/**
* 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);
}
}
}
}
@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));
}