state/src/repo.rs

@@ -17,7 +17,7 @@ use crate::backend::{
     user_grasp_list_servers,
 };
 use crate::checkouts::CheckoutsStore;
-use crate::git_store::GitStore;
+use crate::git_store::git_cache;
 use crate::refresh::{RefreshGate, RefreshRequest};
 use crate::repos::RepoListStore;
 
@@ -1196,7 +1196,7 @@ impl RepoStore {
             return;
         }
 
-        let cache = GitStore::global(cx).cache().clone();
+        let cache = git_cache();
 
         let clone_urls: Vec<Url> = self
             .announcement

crates/workspace/src/views/pull_requests/detail.rs

@@ -26,7 +26,7 @@ use signed_core::{
     merge_base_of, pull_request_patch,
 };
 use signed_git::{FileCommit, patch_commits, patch_diffs};
-use signed_state::{Backend, GitStore, ProfileStore, RepoStore};
+use signed_state::{Backend, ProfileStore, RepoStore, git_cache};
 use signed_ui::{CountBadge, UserAvatar, placeholder, status_badge};
 use utils::{relative_time, relative_time_secs};
 
@@ -217,7 +217,7 @@ impl PullRequestDetailView {
         self.current_commit = binding.tip.clone().map(SharedString::from);
         cx.notify();
 
-        let cache = GitStore::global(cx).cache().clone();
+        let cache = git_cache();
 
         self.load_generation = self.load_generation.wrapping_add(1);
         let generation = self.load_generation;

crates/workspace/src/views/pull_requests/new.rs

@@ -26,7 +26,7 @@ use signed_git::{
     delete_refs_with_prefix, fetch_repo_refs, fork_namespace, merge_base, refs_with_prefix,
     worktree_commit_range_commits, worktree_commit_range_diff,
 };
-use signed_state::{Backend, CheckoutsStore, GitStore, RepoListStore, RepoStore};
+use signed_state::{Backend, CheckoutsStore, RepoListStore, RepoStore, git_cache};
 use signed_ui::{CountBadge, placeholder, ref_selector_trigger};
 
 use crate::views::commit_diff::{COMMIT_ROW_HEIGHT, CommitDiffView, DiffPane, commit_row};
@@ -533,7 +533,7 @@ impl NewPullRequestView {
         let Some((base, _euc)) = self.base_repo(cx) else {
             return;
         };
-        let cache = GitStore::global(cx).cache().clone();
+        let cache = git_cache();
         let mirror_path = cache.repo_path(&base);
         let namespace = fork_namespace(&announcement);
         let clone_urls = announcement.clone.clone();

crates/workspace/src/views/repo/mod.rs

@@ -26,8 +26,8 @@ use nostr::prelude::{RelayUrl, ToBech32, Url};
 use signed_core::{Announcement, RepoAddr, RepoStatus};
 use signed_git::FileCommit;
 use signed_state::{
-    Backend, CheckoutStatus, CheckoutsStore, GitStore, LocalReposStore, ProfileStore,
-    RepoListStore, RepoStore, pr_proposes_checkout,
+    Backend, CheckoutStatus, CheckoutsStore, LocalReposStore, ProfileStore, RepoListStore,
+    RepoStore, git_cache, pr_proposes_checkout,
 };
 use signed_ui::{
     CountBadge, DropdownButton, PixelAvatar, UserAvatar, copy_row, menu_copy_row, middle_truncate,
@@ -343,7 +343,7 @@ impl RepoDetailView {
 
         self.repo_started = true;
 
-        let cache = GitStore::global(cx).cache().clone();
+        let cache = git_cache();
         let addr = announcement.addr();
         let clone_urls: Vec<Url> = announcement.clone.clone();