/**
* Invalidates the cached build rules if {@code includes} have changed since the last call. If the
* cache is invalidated the new {@code includes} used to build the new cache are stored.
*
* @param includes the files to include before executing the build file.
* @return true if the cache was invalidated, false if the cache is still valid.
*/
private synchronized boolean invalidateCacheOnIncludeChange(Iterable<String> includes) {
List<String> includesList = Lists.newArrayList(includes);
if (!includesList.equals(this.cacheDefaultIncludes)) {
invalidateCache();
this.cacheDefaultIncludes = includesList;
return true;
}
return false;
}
/**
* Called when file change events are posted to the file change EventBus to invalidate cached
* build rules if required.
*/
@Subscribe
public synchronized void onFileSystemChange(WatchEvent<?> event) throws IOException {
if (console.getVerbosity() == Verbosity.ALL) {
console
.getStdErr()
.printf(
"Parser watched event %s %s\n",
event.kind(), projectFilesystem.createContextString(event));
}
if (projectFilesystem.isPathChangeEvent(event)) {
Path path = (Path) event.context();
if (isPathCreateOrDeleteEvent(event)) {
if (path.endsWith(BuckConstant.BUILD_RULES_FILE_NAME)) {
// If a build file has been added or removed, reconstruct the build file tree.
buildFileTreeCache.invalidate();
}
// Added or removed files can affect globs, so invalidate the package build file
// "containing" {@code path} unless its filename matches a temp file pattern.
if (!isTempFile(path)) {
invalidateContainingBuildFile(path);
}
}
// Invalidate the raw rules and targets dependent on this file.
invalidateDependents(path);
} else {
// Non-path change event, likely an overflow due to many change events: invalidate everything.
buildFileTreeCache.invalidate();
invalidateCache();
}
}