servo: Merge #15584 - Move script lints to script_plugins (from nox:plugin); r=jdm

Source-Repo: https://github.com/servo/servo
Source-Revision: a099d27f99dadf3f7c26d997e43c1a12e0c5bd0e

servo/components/script_plugins/lib.rs

@@ -0,0 +1,48 @@
+/* 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/. */
+
+//! Servo's compiler plugin/macro crate
+//!
+//! Attributes this crate provides:
+//!
+//!  - `#[derive(DenyPublicFields)]` : Forces all fields in a struct/enum to be private
+//!  - `#[derive(JSTraceable)]` : Auto-derives an implementation of `JSTraceable` for a struct in the script crate
+//!  - `#[must_root]` : Prevents data of the marked type from being used on the stack.
+//!                     See the lints module for more details
+//!  - `#[dom_struct]` : Implies #[derive(JSTraceable, DenyPublicFields)]`, and `#[must_root]`.
+//!                       Use this for structs that correspond to a DOM type
+
+
+#![deny(unsafe_code)]
+#![feature(box_syntax, plugin, plugin_registrar, quote, rustc_private, slice_patterns)]
+
+#[macro_use]
+extern crate rustc;
+extern crate rustc_plugin;
+extern crate syntax;
+
+use rustc_plugin::Registry;
+use syntax::ext::base::*;
+use syntax::feature_gate::AttributeType::Whitelisted;
+use syntax::symbol::Symbol;
+
+mod ban;
+// Public for documentation to show up
+/// Handles the auto-deriving for `#[derive(JSTraceable)]`
+pub mod jstraceable;
+mod unrooted_must_root;
+/// Utilities for writing plugins
+mod utils;
+
+#[plugin_registrar]
+pub fn plugin_registrar(reg: &mut Registry) {
+    reg.register_syntax_extension(
+        Symbol::intern("dom_struct"),
+        MultiModifier(box jstraceable::expand_dom_struct));
+
+    reg.register_late_lint_pass(box unrooted_must_root::UnrootedPass::new());
+    reg.register_early_lint_pass(box ban::BanPass);
+    reg.register_attribute("allow_unrooted_interior".to_string(), Whitelisted);
+    reg.register_attribute("must_root".to_string(), Whitelisted);
+}