bp2build: reference static variants directly
Previously, when referencing a cc_library as a static_lib from a
converted module, the corresponding target would depend on the "root
target" of that cc_library. This resulted in a superfluous dependency on
the shared target of the cc_library dependency. This superfluous
dependency could sometimes result in cycles.
This change ensures the static target name is directly specified in such
cases.
Test: mixed_libc.sh CI
Test: USE_BAZEL_ANALYSIS=1 m fmtlib
Change-Id: I36ee9f0a9017b1e9d73df9e3174669107f0afd4f
diff --git a/android/bazel.go b/android/bazel.go
index 8341e57..9cebc80 100644
--- a/android/bazel.go
+++ b/android/bazel.go
@@ -259,7 +259,6 @@
// Per-module denylist of cc_library modules to only generate the static
// variant if their shared variant isn't ready or buildable by Bazel.
bp2buildCcLibraryStaticOnlyList = []string{
- "libstdc++", // http://b/186822597, cc_library, ld.lld: error: undefined symbol: __errno
"libjemalloc5", // http://b/188503688, cc_library, `target: { android: { enabled: false } }` for android targets.
}
@@ -294,8 +293,8 @@
}
}
-func GenerateCcLibraryStaticOnly(ctx BazelConversionPathContext) bool {
- return bp2buildCcLibraryStaticOnly[ctx.Module().Name()]
+func GenerateCcLibraryStaticOnly(moduleName string) bool {
+ return bp2buildCcLibraryStaticOnly[moduleName]
}
func ShouldKeepExistingBuildFileForDir(dir string) bool {
@@ -325,7 +324,7 @@
return false
}
- if GenerateCcLibraryStaticOnly(ctx) {
+ if GenerateCcLibraryStaticOnly(ctx.Module().Name()) {
// Don't use partially-converted cc_library targets in mixed builds,
// since mixed builds would generally rely on both static and shared
// variants of a cc_library.
diff --git a/android/bazel_paths.go b/android/bazel_paths.go
index ccbc156..b5746f7 100644
--- a/android/bazel_paths.go
+++ b/android/bazel_paths.go
@@ -15,11 +15,12 @@
package android
import (
- "android/soong/bazel"
"fmt"
"path/filepath"
"strings"
+ "android/soong/bazel"
+
"github.com/google/blueprint"
"github.com/google/blueprint/pathtools"
)
@@ -84,24 +85,8 @@
// BazelLabelForModuleDeps expects a list of reference to other modules, ("<module>"
// or ":<module>") and returns a Bazel-compatible label which corresponds to dependencies on the
// module within the given ctx.
-func BazelLabelForModuleDeps(ctx BazelConversionPathContext, modules []string) bazel.LabelList {
- return bazelLabelForModuleDeps(ctx, modules, false)
-}
-
-// BazelLabelForModuleWholeDeps expects a list of references to other modules, ("<module>"
-// or ":<module>") and returns a Bazel-compatible label which corresponds to dependencies on the
-// module within the given ctx, where prebuilt dependencies will be appended with _alwayslink so
-// they can be handled as whole static libraries.
-func BazelLabelForModuleWholeDeps(ctx BazelConversionPathContext, modules []string) bazel.LabelList {
- return bazelLabelForModuleDeps(ctx, modules, true)
-}
-
-// BazelLabelForModuleDepsExcludes expects two lists: modules (containing modules to include in the
-// list), and excludes (modules to exclude from the list). Both of these should contain references
-// to other modules, ("<module>" or ":<module>"). It returns a Bazel-compatible label list which
-// corresponds to dependencies on the module within the given ctx, and the excluded dependencies.
-func BazelLabelForModuleDepsExcludes(ctx BazelConversionPathContext, modules, excludes []string) bazel.LabelList {
- return bazelLabelForModuleDepsExcludes(ctx, modules, excludes, false)
+func BazelLabelForModuleDeps(ctx TopDownMutatorContext, modules []string) bazel.LabelList {
+ return BazelLabelForModuleDepsWithFn(ctx, modules, BazelModuleLabel)
}
// BazelLabelForModuleWholeDepsExcludes expects two lists: modules (containing modules to include in
@@ -110,11 +95,15 @@
// list which corresponds to dependencies on the module within the given ctx, and the excluded
// dependencies. Prebuilt dependencies will be appended with _alwayslink so they can be handled as
// whole static libraries.
-func BazelLabelForModuleWholeDepsExcludes(ctx BazelConversionPathContext, modules, excludes []string) bazel.LabelList {
- return bazelLabelForModuleDepsExcludes(ctx, modules, excludes, true)
+func BazelLabelForModuleDepsExcludes(ctx TopDownMutatorContext, modules, excludes []string) bazel.LabelList {
+ return BazelLabelForModuleDepsExcludesWithFn(ctx, modules, excludes, BazelModuleLabel)
}
-func bazelLabelForModuleDeps(ctx BazelConversionPathContext, modules []string, isWholeLibs bool) bazel.LabelList {
+// BazelLabelForModuleDepsWithFn expects a list of reference to other modules, ("<module>"
+// or ":<module>") and applies moduleToLabelFn to determine and return a Bazel-compatible label
+// which corresponds to dependencies on the module within the given ctx.
+func BazelLabelForModuleDepsWithFn(ctx TopDownMutatorContext, modules []string,
+ moduleToLabelFn func(TopDownMutatorContext, blueprint.Module) string) bazel.LabelList {
var labels bazel.LabelList
// In some cases, a nil string list is different than an explicitly empty list.
if len(modules) == 0 && modules != nil {
@@ -127,7 +116,7 @@
module = ":" + module
}
if m, t := SrcIsModuleWithTag(module); m != "" {
- l := getOtherModuleLabel(ctx, m, t, isWholeLibs)
+ l := getOtherModuleLabel(ctx, m, t, moduleToLabelFn)
l.OriginalModuleName = bpText
labels.Includes = append(labels.Includes, l)
} else {
@@ -137,23 +126,29 @@
return labels
}
-func bazelLabelForModuleDepsExcludes(ctx BazelConversionPathContext, modules, excludes []string, isWholeLibs bool) bazel.LabelList {
- moduleLabels := bazelLabelForModuleDeps(ctx, RemoveListFromList(modules, excludes), isWholeLibs)
+// BazelLabelForModuleDepsExcludesWithFn expects two lists: modules (containing modules to include in the
+// list), and excludes (modules to exclude from the list). Both of these should contain references
+// to other modules, ("<module>" or ":<module>"). It applies moduleToLabelFn to determine and return a
+// Bazel-compatible label list which corresponds to dependencies on the module within the given ctx, and
+// the excluded dependencies.
+func BazelLabelForModuleDepsExcludesWithFn(ctx TopDownMutatorContext, modules, excludes []string,
+ moduleToLabelFn func(TopDownMutatorContext, blueprint.Module) string) bazel.LabelList {
+ moduleLabels := BazelLabelForModuleDepsWithFn(ctx, RemoveListFromList(modules, excludes), moduleToLabelFn)
if len(excludes) == 0 {
return moduleLabels
}
- excludeLabels := bazelLabelForModuleDeps(ctx, excludes, isWholeLibs)
+ excludeLabels := BazelLabelForModuleDepsWithFn(ctx, excludes, moduleToLabelFn)
return bazel.LabelList{
Includes: moduleLabels.Includes,
Excludes: excludeLabels.Includes,
}
}
-func BazelLabelForModuleSrcSingle(ctx BazelConversionPathContext, path string) bazel.Label {
+func BazelLabelForModuleSrcSingle(ctx TopDownMutatorContext, path string) bazel.Label {
return BazelLabelForModuleSrcExcludes(ctx, []string{path}, []string(nil)).Includes[0]
}
-func BazelLabelForModuleDepSingle(ctx BazelConversionPathContext, path string) bazel.Label {
+func BazelLabelForModuleDepSingle(ctx TopDownMutatorContext, path string) bazel.Label {
return BazelLabelForModuleDepsExcludes(ctx, []string{path}, []string(nil)).Includes[0]
}
@@ -163,7 +158,7 @@
// relative if within the same package).
// Properties must have been annotated with struct tag `android:"path"` so that dependencies modules
// will have already been handled by the path_deps mutator.
-func BazelLabelForModuleSrc(ctx BazelConversionPathContext, paths []string) bazel.LabelList {
+func BazelLabelForModuleSrc(ctx TopDownMutatorContext, paths []string) bazel.LabelList {
return BazelLabelForModuleSrcExcludes(ctx, paths, []string(nil))
}
@@ -173,7 +168,7 @@
// (absolute if in a different package or relative if within the same package).
// Properties must have been annotated with struct tag `android:"path"` so that dependencies modules
// will have already been handled by the path_deps mutator.
-func BazelLabelForModuleSrcExcludes(ctx BazelConversionPathContext, paths, excludes []string) bazel.LabelList {
+func BazelLabelForModuleSrcExcludes(ctx TopDownMutatorContext, paths, excludes []string) bazel.LabelList {
excludeLabels := expandSrcsForBazel(ctx, excludes, []string(nil))
excluded := make([]string, 0, len(excludeLabels.Includes))
for _, e := range excludeLabels.Includes {
@@ -293,7 +288,7 @@
// Properties passed as the paths or excludes argument must have been annotated with struct tag
// `android:"path"` so that dependencies on other modules will have already been handled by the
// path_deps mutator.
-func expandSrcsForBazel(ctx BazelConversionPathContext, paths, expandedExcludes []string) bazel.LabelList {
+func expandSrcsForBazel(ctx TopDownMutatorContext, paths, expandedExcludes []string) bazel.LabelList {
if paths == nil {
return bazel.LabelList{}
}
@@ -310,7 +305,7 @@
for _, p := range paths {
if m, tag := SrcIsModuleWithTag(p); m != "" {
- l := getOtherModuleLabel(ctx, m, tag, false)
+ l := getOtherModuleLabel(ctx, m, tag, BazelModuleLabel)
if !InList(l.Label, expandedExcludes) {
l.OriginalModuleName = fmt.Sprintf(":%s", m)
labels.Includes = append(labels.Includes, l)
@@ -341,7 +336,8 @@
// getOtherModuleLabel returns a bazel.Label for the given dependency/tag combination for the
// module. The label will be relative to the current directory if appropriate. The dependency must
// already be resolved by either deps mutator or path deps mutator.
-func getOtherModuleLabel(ctx BazelConversionPathContext, dep, tag string, isWholeLibs bool) bazel.Label {
+func getOtherModuleLabel(ctx TopDownMutatorContext, dep, tag string,
+ labelFromModule func(TopDownMutatorContext, blueprint.Module) string) bazel.Label {
m, _ := ctx.ModuleFromName(dep)
if m == nil {
panic(fmt.Errorf("No module named %q found, but was a direct dep of %q", dep, ctx.Module().Name()))
@@ -349,13 +345,11 @@
if !convertedToBazel(ctx, m) {
ctx.AddUnconvertedBp2buildDep(dep)
}
- otherLabel := bazelModuleLabel(ctx, m, tag)
- label := bazelModuleLabel(ctx, ctx.Module(), "")
- if isWholeLibs {
- if m, ok := m.(Module); ok && IsModulePrebuilt(m) {
- otherLabel += "_alwayslink"
- }
- }
+ label := BazelModuleLabel(ctx, ctx.Module())
+ otherLabel := labelFromModule(ctx, m)
+
+ // TODO(b/165114590): Convert tag (":name{.tag}") to corresponding Bazel implicit output targets.
+
if samePackage(label, otherLabel) {
otherLabel = bazelShortLabel(otherLabel)
}
@@ -365,7 +359,7 @@
}
}
-func bazelModuleLabel(ctx BazelConversionPathContext, module blueprint.Module, tag string) string {
+func BazelModuleLabel(ctx TopDownMutatorContext, module blueprint.Module) string {
// TODO(b/165114590): Convert tag (":name{.tag}") to corresponding Bazel implicit output targets.
if !convertedToBazel(ctx, module) {
return bp2buildModuleLabel(ctx, module)