fix zipping

.github/actions/build-extension/action.yml

@@ -62,14 +62,4 @@ runs:
       env:
         UPDATE_CHANNEL: ${{ inputs.update_channel }}
         BUILD_LABEL: ${{ inputs.build_label }}
-      run: |
+      run: node scripts/package-extension-zips.mjs "${{ steps.version.outputs.version }}"
-        VERSION="${{ steps.version.outputs.version }}"
-        if [ "$UPDATE_CHANNEL" = "nightly" ] && [ -n "$BUILD_LABEL" ]; then
-          BASE="betterseqtaplus-nightly-${BUILD_LABEL}"
-        else
-          BASE="betterseqtaplus-${VERSION}"
-        fi
-        tar -a -cf "dist/${BASE}-chrome.zip" -C dist/chrome .
-        tar -a -cf "dist/${BASE}-firefox.zip" -C dist/firefox .
-        echo "chrome_zip=dist/${BASE}-chrome.zip" >> "$GITHUB_OUTPUT"
-        echo "firefox_zip=dist/${BASE}-firefox.zip" >> "$GITHUB_OUTPUT"

scripts/package-extension-zips.mjs

@@ -0,0 +1,71 @@
+/**
+ * Package Chrome/Firefox build folders into zip files Windows Explorer can open.
+ * Git Bash `tar -a` on CI often produces zips that fail to unzip on Windows.
+ */
+import { execFileSync } from "node:child_process";
+import {
+  appendFileSync,
+  existsSync,
+  mkdirSync,
+  readFileSync,
+  unlinkSync,
+} from "node:fs";
+import { dirname, join } from "node:path";
+import { fileURLToPath } from "node:url";
+
+const root = join(dirname(fileURLToPath(import.meta.url)), "..");
+
+function zipDirectory(sourceRel, outRel) {
+  const sourceDir = join(root, sourceRel);
+  const outZip = join(root, outRel);
+
+  if (!existsSync(sourceDir)) {
+    throw new Error(`Missing build output: ${sourceRel}`);
+  }
+
+  mkdirSync(dirname(outZip), { recursive: true });
+  if (existsSync(outZip)) {
+    unlinkSync(outZip);
+  }
+
+  if (process.platform === "win32") {
+    const ps = [
+      "Add-Type -AssemblyName System.IO.Compression.FileSystem",
+      `[IO.Compression.ZipFile]::CreateFromDirectory('${sourceDir.replace(/'/g, "''")}', '${outZip.replace(/'/g, "''")}')`,
+    ].join("; ");
+    execFileSync("powershell", ["-NoProfile", "-Command", ps], {
+      stdio: "inherit",
+    });
+  } else {
+    execFileSync("zip", ["-r", "-q", outZip, "."], {
+      cwd: sourceDir,
+      stdio: "inherit",
+    });
+  }
+}
+
+const pkg = JSON.parse(readFileSync(join(root, "package.json"), "utf8"));
+const version = process.argv[2] || pkg.version;
+const updateChannel = process.env.UPDATE_CHANNEL || "stable";
+const buildLabel = process.env.BUILD_LABEL || "";
+
+const base =
+  updateChannel === "nightly" && buildLabel
+    ? `betterseqtaplus-nightly-${buildLabel}`
+    : `betterseqtaplus-${version}`;
+
+const chromeZip = `dist/${base}-chrome.zip`;
+const firefoxZip = `dist/${base}-firefox.zip`;
+
+zipDirectory("dist/chrome", chromeZip);
+zipDirectory("dist/firefox", firefoxZip);
+
+console.log(`Packaged ${chromeZip}`);
+console.log(`Packaged ${firefoxZip}`);
+
+if (process.env.GITHUB_OUTPUT) {
+  appendFileSync(
+    process.env.GITHUB_OUTPUT,
+    `chrome_zip=${chromeZip}\nfirefox_zip=${firefoxZip}\n`,
+  );
+}