Split *ModuleContext out of module.go

Move EarlyModuleContext, BaseModuleContext and ModuleContext out of
module.go and into early_module_context, base_module_context and
module_context.go respectively.

Test: builds
Change-Id: I52e6eb1589d1478233c1c55d770b395a16eaa1a3

android/early_module_context.go

@@ -0,0 +1,169 @@
+// Copyright 2015 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package android
+
+import (
+	"github.com/google/blueprint"
+	"os"
+	"text/scanner"
+)
+
+// EarlyModuleContext provides methods that can be called early, as soon as the properties have
+// been parsed into the module and before any mutators have run.
+type EarlyModuleContext interface {
+	// Module returns the current module as a Module.  It should rarely be necessary, as the module already has a
+	// reference to itself.
+	Module() Module
+
+	// ModuleName returns the name of the module.  This is generally the value that was returned by Module.Name() when
+	// the module was created, but may have been modified by calls to BaseMutatorContext.Rename.
+	ModuleName() string
+
+	// ModuleDir returns the path to the directory that contains the definition of the module.
+	ModuleDir() string
+
+	// ModuleType returns the name of the module type that was used to create the module, as specified in
+	// RegisterModuleType.
+	ModuleType() string
+
+	// BlueprintFile returns the name of the blueprint file that contains the definition of this
+	// module.
+	BlueprintsFile() string
+
+	// ContainsProperty returns true if the specified property name was set in the module definition.
+	ContainsProperty(name string) bool
+
+	// Errorf reports an error at the specified position of the module definition file.
+	Errorf(pos scanner.Position, fmt string, args ...interface{})
+
+	// ModuleErrorf reports an error at the line number of the module type in the module definition.
+	ModuleErrorf(fmt string, args ...interface{})
+
+	// PropertyErrorf reports an error at the line number of a property in the module definition.
+	PropertyErrorf(property, fmt string, args ...interface{})
+
+	// Failed returns true if any errors have been reported.  In most cases the module can continue with generating
+	// build rules after an error, allowing it to report additional errors in a single run, but in cases where the error
+	// has prevented the module from creating necessary data it can return early when Failed returns true.
+	Failed() bool
+
+	// AddNinjaFileDeps adds dependencies on the specified files to the rule that creates the ninja manifest.  The
+	// primary builder will be rerun whenever the specified files are modified.
+	AddNinjaFileDeps(deps ...string)
+
+	DeviceSpecific() bool
+	SocSpecific() bool
+	ProductSpecific() bool
+	SystemExtSpecific() bool
+	Platform() bool
+
+	Config() Config
+	DeviceConfig() DeviceConfig
+
+	// Deprecated: use Config()
+	AConfig() Config
+
+	// GlobWithDeps returns a list of files that match the specified pattern but do not match any
+	// of the patterns in excludes.  It also adds efficient dependencies to rerun the primary
+	// builder whenever a file matching the pattern as added or removed, without rerunning if a
+	// file that does not match the pattern is added to a searched directory.
+	GlobWithDeps(pattern string, excludes []string) ([]string, error)
+
+	Glob(globPattern string, excludes []string) Paths
+	GlobFiles(globPattern string, excludes []string) Paths
+	IsSymlink(path Path) bool
+	Readlink(path Path) string
+
+	// Namespace returns the Namespace object provided by the NameInterface set by Context.SetNameInterface, or the
+	// default SimpleNameInterface if Context.SetNameInterface was not called.
+	Namespace() *Namespace
+}
+
+// Deprecated: use EarlyModuleContext instead
+type BaseContext interface {
+	EarlyModuleContext
+}
+
+type earlyModuleContext struct {
+	blueprint.EarlyModuleContext
+
+	kind   moduleKind
+	config Config
+}
+
+func (e *earlyModuleContext) Glob(globPattern string, excludes []string) Paths {
+	return Glob(e, globPattern, excludes)
+}
+
+func (e *earlyModuleContext) GlobFiles(globPattern string, excludes []string) Paths {
+	return GlobFiles(e, globPattern, excludes)
+}
+
+func (e *earlyModuleContext) IsSymlink(path Path) bool {
+	fileInfo, err := e.config.fs.Lstat(path.String())
+	if err != nil {
+		e.ModuleErrorf("os.Lstat(%q) failed: %s", path.String(), err)
+	}
+	return fileInfo.Mode()&os.ModeSymlink == os.ModeSymlink
+}
+
+func (e *earlyModuleContext) Readlink(path Path) string {
+	dest, err := e.config.fs.Readlink(path.String())
+	if err != nil {
+		e.ModuleErrorf("os.Readlink(%q) failed: %s", path.String(), err)
+	}
+	return dest
+}
+
+func (e *earlyModuleContext) Module() Module {
+	module, _ := e.EarlyModuleContext.Module().(Module)
+	return module
+}
+
+func (e *earlyModuleContext) Config() Config {
+	return e.EarlyModuleContext.Config().(Config)
+}
+
+func (e *earlyModuleContext) AConfig() Config {
+	return e.config
+}
+
+func (e *earlyModuleContext) DeviceConfig() DeviceConfig {
+	return DeviceConfig{e.config.deviceConfig}
+}
+
+func (e *earlyModuleContext) Platform() bool {
+	return e.kind == platformModule
+}
+
+func (e *earlyModuleContext) DeviceSpecific() bool {
+	return e.kind == deviceSpecificModule
+}
+
+func (e *earlyModuleContext) SocSpecific() bool {
+	return e.kind == socSpecificModule
+}
+
+func (e *earlyModuleContext) ProductSpecific() bool {
+	return e.kind == productSpecificModule
+}
+
+func (e *earlyModuleContext) SystemExtSpecific() bool {
+	return e.kind == systemExtSpecificModule
+}
+
+func (e *earlyModuleContext) Namespace() *Namespace {
+	return e.EarlyModuleContext.Namespace().(*Namespace)
+}