From d2fbcd07b752e1ec0857bc8f79d11a641ef77b5f Mon Sep 17 00:00:00 2001
From: LoveSy <shana@zju.edu.cn>
Date: Thu, 8 Jun 2023 11:28:00 +0800
Subject: [PATCH] Use sccache on non CI env

---
 .github/workflows/build.yml | 3 ---
 build.py                    | 5 +++++
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 1da287769..20f9fac1f 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -24,10 +24,7 @@ jobs:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
     env:
-      NDK_CCACHE: sccache
-      RUSTC_WRAPPER: sccache
       SCCACHE_GHA_ENABLED: true
-      CARGO_INCREMENTAL: 0
 
     steps:
       - name: Check out
diff --git a/build.py b/build.py
index 8343b383b..a89beae8f 100755
--- a/build.py
+++ b/build.py
@@ -59,6 +59,11 @@ if not sys.version_info >= (3, 8):
 if "ANDROID_SDK_ROOT" not in os.environ:
     error("Please set Android SDK path to environment variable ANDROID_SDK_ROOT!")
 
+if shutil.which("sccache") is not None:
+    os.environ["RUSTC_WRAPPER"] = "sccache"
+    os.environ["NDK_CCACHE"] = "sccache"
+    os.environ["CARGO_INCREMENTAL"] = "0"
+
 cpu_count = multiprocessing.cpu_count()
 os_name = platform.system().lower()