/**
* Note that if this Parser is populated via {@link #filterAllTargetsInProject}, then this method
* should not be called.
*/
private void parseBuildFileContainingTarget(
BuildTarget buildTarget,
Iterable<String> defaultIncludes,
ProjectBuildFileParser buildFileParser)
throws BuildFileParseException, BuildTargetException, IOException {
if (isCacheComplete(defaultIncludes)) {
// In this case, all of the build rules should have been loaded into the knownBuildTargets
// Map before this method was invoked. Therefore, there should not be any more build files to
// parse. This must be the result of traversing a non-existent dep in a build rule, so an
// error is reported to the user. Unfortunately, the source of the build file where the
// non-existent rule was declared is not known at this point, which is why it is not included
// in the error message.
throw new HumanReadableException("No such build target: %s.", buildTarget);
}
File buildFile = buildTarget.getBuildFile(projectFilesystem);
if (isCached(buildFile, defaultIncludes)) {
throw new HumanReadableException(
"The build file that should contain %s has already been parsed (%s), "
+ "but %s was not found. Please make sure that %s is defined in %s.",
buildTarget, buildFile, buildTarget, buildTarget, buildFile);
}
parseBuildFile(buildFile, defaultIncludes, buildFileParser);
}
/**
* @param buildTargets the build targets to generate a dependency graph for.
* @param defaultIncludes the files to include before executing build files.
* @param eventBus used to log events while parsing.
* @return the dependency graph containing the build targets and their related targets.
*/
public DependencyGraph parseBuildFilesForTargets(
Iterable<BuildTarget> buildTargets, Iterable<String> defaultIncludes, BuckEventBus eventBus)
throws BuildFileParseException, BuildTargetException, IOException {
// Make sure that knownBuildTargets is initially populated with the BuildRuleBuilders for the
// seed BuildTargets for the traversal.
eventBus.post(ParseEvent.started(buildTargets));
DependencyGraph graph = null;
try (ProjectBuildFileParser buildFileParser =
buildFileParserFactory.createParser(defaultIncludes)) {
if (!isCacheComplete(defaultIncludes)) {
Set<File> buildTargetFiles = Sets.newHashSet();
for (BuildTarget buildTarget : buildTargets) {
File buildFile = buildTarget.getBuildFile(projectFilesystem);
boolean isNewElement = buildTargetFiles.add(buildFile);
if (isNewElement) {
parseBuildFile(buildFile, defaultIncludes, buildFileParser);
}
}
}
graph = findAllTransitiveDependencies(buildTargets, defaultIncludes, buildFileParser);
return graph;
} finally {
eventBus.post(ParseEvent.finished(buildTargets, Optional.fromNullable(graph)));
}
}