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// Copyright 2017 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 python
// This file contains the module types for building Python binary.
import (
"fmt"
"path/filepath"
"strings"
"android/soong/android"
)
func init() {
android.RegisterModuleType("python_binary_host", PythonBinaryHostFactory)
}
type BinaryProperties struct {
// the name of the source file that is the main entry point of the program.
// this file must also be listed in srcs.
// If left unspecified, module name is used instead.
// If name doesn’t match any filename in srcs, main must be specified.
Main *string `android:"arch_variant"`
// set the name of the output binary.
Stem *string `android:"arch_variant"`
// append to the name of the output binary.
Suffix *string `android:"arch_variant"`
// list of compatibility suites (for example "cts", "vts") that the module should be
// installed into.
Test_suites []string `android:"arch_variant"`
}
type binaryDecorator struct {
binaryProperties BinaryProperties
*pythonInstaller
}
type IntermPathProvider interface {
IntermPathForModuleOut() android.OptionalPath
}
var (
stubTemplateHost = "build/soong/python/scripts/stub_template_host.txt"
)
func NewBinary(hod android.HostOrDeviceSupported) (*Module, *binaryDecorator) {
module := newModule(hod, android.MultilibFirst)
decorator := &binaryDecorator{pythonInstaller: NewPythonInstaller("bin", "")}
module.bootstrapper = decorator
module.installer = decorator
return module, decorator
}
func PythonBinaryHostFactory() android.Module {
module, _ := NewBinary(android.HostSupportedNoCross)
return module.Init()
}
func (binary *binaryDecorator) bootstrapperProps() []interface{} {
return []interface{}{&binary.binaryProperties}
}
func (binary *binaryDecorator) bootstrap(ctx android.ModuleContext, actual_version string,
embedded_launcher bool, srcsPathMappings []pathMapping, parSpec parSpec,
depsPyRunfiles []string, depsParSpecs []parSpec) android.OptionalPath {
// no Python source file for compiling .par file.
if len(srcsPathMappings) == 0 {
return android.OptionalPath{}
}
// the runfiles packages needs to be populated with "__init__.py".
newPyPkgs := []string{}
// the set to de-duplicate the new Python packages above.
newPyPkgSet := make(map[string]bool)
// the runfiles dirs have been treated as packages.
existingPyPkgSet := make(map[string]bool)
wholePyRunfiles := []string{}
for _, path := range srcsPathMappings {
wholePyRunfiles = append(wholePyRunfiles, path.dest)
}
wholePyRunfiles = append(wholePyRunfiles, depsPyRunfiles...)
// find all the runfiles dirs which have been treated as packages.
for _, path := range wholePyRunfiles {
if filepath.Base(path) != initFileName {
continue
}
existingPyPkg := PathBeforeLastSlash(path)
if _, found := existingPyPkgSet[existingPyPkg]; found {
panic(fmt.Errorf("found init file path duplicates: %q for module: %q.",
path, ctx.ModuleName()))
} else {
existingPyPkgSet[existingPyPkg] = true
}
parentPath := PathBeforeLastSlash(existingPyPkg)
populateNewPyPkgs(parentPath, existingPyPkgSet, newPyPkgSet, &newPyPkgs)
}
// create new packages under runfiles tree.
for _, path := range wholePyRunfiles {
if filepath.Base(path) == initFileName {
continue
}
parentPath := PathBeforeLastSlash(path)
populateNewPyPkgs(parentPath, existingPyPkgSet, newPyPkgSet, &newPyPkgs)
}
main := binary.getPyMainFile(ctx, srcsPathMappings)
if main == "" {
return android.OptionalPath{}
}
var launcher_path android.Path
if embedded_launcher {
ctx.VisitDirectDepsWithTag(launcherTag, func(m android.Module) {
if provider, ok := m.(IntermPathProvider); ok {
if launcher_path != nil {
panic(fmt.Errorf("launcher path was found before: %q",
launcher_path))
}
launcher_path = provider.IntermPathForModuleOut().Path()
}
})
}
binFile := registerBuildActionForParFile(ctx, embedded_launcher, launcher_path,
binary.getHostInterpreterName(ctx, actual_version),
main, binary.getStem(ctx), newPyPkgs, append(depsParSpecs, parSpec))
return android.OptionalPathForPath(binFile)
}
// get host interpreter name.
func (binary *binaryDecorator) getHostInterpreterName(ctx android.ModuleContext,
actual_version string) string {
var interp string
switch actual_version {
case pyVersion2:
interp = "python2.7"
case pyVersion3:
interp = "python3"
default:
panic(fmt.Errorf("unknown Python actualVersion: %q for module: %q.",
actual_version, ctx.ModuleName()))
}
return interp
}
// find main program path within runfiles tree.
func (binary *binaryDecorator) getPyMainFile(ctx android.ModuleContext,
srcsPathMappings []pathMapping) string {
var main string
if String(binary.binaryProperties.Main) == "" {
main = ctx.ModuleName() + pyExt
} else {
main = String(binary.binaryProperties.Main)
}
for _, path := range srcsPathMappings {
if main == path.src.Rel() {
return path.dest
}
}
ctx.PropertyErrorf("main", "%q is not listed in srcs.", main)
return ""
}
func (binary *binaryDecorator) getStem(ctx android.ModuleContext) string {
stem := ctx.ModuleName()
if String(binary.binaryProperties.Stem) != "" {
stem = String(binary.binaryProperties.Stem)
}
return stem + String(binary.binaryProperties.Suffix)
}
// Sets the given directory and all its ancestor directories as Python packages.
func populateNewPyPkgs(pkgPath string, existingPyPkgSet,
newPyPkgSet map[string]bool, newPyPkgs *[]string) {
for pkgPath != "" {
if _, found := existingPyPkgSet[pkgPath]; found {
break
}
if _, found := newPyPkgSet[pkgPath]; !found {
newPyPkgSet[pkgPath] = true
*newPyPkgs = append(*newPyPkgs, pkgPath)
// Gets its ancestor directory by trimming last slash.
pkgPath = PathBeforeLastSlash(pkgPath)
} else {
break
}
}
}
// filepath.Dir("abc") -> "." and filepath.Dir("/abc") -> "/". However,
// the PathBeforeLastSlash() will return "" for both cases above.
func PathBeforeLastSlash(path string) string {
if idx := strings.LastIndex(path, "/"); idx != -1 {
return path[:idx]
}
return ""
}
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