@Test
public void modifyingTheContentsOfTheFileChangesTheRuleKey() throws IOException {
Path root = Files.createTempDirectory("root");
FakeProjectFilesystem filesystem = new FakeProjectFilesystem(root.toFile());
Path temp = Paths.get("example_file");
FileHashCache hashCache = new DefaultFileHashCache(filesystem);
SourcePathResolver resolver = new SourcePathResolver(new BuildRuleResolver());
RuleKeyBuilderFactory ruleKeyFactory = new DefaultRuleKeyBuilderFactory(hashCache, resolver);
filesystem.writeContentsToPath("I like cheese", temp);
ExportFileBuilder builder =
ExportFileBuilder.newExportFileBuilder(BuildTargetFactory.newInstance("//some:file"))
.setSrc(new PathSourcePath(filesystem, temp));
ExportFile rule = (ExportFile) builder.build(new BuildRuleResolver(), filesystem);
RuleKey original = ruleKeyFactory.newInstance(rule).build();
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 = (ExportFile) builder.build(new BuildRuleResolver(), filesystem);
hashCache = new DefaultFileHashCache(filesystem);
resolver = new SourcePathResolver(new BuildRuleResolver());
ruleKeyFactory = new DefaultRuleKeyBuilderFactory(hashCache, resolver);
RuleKey refreshed = ruleKeyFactory.newInstance(rule).build();
assertNotEquals(original, refreshed);
}
@Override
public void writeLinesToPath(Iterable<String> lines, Path path, FileAttribute<?>... attrs)
throws IOException {
StringBuilder builder = new StringBuilder();
if (!Iterables.isEmpty(lines)) {
Joiner.on('\n').appendTo(builder, lines);
builder.append('\n');
}
writeContentsToPath(builder.toString(), path, attrs);
}
/** Ensure that build rules with the same inputs but different deps have unique RuleKeys. */
@Test
public void testRuleKeyDependsOnDeps() throws Exception {
FakeProjectFilesystem filesystem = new FakeProjectFilesystem();
FileHashCache hashCache = new DefaultFileHashCache(filesystem);
BuildRuleResolver ruleResolver1 =
new BuildRuleResolver(TargetGraph.EMPTY, new BuildTargetNodeToBuildRuleTransformer());
BuildRuleResolver ruleResolver2 =
new BuildRuleResolver(TargetGraph.EMPTY, new BuildTargetNodeToBuildRuleTransformer());
RuleKeyBuilderFactory ruleKeyBuilderFactory1 =
new DefaultRuleKeyBuilderFactory(hashCache, new SourcePathResolver(ruleResolver1));
RuleKeyBuilderFactory ruleKeyBuilderFactory2 =
new DefaultRuleKeyBuilderFactory(hashCache, new SourcePathResolver(ruleResolver2));
// Create a dependent build rule, //src/com/facebook/buck/cli:common.
JavaLibraryBuilder builder =
JavaLibraryBuilder.createBuilder(
BuildTargetFactory.newInstance("//src/com/facebook/buck/cli:common"));
BuildRule commonJavaLibrary = builder.build(ruleResolver1);
builder.build(ruleResolver2);
// Create a java_library() rule with no deps.
Path mainSrc = Paths.get("src/com/facebook/buck/cli/Main.java");
filesystem.mkdirs(mainSrc.getParent());
filesystem.writeContentsToPath("hello", mainSrc);
JavaLibraryBuilder javaLibraryBuilder =
JavaLibraryBuilder.createBuilder(
BuildTargetFactory.newInstance("//src/com/facebook/buck/cli:cli"))
.addSrc(mainSrc);
BuildRule libraryNoCommon = javaLibraryBuilder.build(ruleResolver1, filesystem);
// Create the same java_library() rule, but with a dep on //src/com/facebook/buck/cli:common.
javaLibraryBuilder.addDep(commonJavaLibrary.getBuildTarget());
BuildRule libraryWithCommon = javaLibraryBuilder.build(ruleResolver2, filesystem);
// Assert that the RuleKeys are distinct.
RuleKey r1 = ruleKeyBuilderFactory1.build(libraryNoCommon);
RuleKey r2 = ruleKeyBuilderFactory2.build(libraryWithCommon);
assertThat(
"Rule keys should be distinct because the deps of the rules are different.",
r1,
not(equalTo(r2)));
}
@Override
public void copyFile(Path source, Path target) throws IOException {
writeContentsToPath(readFileIfItExists(source).get(), target);
}
