package org.opensolaris.opengrok.index;

import java.io.File;

import java.io.IOException;

import java.lang.reflect.Field;

import java.net.InetAddress;

import java.text.ParseException;

import java.util.ArrayList;

import java.util.Collections;

import java.util.Comparator;

import java.util.HashMap;

import java.util.HashSet;

import java.util.List;

import java.util.Map;

import java.util.concurrent.ExecutorService;

import java.util.concurrent.Executors;

import java.util.concurrent.TimeUnit;

import java.util.logging.Level;

import java.util.logging.LogManager;

import java.util.logging.Logger;

import org.opensolaris.opengrok.Info;

import org.opensolaris.opengrok.OpenGrokLogger;

import org.opensolaris.opengrok.analysis.AnalyzerGuru;

import org.opensolaris.opengrok.configuration.Configuration;

import org.opensolaris.opengrok.configuration.Project;

import org.opensolaris.opengrok.configuration.RuntimeEnvironment;

import org.opensolaris.opengrok.history.HistoryException;

import org.opensolaris.opengrok.history.HistoryGuru;

import org.opensolaris.opengrok.history.Repository;

import org.opensolaris.opengrok.history.RepositoryFactory;

import org.opensolaris.opengrok.history.RepositoryInfo;

import org.opensolaris.opengrok.util.Getopt;

@SuppressWarnings({"PMD.AvoidPrintStackTrace", "PMD.SystemPrintln"})

public final class Indexer {

private final static String ON = "on";

private final static String OFF = "off";

private static Indexer index = new Indexer();

private static final Logger log = Logger.getLogger(Indexer.class.getName());

private static final String DERBY_EMBEDDED_DRIVER =

"org.apache.derby.jdbc.EmbeddedDriver";

private static final String DERBY_CLIENT_DRIVER =

"org.apache.derby.jdbc.ClientDriver";

public static Indexer getInstance() {

return index;

}

/**

@SuppressWarnings("PMD.UseStringBufferForStringAppends")

public static void main(String argv[]) {

boolean runIndex = true;

boolean update = true;

boolean optimizedChanged = false;

ArrayList<String> zapCache = new ArrayList<String>();

CommandLineOptions cmdOptions = new CommandLineOptions();

if (argv.length == 0) {

System.err.println(cmdOptions.getUsage());

System.exit(1);

} else {

boolean searchRepositories = false;

ArrayList<String> subFiles = new ArrayList<String>();

ArrayList<String> repositories = new ArrayList<String>();

HashSet<String> allowedSymlinks = new HashSet<String>();

String configFilename = null;

String configHost = null;

boolean addProjects = false;

boolean refreshHistory = false;

String defaultProject = null;

boolean listFiles = false;

boolean listRepos = false;

boolean createDict = false;

int noThreads = 2 + (2 * Runtime.getRuntime().availableProcessors());

// Parse command line options:

Getopt getopt = new Getopt(argv, cmdOptions.getCommandString());

try {

getopt.parse();

} catch (ParseException ex) {

System.err.println("OpenGrok: " + ex.getMessage());

System.err.println(cmdOptions.getUsage());

System.exit(1);

}

try {

Configuration cfg = null;

int cmd;

// We need to read the configuration file first, since we

// will try to overwrite options..

while ((cmd = getopt.getOpt()) != -1) {

if (cmd == 'R') {

cfg = Configuration.read(new File(getopt.getOptarg()));

break;

}

}

if (cfg == null) {

cfg = new Configuration();

}

String databaseDriver = cfg.getDatabaseDriver();

String databaseURL = cfg.getDatabaseUrl();

// Now we can handle all the other options..

getopt.reset();

while ((cmd = getopt.getOpt()) != -1) {

switch (cmd) {

case 'x':

createDict = true;

runIndex = false;

break;

case 'q':

cfg.setVerbose(false);

OpenGrokLogger.setOGConsoleLogLevel(Level.WARNING);

break;

case 'e':

cfg.setGenerateHtml(false);

break;

case 'P':

addProjects = true;

break;

case 'p':

defaultProject = getopt.getOptarg();

break;

case 'c':

cfg.setCtags(getopt.getOptarg());

break;

case 'w':

{

String webapp = getopt.getOptarg();

if (webapp.charAt(0) != '/' && !webapp.startsWith("http")) {

webapp = "/" + webapp;

}

if (webapp.endsWith("/")) {

cfg.setUrlPrefix(webapp + "s?");

} else {

cfg.setUrlPrefix(webapp + "/s?");

}

}

break;

case 'W':

configFilename = getopt.getOptarg();

break;

case 'U':

configHost = getopt.getOptarg();

break;

case 'R':

// already handled

break;

case 'N':

allowedSymlinks.add(getopt.getOptarg());

break;

case 'n':

runIndex = false;

break;

case 'H':

refreshHistory = true;

break;

case 'h':

repositories.add(getopt.getOptarg());

break;

case 'D':

cfg.setHistoryCacheInDB(true);

break;

case 'j':

databaseDriver = getopt.getOptarg();

// Should be a full class name, but we also accept

// the shorthands "client" and "embedded". Expand

// the shorthands here.

if ("client".equals(databaseDriver)) {

databaseDriver = DERBY_CLIENT_DRIVER;

} else if ("embedded".equals(databaseDriver)) {

databaseDriver = DERBY_EMBEDDED_DRIVER;

}

break;

case 'u':

databaseURL = getopt.getOptarg();

break;

case 'r':

{

if (getopt.getOptarg().equalsIgnoreCase(ON)) {

cfg.setRemoteScmSupported(true);

} else if (getopt.getOptarg().equalsIgnoreCase(OFF)) {

cfg.setRemoteScmSupported(false);

} else {

System.err.println("ERROR: You should pass either \"on\" or \"off\" as argument to -r");

System.err.println(" Ex: \"-r on\" will allow retrival for remote SCM systems");

System.err.println(" \"-r off\" will ignore SCM for remote systems");

}

}

break;

case 'O':

{

boolean oldval = cfg.isOptimizeDatabase();

if (getopt.getOptarg().equalsIgnoreCase(ON)) {

cfg.setOptimizeDatabase(true);

} else if (getopt.getOptarg().equalsIgnoreCase(OFF)) {

cfg.setOptimizeDatabase(false);

} else {

System.err.println("ERROR: You should pass either \"on\" or \"off\" as argument to -O");

System.err.println(" Ex: \"-O on\" will optimize the database as part of the index generation");

System.err.println(" \"-O off\" disable optimization of the index database");

}

if (oldval != cfg.isOptimizeDatabase()) {

optimizedChanged = true;

}

}

break;

case 'v':

cfg.setVerbose(true);

OpenGrokLogger.setOGConsoleLogLevel(Level.INFO);

break;

case 'C':

cfg.setPrintProgress(true);

break;

case 's':

{

File sourceRoot = new File(getopt.getOptarg());

if (!sourceRoot.isDirectory()) {

System.err.println("ERROR: Source root must be a directory");

System.exit(1);

}

cfg.setSourceRoot(sourceRoot.getCanonicalPath());

break;

}

case 'd':

{

File dataRoot = new File(getopt.getOptarg());

if (!dataRoot.exists() && !dataRoot.mkdirs()) {

System.err.println("ERROR: Cannot create data root");

System.exit(1);

}

if (!dataRoot.isDirectory()) {

System.err.println("ERROR: Data root must be a directory");

System.exit(1);

}

cfg.setDataRoot(dataRoot.getCanonicalPath());

break;

}

case 'i':

cfg.getIgnoredNames().add(getopt.getOptarg());

break;

case 'I':

cfg.getIncludedNames().add(getopt.getOptarg());

break;

case 'S':

searchRepositories = true;

break;

case 'Q':

if (getopt.getOptarg().equalsIgnoreCase(ON)) {

cfg.setQuickContextScan(true);

} else if (getopt.getOptarg().equalsIgnoreCase(OFF)) {

cfg.setQuickContextScan(false);

} else {

System.err.println("ERROR: You should pass either \"on\" or \"off\" as argument to -Q");

System.err.println(" Ex: \"-Q on\" will just scan a \"chunk\" of the file and insert \"[..all..]\"");

System.err.println(" \"-Q off\" will try to build a more accurate list by reading the complete file.");

}

break;

case 'm': {

try {

cfg.setIndexWordLimit(Integer.parseInt(getopt.getOptarg()));

} catch (NumberFormatException exp) {

System.err.println("ERROR: Failed to parse argument to \"-m\": " + exp.getMessage());

System.exit(1);

}

break;

}

case 'a':

if (getopt.getOptarg().equalsIgnoreCase(ON)) {

cfg.setAllowLeadingWildcard(true);

} else if (getopt.getOptarg().equalsIgnoreCase(OFF)) {

cfg.setAllowLeadingWildcard(false);

} else {

System.err.println("ERROR: You should pass either \"on\" or \"off\" as argument to -a");

System.err.println(" Ex: \"-a on\" will allow a search to start with a wildcard");

System.err.println(" \"-a off\" will disallow a search to start with a wildcard");

System.exit(1);

}

break;

case 'A':

{

String[] arg = getopt.getOptarg().split(":");

if (arg.length != 2) {

System.err.println("ERROR: You must specify: -A extension:class");

System.err.println(" Ex: -A foo:org.opensolaris.opengrok.analysis.c.CAnalyzer");

System.err.println(" will use the C analyzer for all files ending with .foo");

System.err.println(" Ex: -A c:-");

System.err.println(" will disable the c-analyzer for for all files ending with .c");

System.exit(1);

}

arg[0] = arg[0].substring(arg[0].lastIndexOf('.') + 1).toUpperCase();

if (arg[1].equals("-")) {

AnalyzerGuru.addExtension(arg[0], null);

break;

}

try {

AnalyzerGuru.addExtension(

arg[0],

AnalyzerGuru.findFactory(arg[1]));

} catch (Exception e) {

log.log(Level.SEVERE, "Unable to use {0} as a FileAnalyzerFactory", arg[1]);

log.log(Level.SEVERE, "Stack: ",e.fillInStackTrace());

System.exit(1);

}

}

break;

case 'L':

cfg.setWebappLAF(getopt.getOptarg());

break;

case 'T':

try {

noThreads = Integer.parseInt(getopt.getOptarg());

} catch (NumberFormatException exp) {

System.err.println("ERROR: Failed to parse argument to \"-T\": " + exp.getMessage());

System.exit(1);

}

break;

case 'z':

try {

cfg.setScanningDepth(Integer.parseInt(getopt.getOptarg()));

} catch (NumberFormatException exp) {

System.err.println("ERROR: Failed to parse argument to \"-z\": " + exp.getMessage());

System.exit(1);

}

break;

case 'l':

if (getopt.getOptarg().equalsIgnoreCase(ON)) {

cfg.setUsingLuceneLocking(true);

} else if (getopt.getOptarg().equalsIgnoreCase(OFF)) {

cfg.setUsingLuceneLocking(false);

} else {

System.err.println("ERROR: You should pass either \"on\" or \"off\" as argument to -l");

System.err.println(" Ex: \"-l on\" will enable locks in Lucene");

System.err.println(" \"-l off\" will disable locks in Lucene");

}

break;

case 'B':

cfg.setUserPage(getopt.getOptarg());

break;

case 'X':

cfg.setUserPageSuffix(getopt.getOptarg());

break;

case 'V':

System.out.println(Info.getFullVersion());

System.exit(0);

break;

case 'k':

zapCache.add(getopt.getOptarg());

break;

case 'K':

listRepos = true;

break;

case '?':

System.err.println(cmdOptions.getUsage());

System.exit(0);

break;

case 't':

try {

int tmp = Integer.parseInt(getopt.getOptarg());

cfg.setTabSize(tmp);

} catch (NumberFormatException exp) {

System.err.println("ERROR: Failed to parse argument to \"-t\": " + exp.getMessage());

System.exit(1);

}

break;

default:

System.err.println("Internal Error - Unimplemented cmdline option: " + (char) cmd);

System.exit(1);

}

}

List<Class<? extends Repository>> repositoryClasses =

RepositoryFactory.getRepositoryClasses();

for (Class<? extends Repository> clazz : repositoryClasses) {

try {

Field f = clazz.getDeclaredField("CMD_PROPERTY_KEY");

Object key = f.get(null);

if (key != null) {

cfg.setRepoCmd(clazz.getCanonicalName(),

System.getProperty(key.toString()));

}

} catch (Exception e) {

// don't care

}

}

int optind = getopt.getOptind();

if (optind != -1) {

while (optind < argv.length) {

subFiles.add(argv[optind]);

++optind;

}

}

//logging starts here

if (cfg.isVerbose()) {

String fn=LogManager.getLogManager().getProperty("java.util.logging.FileHandler.pattern");

if (fn!=null) {System.out.println("Logging filehandler pattern: "+fn);}

}

if (cfg.isHistoryCacheInDB()) {

// The default database driver is Derby's client driver.

if (databaseDriver == null) {

databaseDriver = DERBY_CLIENT_DRIVER;

}

// The default URL depends on the database driver.

if (databaseURL == null) {

StringBuilder defaultURL = new StringBuilder();

defaultURL.append("jdbc:derby:");

if (databaseDriver.equals(DERBY_EMBEDDED_DRIVER)) {

defaultURL.append(cfg.getDataRoot())

.append(File.separator);

} else {

defaultURL.append("//localhost/");

}

defaultURL.append("cachedb;create=true");

databaseURL = defaultURL.toString();

}

}

cfg.setDatabaseDriver(databaseDriver);

cfg.setDatabaseUrl(databaseURL);

// automatically allow symlinks that are directly in source root

String file = cfg.getSourceRoot();

if (file != null) {

File sourceRootFile = new File(file);

File[] projectDirs = sourceRootFile.listFiles();

if (projectDirs != null) {

for (File projectDir : projectDirs) {

if (!projectDir.getCanonicalPath().equals(projectDir.getAbsolutePath())) {

allowedSymlinks.add(projectDir.getAbsolutePath());

}

}

}

}

allowedSymlinks.addAll(cfg.getAllowedSymlinks());

cfg.setAllowedSymlinks(allowedSymlinks);

//Set updated configuration in RuntimeEnvironment

RuntimeEnvironment env = RuntimeEnvironment.getInstance();

env.setConfiguration(cfg);

getInstance().prepareIndexer(env, searchRepositories, addProjects,

defaultProject, configFilename, refreshHistory,

listFiles, createDict, subFiles, repositories,

zapCache, listRepos);

if (listRepos || !zapCache.isEmpty()) {

return;

}

if (runIndex || (optimizedChanged && env.isOptimizeDatabase())) {

IndexChangedListener progress = new DefaultIndexChangedListener();

getInstance().doIndexerExecution(update, noThreads, subFiles,

progress);

}

getInstance().sendToConfigHost(env, configHost);

} catch (IndexerException ex) {

OpenGrokLogger.getLogger().log(Level.SEVERE, "Exception running indexer", ex);

System.err.println(cmdOptions.getUsage());

System.exit(1);

} catch (IOException ioe) {

System.err.println("Got IOException " + ioe);

OpenGrokLogger.getLogger().log(Level.SEVERE, "Exception running indexer", ioe);

System.exit(1);

}

}

}

// PMD wants us to use length() > 0 && charAt(0) instead of startsWith()

// for performance. We prefer clarity over performance here, so silence it.

@SuppressWarnings("PMD.SimplifyStartsWith")

public void prepareIndexer(RuntimeEnvironment env,

boolean searchRepositories,

boolean addProjects,

String defaultProject,

String configFilename,

boolean refreshHistory,

boolean listFiles,

boolean createDict,

List<String> subFiles,

List<String> repositories,

List<String> zapCache,

boolean listRepoPathes) throws IndexerException, IOException {

if (env.getDataRootPath() == null) {

throw new IndexerException("ERROR: Please specify a DATA ROOT path");

}

if (env.getSourceRootFile() == null) {

throw new IndexerException("ERROR: please specify a SRC_ROOT with option -s !");

}

if (!env.validateExuberantCtags()) {

throw new IndexerException("Didn't find Exuberant Ctags");

}

if (zapCache == null) {

throw new IndexerException("Internal error, zapCache shouldn't be null");

}

if (searchRepositories || listRepoPathes || !zapCache.isEmpty()) {

log.log(Level.INFO,"Scanning for repositories...");

long start = System.currentTimeMillis();

HistoryGuru.getInstance().addRepositories(env.getSourceRootPath());

long time = (System.currentTimeMillis() - start) / 1000;

log.log(Level.INFO, "Done scanning for repositories ({0}s)", time);

if (listRepoPathes || !zapCache.isEmpty()) {

List<RepositoryInfo> repos = env.getRepositories();

String prefix = env.getSourceRootPath();

if (listRepoPathes) {

if (repos.isEmpty()) {

System.out.println("No repositories found.");

return;

}

System.out.println("Repositories in " + prefix + ":");

for (RepositoryInfo info : env.getRepositories()) {

String dir = info.getDirectoryName();

System.out.println(dir.substring(prefix.length()));

}

}

if (!zapCache.isEmpty()) {

HashSet<String> toZap = new HashSet<String>(zapCache.size() << 1);

boolean all = false;

for (String repo : zapCache) {

if ("*".equals(repo)) {

all = true;

break;

}

if (repo.startsWith(prefix)) {

repo = repo.substring(prefix.length());

}

toZap.add(repo);

}

if (all) {

toZap.clear();

for (RepositoryInfo info : env.getRepositories()) {

toZap.add(info.getDirectoryName()

.substring(prefix.length()));

}

}

try {

HistoryGuru.getInstance().removeCache(toZap);

} catch (HistoryException e) {

log.warning("Clearing history cache faild: "

+ e.getLocalizedMessage());

}

}

return;

}

}

if (addProjects) {

File files[] = env.getSourceRootFile().listFiles();

List<Project> projects = env.getProjects();

// Keep a copy of the old project list so that we can preserve

// the customization of existing projects.

Map<String, Project> oldProjects = new HashMap<String, Project>();

for (Project p : projects) {

oldProjects.put(p.getPath(), p);

}

projects.clear();

// Add a project for each top-level directory in source root.

for (File file : files) {

String name = file.getName();

String path = "/" + name;

if (oldProjects.containsKey(path)) {

// This is an existing object. Reuse the old project,

// possibly with customizations, instead of creating a

// new with default values.

projects.add(oldProjects.get(path));

} else if (!name.startsWith(".") && file.isDirectory()) {

// Found a new directory with no matching project, so

// create a new project with default properties.

Project p = new Project();

p.setDescription(name);

p.setPath(path);

p.setTabSize(env.getConfiguration().getTabSize());

projects.add(p);

}

}

// The projects should be sorted...

Collections.sort(projects, new Comparator<Project>() {

@Override

public int compare(Project p1, Project p2) {

String s1 = p1.getDescription();

String s2 = p2.getDescription();

int ret;

if (s1 == null) {

ret = (s2 == null) ? 0 : 1;

} else {

ret = s1.compareTo(s2);

}

return ret;

}

});

}

if (defaultProject != null) {

for (Project p : env.getProjects()) {

if (p.getPath().equals(defaultProject)) {

env.setDefaultProject(p);

break;

}

}

}

if (configFilename != null) {

log.log(Level.INFO, "Writing configuration to {0}", configFilename);

env.writeConfiguration(new File(configFilename));

log.info("Done...");

}

if (refreshHistory) {

log.log(Level.INFO, "Generating history cache for all repositories ...");

HistoryGuru.getInstance().createCache();

log.info("Done...");

} else if (repositories != null && !repositories.isEmpty()) {

log.log(Level.INFO, "Generating history cache for specified repositories ...");

HistoryGuru.getInstance().createCache(repositories);

log.info("Done...");

}

if (listFiles) {

IndexDatabase.listAllFiles(subFiles);

}

if (createDict) {

IndexDatabase.listFrequentTokens(subFiles);

}

}

public void doIndexerExecution(final boolean update, int noThreads, List<String> subFiles,

IndexChangedListener progress)

throws IOException {

RuntimeEnvironment env = RuntimeEnvironment.getInstance().register();

log.info("Starting indexing");

ExecutorService executor = Executors.newFixedThreadPool(noThreads);

if (subFiles == null || subFiles.isEmpty()) {

if (update) {

IndexDatabase.updateAll(executor, progress);

} else if (env.isOptimizeDatabase()) {

IndexDatabase.optimizeAll(executor);

}

} else {

List<IndexDatabase> dbs = new ArrayList<IndexDatabase>();

for (String path : subFiles) {

Project project = Project.getProject(path);

if (project == null && env.hasProjects()) {

log.log(Level.WARNING, "Could not find a project for \"{0}\"", path);

} else {

IndexDatabase db;

if (project == null) {

db = new IndexDatabase();

} else {

db = new IndexDatabase(project);

}

int idx = dbs.indexOf(db);

if (idx != -1) {

db = dbs.get(idx);

}

if (db.addDirectory(path)) {

if (idx == -1) {

dbs.add(db);

}

} else {

log.log(Level.WARNING, "Directory does not exist \"{0}\"", path);

}

}

}

for (final IndexDatabase db : dbs) {

final boolean optimize = env.isOptimizeDatabase();

db.addIndexChangedListener(progress);

executor.submit(new Runnable() {

@Override

public void run() {

try {

if (update) {

db.update();

} else if (optimize) {

db.optimize();

}

} catch (Exception e) {

if (update) {

OpenGrokLogger.getLogger().log(Level.WARNING, "An error occured while updating index", e);

} else {

OpenGrokLogger.getLogger().log(Level.WARNING, "An error occured while optimizing index", e);

}

log.log(Level.SEVERE,"Stack trace: ",e.fillInStackTrace());

}

}

});

}

}

executor.shutdown();

while (!executor.isTerminated()) {

try {

// Wait forever

executor.awaitTermination(999,TimeUnit.DAYS);

} catch (InterruptedException exp) {

OpenGrokLogger.getLogger().log(Level.WARNING, "Received interrupt while waiting for executor to finish", exp);

}

}

}

public void sendToConfigHost(RuntimeEnvironment env, String configHost) {

if (configHost != null) {

String[] cfg = configHost.split(":");

log.log(Level.INFO, "Send configuration to: {0}", configHost);

if (cfg.length == 2) {

try {

InetAddress host = InetAddress.getByName(cfg[0]);

RuntimeEnvironment.getInstance().writeConfiguration(host, Integer.parseInt(cfg[1]));

} catch (Exception ex) {

log.log(Level.SEVERE, "Failed to send configuration to " + configHost+" (is web application server running with opengrok deployed?)", ex);

}

} else {

log.severe("Syntax error: ");

for (String s : cfg) {

log.log(Level.SEVERE, "[{0}]", s);

}

}

log.info("Configuration update routine done, check log output for errors.");

}

}

private Indexer() {

}

}