Transform paths to headers in include dirs to take package boundaries into account.
This allows the following cc_library_static targets to build with bp2build:
- libc_freebsd
- libc_freebsd_large_stack
- libc_openbsd_ndk
- libc_gdtoa (* but still fails for mixed builds)
- libc_aeabi
- libc_static_dispatch
- libc_dynamic_dispatch
This also allows a number of other cc_library_static targets to progress further in their builds.
Test: Added unit test
Test: bp2build-sync.py write; bazel build //bionic/...
Change-Id: I71742565c16594448a41a6428a5c993171ec4cb4
diff --git a/android/paths.go b/android/paths.go
index df12228..d770823 100644
--- a/android/paths.go
+++ b/android/paths.go
@@ -416,6 +416,93 @@
return labels
}
+// Returns true if a prefix + components[:i] + /Android.bp exists
+// TODO(b/185358476) Could check for BUILD file instead of checking for Android.bp file, or ensure BUILD is always generated?
+func directoryHasBlueprint(fs pathtools.FileSystem, prefix string, components []string, componentIndex int) bool {
+ blueprintPath := prefix
+ if blueprintPath != "" {
+ blueprintPath = blueprintPath + "/"
+ }
+ blueprintPath = blueprintPath + strings.Join(components[:componentIndex+1], "/")
+ blueprintPath = blueprintPath + "/Android.bp"
+ if exists, _, _ := fs.Exists(blueprintPath); exists {
+ return true
+ } else {
+ return false
+ }
+}
+
+// Transform a path (if necessary) to acknowledge package boundaries
+//
+// e.g. something like
+// async_safe/include/async_safe/CHECK.h
+// might become
+// //bionic/libc/async_safe:include/async_safe/CHECK.h
+// if the "async_safe" directory is actually a package and not just a directory.
+//
+// In particular, paths that extend into packages are transformed into absolute labels beginning with //.
+func transformSubpackagePath(ctx BazelConversionPathContext, path bazel.Label) bazel.Label {
+ var newPath bazel.Label
+
+ // Don't transform Bp_text
+ newPath.Bp_text = path.Bp_text
+
+ if strings.HasPrefix(path.Label, "//") {
+ // Assume absolute labels are already correct (e.g. //path/to/some/package:foo.h)
+ newPath.Label = path.Label
+ return newPath
+ }
+
+ newLabel := ""
+ pathComponents := strings.Split(path.Label, "/")
+ foundBlueprint := false
+ // Check the deepest subdirectory first and work upwards
+ for i := len(pathComponents) - 1; i >= 0; i-- {
+ pathComponent := pathComponents[i]
+ var sep string
+ if !foundBlueprint && directoryHasBlueprint(ctx.Config().fs, ctx.ModuleDir(), pathComponents, i) {
+ sep = ":"
+ foundBlueprint = true
+ } else {
+ sep = "/"
+ }
+ if newLabel == "" {
+ newLabel = pathComponent
+ } else {
+ newLabel = pathComponent + sep + newLabel
+ }
+ }
+ if foundBlueprint {
+ // Ensure paths end up looking like //bionic/... instead of //./bionic/...
+ moduleDir := ctx.ModuleDir()
+ if strings.HasPrefix(moduleDir, ".") {
+ moduleDir = moduleDir[1:]
+ }
+ // Make the path into an absolute label (e.g. //bionic/libc/foo:bar.h instead of just foo:bar.h)
+ if moduleDir == "" {
+ newLabel = "//" + newLabel
+ } else {
+ newLabel = "//" + moduleDir + "/" + newLabel
+ }
+ }
+ newPath.Label = newLabel
+
+ return newPath
+}
+
+// Transform paths to acknowledge package boundaries
+// See transformSubpackagePath() for more information
+func transformSubpackagePaths(ctx BazelConversionPathContext, paths bazel.LabelList) bazel.LabelList {
+ var newPaths bazel.LabelList
+ for _, include := range paths.Includes {
+ newPaths.Includes = append(newPaths.Includes, transformSubpackagePath(ctx, include))
+ }
+ for _, exclude := range paths.Excludes {
+ newPaths.Excludes = append(newPaths.Excludes, transformSubpackagePath(ctx, exclude))
+ }
+ return newPaths
+}
+
// BazelLabelForModuleSrc returns bazel.LabelList with paths rooted from the module's local source
// directory. It expands globs, and resolves references to modules using the ":name" syntax to
// bazel-compatible labels. Properties passed as the paths or excludes argument must have been
@@ -445,6 +532,7 @@
}
labels := expandSrcsForBazel(ctx, paths, excluded)
labels.Excludes = excludeLabels.Includes
+ labels = transformSubpackagePaths(ctx, labels)
return labels
}