private static boolean inputFilesUnderSymlink(
// We use Collection<Path> instead of Iterable<Path> to prevent
// accidentally passing in Path, since Path itself is Iterable<Path>.
Collection<Path> inputs,
ProjectFilesystem projectFilesystem,
Map<Path, Path> symlinkExistenceCache,
Map<Path, Path> newSymlinksEncountered)
throws IOException {
boolean result = false;
for (Path input : inputs) {
for (int i = 1; i < input.getNameCount(); i++) {
Path subpath = input.subpath(0, i);
Path resolvedSymlink = symlinkExistenceCache.get(subpath);
if (resolvedSymlink != null) {
LOG.debug("Detected cached symlink %s -> %s", subpath, resolvedSymlink);
newSymlinksEncountered.put(subpath, resolvedSymlink);
result = true;
} else if (projectFilesystem.isSymLink(subpath)) {
Path symlinkTarget = projectFilesystem.resolve(subpath).toRealPath();
Path relativeSymlinkTarget =
projectFilesystem.getPathRelativeToProjectRoot(symlinkTarget).or(symlinkTarget);
LOG.debug("Detected symbolic link %s -> %s", subpath, relativeSymlinkTarget);
newSymlinksEncountered.put(subpath, relativeSymlinkTarget);
symlinkExistenceCache.put(subpath, relativeSymlinkTarget);
result = true;
}
}
}
return result;
}
