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Fix package boundary in glob expansion with checked in BUILD files.

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For directories without an Android.bp file, if they contain a merged
checked in BUILD file, it becomes a package boundary in the symlink
forest. However, the current glob expansion is only aware of Android.bp
files, but not merged BUILD files, so it generates glob expansions
incorrectly for files that cross the package boundary.

This CL fixes that by making the package boundary function aware of the
keepExistingBuildFile allowlist. See the new test cases for example.

Also stop using the same global bp2buildConfig for every test case to
allow each test to define their own bp2build allowlists.

Bug: 185358476
Test: new unit tests

Change-Id: Ifcd1283480a09a642ef4343e5bbc599583524577
This commit is contained in:
Jingwen Chen
2022-09-21 10:27:42 +00:00
parent 94a0373f1e
commit 0eeaeb8ef7
3 changed files with 259 additions and 74 deletions
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38
android/bazel_paths.go
View File

@@ -202,20 +202,26 @@ func BazelLabelForModuleSrcExcludes(ctx BazelConversionPathContext, paths, exclu
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 {
// Returns true if a prefix + components[:i] is a package boundary.
//
// A package boundary is determined by a BUILD file in the directory. This can happen in 2 cases:
//
// 1. An Android.bp exists, which bp2build will always convert to a sibling BUILD file.
// 2. An Android.bp doesn't exist, but a checked-in BUILD/BUILD.bazel file exists, and that file
// is allowlisted by the bp2build configuration to be merged into the symlink forest workspace.
func isPackageBoundary(config Config, prefix string, components []string, componentIndex int) bool {
prefix = filepath.Join(prefix, filepath.Join(components[:componentIndex+1]...))
if exists, _, _ := config.fs.Exists(filepath.Join(prefix, "Android.bp")); exists {
return true
} else {
return false
} else if config.Bp2buildPackageConfig.ShouldKeepExistingBuildFileForDir(prefix) {
if exists, _, _ := config.fs.Exists(filepath.Join(prefix, "BUILD")); exists {
return true
} else if exists, _, _ := config.fs.Exists(filepath.Join(prefix, "BUILD.bazel")); exists {
return true
}
}
return false
}
// Transform a path (if necessary) to acknowledge package boundaries
@@ -245,14 +251,14 @@ func transformSubpackagePath(ctx BazelConversionPathContext, path bazel.Label) b
newLabel := ""
pathComponents := strings.Split(path.Label, "/")
foundBlueprint := false
foundPackageBoundary := 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) {
if !foundPackageBoundary && isPackageBoundary(ctx.Config(), ctx.ModuleDir(), pathComponents, i) {
sep = ":"
foundBlueprint = true
foundPackageBoundary = true
} else {
sep = "/"
}
@@ -262,7 +268,7 @@ func transformSubpackagePath(ctx BazelConversionPathContext, path bazel.Label) b
newLabel = pathComponent + sep + newLabel
}
}
if foundBlueprint {
if foundPackageBoundary {
// Ensure paths end up looking like //bionic/... instead of //./bionic/...
moduleDir := ctx.ModuleDir()
if strings.HasPrefix(moduleDir, ".") {