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// Copyright 2016 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 cc
import (
"path/filepath"
"github.com/google/blueprint"
"android/soong/android"
)
// Returns the NDK base include path for use with sdk_version current. Usable with -I.
func getCurrentIncludePath(ctx android.ModuleContext) android.OutputPath {
return getNdkSysrootBase(ctx).Join(ctx, "usr/include")
}
type headerProperies struct {
// Base directory of the headers being installed. As an example:
//
// ndk_headers {
// name: "foo",
// from: "include",
// to: "",
// srcs: ["include/foo/bar/baz.h"],
// }
//
// Will install $SYSROOT/usr/include/foo/bar/baz.h. If `from` were instead
// "include/foo", it would have installed $SYSROOT/usr/include/bar/baz.h.
From string
// Install path within the sysroot. This is relative to usr/include.
To string
// List of headers to install. Glob compatible. Common case is "include/**/*.h".
Srcs []string
}
type headerModule struct {
android.ModuleBase
properties headerProperies
installPaths []string
}
func (m *headerModule) GenerateAndroidBuildActions(ctx android.ModuleContext) {
srcFiles := ctx.ExpandSources(m.properties.Srcs, nil)
for _, header := range srcFiles {
// Output path is the sysroot base + "usr/include" + to directory + directory component
// of the file without the leading from directory stripped.
//
// Given:
// sysroot base = "ndk/sysroot"
// from = "include/foo"
// to = "bar"
// header = "include/foo/woodly/doodly.h"
// output path = "ndk/sysroot/usr/include/bar/woodly/doodly.h"
// full/platform/path/to/include/foo
fullFromPath := android.PathForModuleSrc(ctx, m.properties.From)
// full/platform/path/to/include/foo/woodly
headerDir := filepath.Dir(header.String())
// woodly
strippedHeaderDir, err := filepath.Rel(fullFromPath.String(), headerDir)
if err != nil {
ctx.ModuleErrorf("filepath.Rel(%q, %q) failed: %s", headerDir,
fullFromPath.String(), err)
}
// full/platform/path/to/sysroot/usr/include/bar/woodly
installDir := getCurrentIncludePath(ctx).Join(ctx, m.properties.To, strippedHeaderDir)
// full/platform/path/to/sysroot/usr/include/bar/woodly/doodly.h
installPath := ctx.InstallFile(installDir, header)
m.installPaths = append(m.installPaths, installPath.String())
}
if len(m.installPaths) == 0 {
ctx.ModuleErrorf("srcs %q matched zero files", m.properties.Srcs)
}
}
func ndkHeadersFactory() (blueprint.Module, []interface{}) {
module := &headerModule{}
return android.InitAndroidArchModule(module, android.HostSupported, android.MultilibFirst,
&module.properties)
}
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