Use git submodule to reference Matter SDK

Use git submodule to reference the Matter SDK git repository instead of
explicit references in the GitHub Action. This allows to use Dependabot
to automatically update the SDK.

The main aim is to support nightly builds for wheels builds.

Author: agners

.github/workflows/build.yaml

@@ -2,9 +2,6 @@ name: CHIP wheels build
 
 on: push
 
-env:
-  matter_sdk_ref: v1.2.0.1
-
 jobs:
   build_prepare:
     name: Prepare build
@@ -16,6 +13,7 @@ jobs:
       - name: Checkout build repository
         uses: actions/checkout@v4
         with:
+          submodules: true
           fetch-depth: 0
       - name: Get version
         id: version
@@ -43,37 +41,32 @@ jobs:
           fi
           echo "Building version $version"
           echo "version=$version" >> "$GITHUB_OUTPUT"
-      - name: Checkout CHIP SDK repository
-        uses: actions/checkout@v4
-        with:
-          repository: project-chip/connectedhomeip
-          ref: ${{ env.matter_sdk_ref }}
-          path: ./project-chip
       - name: Checkout submodules
-        working-directory: ./project-chip
+        working-directory: ./connectedhomeip/
         run: scripts/checkout_submodules.py --shallow --platform linux
       - name: Apply patches
-        working-directory: ./project-chip
+        working-directory: ./connectedhomeip/
         run: |
           for patch in ../*.patch
           do
               echo "Applying ${patch}"
               patch -p1 < $patch
           done
       - name: Bootstrap
-        working-directory: ./project-chip
+        working-directory: ./connectedhomeip/
         run: bash scripts/bootstrap.sh -p all,linux
       - name: ZAP Code pre-generation
-        working-directory: ./project-chip
+        working-directory: ./connectedhomeip/
         run: scripts/run_in_build_env.sh "scripts/codepregen.py ./zzz_pregenerated/"
       - name: Create Matter SDK tar
-        working-directory: ./project-chip
-        run: tar -caf ../project-chip.tar.zst --exclude .environment --use-compress-program=zstdmt .
+        run: |
+          tar -caf ../connectedhomeip.tar.zst --exclude ./connectedhomeip/.environment --use-compress-program=zstdmt .
+          mv ../connectedhomeip.tar.zst ./connectedhomeip.tar.zst
       - name: Store Matter SDK as artifact
         uses: actions/upload-artifact@v4
         with:
           name: matter-sdk-${{ github.run_id }}
-          path: ./project-chip.tar.zst
+          path: ./connectedhomeip.tar.zst
 
   build_linux_python_lib:
     name: Build Python wheels for Linux (${{ matrix.arch.name }})
@@ -95,7 +88,7 @@ jobs:
 
     defaults:
       run:
-        working-directory: ./project-chip
+        working-directory: ./connectedhomeip/
 
     container:
       image: ${{ matrix.arch.container }}
@@ -112,13 +105,10 @@ jobs:
       - name: Extract Matter SDK from tar
         working-directory: ./
         run: |
-          rm -rf project-chip
-          mkdir -p project-chip
-          cd project-chip
           apt update && apt install zstd
-          tar -xaf ../project-chip.tar.zst --use-compress-program=zstdmt .
+          rm -rf connectedhomeip/
+          tar -xaf ./connectedhomeip.tar.zst --use-compress-program=zstdmt .
           git config --global --add safe.directory "*"
-          rm -rf out/
       - name: Bootstrap
         run: bash scripts/bootstrap.sh -p all,linux
       - name: Setup Build, Run Build and Run Tests
@@ -147,7 +137,7 @@ jobs:
         uses: actions/upload-artifact@v4
         with:
           name: chip-wheels-linux-${{ matrix.arch.name }}
-          path: project-chip/out/controller/python/*.whl
+          path: ./connectedhomeip/out/controller/python/*.whl
       - name: Upload wheels as release assets
         uses: softprops/action-gh-release@v1
         if: startsWith(github.ref, 'refs/tags/')
@@ -192,32 +182,27 @@ jobs:
 
     defaults:
       run:
-        working-directory: ./project-chip
+        working-directory: ./connectedhomeip/
 
     steps:
       - name: Checkout build repository
         uses: actions/checkout@v4
         with:
+          submodules: true
           fetch-depth: 0
-      - name: Checkout CHIP SDK repository
-        uses: actions/checkout@v4
-        with:
-          repository: project-chip/connectedhomeip
-          ref: ${{ env.matter_sdk_ref }}
-          path: ./project-chip
       - name: Checkout submodules
-        working-directory: ./project-chip
+        working-directory: ./connectedhomeip/
         run: scripts/checkout_submodules.py --shallow --platform darwin
       - name: Apply patches
-        working-directory: ./project-chip
+        working-directory: ./connectedhomeip/
         run: |
           for patch in ../*.patch
           do
               echo "Applying ${patch}"
               patch -p1 < $patch
           done
       - name: Bootstrap
-        working-directory: ./project-chip
+        working-directory: ./connectedhomeip/
         run: bash scripts/bootstrap.sh -p all,darwin
       - name: Setup Build, Run Build and Run Tests
         run: |
@@ -249,7 +234,7 @@ jobs:
         uses: softprops/action-gh-release@v1
         if: startsWith(github.ref, 'refs/tags/')
         with:
-          files: project-chip/out/controller/python/*.whl
+          files: connectedhomeip/out/controller/python/*.whl
       - name: Upload wheels to PyPI
         if: startsWith(github.ref, 'refs/tags/')
         env:

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "connectedhomeip"]
+	path = connectedhomeip
+	url = https://github.com/project-chip/connectedhomeip.git