public static int parseAndWriteBuckCompatibleDepfile(
ExecutionContext context,
ProjectFilesystem filesystem,
HeaderPathNormalizer headerPathNormalizer,
HeaderVerification headerVerification,
Path sourceDepFile,
Path destDepFile,
Path inputPath,
Path outputPath)
throws IOException {
// Process the dependency file, fixing up the paths, and write it out to it's final location.
// The paths of the headers written out to the depfile are the paths to the symlinks from the
// root of the repo if the compilation included them from the header search paths pointing to
// the symlink trees, or paths to headers relative to the source file if the compilation
// included them using source relative include paths. To handle both cases we check for the
// prerequisites both in the values and the keys of the replacement map.
Logger.get(Depfiles.class).debug("Processing dependency file %s as Makefile", sourceDepFile);
ImmutableMap<String, Object> params =
ImmutableMap.<String, Object>of("input", inputPath, "output", outputPath);
try (InputStream input = filesystem.newFileInputStream(sourceDepFile);
BufferedReader reader = new BufferedReader(new InputStreamReader(input));
OutputStream output = filesystem.newFileOutputStream(destDepFile);
BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(output));
SimplePerfEvent.Scope perfEvent =
SimplePerfEvent.scope(
context.getBuckEventBus(), PerfEventId.of("depfile-parse"), params)) {
ImmutableList<String> prereqs = Depfiles.parseDepfile(reader).getPrereqs();
// Skip the first prereq, as it's the input source file.
Preconditions.checkState(inputPath.toString().equals(prereqs.get(0)));
ImmutableList<String> headers = prereqs.subList(1, prereqs.size());
for (String rawHeader : headers) {
Path header = Paths.get(rawHeader).normalize();
Optional<Path> absolutePath =
headerPathNormalizer.getAbsolutePathForUnnormalizedPath(header);
if (absolutePath.isPresent()) {
Preconditions.checkState(absolutePath.get().isAbsolute());
writer.write(absolutePath.get().toString());
writer.newLine();
} else if (headerVerification.getMode() != HeaderVerification.Mode.IGNORE
&& !headerVerification.isWhitelisted(header.toString())) {
context
.getBuckEventBus()
.post(
ConsoleEvent.create(
headerVerification.getMode() == HeaderVerification.Mode.ERROR
? Level.SEVERE
: Level.WARNING,
"%s: included an untracked header \"%s\"",
inputPath,
header));
if (headerVerification.getMode() == HeaderVerification.Mode.ERROR) {
return 1;
}
}
}
}
return 0;
}
