@Nullable
private DataInputStream createFSDataStream(File dataStorageRoot) {
if (myInitialFSDelta == null) {
// this will force FS rescan
return null;
}
try {
final File file = new File(dataStorageRoot, FS_STATE_FILE);
final InputStream fs = new FileInputStream(file);
byte[] bytes;
try {
bytes = FileUtil.loadBytes(fs, (int) file.length());
} finally {
fs.close();
}
final DataInputStream in = new DataInputStream(new ByteArrayInputStream(bytes));
final int version = in.readInt();
if (version != FSState.VERSION) {
return null;
}
final long savedOrdinal = in.readLong();
if (savedOrdinal + 1L != myInitialFSDelta.getOrdinal()) {
return null;
}
return in;
} catch (FileNotFoundException ignored) {
} catch (Throwable e) {
LOG.error(e);
}
return null;
}
private void runBuild(final MessageHandler msgHandler, CanceledStatus cs) throws Throwable {
final File dataStorageRoot = Utils.getDataStorageRoot(myProjectPath);
if (dataStorageRoot == null) {
msgHandler.processMessage(
new CompilerMessage(
"build",
BuildMessage.Kind.ERROR,
"Cannot determine build data storage root for project " + myProjectPath));
return;
}
if (!dataStorageRoot.exists()) {
// invoked the very first time for this project. Force full rebuild
myBuildType = BuildType.PROJECT_REBUILD;
}
final DataInputStream fsStateStream = createFSDataStream(dataStorageRoot);
if (fsStateStream != null) {
// optimization: check whether we can skip the build
final boolean hasWorkToDoWithModules = fsStateStream.readBoolean();
if (myBuildType == BuildType.MAKE
&& !hasWorkToDoWithModules
&& scopeContainsModulesOnly(myBuildRunner.getScopes())
&& !containsChanges(myInitialFSDelta)) {
updateFsStateOnDisk(dataStorageRoot, fsStateStream, myInitialFSDelta.getOrdinal());
return;
}
}
final BuildFSState fsState = new BuildFSState(false);
try {
final ProjectDescriptor pd = myBuildRunner.load(msgHandler, dataStorageRoot, fsState);
myProjectDescriptor = pd;
if (fsStateStream != null) {
try {
try {
fsState.load(fsStateStream, pd.getModel(), pd.getBuildRootIndex());
applyFSEvent(pd, myInitialFSDelta);
} finally {
fsStateStream.close();
}
} catch (Throwable e) {
LOG.error(e);
fsState.clearAll();
}
}
myLastEventOrdinal = myInitialFSDelta != null ? myInitialFSDelta.getOrdinal() : 0L;
// free memory
myInitialFSDelta = null;
// ensure events from controller are processed after FSState initialization
myEventsProcessor.startProcessing();
myBuildRunner.runBuild(pd, cs, myConstantSearch, msgHandler, myBuildType);
} finally {
saveData(fsState, dataStorageRoot);
}
}
private void applyFSEvent(
ProjectDescriptor pd, @Nullable CmdlineRemoteProto.Message.ControllerMessage.FSEvent event)
throws IOException {
if (event == null) {
return;
}
final Timestamps timestamps = pd.timestamps.getStorage();
for (String deleted : event.getDeletedPathsList()) {
final File file = new File(deleted);
Collection<BuildRootDescriptor> descriptor =
pd.getBuildRootIndex().findAllParentDescriptors(file, null, null);
if (!descriptor.isEmpty()) {
if (Utils.IS_TEST_MODE) {
LOG.info("Applying deleted path from fs event: " + file.getPath());
}
for (BuildRootDescriptor rootDescriptor : descriptor) {
pd.fsState.registerDeleted(rootDescriptor.getTarget(), file, timestamps);
}
} else if (Utils.IS_TEST_MODE) {
LOG.info("Skipping deleted path: " + file.getPath());
}
}
for (String changed : event.getChangedPathsList()) {
final File file = new File(changed);
Collection<BuildRootDescriptor> descriptors =
pd.getBuildRootIndex().findAllParentDescriptors(file, null, null);
if (!descriptors.isEmpty()) {
if (Utils.IS_TEST_MODE) {
LOG.info("Applying dirty path from fs event: " + file.getPath());
}
for (BuildRootDescriptor descriptor : descriptors) {
pd.fsState.markDirty(null, file, descriptor, timestamps);
}
} else if (Utils.IS_TEST_MODE) {
LOG.info("Skipping dirty path: " + file.getPath());
}
}
}