[Build][CI] enable ccache for CIBW on Linux

Author: XuehaiPan

.github/workflows/dist.yml

@@ -124,9 +124,7 @@ jobs:
           fetch-depth: 1
           submodules: recursive
 
-      # NB: CIBW builds wheels in containers on Linux
-      - name: Setup ccache (macOS only)
-        if: runner.os == 'macOS'
+      - name: Setup ccache
         uses: hendrikmuhs/ccache-action@v1
         with:
           create-symlink: true

pyproject.toml

@@ -186,7 +186,9 @@ test-command = [
 ]
 
 [tool.cibuildwheel.linux]
-environment = { PYTHONDEVMODE = "1", PYTHONUNBUFFERED = "1", PATH = "/usr/local/cuda/bin:$PATH" }
+environment.PYTHONDEVMODE = "1"
+environment.PYTHONUNBUFFERED = "1"
+environment.PATH = "/usr/local/cuda/bin:/host/usr/lib/ccache:/host/usr/local/opt/ccache/libexec:$PATH"
 repair-wheel-command = [
     "auditwheel -v repair --exclude libtvm_ffi.so --exclude libcuda.so.1 --exclude '/usr/local/cuda*' -w {dest_dir} {wheel}",
     "pipx run abi3audit --verbose --strict {wheel}",