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package bp2build
import (
"android/soong/android"
"android/soong/cc/config"
"fmt"
"reflect"
"sort"
"strings"
"github.com/google/blueprint/proptools"
)
type BazelFile struct {
Dir string
Basename string
Contents string
}
func CreateSoongInjectionFiles() []BazelFile {
var files []BazelFile
files = append(files, newFile("cc_toolchain", "BUILD", "")) // Creates a //cc_toolchain package.
files = append(files, newFile("cc_toolchain", "constants.bzl", config.BazelCcToolchainVars()))
return files
}
func CreateBazelFiles(
ruleShims map[string]RuleShim,
buildToTargets map[string]BazelTargets,
mode CodegenMode) []BazelFile {
var files []BazelFile
if mode == QueryView {
// Write top level WORKSPACE.
files = append(files, newFile("", "WORKSPACE", ""))
// Used to denote that the top level directory is a package.
files = append(files, newFile("", GeneratedBuildFileName, ""))
files = append(files, newFile(bazelRulesSubDir, GeneratedBuildFileName, ""))
// These files are only used for queryview.
files = append(files, newFile(bazelRulesSubDir, "providers.bzl", providersBzl))
for bzlFileName, ruleShim := range ruleShims {
files = append(files, newFile(bazelRulesSubDir, bzlFileName+".bzl", ruleShim.content))
}
files = append(files, newFile(bazelRulesSubDir, "soong_module.bzl", generateSoongModuleBzl(ruleShims)))
}
files = append(files, createBuildFiles(buildToTargets, mode)...)
return files
}
func createBuildFiles(buildToTargets map[string]BazelTargets, mode CodegenMode) []BazelFile {
files := make([]BazelFile, 0, len(buildToTargets))
for _, dir := range android.SortedStringKeys(buildToTargets) {
if mode == Bp2Build && !android.ShouldWriteBuildFileForDir(dir) {
fmt.Printf("[bp2build] Not writing generated BUILD file for dir: '%s'\n", dir)
continue
}
targets := buildToTargets[dir]
sort.Slice(targets, func(i, j int) bool {
// this will cover all bp2build generated targets
if targets[i].name < targets[j].name {
return true
}
// give a strict ordering to content from hand-crafted targets
return targets[i].content < targets[j].content
})
content := soongModuleLoad
if mode == Bp2Build {
content = `# This file was automatically generated by bp2build for the Bazel migration project.
# Feel free to edit or test it, but do *not* check it into your version control system.`
content += "\n\n"
content += "package(default_visibility = [\"//visibility:public\"])"
content += "\n\n"
content += targets.LoadStatements()
}
if content != "" {
// If there are load statements, add a couple of newlines.
content += "\n\n"
}
content += targets.String()
files = append(files, newFile(dir, GeneratedBuildFileName, content))
}
return files
}
func newFile(dir, basename, content string) BazelFile {
return BazelFile{
Dir: dir,
Basename: basename,
Contents: content,
}
}
const (
bazelRulesSubDir = "build/bazel/queryview_rules"
// additional files:
// * workspace file
// * base BUILD file
// * rules BUILD file
// * rules providers.bzl file
// * rules soong_module.bzl file
numAdditionalFiles = 5
)
var (
// Certain module property names are blocklisted/ignored here, for the reasons commented.
ignoredPropNames = map[string]bool{
"name": true, // redundant, since this is explicitly generated for every target
"from": true, // reserved keyword
"in": true, // reserved keyword
"size": true, // reserved for tests
"arch": true, // interface prop type is not supported yet.
"multilib": true, // interface prop type is not supported yet.
"target": true, // interface prop type is not supported yet.
"visibility": true, // Bazel has native visibility semantics. Handle later.
"features": true, // There is already a built-in attribute 'features' which cannot be overridden.
}
)
func shouldGenerateAttribute(prop string) bool {
return !ignoredPropNames[prop]
}
func shouldSkipStructField(field reflect.StructField) bool {
if field.PkgPath != "" {
// Skip unexported fields. Some properties are
// internal to Soong only, and these fields do not have PkgPath.
return true
}
// fields with tag `blueprint:"mutated"` are exported to enable modification in mutators, etc
// but cannot be set in a .bp file
if proptools.HasTag(field, "blueprint", "mutated") {
return true
}
return false
}
// FIXME(b/168089390): In Bazel, rules ending with "_test" needs to be marked as
// testonly = True, forcing other rules that depend on _test rules to also be
// marked as testonly = True. This semantic constraint is not present in Soong.
// To work around, rename "*_test" rules to "*_test_".
func canonicalizeModuleType(moduleName string) string {
if strings.HasSuffix(moduleName, "_test") {
return moduleName + "_"
}
return moduleName
}
|
