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Merge "bp2build: add a simple UI to report migration progress."

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This commit is contained in:
Jingwen Chen
2021-02-22 03:23:13 +00:00
committed by Gerrit Code Review
parent b4697b8125 164e0867fc
commit 2391d08872
10 changed files with 107 additions and 25 deletions
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1
bp2build/Android.bp
View File

@@ -11,6 +11,7 @@ bootstrap_go_package {
"build_conversion.go",
"bzl_conversion.go",
"conversion.go",
"metrics.go",
],
deps: [
"soong-android",

6
bp2build/bp2build.go
View File

@@ -22,13 +22,13 @@ import (
// The Bazel bp2build code generator is responsible for writing .bzl files that are equivalent to
// Android.bp files that are capable of being built with Bazel.
func Codegen(ctx CodegenContext) {
func Codegen(ctx CodegenContext) CodegenMetrics {
outputDir := android.PathForOutput(ctx, "bp2build")
android.RemoveAllOutputDir(outputDir)
ruleShims := CreateRuleShims(android.ModuleTypeFactories())
buildToTargets := GenerateBazelTargets(ctx.Context(), ctx.mode)
buildToTargets, metrics := GenerateBazelTargets(ctx)
filesToWrite := CreateBazelFiles(ruleShims, buildToTargets, ctx.mode)
for _, f := range filesToWrite {
@@ -36,6 +36,8 @@ func Codegen(ctx CodegenContext) {
fmt.Errorf("Failed to write %q (dir %q) due to %q", f.Basename, f.Dir, err)
}
}
return metrics
}
func writeFile(outputDir android.OutputPath, ctx android.PathContext, f BazelFile) error {

43
bp2build/build_conversion.go
View File

@@ -105,6 +105,10 @@ type CodegenContext struct {
mode CodegenMode
}
func (c *CodegenContext) Mode() CodegenMode {
return c.mode
}
// CodegenMode is an enum to differentiate code-generation modes.
type CodegenMode int
@@ -160,33 +164,54 @@ func propsToAttributes(props map[string]string) string {
return attributes
}
func GenerateBazelTargets(ctx bpToBuildContext, codegenMode CodegenMode) map[string]BazelTargets {
func GenerateBazelTargets(ctx CodegenContext) (map[string]BazelTargets, CodegenMetrics) {
buildFileToTargets := make(map[string]BazelTargets)
ctx.VisitAllModules(func(m blueprint.Module) {
dir := ctx.ModuleDir(m)
// Simple metrics tracking for bp2build
totalModuleCount := 0
ruleClassCount := make(map[string]int)
bpCtx := ctx.Context()
bpCtx.VisitAllModules(func(m blueprint.Module) {
dir := bpCtx.ModuleDir(m)
var t BazelTarget
switch codegenMode {
switch ctx.Mode() {
case Bp2Build:
if _, ok := m.(android.BazelTargetModule); !ok {
// Only include regular Soong modules (non-BazelTargetModules) into the total count.
totalModuleCount += 1
return
}
t = generateBazelTarget(ctx, m)
t = generateBazelTarget(bpCtx, m)
ruleClassCount[t.ruleClass] += 1
case QueryView:
// Blocklist certain module types from being generated.
if canonicalizeModuleType(ctx.ModuleType(m)) == "package" {
if canonicalizeModuleType(bpCtx.ModuleType(m)) == "package" {
// package module name contain slashes, and thus cannot
// be mapped cleanly to a bazel label.
return
}
t = generateSoongModuleTarget(ctx, m)
t = generateSoongModuleTarget(bpCtx, m)
default:
panic(fmt.Errorf("Unknown code-generation mode: %s", codegenMode))
panic(fmt.Errorf("Unknown code-generation mode: %s", ctx.Mode()))
}
buildFileToTargets[dir] = append(buildFileToTargets[dir], t)
})
return buildFileToTargets
metrics := CodegenMetrics{
TotalModuleCount: totalModuleCount,
RuleClassCount: ruleClassCount,
}
return buildFileToTargets, metrics
}
// Helper method for tests to easily access the targets in a dir.
func GenerateBazelTargetsForDir(codegenCtx CodegenContext, dir string) BazelTargets {
bazelTargetsMap, _ := GenerateBazelTargets(codegenCtx)
return bazelTargetsMap[dir]
}
// Helper method to trim quotes around strings.

22
bp2build/build_conversion_test.go
View File

@@ -194,6 +194,7 @@ func TestGenerateSoongModuleTargets(t *testing.T) {
for _, testCase := range testCases {
config := android.TestConfig(buildDir, nil, testCase.bp, nil)
ctx := android.NewTestContext(config)
ctx.RegisterModuleType("custom", customModuleFactory)
ctx.Register()
@@ -202,7 +203,8 @@ func TestGenerateSoongModuleTargets(t *testing.T) {
_, errs = ctx.PrepareBuildActions(config)
android.FailIfErrored(t, errs)
bazelTargets := GenerateBazelTargets(ctx.Context.Context, QueryView)[dir]
codegenCtx := NewCodegenContext(config, *ctx.Context, QueryView)
bazelTargets := GenerateBazelTargetsForDir(codegenCtx, dir)
if actualCount, expectedCount := len(bazelTargets), 1; actualCount != expectedCount {
t.Fatalf("Expected %d bazel target, got %d", expectedCount, actualCount)
}
@@ -245,6 +247,7 @@ func TestGenerateBazelTargetModules(t *testing.T) {
for _, testCase := range testCases {
config := android.TestConfig(buildDir, nil, testCase.bp, nil)
ctx := android.NewTestContext(config)
ctx.RegisterModuleType("custom", customModuleFactory)
ctx.RegisterBp2BuildMutator("custom", customBp2BuildMutator)
ctx.RegisterForBazelConversion()
@@ -258,7 +261,9 @@ func TestGenerateBazelTargetModules(t *testing.T) {
continue
}
bazelTargets := GenerateBazelTargets(ctx.Context.Context, Bp2Build)[dir]
codegenCtx := NewCodegenContext(config, *ctx.Context, Bp2Build)
bazelTargets := GenerateBazelTargetsForDir(codegenCtx, dir)
if actualCount, expectedCount := len(bazelTargets), 1; actualCount != expectedCount {
t.Errorf("Expected %d bazel target, got %d", expectedCount, actualCount)
} else {
@@ -415,7 +420,8 @@ load("//build/bazel/rules:rules.bzl", "my_library")`,
_, errs = ctx.ResolveDependencies(config)
android.FailIfErrored(t, errs)
bazelTargets := GenerateBazelTargets(ctx.Context.Context, Bp2Build)[dir]
codegenCtx := NewCodegenContext(config, *ctx.Context, Bp2Build)
bazelTargets := GenerateBazelTargetsForDir(codegenCtx, dir)
if actualCount := len(bazelTargets); actualCount != testCase.expectedBazelTargetCount {
t.Fatalf("Expected %d bazel target, got %d", testCase.expectedBazelTargetCount, actualCount)
}
@@ -904,7 +910,9 @@ genrule {
if testCase.dir != "" {
checkDir = testCase.dir
}
bazelTargets := GenerateBazelTargets(ctx.Context.Context, Bp2Build)[checkDir]
codegenCtx := NewCodegenContext(config, *ctx.Context, Bp2Build)
bazelTargets := GenerateBazelTargetsForDir(codegenCtx, checkDir)
if actualCount, expectedCount := len(bazelTargets), len(testCase.expectedBazelTargets); actualCount != expectedCount {
t.Errorf("%s: Expected %d bazel target, got %d", testCase.description, expectedCount, actualCount)
} else {
@@ -1118,7 +1126,8 @@ genrule {
_, errs = ctx.ResolveDependencies(config)
android.FailIfErrored(t, errs)
bazelTargets := GenerateBazelTargets(ctx.Context.Context, Bp2Build)[dir]
codegenCtx := NewCodegenContext(config, *ctx.Context, Bp2Build)
bazelTargets := GenerateBazelTargetsForDir(codegenCtx, dir)
if actualCount := len(bazelTargets); actualCount != 1 {
t.Fatalf("%s: Expected 1 bazel target, got %d", testCase.description, actualCount)
}
@@ -1205,7 +1214,8 @@ func TestAllowlistingBp2buildTargets(t *testing.T) {
_, errs = ctx.ResolveDependencies(config)
android.FailIfErrored(t, errs)
bazelTargets := GenerateBazelTargets(ctx.Context.Context, Bp2Build)[dir]
codegenCtx := NewCodegenContext(config, *ctx.Context, Bp2Build)
bazelTargets := GenerateBazelTargetsForDir(codegenCtx, dir)
if actualCount := len(bazelTargets); actualCount != testCase.expectedCount {
t.Fatalf("%s: Expected %d bazel target, got %d", testCase.description, testCase.expectedCount, actualCount)
}

3
bp2build/cc_library_headers_conversion_test.go
View File

@@ -202,7 +202,8 @@ cc_library_headers {
if testCase.dir != "" {
checkDir = testCase.dir
}
bazelTargets := GenerateBazelTargets(ctx.Context.Context, Bp2Build)[checkDir]
codegenCtx := NewCodegenContext(config, *ctx.Context, Bp2Build)
bazelTargets := GenerateBazelTargetsForDir(codegenCtx, checkDir)
if actualCount, expectedCount := len(bazelTargets), len(testCase.expectedBazelTargets); actualCount != expectedCount {
t.Errorf("%s: Expected %d bazel target, got %d", testCase.description, expectedCount, actualCount)
} else {

3
bp2build/cc_object_conversion_test.go
View File

@@ -166,7 +166,8 @@ cc_defaults {
continue
}
bazelTargets := GenerateBazelTargets(ctx.Context.Context, Bp2Build)[dir]
codegenCtx := NewCodegenContext(config, *ctx.Context, Bp2Build)
bazelTargets := GenerateBazelTargetsForDir(codegenCtx, dir)
if actualCount, expectedCount := len(bazelTargets), len(testCase.expectedBazelTargets); actualCount != expectedCount {
fmt.Println(bazelTargets)
t.Errorf("%s: Expected %d bazel target, got %d", testCase.description, expectedCount, actualCount)

30
bp2build/metrics.go Normal file
View File

@@ -0,0 +1,30 @@
package bp2build
import (
"android/soong/android"
"fmt"
)
// Simple metrics struct to collect information about a Blueprint to BUILD
// conversion process.
type CodegenMetrics struct {
// Total number of Soong/Blueprint modules
TotalModuleCount int
// Counts of generated Bazel targets per Bazel rule class
RuleClassCount map[string]int
}
// Print the codegen metrics to stdout.
func (metrics CodegenMetrics) Print() {
generatedTargetCount := 0
for _, ruleClass := range android.SortedStringKeys(metrics.RuleClassCount) {
count := metrics.RuleClassCount[ruleClass]
fmt.Printf("[bp2build] %s: %d targets\n", ruleClass, count)
generatedTargetCount += count
}
fmt.Printf(
"[bp2build] Generated %d total BUILD targets from %d Android.bp modules.\n",
generatedTargetCount,
metrics.TotalModuleCount)
}

3
bp2build/sh_conversion_test.go
View File

@@ -115,7 +115,8 @@ func TestShBinaryBp2Build(t *testing.T) {
if testCase.dir != "" {
checkDir = testCase.dir
}
bazelTargets := GenerateBazelTargets(ctx.Context.Context, Bp2Build)[checkDir]
codegenCtx := NewCodegenContext(config, *ctx.Context, Bp2Build)
bazelTargets := GenerateBazelTargetsForDir(codegenCtx, checkDir)
if actualCount, expectedCount := len(bazelTargets), len(testCase.expectedBazelTargets); actualCount != expectedCount {
t.Errorf("%s: Expected %d bazel target, got %d", testCase.description, expectedCount, actualCount)
} else {

14
cmd/soong_build/main.go
View File

@@ -134,7 +134,9 @@ func main() {
// Convert the Soong module graph into Bazel BUILD files.
if bazelQueryViewDir != "" {
if err := createBazelQueryView(ctx, bazelQueryViewDir); err != nil {
// Run the code-generation phase to convert BazelTargetModules to BUILD files.
codegenContext := bp2build.NewCodegenContext(configuration, *ctx, bp2build.QueryView)
if err := createBazelQueryView(codegenContext, bazelQueryViewDir); err != nil {
fmt.Fprintf(os.Stderr, "%s", err)
os.Exit(1)
}
@@ -188,9 +190,15 @@ func runBp2Build(srcDir string, configuration android.Config) {
// from the regular Modules.
bootstrap.Main(bp2buildCtx.Context, configuration, extraNinjaDeps...)
// Run the code-generation phase to convert BazelTargetModules to BUILD files.
// Run the code-generation phase to convert BazelTargetModules to BUILD files
// and print conversion metrics to the user.
codegenContext := bp2build.NewCodegenContext(configuration, *bp2buildCtx, bp2build.Bp2Build)
bp2build.Codegen(codegenContext)
metrics := bp2build.Codegen(codegenContext)
// Only report metrics when in bp2build mode. The metrics aren't relevant
// for queryview, since that's a total repo-wide conversion and there's a
// 1:1 mapping for each module.
metrics.Print()
// Workarounds to support running bp2build in a clean AOSP checkout with no
// prior builds, and exiting early as soon as the BUILD files get generated,

7
cmd/soong_build/queryview.go
View File

@@ -22,9 +22,12 @@ import (
"path/filepath"
)
func createBazelQueryView(ctx *android.Context, bazelQueryViewDir string) error {
func createBazelQueryView(ctx bp2build.CodegenContext, bazelQueryViewDir string) error {
ruleShims := bp2build.CreateRuleShims(android.ModuleTypeFactories())
buildToTargets := bp2build.GenerateBazelTargets(*ctx, bp2build.QueryView)
// Ignore metrics reporting for queryview, since queryview is already a full-repo
// conversion and can use data from bazel query directly.
buildToTargets, _ := bp2build.GenerateBazelTargets(ctx)
filesToWrite := bp2build.CreateBazelFiles(ruleShims, buildToTargets, bp2build.QueryView)
for _, f := range filesToWrite {