From e01b46b30a8dbd766ddc9fca1644c3e2e2c0464a Mon Sep 17 00:00:00 2001
From: Hare <kei.hiracchi.0928@gmail.com>
Date: Tue, 1 Sep 2026 09:33:47 +0900
Subject: [PATCH] chore: shard Cargo build cache by workspace

---
 .cargo/config.toml | 5 +----
 devshell.nix       | 5 ++++-
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/.cargo/config.toml b/.cargo/config.toml
index aa565446..2e2fd2b5 100644
--- a/.cargo/config.toml
+++ b/.cargo/config.toml
@@ -1,6 +1,3 @@
-# Keep intermediate build artifacts outside individual worktrees and reuse them
-# across parallel development of this repository. Final artifacts remain in each
-# worktree's target directory.
 [build]
-build-dir = "{cargo-cache-home}/build/yoi"
+build-dir = "{cargo-cache-home}/build/{workspace-path-hash}"
 incremental = false
diff --git a/devshell.nix b/devshell.nix
index adb473da..db8ec581 100644
--- a/devshell.nix
+++ b/devshell.nix
@@ -8,13 +8,16 @@ pkgs.mkShell {
     cargo
     pkgs.sccache
   ];
-  RUSTC_WRAPPER = "${pkgs.sccache}/bin/sccache";
+
   # sccache is additive to Cargo's shared build-dir, so keep its disk usage bounded.
+  RUSTC_WRAPPER = "${pkgs.sccache}/bin/sccache";
   SCCACHE_CACHE_SIZE = "5G";
+
   buildInputs = with pkgs; [
     pkg-config
     openssl
   ];
+
   shellHook = ''
     if repo_root="$(git rev-parse --show-toplevel 2>/dev/null)"; then
       : # export YOI_POD_RUNTIME_COMMAND="$repo_root/target/debug/yoi"