Upload full logs on CI failure (#42)

* Upload full logs on CI failure

* Use a unique artifact name and set retention period

Author: ksperling-apple

.config.ci

@@ -1,6 +1,7 @@
 CONFIG_ALL=n
 CONFIG_AUTOREMOVE=n
 CONFIG_AUTOREBUILD=n
+CONFIG_BUILD_LOG=y
 CONFIG_MBEDTLS_CCM_C=y
 CONFIG_PACKAGE_matter-netman-mbedtls=m
 CONFIG_PACKAGE_matter-netman-openssl=m

.github/workflows/build-packages.yaml

@@ -11,14 +11,19 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v3
 
+      - name: Prepare log directory
+        run: |
+          mkdir -p ${{ runner.temp }}/logs
+          chmod 0777 ${{ runner.temp }}/logs
+
       # Run only the build step in the container rather than the whole job, because the UID of the
       # buildbot user (1000) that owns the OpenWrt SDK files in /builder doesn't match the UID of
       # the GitHub runner user (1001), causing file system permission issues.
       - name: Build
         uses: addnab/docker-run-action@v3
         with:
           image: ghcr.io/project-chip/matter-openwrt-build:25.12.4
-          options: --volume ${{ github.workspace }}:/workspace
+          options: --volume ${{ github.workspace }}:/workspace --volume ${{ runner.temp }}/logs:/builder/logs
           shell: bash
           run: |
             set -x
@@ -40,3 +45,12 @@ jobs:
               echo "ERROR: Some packages failed to build: ${failed[*]}"
               exit 2
             fi
+
+      - name: Upload build logs
+        if: failure()
+        uses: actions/upload-artifact@v7
+        with:
+          name: build-logs-${{ github.run_id }}-${{ github.run_attempt }}
+          path: ${{ runner.temp }}/logs
+          if-no-files-found: ignore
+          retention-days: 14