Establish v2 spec nightly metadata on GitHub Pages deployment

.github/workflows/build.yml

@@ -1,4 +1,4 @@
-name: Build Cross-build environment for pyodide-build
+name: Build
 
 on:
   pull_request:
@@ -26,7 +26,7 @@ jobs:
   build:
     permissions:
       contents: read
-    name: Build cross-build environment for Pyodide
+    name: Build xbuildenv
     uses: ./.github/workflows/build-xbuildenv.yml
     with:
       branch: ${{ github.event.inputs.branch || 'main' }}

.github/workflows/pages.yml

@@ -0,0 +1,52 @@
+name: Deploy nightly environments metadata to GitHub Pages
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - "nightly-cross-build-environments.json"
+  workflow_dispatch:
+
+permissions: {}
+
+concurrency:
+  group: pages
+  cancel-in-progress: false
+
+jobs:
+  build:
+    name: Build GitHub Pages artifacts
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+        with:
+          persist-credentials: false
+
+      - uses: actions/configure-pages@983d7736d9b0ae728b81ab479565c72886d7745b # v5.0.0
+
+      # We don't actually have a v1 API here, just that we do it to be in line with the
+      # non-nightly metadata in the pyodide/pyodide GitHub Pages job/site
+      - name: Prepare GitHub Pages content
+        run: |
+          mkdir -p _site/api/v2
+          cp nightly-cross-build-environments.json _site/api/v2
+
+      - uses: actions/upload-pages-artifact@56afc609e74202658d3ffba0e8f6dda462b719fa # v3.0.1
+        with:
+          path: _site
+
+  deploy:
+    name: Deploy to GitHub Pages
+    runs-on: ubuntu-latest
+    needs: [build]
+    permissions:
+      pages: write # Required to deploy to GitHub Pages
+      id-token: write # Required for OIDC token used by the deploy-pages action
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}/api/v2/nightly-cross-build-environments.json
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@d6db90164ac5ed86f2b6aed7e0febac5b3c0c03e # v4.0.5

.github/workflows/publish.yml

@@ -112,3 +112,27 @@ jobs:
           tag_name: ${{ steps.release_version.outputs.release_version }}
           fail_on_unmatched_files: true
           name: ${{ steps.release_version.outputs.release_version }}
+
+      - uses: astral-sh/setup-uv@08807647e7069bb48b6ef5acd8ec9567f424441b # v8.1.0
+        with:
+          enable-cache: false
+
+      - name: Update cross-build environments metadata
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          VERSION: ${{ steps.release_version.outputs.release_version }}
+        run: uv run tools/update_nightly_cross_build_releases.py "$VERSION"
+
+      - name: Commit and push metadata updates
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          VERSION: ${{ steps.release_version.outputs.release_version }}
+        run: |
+          gh auth setup-git
+
+          git config user.name "github-actions[bot]"
+          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
+
+          git add nightly-cross-build-environments.json
+          git commit -m "Scheduled update for nightly  ${VERSION} xbuildenvs metadata [skip ci]"
+          git push origin main