#ifndef lint
static char rcsid[] = "@(#$Id: indexer.cpp,v 1.24 2006-01-26 07:02:06 dockes Exp $ (C) 2004 J.F.Dockes";
#endif
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the
* Free Software Foundation, Inc.,
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <stdio.h>
#include <sys/stat.h>
#include <unistd.h>
#include <errno.h>
#include <strings.h>
#include <iostream>
#include <list>
#include <map>
#include <algorithm>
#include "pathut.h"
#include "conftree.h"
#include "rclconfig.h"
#include "fstreewalk.h"
#include "rcldb.h"
#include "readfile.h"
#include "indexer.h"
#include "csguess.h"
#include "transcode.h"
#include "debuglog.h"
#include "internfile.h"
#include "smallut.h"
#include "wipedir.h"
#ifndef NO_NAMESPACES
using namespace std;
#endif /* NO_NAMESPACES */
#ifndef deleteZ
#define deleteZ(X) {delete X;X = 0;}
#endif
DbIndexer::~DbIndexer() {
// Maybe clean up temporary directory
if (tmpdir.length()) {
wipedir(tmpdir);
if (rmdir(tmpdir.c_str()) < 0) {
LOGERR(("DbIndexer::~DbIndexer: cannot clear temp dir %s\n",
tmpdir.c_str()));
}
}
db.close();
}
// Index each directory in the topdirs for a given db
bool DbIndexer::indexDb(bool resetbefore, list<string> *topdirs)
{
if (!init(resetbefore))
return false;
for (list<string>::const_iterator it = topdirs->begin();
it != topdirs->end(); it++) {
LOGDEB(("DbIndexer::index: Indexing %s into %s\n", it->c_str(),
dbdir.c_str()));
// Set the current directory in config so that subsequent
// getConfParams() will get local values
config->setKeyDir(*it);
// Set up skipped patterns for this subtree. This probably should be
// done in the directory change code in processone() instead.
walker.clearSkippedNames();
string skipped;
if (config->getConfParam("skippedNames", skipped)) {
list<string> skpl;
stringToStrings(skipped, skpl);
walker.setSkippedNames(skpl);
}
// Walk the directory tree
if (walker.walk(*it, *this) != FsTreeWalker::FtwOk) {
LOGERR(("DbIndexer::index: error while indexing %s\n",
it->c_str()));
return false;
}
}
// Get rid of all database entries that don't exist in the
// filesystem anymore.
db.purge();
// Create stemming databases. We also remove those which are not
// configured.
string slangs;
if (config->getConfParam("indexstemminglanguages", slangs)) {
list<string> langs;
stringToStrings(slangs, langs);
// Get the list of existing stem dbs from the database (some may have
// been manually created, we just keep those from the config
list<string> dblangs = db.getStemLangs();
list<string>::const_iterator it;
for (it = dblangs.begin(); it != dblangs.end(); it++) {
if (find(langs.begin(), langs.end(), *it) == langs.end())
db.deleteStemDb(*it);
}
for (it = langs.begin(); it != langs.end(); it++) {
db.createStemDb(*it);
}
}
// The close would be done in our destructor, but we want status here
if (!db.close()) {
LOGERR(("DbIndexer::index: error closing database in %s\n",
dbdir.c_str()));
return false;
}
return true;
}
bool DbIndexer::init(bool resetbefore)
{
if (!maketmpdir(tmpdir)) {
LOGERR(("DbIndexer: cannot create temporary directory\n"));
return false;
}
if (!db.open(dbdir, resetbefore ? Rcl::Db::DbTrunc : Rcl::Db::DbUpd)) {
LOGERR(("DbIndexer: error opening database in %s\n", dbdir.c_str()));
return false;
}
return true;
}
bool DbIndexer::createStemDb(const string &lang)
{
if (!init())
return false;
return db.createStemDb(lang);
}
/**
Index individual files, out of a full tree run. No database purging
*/
bool DbIndexer::indexFiles(const list<string> &filenames)
{
if (!init())
return false;
list<string>::const_iterator it;
for (it = filenames.begin(); it != filenames.end();it++) {
config->setKeyDir(path_getfather(*it));
struct stat stb;
if (stat(it->c_str(), &stb) != 0) {
LOGERR(("DbIndexer::indexFiles: stat(%s): %s", it->c_str(),
strerror(errno)));
continue;
}
if (!S_ISREG(stb.st_mode)) {
LOGERR(("DbIndexer::indexFiles: %s: not a regular file\n",
it->c_str()));
continue;
}
if (processone(*it, &stb, FsTreeWalker::FtwRegular) !=
FsTreeWalker::FtwOk) {
LOGERR(("DbIndexer::indexFiles: Database error\n"));
return false;
}
}
// The close would be done in our destructor, but we want status here
if (!db.close()) {
LOGERR(("DbIndexer::indexfiles: error closing database in %s\n",
dbdir.c_str()));
return false;
}
return true;
}
/// This method gets called for every file and directory found by the
/// tree walker.
///
/// It checks with the db if the file has changed and needs to be
/// reindexed. If so, it calls internfile() which will identify the
/// file type and call an appropriate handler to convert the document into
/// internal format, which we then add to the database.
///
/// Accent and majuscule handling are performed by the db module when doing
/// the actual indexing work. The Rcl::Doc created by internfile()
/// contains pretty raw utf8 data.
FsTreeWalker::Status
DbIndexer::processone(const std::string &fn, const struct stat *stp,
FsTreeWalker::CbFlag flg)
{
// If we're changing directories, possibly adjust parameters (set
// the current directory in configuration object)
if (flg == FsTreeWalker::FtwDirEnter ||
flg == FsTreeWalker::FtwDirReturn) {
config->setKeyDir(fn);
return FsTreeWalker::FtwOk;
}
// Check db up to date ? Doing this before file type
// identification means that, if usesystemfilecommand is switched
// from on to off it may happen that some files which are now
// without mime type will not be purged from the db, resulting
// into possible 'cannot intern file' messages at query time...
if (!db.needUpdate(fn, stp)) {
LOGDEB(("indexfile: up to date: %s\n", fn.c_str()));
return FsTreeWalker::FtwOk;
}
FileInterner interner(fn, config, tmpdir);
FileInterner::Status fis = FileInterner::FIAgain;
while (fis == FileInterner::FIAgain) {
Rcl::Doc doc;
string ipath;
fis = interner.internfile(doc, ipath);
if (fis == FileInterner::FIError)
break;
// Set the date if this was not done in the document handler
if (doc.fmtime.empty()) {
char ascdate[20];
sprintf(ascdate, "%ld", long(stp->st_ctime));
doc.fmtime = ascdate;
}
// Internal access path for multi-document files
doc.ipath = ipath;
// Do database-specific work to update document data
if (!db.add(fn, doc, stp))
return FsTreeWalker::FtwError;
}
return FsTreeWalker::FtwOk;
}
////////////////////////////////////////////////////////////////////////////
// ConIndexer methods: ConfIndexer is the top-level object, that can index
// multiple directories to multiple databases.
ConfIndexer::~ConfIndexer()
{
deleteZ(dbindexer);
}
bool ConfIndexer::index(bool resetbefore)
{
// Retrieve the list of directories to be indexed.
string topdirs;
if (!config->getConfParam("topdirs", topdirs)) {
LOGERR(("ConfIndexer::index: no top directories in configuration\n"));
return false;
}
list<string> tdl; // List of directories to be indexed
if (!stringToStrings(topdirs, tdl)) {
LOGERR(("ConfIndexer::index: parse error for directory list\n"));
return false;
}
// Each top level directory to be indexed can be associated with a
// different database. We first group the directories by database:
// it is important that all directories for a database be indexed
// at once so that deleted file cleanup works
list<string>::iterator dirit;
map<string, list<string> > dbmap;
map<string, list<string> >::iterator dbit;
for (dirit = tdl.begin(); dirit != tdl.end(); dirit++) {
string dbdir;
string doctopdir = path_tildexpand(*dirit);
config->setKeyDir(doctopdir);
if (!config->getConfParam("dbdir", dbdir)) {
LOGERR(("ConfIndexer::index: no database directory in "
"configuration for %s\n", doctopdir.c_str()));
return false;
}
dbdir = path_tildexpand(dbdir);
dbit = dbmap.find(dbdir);
if (dbit == dbmap.end()) {
list<string> l;
l.push_back(doctopdir);
dbmap[dbdir] = l;
} else {
dbit->second.push_back(doctopdir);
}
}
config->setKeyDir("");
// The dbmap now has dbdir as key and directory lists as values.
// Index each directory group in turn
for (dbit = dbmap.begin(); dbit != dbmap.end(); dbit++) {
//cout << dbit->first << " -> ";
//list<string>::const_iterator dit;
//for (dit = dbit->second.begin(); dit != dbit->second.end(); dit++) {
// cout << *dit << " ";
//}
//cout << endl;
dbindexer = new DbIndexer(config, dbit->first);
if (!dbindexer->indexDb(resetbefore, &dbit->second)) {
deleteZ(dbindexer);
return false;
}
deleteZ(dbindexer);
}
return true;
}