Add .yml to dockerfile workflow.

Modify to be consistent with existing workflow pattern

Author: 123R3N321

.github/workflows/libcpp-header-integration.yml

@@ -1,72 +1,57 @@
-name: libcpp header integration
+name: libcpp integration
 
 on:
   workflow_dispatch:
   push:
 
 jobs:
-  libcpp-integration-test:
+  docker:
     runs-on: ubuntu-latest
-    timeout-minutes: 60
-
     env:
-      PROJECT_ROOT: ${{ github.workspace }}
+      OUTPUT_LOCAL_DIR: libcpp-output
+      STATUS_FILE: libcpp_status
+      WASM_FILE_NAME: hello.wasm
 
     steps:
-      - name: Check out repository
-        uses: actions/checkout@v4
-
-      - name: Show workspace info
-        run: |
-          echo "GITHUB_WORKSPACE=$GITHUB_WORKSPACE"
-          pwd
-          ls -la
-          test -f Makefile
-
-      - name: Build sysroot
-        working-directory: ${{ env.PROJECT_ROOT }}
-        run: |
-          make lind-boot
-          make sysroot
-
-      - name: Integrate libcpp headers and libraries into sysroot
-        working-directory: ${{ env.PROJECT_ROOT }}
-        run: |
-          set -euxo pipefail
-
-          mkdir -p build/sysroot/include/wasm32-wasi
-          mkdir -p build/sysroot/lib/wasm32-wasi
-
-          cp -r artifacts/include/wasm32-wasi/. build/sysroot/include/wasm32-wasi/
-          cp -r artifacts/lib/wasm32-wasi/. build/sysroot/lib/wasm32-wasi/
-
-          echo "Integrated include tree:"
-          find build/sysroot/include/wasm32-wasi -maxdepth 2 | head -100
-
-          echo "Integrated lib tree:"
-          find build/sysroot/lib/wasm32-wasi -maxdepth 2 | head -100
-
-      - name: Ensure compiler script is executable
-        run: chmod +x scripts/lind_compile_cpp
-
-      - name: Compile C++ test to wasm
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@4d04d5d9486b7bd6fa91e7baf45bbb4f8b9deedd
+
+      - name: Build libcpp integration image
+        id: build_libcpp
+        uses: docker/build-push-action@d08e5c354a6adb9ed34480a06d141179aa583294
+        with:
+          platforms: linux/amd64
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+          file: Docker/Dockerfile.libcpp
+          tags: libcpp-integration:latest
+          outputs: type=local,dest=${{ env.OUTPUT_LOCAL_DIR }}
+
+      - name: Read libcpp status
+        id: libcpp
         run: |
-          set -euxo pipefail
-          rm -f trial/*.wasm
-          scripts/lind_compile_cpp trial/hello.cpp
+          STATUS_PATH="${{ env.OUTPUT_LOCAL_DIR }}/${{ env.STATUS_FILE }}"
+          echo "Checking status file at: $STATUS_PATH"
+          if [[ -f "$STATUS_PATH" ]]; then
+            cat "$STATUS_PATH"
+            cat "$STATUS_PATH" >> "$GITHUB_OUTPUT"
+            cat "$STATUS_PATH" >> "$GITHUB_ENV"
+          else
+            echo "LIBCPP_STATUS=fail" >> "$GITHUB_OUTPUT"
+            echo "LIBCPP_STATUS=fail" >> "$GITHUB_ENV"
+            echo "::warning file=$STATUS_PATH::Status file missing, defaulting to fail"
+          fi
 
-          echo "Contents of trial/:"
-          ls -la trial
+      - name: Upload wasm artifact
+        uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f
+        with:
+          name: libcpp-wasm
+          path: ${{ env.OUTPUT_LOCAL_DIR }}/${{ env.WASM_FILE_NAME }}
+          if-no-files-found: error
+          retention-days: 7
 
-      - name: Verify wasm output exists
+      - name: Fail if integration failed
+        if: steps.libcpp.outputs.LIBCPP_STATUS == 'fail'
         run: |
-          set -euxo pipefail
-
-          wasm_file="$(find trial -maxdepth 1 -type f -name '*.wasm' | head -n 1)"
-
-          if [ -z "$wasm_file" ]; then
-            echo "Expected a .wasm output in trial/, but none was found."
-            exit 1
-          fi
-
-          echo "Found wasm output: $wasm_file"
+          echo "libcpp integration test failed."
+          exit 1

Docker/Dockerfile.libcpp

@@ -0,0 +1,24 @@
+# Reuse the same base/build logic style as Dockerfile.e2e
+
+FROM base AS build-libcpp
+
+COPY . .
+
+RUN make sysroot
+
+RUN mkdir -p build/sysroot/include/wasm32-wasi \
+    && mkdir -p build/sysroot/lib/wasm32-wasi \
+    && cp -r artifacts/include/wasm32-wasi/. build/sysroot/include/wasm32-wasi/ \
+    && cp -r artifacts/lib/wasm32-wasi/. build/sysroot/lib/wasm32-wasi/
+
+RUN chmod +x scripts/lind_compile_cpp \
+    && rm -f trial/*.wasm \
+    && scripts/lind_compile_cpp trial/hello.cpp \
+    && test -n "$(find trial -maxdepth 1 -type f -name '*.wasm' | head -n 1)"
+
+RUN mkdir -p /out \
+    && cp "$(find trial -maxdepth 1 -type f -name '*.wasm' | head -n 1)" /out/hello.wasm \
+    && printf '%s\n' 'LIBCPP_STATUS=pass' > /out/libcpp_status
+
+FROM scratch
+COPY --from=build-libcpp /out/ /