/**
* Looks through filtered drawables for files not of the target density and replaces them with
* scaled versions.
*
* <p>Any drawables found by this step didn't have equivalents in the target density. If they are
* of a higher density, we can replicate what Android does and downscale them at compile-time.
*/
private void scaleUnmatchedDrawables(ExecutionContext context)
throws IOException, InterruptedException {
ResourceFilters.Density targetDensity = ResourceFilters.Density.ORDERING.max(targetDensities);
// Go over all the images that remain after filtering.
Preconditions.checkNotNull(drawableFinder);
Collection<Path> drawables =
drawableFinder.findDrawables(inResDirToOutResDirMap.values(), filesystem);
for (Path drawable : drawables) {
if (drawable.toString().endsWith(".9.png")) {
// Skip nine-patch for now.
continue;
}
ResourceFilters.Qualifiers qualifiers = new ResourceFilters.Qualifiers(drawable);
ResourceFilters.Density density = qualifiers.density;
// If the image has a qualifier but it's not the right one.
Preconditions.checkNotNull(targetDensities);
if (!targetDensities.contains(density)) {
// Replace density qualifier with target density using regular expression to match
// the qualifier in the context of a path to a drawable.
String fromDensity =
(density == ResourceFilters.Density.NO_QUALIFIER ? "" : "-") + density.toString();
Path destination =
Paths.get(
MorePaths.pathWithUnixSeparators(drawable)
.replaceFirst(
"((?:^|/)drawable[^/]*)" + Pattern.quote(fromDensity) + "(-|$|/)",
"$1-" + targetDensity + "$2"));
double factor = targetDensity.value() / density.value();
if (factor >= 1.0) {
// There is no point in up-scaling, or converting between drawable and drawable-mdpi.
continue;
}
// Make sure destination folder exists and perform downscaling.
filesystem.createParentDirs(destination);
Preconditions.checkNotNull(imageScaler);
imageScaler.scale(factor, drawable, destination, context);
// Delete source file.
filesystem.deleteFileAtPath(drawable);
// Delete newly-empty directories to prevent missing resources errors in apkbuilder.
Path parent = drawable.getParent();
if (filesystem.listFiles(parent).length == 0) {
filesystem.deleteFileAtPath(parent);
}
}
}
}
private int handleGet(Request baseRequest, HttpServletResponse response) throws IOException {
if (!artifactCache.isPresent()) {
response.getWriter().write("Serving local cache is disabled for this instance.");
return HttpServletResponse.SC_INTERNAL_SERVER_ERROR;
}
String path = baseRequest.getUri().getPath();
String[] pathElements = path.split("/");
if (pathElements.length != 4 || !pathElements[2].equals("key")) {
response.getWriter().write("Incorrect url format.");
return HttpServletResponse.SC_INTERNAL_SERVER_ERROR;
}
RuleKey ruleKey = RuleKey.TO_RULE_KEY.apply(pathElements[3]);
Path temp = null;
try {
temp =
projectFilesystem.createTempFile(BuckConstant.SCRATCH_PATH, "outgoing_rulekey", ".tmp");
projectFilesystem.createParentDirs(temp);
CacheResult fetchResult;
try {
fetchResult = artifactCache.get().fetch(ruleKey, temp);
} catch (InterruptedException e) {
LOG.error(e, "Interrupted when fetching from local cache.");
e.printStackTrace(response.getWriter());
return HttpServletResponse.SC_INTERNAL_SERVER_ERROR;
}
if (!fetchResult.getType().isSuccess()) {
return HttpServletResponse.SC_NOT_FOUND;
}
final Path tempFinal = temp;
HttpArtifactCacheBinaryProtocol.FetchResponse fetchResponse =
new HttpArtifactCacheBinaryProtocol.FetchResponse(
ImmutableSet.of(ruleKey),
fetchResult.getMetadata(),
new ByteSource() {
@Override
public InputStream openStream() throws IOException {
return projectFilesystem.newFileInputStream(tempFinal);
}
});
fetchResponse.write(response.getOutputStream());
response.setContentLengthLong(fetchResponse.getContentLength());
return HttpServletResponse.SC_OK;
} finally {
if (temp != null) {
projectFilesystem.deleteFileAtPathIfExists(temp);
}
}
}
@Test
public void testDeleteFiles() throws IOException {
ProjectFilesystem projectFilesystem = new ProjectFilesystem(tmpDir.getRoot().toPath());
String tracePath = String.format("%s/build.trace", BuckConstant.BUCK_TRACE_DIR);
File traceFile = new File(tmpDir.getRoot(), tracePath);
projectFilesystem.createParentDirs(tracePath);
traceFile.createNewFile();
traceFile.setLastModified(0);
for (int i = 0; i < 10; ++i) {
File oldResult =
new File(
tmpDir.getRoot(),
String.format("%s/build.100%d.trace", BuckConstant.BUCK_TRACE_DIR, i));
oldResult.createNewFile();
oldResult.setLastModified(TimeUnit.SECONDS.toMillis(i));
}
ChromeTraceBuildListener listener =
new ChromeTraceBuildListener(
projectFilesystem,
new FakeClock(1409702151000000000L),
new ObjectMapper(),
Locale.US,
TimeZone.getTimeZone("America/Los_Angeles"),
/* tracesToKeep */ 3,
false);
listener.deleteOldTraces();
ImmutableList<String> files =
FluentIterable.from(Arrays.asList(projectFilesystem.listFiles(BuckConstant.BUCK_TRACE_DIR)))
.transform(
new Function<File, String>() {
@Override
public String apply(File input) {
return input.getName();
}
})
.toList();
assertEquals(4, files.size());
assertEquals(
ImmutableSortedSet.of(
"build.trace", "build.1009.trace", "build.1008.trace", "build.1007.trace"),
ImmutableSortedSet.copyOf(files));
}
private CacheResult tryToFetchArtifactFromBuildCacheAndOverlayOnTopOfProjectFilesystem(
BuildRule rule,
RuleKey ruleKey,
BuildInfoRecorder buildInfoRecorder,
ArtifactCache artifactCache,
ProjectFilesystem filesystem,
BuildContext buildContext)
throws InterruptedException {
// Create a temp file whose extension must be ".zip" for Filesystems.newFileSystem() to infer
// that we are creating a zip-based FileSystem.
Path zipFile;
try {
zipFile =
Files.createTempFile(
"buck_artifact_" + MoreFiles.sanitize(rule.getBuildTarget().getShortName()), ".zip");
} catch (IOException e) {
throw new RuntimeException(e);
}
// TODO(mbolin): Change ArtifactCache.fetch() so that it returns a File instead of takes one.
// Then we could download directly from the remote cache into the on-disk cache and unzip it
// from there.
CacheResult cacheResult =
buildInfoRecorder.fetchArtifactForBuildable(ruleKey, zipFile, artifactCache);
if (!cacheResult.getType().isSuccess()) {
try {
Files.delete(zipFile);
} catch (IOException e) {
LOG.warn(e, "failed to delete %s", zipFile);
}
return cacheResult;
}
// We unzip the file in the root of the project directory.
// Ideally, the following would work:
//
// Path pathToZip = Paths.get(zipFile.getAbsolutePath());
// FileSystem fs = FileSystems.newFileSystem(pathToZip, /* loader */ null);
// Path root = Iterables.getOnlyElement(fs.getRootDirectories());
// MoreFiles.copyRecursively(root, projectRoot);
//
// Unfortunately, this does not appear to work, in practice, because MoreFiles fails when trying
// to resolve a Path for a zip entry against a file Path on disk.
ArtifactCacheEvent.Started started =
ArtifactCacheEvent.started(
ArtifactCacheEvent.Operation.DECOMPRESS, ImmutableSet.of(ruleKey));
buildContext.getEventBus().post(started);
try {
Unzip.extractZipFile(
zipFile.toAbsolutePath(),
filesystem,
Unzip.ExistingFileMode.OVERWRITE_AND_CLEAN_DIRECTORIES);
// We only delete the ZIP file when it has been unzipped successfully. Otherwise, we leave it
// around for debugging purposes.
Files.delete(zipFile);
if (cacheResult.getType() == CacheResult.Type.HIT) {
// If we have a hit, also write out the build metadata.
Path metadataDir = BuildInfo.getPathToMetadataDirectory(rule.getBuildTarget());
for (Map.Entry<String, String> ent : cacheResult.getMetadata().entrySet()) {
Path dest = metadataDir.resolve(ent.getKey());
filesystem.createParentDirs(dest);
filesystem.writeContentsToPath(ent.getValue(), dest);
}
}
} catch (IOException e) {
// In the wild, we have seen some inexplicable failures during this step. For now, we try to
// give the user as much information as we can to debug the issue, but return CacheResult.MISS
// so that Buck will fall back on doing a local build.
buildContext
.getEventBus()
.post(
ConsoleEvent.warning(
"Failed to unzip the artifact for %s at %s.\n"
+ "The rule will be built locally, "
+ "but here is the stacktrace of the failed unzip call:\n"
+ rule.getBuildTarget(),
zipFile.toAbsolutePath(),
Throwables.getStackTraceAsString(e)));
return CacheResult.miss();
} finally {
buildContext.getEventBus().post(ArtifactCacheEvent.finished(started));
}
return cacheResult;
}
