1 files changed, 41 insertions, 0 deletions
diff --git a/devtools/shared/compatibility/bin/update.js b/devtools/shared/compatibility/bin/update.js
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+++ b/devtools/shared/compatibility/bin/update.js
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+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */
+
+// The Compatibility panel detects issues by comparing against official MDN compatibility data
+// at https://github.com/mdn/browser-compat-data). It uses a local snapshot of the dataset.
+// This dataset needs to be manually synchronized periodically
+
+// The subsets from the dataset required by the Compatibility panel are:
+// * browsers: https://github.com/mdn/browser-compat-data/tree/master/browsers
+// * css.properties: https://github.com/mdn/browser-compat-data/tree/master/css
+
+// The MDN compatibility data is available as a node package ("@mdn/browser-compat-data").
+// This node script downloads `browsers.json` and `css-properties.json` and updates the relevant files.
+
+/* global __dirname */
+
+"use strict";
+
+const compatData = require("@mdn/browser-compat-data");
+exportData(compatData.css.properties, "css-properties.json");
+exportData(compatData.browsers, "browsers.json");
+
+function exportData(data, fileName) {
+  const fs = require("fs");
+  const path = require("path");
+
+  const content = `${JSON.stringify(data)}`;
+
+  fs.writeFile(
+    path.resolve(__dirname, "../dataset", fileName),
+    content,
+    err => {
+      if (err) {
+        console.error(err);
+      } else {
+        console.log(`${fileName} downloaded`);
+      }
+    }
+  );
+}