Generate code into OUT_DIR.

This is necessary to ensure Cargo knows when to rebuild. Normally
.gitignore would be enough to exclude these from Cargo's freshness
calculation, but rust-lang/cargo#1729 prevents
this currently. This is the new, correct way to do these thigns, just
like the style crate does.

Author: metajack

.gitignore

@@ -1,19 +1,11 @@
+/.servo
 /.cargo
-/Cargo.lock
+/.servobuild
 /target
-/components/servo/target
-/ports/gonk/target
-/ports/cef/target
 /ports/android/bin
 /ports/android/libs
 /ports/android/local.properties
 /ports/android/obj
-/components/script/dom/bindings/codegen/*.rs
-/components/script/dom/bindings/codegen/_cache
-/components/script/dom/bindings/codegen/Bindings
-/components/script/dom/bindings/codegen/test/*.rs
-/.servobuild
-/.servo
 /tests/wpt/_virtualenv
 *~
 *#
@@ -34,4 +26,3 @@ Servo.app
 .config.mk.last
 parser.out
 /glfw
-

components/script/dom/bindings/codegen/CodegenRust.py

@@ -1429,25 +1429,26 @@ class CGImports(CGWrapper):
     """
     Generates the appropriate import/use statements.
     """
-    def __init__(self, child, descriptors, callbacks, imports):
+    def __init__(self, child, descriptors, callbacks, imports, ignored_warnings=None):
         """
         Adds a set of imports.
         """
-        ignored_warnings = [
-            # Allow unreachable_code because we use 'break' in a way that
-            # sometimes produces two 'break's in a row. See for example
-            # CallbackMember.getArgConversions.
-            'unreachable_code',
-            'non_camel_case_types',
-            'non_upper_case_globals',
-            'unused_parens',
-            'unused_imports',
-            'unused_variables',
-            'unused_unsafe',
-            'unused_mut',
-            'unused_assignments',
-            'dead_code',
-        ]
+        if ignored_warnings is None:
+            ignored_warnings = [
+                # Allow unreachable_code because we use 'break' in a way that
+                # sometimes produces two 'break's in a row. See for example
+                # CallbackMember.getArgConversions.
+                'unreachable_code',
+                'non_camel_case_types',
+                'non_upper_case_globals',
+                'unused_parens',
+                'unused_imports',
+                'unused_variables',
+                'unused_unsafe',
+                'unused_mut',
+                'unused_assignments',
+                'dead_code',
+            ]
 
         def componentTypes(type):
             if type.nullable():
@@ -1496,7 +1497,9 @@ def getIdentifier(t):
 
         imports += ['dom::types::%s' % getIdentifier(t).name for t in types if isImportable(t)]
 
-        statements = ['#![allow(%s)]' % ','.join(ignored_warnings)]
+        statements = []
+        if len(ignored_warnings) > 0:
+            statements.append('#![allow(%s)]' % ','.join(ignored_warnings))
         statements.extend('use %s;' % i for i in sorted(set(imports)))
 
         CGWrapper.__init__(self, child,
@@ -1815,7 +1818,7 @@ def UnionTypes(descriptors, dictionaries, callbacks, config):
                 CGUnionConversionStruct(t, provider)
             ])
 
-    return CGImports(CGList(SortedDictValues(unionStructs), "\n\n"), [], [], imports)
+    return CGImports(CGList(SortedDictValues(unionStructs), "\n\n"), [], [], imports, ignored_warnings=[])
 
 
 class Argument():
@@ -5415,7 +5418,7 @@ def RegisterBindings(config):
             'js::jsapi::JSContext',
             'js::jsapi::JSObject',
             'libc',
-        ])
+        ], ignored_warnings=[])
 
     @staticmethod
     def InterfaceTypes(config):
@@ -5438,8 +5441,7 @@ def Bindings(config):
     def InheritTypes(config):
 
         descriptors = config.getDescriptors(register=True, isCallback=False)
-        allprotos = [CGGeneric("#![allow(unused_imports)]\n"),
-                     CGGeneric("use dom::types::*;\n"),
+        allprotos = [CGGeneric("use dom::types::*;\n"),
                      CGGeneric("use dom::bindings::js::{JS, JSRef, LayoutJS, Rootable, Temporary};\n"),
                      CGGeneric("use dom::bindings::trace::JSTraceable;\n"),
                      CGGeneric("use dom::bindings::utils::Reflectable;\n"),

components/script/dom/bindings/mod.rs

@@ -155,11 +155,30 @@ pub mod codegen {
     // FIXME(#5853) we shouldn't need to
     // allow moved_no_move here
     #[allow(unrooted_must_root, moved_no_move)]
-    pub mod Bindings;
-    pub mod InterfaceTypes;
-    pub mod InheritTypes;
-    pub mod PrototypeList;
-    pub mod RegisterBindings;
-    pub mod UnionTypes;
+    pub mod Bindings {
+        include!(concat!(env!("OUT_DIR"), "/Bindings/mod.rs"));
+    }
+    pub mod InterfaceTypes {
+        include!(concat!(env!("OUT_DIR"), "/InterfaceTypes.rs"));
+    }
+    #[allow(unused_imports)]
+    pub mod InheritTypes {
+        include!(concat!(env!("OUT_DIR"), "/InheritTypes.rs"));
+    }
+    pub mod PrototypeList {
+        include!(concat!(env!("OUT_DIR"), "/PrototypeList.rs"));
+    }
+    #[allow(unreachable_code, non_camel_case_types, non_upper_case_globals, unused_parens,
+            unused_imports, unused_variables, unused_unsafe, unused_mut, unused_assignments,
+            dead_code)]
+    pub mod RegisterBindings {
+        include!(concat!(env!("OUT_DIR"), "/RegisterBindings.rs"));
+    }
+    #[allow(unreachable_code, non_camel_case_types, non_upper_case_globals, unused_parens,
+            unused_imports, unused_variables, unused_unsafe, unused_mut, unused_assignments,
+            dead_code)]
+    pub mod UnionTypes {
+        include!(concat!(env!("OUT_DIR"), "/UnionTypes.rs"));
+    }
 }
 

components/script/dom/mod.rs

@@ -190,8 +190,9 @@ pub mod macros;
 
 pub mod bindings;
 
-#[path="bindings/codegen/InterfaceTypes.rs"]
-pub mod types;
+pub mod types {
+    include!(concat!(env!("OUT_DIR"), "/InterfaceTypes.rs"));
+}
 
 pub mod activation;
 pub mod attr;

components/script/makefile.cargo

@@ -8,38 +8,38 @@ BINDINGS_SRC = $(shell pwd)/dom/bindings/codegen
 WEBIDLS_SRC = $(shell pwd)/dom/webidls
 WEBIDLS = $(call rwildcard,$(WEBIDLS_SRC),*.webidl)
 BINDINGS = $(patsubst %.webidl,%Binding.rs,$(WEBIDLS))
-AUTOGEN_SRC = $(foreach var,$(BINDINGS),$(subst $(WEBIDLS_SRC),$(BINDINGS_SRC)/Bindings,$(var)))
+AUTOGEN_SRC = $(foreach var,$(BINDINGS),$(subst $(WEBIDLS_SRC),$(OUT_DIR)/Bindings,$(var)))
 
-CACHE_DIR = $(BINDINGS_SRC)/_cache
+CACHE_DIR = $(OUT_DIR)/_cache
 
-bindinggen_dependencies := $(addprefix $(BINDINGS_SRC)/,BindingGen.py Bindings.conf Configuration.py CodegenRust.py parser/WebIDL.py ParserResults.pkl Bindings/.done)
+bindinggen_dependencies := $(addprefix $(BINDINGS_SRC)/,BindingGen.py Bindings.conf Configuration.py CodegenRust.py parser/WebIDL.py) $(OUT_DIR)/ParserResults.pkl $(OUT_DIR)/Bindings/.done
 
-globalgen_dependencies := $(addprefix $(BINDINGS_SRC)/,GlobalGen.py Bindings.conf Configuration.py CodegenRust.py parser/WebIDL.py) $(CACHE_DIR)/.done $(BINDINGS_SRC)/Bindings/.done
+globalgen_dependencies := $(addprefix $(BINDINGS_SRC)/,GlobalGen.py Bindings.conf Configuration.py CodegenRust.py parser/WebIDL.py) $(CACHE_DIR)/.done $(OUT_DIR)/Bindings/.done
 
 .PHONY: all
 all: $(AUTOGEN_SRC)
 
-$(BINDINGS_SRC)/Bindings/.done:
-	mkdir -p $(BINDINGS_SRC)/Bindings
+$(OUT_DIR)/Bindings/.done:
+	mkdir -p $(OUT_DIR)/Bindings
 	touch $@
 
 $(CACHE_DIR)/.done:
 	mkdir -p $(CACHE_DIR)
 	touch $@
 
-$(BINDINGS_SRC)/ParserResults.pkl: $(globalgen_dependencies) $(WEBIDLS)
+$(OUT_DIR)/ParserResults.pkl: $(globalgen_dependencies) $(WEBIDLS)
 	$(PYTHON) $(BINDINGS_SRC)/pythonpath.py \
 	  -I$(BINDINGS_SRC)/parser -I$(BINDINGS_SRC)/ply \
-	  -D$(BINDINGS_SRC) \
+	  -D$(OUT_DIR) \
 	  $(BINDINGS_SRC)/GlobalGen.py $(BINDINGS_SRC)/Bindings.conf . \
 	  --cachedir=$(CACHE_DIR) \
 	  $(WEBIDLS)
 
-$(AUTOGEN_SRC): $(BINDINGS_SRC)/Bindings/%Binding.rs: $(bindinggen_dependencies) \
-						$(addprefix $(WEBIDLS_SRC)/,%.webidl)
+$(AUTOGEN_SRC): $(OUT_DIR)/Bindings/%Binding.rs: $(bindinggen_dependencies) \
+						 $(addprefix $(WEBIDLS_SRC)/,%.webidl)
 	$(PYTHON) $(BINDINGS_SRC)/pythonpath.py \
 	  -I$(BINDINGS_SRC)/parser -I$(BINDINGS_SRC)/ply \
-	  -D$(BINDINGS_SRC) \
+	  -D$(OUT_DIR) \
 	  $(BINDINGS_SRC)/BindingGen.py \
 	  $(BINDINGS_SRC)/Bindings.conf Bindings/$*Binding $(addprefix $(WEBIDLS_SRC)/,$*.webidl)
 	touch $@