1 files changed, 39 insertions, 0 deletions
diff --git a/devtools/shared/loader/loader-plugin-raw.sys.mjs b/devtools/shared/loader/loader-plugin-raw.sys.mjs
new file mode 100644
index 0000000000..1e645ad3be
--- /dev/null
+++ b/devtools/shared/loader/loader-plugin-raw.sys.mjs
@@ -0,0 +1,39 @@
+/* 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/. */
+
+import { NetUtil } from "resource://gre/modules/NetUtil.sys.mjs";
+
+/**
+ * A function that can be used as part of a require hook for a
+ * loader.js Loader.
+ * This function handles "raw!" and "theme-loader!" requires.
+ * See also: https://github.com/webpack/raw-loader.
+ */
+export const requireRawId = function (id, require) {
+  const index = id.indexOf("!");
+  const rawId = id.slice(index + 1);
+  let uri = require.resolve(rawId);
+  // If the original string did not end with ".js", then
+  // require.resolve might have added the suffix.  We don't want to
+  // add a suffix for a raw load (if needed the caller can specify it
+  // manually), so remove it here.
+  if (!id.endsWith(".js") && uri.endsWith(".js")) {
+    uri = uri.slice(0, -3);
+  }
+
+  const stream = NetUtil.newChannel({
+    uri: NetUtil.newURI(uri, "UTF-8"),
+    loadUsingSystemPrincipal: true,
+  }).open();
+
+  const count = stream.available();
+  const data = NetUtil.readInputStreamToString(stream, count, {
+    charset: "UTF-8",
+  });
+  stream.close();
+
+  // For the time being it doesn't seem worthwhile to cache the
+  // result here.
+  return data;
+};