예제 #1
0
  /**
   * 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));
  }