refactor: move WASM build to dedicated release job (#675)

realised this during the last release - it doesn't make sense to build
wasm inside of `publish`. we now test & build it as just another target
in `release` and upload `pgls.js` and `pgls.wasm` as GitHub release
artefacts.

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: psteinroe

.github/workflows/publish.yml

@@ -95,21 +95,12 @@ jobs:
             exit 1
           fi
 
-      - name: Install Nix
-        uses: DeterminateSystems/nix-installer-action@main
-
-      - name: Setup Magic Nix Cache
-        uses: DeterminateSystems/magic-nix-cache-action@main
-
       - name: Setup Bun
         uses: oven-sh/setup-bun@v2
 
       - name: Install dependencies
         run: bun install
 
-      - name: Build WASM Package
-        run: nix develop --command bash -c "cd packages/@postgres-language-server/wasm && bun run build"
-
       - name: Generate Packages (deprecated)
         id: generate-packages-deprecated
         run: node packages/@postgrestools/postgrestools/scripts/generate-packages.mjs
@@ -126,6 +117,10 @@ jobs:
           RELEASE_TAG: ${{ github.event_name == 'workflow_dispatch' && inputs.release_tag || github.event.release.tag_name }}
           PRERELEASE: ${{ github.event_name == 'workflow_dispatch' && needs.validate_tag.outputs.is-prerelease || github.event.release.prerelease }}
 
+      - name: Build WASM TS
+        run: bun run build:ts
+        working-directory: packages/@postgres-language-server/wasm
+
       - name: Publish npm packages as nightly (deprecated)
         if: (github.event_name == 'workflow_dispatch' && needs.validate_tag.outputs.is-prerelease == 'true') || (github.event_name == 'release' && github.event.release.prerelease)
         run: |

.github/workflows/release.yml

@@ -31,6 +31,50 @@ jobs:
         id: set_version
         run: echo "version=$(git cliff --bumped-version)" >> "$GITHUB_OUTPUT"
 
+  wasm:
+    name: Build & Test WASM
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: true
+
+      - name: Install Nix
+        uses: DeterminateSystems/nix-installer-action@main
+
+      - name: Setup Magic Nix Cache
+        uses: DeterminateSystems/magic-nix-cache-action@main
+
+      - uses: oven-sh/setup-bun@v2
+
+      - name: Install dependencies
+        run: bun install
+
+      - name: Build WASM
+        run: nix develop --command bash -c "bun run build"
+        working-directory: packages/@postgres-language-server/wasm
+
+      - name: Run Tests
+        run: bun test
+        working-directory: packages/@postgres-language-server/wasm
+
+      - name: Install Playwright
+        run: bun run test:e2e:install
+        working-directory: packages/@postgres-language-server/wasm
+
+      - name: Run E2E Tests
+        run: bun run test:e2e
+        working-directory: packages/@postgres-language-server/wasm
+
+      - name: Upload WASM Artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: wasm
+          path: |
+            packages/@postgres-language-server/wasm/wasm/pgls.js
+            packages/@postgres-language-server/wasm/wasm/pgls.wasm
+          if-no-files-found: error
+
   build_and_test:
     name: Build & Test for ${{ matrix.config.target }}
     needs: extract_version
@@ -144,7 +188,7 @@ jobs:
 
   create_changelog_and_release:
     runs-on: ubuntu-latest
-    needs: [extract_version, build_and_test] # make sure that tests & build work correctly
+    needs: [extract_version, build_and_test, wasm]
     steps:
       - name: Checkout Repo
         uses: actions/checkout@v4
@@ -181,6 +225,17 @@ jobs:
           merge-multiple: true
           pattern: postgres-language-server_*
 
+      - name: 👇 Download WASM Artifacts
+        uses: actions/download-artifact@v4
+        with:
+          name: wasm
+          path: wasm-assets
+
+      - name: Prepare WASM Assets
+        run: |
+          cp wasm-assets/packages/@postgres-language-server/wasm/wasm/pgls.js ./pgls.js
+          cp wasm-assets/packages/@postgres-language-server/wasm/wasm/pgls.wasm ./pgls.wasm
+
       - name: 📂 Create Release
         uses: softprops/action-gh-release@v2
         id: create-release
@@ -193,6 +248,8 @@ jobs:
           files: |
             postgrestools_*
             postgres-language-server_*
+            pgls.js
+            pgls.wasm
             docs/schema.json
           fail_on_unmatched_files: true
           draft: true

PLAN.md

@@ -62,6 +62,31 @@ async function downloadSchema(releaseTag, githubToken) {
 	console.log(`Downloaded schema for ${releaseTag}`);
 }
 
+async function downloadWasmAssets(releaseTag, githubToken) {
+	const wasmDir = resolve(PACKAGES_PGLS_ROOT, "wasm", "wasm");
+	fs.mkdirSync(wasmDir, { recursive: true });
+
+	for (const asset of ["pgls.js", "pgls.wasm"]) {
+		const assetUrl = `https://github.com/supabase-community/postgres-language-server/releases/download/${releaseTag}/${asset}`;
+
+		const response = await fetch(assetUrl.trim(), {
+			headers: {
+				Authorization: `token ${githubToken}`,
+				Accept: "application/octet-stream",
+			},
+		});
+
+		if (!response.ok) {
+			throw new Error(`Failed to Fetch WASM Asset from ${assetUrl}`);
+		}
+
+		const fileStream = fs.createWriteStream(resolve(wasmDir, asset));
+		await streamPipeline(response.body, fileStream);
+
+		console.log(`Downloaded WASM asset ${asset} for ${releaseTag}`);
+	}
+}
+
 async function downloadBinary(platform, arch, os, releaseTag, githubToken) {
 	const buildName = getBuildName(platform, arch);
 	const ext = getBinaryExt(os);
@@ -277,6 +302,7 @@ function getVersion(releaseTag, isPrerelease) {
 	const isPrerelease = process.env.PRERELEASE === "true";
 
 	await downloadSchema(releaseTag, githubToken);
+	await downloadWasmAssets(releaseTag, githubToken);
 	const version = getVersion(releaseTag, isPrerelease);
 	await writeManifest("cli", version);
 	await writeManifest("backend-jsonrpc", version);