Examples with FileHashCache com.facebook.buck.util.cache.FileHashCache used on opensource projects

Example 46 with FileHashCache

use of com.facebook.buck.util.cache.FileHashCache in project buck by facebook.

the class ExportFileTest method modifyingTheContentsOfTheFileChangesTheRuleKey.

@Test
public void modifyingTheContentsOfTheFileChangesTheRuleKey() throws Exception {
    Path root = Files.createTempDirectory("root");
    FakeProjectFilesystem filesystem = new FakeProjectFilesystem(root);
    Path temp = Paths.get("example_file");
    FileHashCache hashCache = new StackedFileHashCache(ImmutableList.of(DefaultFileHashCache.createDefaultFileHashCache(filesystem)));
    SourcePathRuleFinder ruleFinder = new SourcePathRuleFinder(new BuildRuleResolver(TargetGraph.EMPTY, new DefaultTargetNodeToBuildRuleTransformer()));
    SourcePathResolver resolver = new SourcePathResolver(ruleFinder);
    DefaultRuleKeyFactory ruleKeyFactory = new DefaultRuleKeyFactory(0, hashCache, resolver, ruleFinder);
    filesystem.writeContentsToPath("I like cheese", temp);
    ExportFileBuilder builder = ExportFileBuilder.newExportFileBuilder(BuildTargetFactory.newInstance("//some:file")).setSrc(new PathSourcePath(filesystem, temp));
    ExportFile rule = builder.build(new BuildRuleResolver(TargetGraph.EMPTY, new DefaultTargetNodeToBuildRuleTransformer()), filesystem);
    RuleKey original = ruleKeyFactory.build(rule);
    filesystem.writeContentsToPath("I really like cheese", temp);
    // Create a new rule. The FileHashCache held by the existing rule will retain a reference to the
    // previous content of the file, so we need to create an identical rule.
    rule = builder.build(new BuildRuleResolver(TargetGraph.EMPTY, new DefaultTargetNodeToBuildRuleTransformer()), filesystem);
    hashCache = new StackedFileHashCache(ImmutableList.of(DefaultFileHashCache.createDefaultFileHashCache(filesystem)));
    ruleFinder = new SourcePathRuleFinder(new BuildRuleResolver(TargetGraph.EMPTY, new DefaultTargetNodeToBuildRuleTransformer()));
    resolver = new SourcePathResolver(ruleFinder);
    ruleKeyFactory = new DefaultRuleKeyFactory(0, hashCache, resolver, ruleFinder);
    RuleKey refreshed = ruleKeyFactory.build(rule);
    assertNotEquals(original, refreshed);
}