Add workflow

.github/workflows/release-python-runtime.yml

@@ -0,0 +1,50 @@
+name: Build Python Runtime
+
+on:
+    workflow_dispatch:
+    pull_request:
+
+jobs:
+  version:
+    outputs:
+      version: ${{ steps.echo.outputs.version }}
+    # version job uses ubuntu 24.04, this way we don't have to install the updated clang while
+    # the build job uses 20.04 for libc compatibility.
+    runs-on: ubuntu-24.04
+    steps:
+      - uses: actions/checkout@v4
+      - id: echo
+        run: |
+          echo "::set-output name=version::1.$(cat src/workerd/io/supported-compatibility-date.txt | tr -d '-').0"
+
+  build:
+    runs-on: ubuntu-20.04
+    name: build Python runtime
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          show-progress: false
+      - name: Setup Linux
+        if: runner.os == 'Linux'
+        run: |
+          export DEBIAN_FRONTEND=noninteractive
+          wget https://apt.llvm.org/llvm.sh
+          sed -i '/apt-get install/d' llvm.sh
+          chmod +x llvm.sh
+          sudo ./llvm.sh 15
+          sudo apt-get install -y --no-install-recommends clang-15 lld-15 libunwind-15 libc++abi1-15 libc++1-15 libc++-15-dev
+          echo "build:linux --action_env=CC=/usr/lib/llvm-15/bin/clang --action_env=CXX=/usr/lib/llvm-15/bin/clang++" >> .bazelrc
+          echo "build:linux --host_action_env=CC=/usr/lib/llvm-15/bin/clang --host_action_env=CXX=/usr/lib/llvm-15/bin/clang++" >> .bazelrc
+      - name: Configure download mirrors
+        shell: bash
+        run: |
+          if [ ! -z "${{ secrets.WORKERS_MIRROR_URL }}" ] ; then
+            # Strip comment in front of WORKERS_MIRROR_URL, then substitute secret to use it.
+            sed -e '/WORKERS_MIRROR_URL/ { s@# *@@; s@WORKERS_MIRROR_URL@${{ secrets.WORKERS_MIRROR_URL }}@; }' -i.bak WORKSPACE
+          fi
+      - name: Bazel build
+        # Strip debug info here – we don't generate debug info but some is pulled in from external
+        # static libraries, for example the Rust STL. This is equivalent to the -Wl,-S linker
+        # option, symbols will not be removed.
+        run: |
+          bazelisk build --config=release_linux //src/pyodide:pyodide.capnp.bin@rule

src/pyodide/BUILD.bazel

@@ -191,7 +191,7 @@ genrule(
         "eval",
         "$(location :pyodide.capnp)",
         "pyodideBundle",
-        "-I external/workerd/src/",
+        "-I src/",
         "-o binary",
         "> $@",
     ])