style: Remove the ability to build Gecko without the bindgen feature.

This is not used for anything, as far as I can tell.

Differential Revision: https://phabricator.services.mozilla.com/D38584

components/style/Cargo.toml

@@ -16,8 +16,7 @@ path = "lib.rs"
 doctest = false
 
 [features]
-gecko = ["style_traits/gecko", "fallible/known_system_malloc"]
+gecko = ["style_traits/gecko", "fallible/known_system_malloc", "bindgen", "regex", "toml"]
-use_bindgen = ["bindgen", "regex", "toml"]
 servo = ["serde", "style_traits/servo", "servo_atoms", "servo_config", "html5ever",
          "cssparser/serde", "encoding_rs", "malloc_size_of/servo", "arrayvec/use_union",
          "servo_url", "string_cache", "crossbeam-channel", "to_shmem/servo", "servo_arc/servo"]

components/style/build.rs

@@ -4,13 +4,13 @@
 
 #[macro_use]
 extern crate lazy_static;
-#[cfg(feature = "bindgen")]
+#[cfg(feature = "gecko")]
 extern crate bindgen;
-#[cfg(feature = "bindgen")]
+#[cfg(feature = "gecko")]
 extern crate log;
-#[cfg(feature = "bindgen")]
+#[cfg(feature = "gecko")]
 extern crate regex;
-#[cfg(feature = "bindgen")]
+#[cfg(feature = "gecko")]
 extern crate toml;
 extern crate walkdir;
 

components/style/build_gecko.rs

@@ -2,20 +2,7 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
 
-mod common {
+use super::PYTHON;
-    use std::env;
-    use std::path::PathBuf;
-
-    lazy_static! {
-        pub static ref OUTDIR_PATH: PathBuf =
-            PathBuf::from(env::var_os("OUT_DIR").unwrap()).join("gecko");
-    }
-}
-
-#[cfg(feature = "bindgen")]
-mod bindings {
-    use super::super::PYTHON;
-    use super::common::*;
 use bindgen::{Builder, CodegenConfig};
 use regex::Regex;
 use std::cmp;
@@ -31,6 +18,10 @@ mod bindings {
 use toml;
 use toml::value::Table;
 
+lazy_static! {
+    static ref OUTDIR_PATH: PathBuf = PathBuf::from(env::var_os("OUT_DIR").unwrap()).join("gecko");
+}
+
 const STRUCTS_FILE: &'static str = "structs.rs";
 
 fn read_config(path: &PathBuf) -> Table {
@@ -294,9 +285,7 @@ mod bindings {
 fn generate_structs() {
     let builder = Builder::get_initial_builder()
         .enable_cxx_namespaces()
-            .with_codegen_config(
+        .with_codegen_config(CodegenConfig::TYPES | CodegenConfig::VARS | CodegenConfig::FUNCTIONS);
-                CodegenConfig::TYPES | CodegenConfig::VARS | CodegenConfig::FUNCTIONS,
-            );
     let mut fixups = vec![];
     let builder = BuilderWithConfig::new(builder, CONFIG["structs"].as_table().unwrap())
         .handle_common(&mut fixups)
@@ -406,6 +395,8 @@ mod bindings {
 }
 
 pub fn generate() {
+    println!("cargo:rerun-if-changed=build_gecko.rs");
+    fs::create_dir_all(&*OUTDIR_PATH).unwrap();
     setup_logging();
     generate_structs();
     generate_atoms();
@@ -414,46 +405,3 @@ mod bindings {
         println!("cargo:rerun-if-changed={}", path.to_str().unwrap());
     }
 }
-}
-
-#[cfg(not(feature = "bindgen"))]
-mod bindings {
-    use super::common::*;
-    use std::path::{Path, PathBuf};
-    use std::{env, fs, io};
-
-    /// Copy contents of one directory into another.
-    /// It currently only does a shallow copy.
-    fn copy_dir<P, Q, F>(from: P, to: Q, callback: F) -> io::Result<()>
-    where
-        P: AsRef<Path>,
-        Q: AsRef<Path>,
-        F: Fn(&Path),
-    {
-        let to = to.as_ref();
-        for entry in from.as_ref().read_dir()? {
-            let entry = entry?;
-            let path = entry.path();
-            callback(&path);
-            fs::copy(&path, to.join(entry.file_name()))?;
-        }
-        Ok(())
-    }
-
-    pub fn generate() {
-        let dir = PathBuf::from(env::var_os("CARGO_MANIFEST_DIR").unwrap()).join("gecko/generated");
-        println!("cargo:rerun-if-changed={}", dir.display());
-        copy_dir(&dir, &*OUTDIR_PATH, |path| {
-            println!("cargo:rerun-if-changed={}", path.display());
-        })
-        .expect("Fail to copy generated files to out dir");
-    }
-}
-
-pub fn generate() {
-    use self::common::*;
-    use std::fs;
-    println!("cargo:rerun-if-changed=build_gecko.rs");
-    fs::create_dir_all(&*OUTDIR_PATH).unwrap();
-    bindings::generate();
-}