]> git.openstreetmap.org Git - nominatim.git/blobdiff - utils/update.php
update drop list for new postcode table
[nominatim.git] / utils / update.php
index 7fc864c57f655e09c0539e20bb7d3a80a307d56b..2fc3dba2acfc82285498d89a0e53597afd149c31 100755 (executable)
 #!/usr/bin/php -Cq
 <?php
 
-        require_once(dirname(dirname(__FILE__)).'/lib/init-cmd.php');
-        ini_set('memory_limit', '800M');
-
-       $aCMDOptions = array(
-               "Import / update / index osm data",
-               array('help', 'h', 0, 1, 0, 0, false, 'Show Help'),
-               array('quiet', 'q', 0, 1, 0, 0, 'bool', 'Quiet output'),
-               array('verbose', 'v', 0, 1, 0, 0, 'bool', 'Verbose output'),
-
-               array('max-load', '', 0, 1, 1, 1, 'float', 'Maximum load average - indexing is paused if this is exceeded'),
-               array('max-blocking', '', 0, 1, 1, 1, 'int', 'Maximum blocking processes - indexing is aborted / paused if this is exceeded'),
-
-               array('import-osmosis', '', 0, 1, 0, 0, 'bool', 'Import using osmosis'),
-               array('import-osmosis-all', '', 0, 1, 0, 0, 'bool', 'Import using osmosis forever'),
-
-               array('import-npi-all', '', 0, 1, 0, 0, 'bool', 'Import npi pre-indexed files'),
-
-               array('import-hourly', '', 0, 1, 0, 0, 'bool', 'Import hourly diffs'),
-               array('import-daily', '', 0, 1, 0, 0, 'bool', 'Import daily diffs'),
-               array('import-all', '', 0, 1, 0, 0, 'bool', 'Import all available files'),
-
-               array('import-file', '', 0, 1, 1, 1, 'realpath', 'Re-import data from an OSM file'),
-               array('import-diff', '', 0, 1, 1, 1, 'realpath', 'Import a diff (osc) file from local file system'),
-
-               array('import-node', '', 0, 1, 1, 1, 'int', 'Re-import node'),
-               array('import-way', '', 0, 1, 1, 1, 'int', 'Re-import way'),
-               array('import-relation', '', 0, 1, 1, 1, 'int', 'Re-import relation'),
-
-               array('index', '', 0, 1, 0, 0, 'bool', 'Index'),
-               array('index-rank', '', 0, 1, 1, 1, 'int', 'Rank to start indexing from'),
-               array('index-instances', '', 0, 1, 1, 1, 'int', 'Number of indexing instances (threads)'),
-               array('index-estrate', '', 0, 1, 1, 1, 'int', 'Estimated indexed items per second (def:30)'),
-
-               array('deduplicate', '', 0, 1, 0, 0, 'bool', 'Deduplicate tokens'),
-       );
-       getCmdOpt($_SERVER['argv'], $aCMDOptions, $aResult, true, true);
-
-       if ($aResult['import-hourly'] + $aResult['import-daily'] + isset($aResult['import-diff']) > 1)
-       {
-               showUsage($aCMDOptions, true, 'Select either import of hourly or daily');
-       }
-
-       if (!isset($aResult['index-instances'])) $aResult['index-instances'] = 1;
-/*
-       // Lock to prevent multiple copies running
-       if (exec('/bin/ps uww | grep '.basename(__FILE__).' | grep -v /dev/null | grep -v grep -c', $aOutput2, $iResult) > 1)
-       {
-               echo "Copy already running\n";
-               exit;
-       }
-       if (!isset($aResult['max-load'])) $aResult['max-load'] = 1.9;
-       if (!isset($aResult['max-blocking'])) $aResult['max-blocking'] = 3;
-       if (getBlockingProcesses() > $aResult['max-blocking'])
-       {
-               echo "Too many blocking processes for import\n";
-               exit;
-       }
-*/
-
-       // Assume osm2pgsql is in the folder above
-       $sBasePath = dirname(dirname(__FILE__));
-
-       $oDB =& getDB();
-
-       $bFirst = true;
-       $bContinue = $aResult['import-all'];
-       while ($bContinue || $bFirst)
-       {
-               $bFirst = false;
-
-               if ($aResult['import-hourly'])
-               {
-                       // Mirror the hourly diffs
-                       exec('wget --quiet --mirror -l 1 -P '.$sMirrorDir.' http://planet.openstreetmap.org/hourly');
-                       $sNextFile = $oDB->getOne('select TO_CHAR(lastimportdate,\'YYYYMMDDHH24\')||\'-\'||TO_CHAR(lastimportdate+\'1 hour\'::interval,\'YYYYMMDDHH24\')||\'.osc.gz\' from import_status');
-                       $sNextFile = $sMirrorDir.'planet.openstreetmap.org/hourly/'.$sNextFile;
-                       $sUpdateSQL = 'update import_status set lastimportdate = lastimportdate+\'1 hour\'::interval';
-               }
-
-               if ($aResult['import-daily'])
-               {
-                       // Mirror the daily diffs
-                       exec('wget --quiet --mirror -l 1 -P '.$sMirrorDir.' http://planet.openstreetmap.org/daily');
-                       $sNextFile = $oDB->getOne('select TO_CHAR(lastimportdate,\'YYYYMMDD\')||\'-\'||TO_CHAR(lastimportdate+\'1 day\'::interval,\'YYYYMMDD\')||\'.osc.gz\' from import_status');
-                       $sNextFile = $sMirrorDir.'planet.openstreetmap.org/daily/'.$sNextFile;
-                       $sUpdateSQL = 'update import_status set lastimportdate = lastimportdate::date + 1';
-               }
-               
-               if (isset($aResult['import-diff']))
-               {
-                       // import diff directly (e.g. from osmosis --rri)
-                       $sNextFile = $aResult['import-diff'];
-                       if (!file_exists($nextFile))
-                       {
-                               echo "Cannot open $nextFile\n";
-                               exit;
-                       }
-                       // Don't update the import status - we don't know what this file contains
-                       $sUpdateSQL = 'update import_status set lastimportdate = now() where false';
-               }
-
-               // Missing file is not an error - it might not be created yet
-               if (($aResult['import-hourly'] || $aResult['import-daily']) && file_exists($sNextFile))
-               {
-                       // Import the file
-                       $sCMD = $sBasePath.'/osm2pgsql/osm2pgsql -klas -C 2000 -O gazetteer -d '.$sDatabaseName.' '.$sNextFile;
-                       echo $sCMD."\n";
-                       exec($sCMD, $sJunk, $iErrorLevel);
-
-                       if ($iErrorLevel)
-                       {
-                               echo "Error from osm2pgsql, $iErrorLevel\n";
-                               exit;
-                       }
-       
-                       // Move the date onwards
-                       $oDB->query($sUpdateSQL);
-               }
-               else
-               {
-                       $bContinue = false;
-               }
-       }
-
-       $sModifyXML = false;
-       if (isset($aResult['import-file']) && $aResult['import-file'])
-       {
-               $sModifyXML = file_get_contents($aResult['import-file']);
-       }
-       if (isset($aResult['import-node']) && $aResult['import-node'])
-       {
-               $sModifyXML = file_get_contents('http://www.openstreetmap.org/api/0.6/node/'.$aResult['import-node']);
-       }
-       if (isset($aResult['import-way']) && $aResult['import-way'])
-       {
-               $sModifyXML = file_get_contents('http://www.openstreetmap.org/api/0.6/way/'.$aResult['import-way'].'/full');
-       }
-       if (isset($aResult['import-relation']) && $aResult['import-relation'])
-       {
-               $sModifyXML = file_get_contents('http://www.openstreetmap.org/api/0.6/relation/'.$aResult['import-relation'].'/full');
-       }
-       if ($sModifyXML)
-       {
-               // Hack into a modify request
-               $sModifyXML = str_replace('<osm version="0.6" generator="OpenStreetMap server">',
-                       '<osmChange version="0.6" generator="OpenStreetMap server"><modify>', $sModifyXML);
-               $sModifyXML = str_replace('</osm>', '</modify></osmChange>', $sModifyXML);
-
-               // Outputing this is too verbose
-               if ($aResult['verbose'] && false) var_dump($sModifyXML);
-
-               $sDatabaseName = 'nominatim';
-               $aSpec = array(
-                       0 => array("pipe", "r"),  // stdin
-                       1 => array("pipe", "w"),  // stdout
-                       2 => array("pipe", "w") // stderr
-               );
-               $aPipes = array();
-               $sCMD = $sBasePath.'/osm2pgsql/osm2pgsql -klas -C 2000 -O gazetteer -d '.$sDatabaseName.' -';
-               echo $sCMD."\n";
-               $hProc = proc_open($sCMD, $aSpec, $aPipes);
-               if (!is_resource($hProc))
-               {
-                       echo "$sBasePath/osm2pgsql failed\n";
-                       exit;   
-               }
-               fwrite($aPipes[0], $sModifyXML);
-               fclose($aPipes[0]);
-               $sOut = stream_get_contents($aPipes[1]);
-               if ($aResult['verbose']) echo $sOut;
-               fclose($aPipes[1]);
-               $sErrors = stream_get_contents($aPipes[2]);
-               if ($aResult['verbose']) echo $sErrors;
-               fclose($aPipes[2]);
-               if ($iError = proc_close($hProc))
-               {
-                       echo "osm2pgsql existed with error level $iError\n";
-                       echo $sOut;
-                       echo $sErrors;
-                       exit;
-               }
-       }
-
-       if ($aResult['deduplicate'])
-       {
-                $oDB =& getDB();
-                $sSQL = 'select partition from country_name order by country_code';
-                $aPartitions = $oDB->getCol($sSQL);
-                if (PEAR::isError($aPartitions))
-                {
-                        fail($aPartitions->getMessage());
+require_once(dirname(dirname(__FILE__)).'/settings/settings.php');
+require_once(CONST_BasePath.'/lib/init-cmd.php');
+ini_set('memory_limit', '800M');
+
+$aCMDOptions
+= array(
+   'Import / update / index osm data',
+   array('help', 'h', 0, 1, 0, 0, false, 'Show Help'),
+   array('quiet', 'q', 0, 1, 0, 0, 'bool', 'Quiet output'),
+   array('verbose', 'v', 0, 1, 0, 0, 'bool', 'Verbose output'),
+
+   array('init-updates', '', 0, 1, 0, 0, 'bool', 'Set up database for updating'),
+   array('import-osmosis', '', 0, 1, 0, 0, 'bool', 'Import updates once'),
+   array('import-osmosis-all', '', 0, 1, 0, 0, 'bool', 'Import updates forever'),
+   array('no-index', '', 0, 1, 0, 0, 'bool', 'Do not index the new data'),
+
+   array('calculate-postcodes', '', 0, 1, 0, 0, 'bool', 'Update postcode centroid table'),
+
+   array('import-file', '', 0, 1, 1, 1, 'realpath', 'Re-import data from an OSM file'),
+   array('import-diff', '', 0, 1, 1, 1, 'realpath', 'Import a diff (osc) file from local file system'),
+   array('osm2pgsql-cache', '', 0, 1, 1, 1, 'int', 'Cache size used by osm2pgsql'),
+
+   array('import-node', '', 0, 1, 1, 1, 'int', 'Re-import node'),
+   array('import-way', '', 0, 1, 1, 1, 'int', 'Re-import way'),
+   array('import-relation', '', 0, 1, 1, 1, 'int', 'Re-import relation'),
+   array('import-from-main-api', '', 0, 1, 0, 0, 'bool', 'Use OSM API instead of Overpass to download objects'),
+
+   array('index', '', 0, 1, 0, 0, 'bool', 'Index'),
+   array('index-rank', '', 0, 1, 1, 1, 'int', 'Rank to start indexing from'),
+   array('index-instances', '', 0, 1, 1, 1, 'int', 'Number of indexing instances (threads)'),
+
+   array('deduplicate', '', 0, 1, 0, 0, 'bool', 'Deduplicate tokens'),
+   array('recompute-word-counts', '', 0, 1, 0, 0, 'bool', 'Compute frequency of full-word search terms'),
+   array('no-npi', '', 0, 1, 0, 0, 'bool', '(obsolete)'),
+  );
+getCmdOpt($_SERVER['argv'], $aCMDOptions, $aResult, true, true);
+
+if (!isset($aResult['index-instances'])) $aResult['index-instances'] = 1;
+if (!isset($aResult['index-rank'])) $aResult['index-rank'] = 0;
+
+date_default_timezone_set('Etc/UTC');
+
+$oDB =& getDB();
+
+$aDSNInfo = DB::parseDSN(CONST_Database_DSN);
+if (!isset($aDSNInfo['port']) || !$aDSNInfo['port']) $aDSNInfo['port'] = 5432;
+
+// cache memory to be used by osm2pgsql, should not be more than the available memory
+$iCacheMemory = (isset($aResult['osm2pgsql-cache'])?$aResult['osm2pgsql-cache']:2000);
+if ($iCacheMemory + 500 > getTotalMemoryMB()) {
+    $iCacheMemory = getCacheMemoryMB();
+    echo "WARNING: resetting cache memory to $iCacheMemory\n";
+}
+$sOsm2pgsqlCmd = CONST_Osm2pgsql_Binary.' -klas --number-processes 1 -C '.$iCacheMemory.' -O gazetteer -d '.$aDSNInfo['database'].' -P '.$aDSNInfo['port'];
+if (!is_null(CONST_Osm2pgsql_Flatnode_File)) {
+    $sOsm2pgsqlCmd .= ' --flat-nodes '.CONST_Osm2pgsql_Flatnode_File;
+}
+
+if ($aResult['init-updates']) {
+    // sanity check that the replication URL is correct
+    $sBaseState = file_get_contents(CONST_Replication_Url.'/state.txt');
+    if ($sBaseState === false) {
+        echo "\nCannot find state.txt file at the configured replication URL.\n";
+        echo "Does the URL point to a directory containing OSM update data?\n\n";
+        fail('replication URL not reachable.');
+    }
+    $sSetup = CONST_InstallPath.'/utils/setup.php';
+    $iRet = -1;
+    passthru($sSetup.' --create-functions --enable-diff-updates', $iRet);
+    if ($iRet != 0) {
+        fail('Error running setup script');
+    }
+
+    $sDatabaseDate = getDatabaseDate($oDB);
+    if ($sDatabaseDate === false) {
+        fail('Cannot determine date of database.');
+    }
+    $sWindBack = strftime('%Y-%m-%dT%H:%M:%SZ', strtotime($sDatabaseDate) - (3*60*60));
+
+    // get the appropriate state id
+    $aOutput = 0;
+    $sCmd = CONST_Pyosmium_Binary.' -D '.$sWindBack.' --server '.CONST_Replication_Url;
+    exec($sCmd, $aOutput, $iRet);
+    if ($iRet != 0 || $aOutput[0] == 'None') {
+        fail('Error running pyosmium tools');
+    }
+
+    pg_query($oDB->connection, 'TRUNCATE import_status');
+    $sSQL = "INSERT INTO import_status (lastimportdate, sequence_id, indexed) VALUES('";
+    $sSQL .= $sDatabaseDate."',".$aOutput[0].', true)';
+    if (!pg_query($oDB->connection, $sSQL)) {
+        fail('Could not enter sequence into database.');
+    }
+
+    echo "Done. Database updates will start at sequence $aOutput[0] ($sWindBack)\n";
+}
+
+if (isset($aResult['import-diff']) || isset($aResult['import-file'])) {
+    // import diffs and files directly (e.g. from osmosis --rri)
+    $sNextFile = isset($aResult['import-diff']) ? $aResult['import-diff'] : $aResult['import-file'];
+
+    if (!file_exists($sNextFile)) {
+        fail("Cannot open $sNextFile\n");
+    }
+
+    // Import the file
+    $sCMD = $sOsm2pgsqlCmd.' '.$sNextFile;
+    echo $sCMD."\n";
+    exec($sCMD, $sJunk, $iErrorLevel);
+
+    if ($iErrorLevel) {
+        fail("Error from osm2pgsql, $iErrorLevel\n");
+    }
+
+    // Don't update the import status - we don't know what this file contains
+}
+
+if ($aResult['calculate-postcodes']) {
+    info('Update postcodes centroids');
+    $sTemplate = file_get_contents(CONST_BasePath.'/sql/update-postcodes.sql');
+    runSQLScript($sTemplate, true, true);
+}
+
+$sTemporaryFile = CONST_BasePath.'/data/osmosischange.osc';
+$bHaveDiff = false;
+$bUseOSMApi = isset($aResult['import-from-main-api']) && $aResult['import-from-main-api'];
+$sContentURL = '';
+if (isset($aResult['import-node']) && $aResult['import-node']) {
+    if ($bUseOSMApi) {
+        $sContentURL = 'https://www.openstreetmap.org/api/0.6/node/'.$aResult['import-node'];
+    } else {
+        $sContentURL = 'https://overpass-api.de/api/interpreter?data=node('.$aResult['import-node'].');out%20meta;';
+    }
+}
+
+if (isset($aResult['import-way']) && $aResult['import-way']) {
+    if ($bUseOSMApi) {
+        $sContentURL = 'https://www.openstreetmap.org/api/0.6/way/'.$aResult['import-way'].'/full';
+    } else {
+        $sContentURL = 'https://overpass-api.de/api/interpreter?data=(way('.$aResult['import-way'].');node(w););out%20meta;';
+    }
+}
+
+if (isset($aResult['import-relation']) && $aResult['import-relation']) {
+    if ($bUseOSMApi) {
+        $sContentURLsModifyXMLstr = 'https://www.openstreetmap.org/api/0.6/relation/'.$aResult['import-relation'].'/full';
+    } else {
+        $sContentURL = 'https://overpass-api.de/api/interpreter?data=((rel('.$aResult['import-relation'].');way(r);node(w));node(r));out%20meta;';
+    }
+}
+
+if ($sContentURL) {
+    file_put_contents($sTemporaryFile, file_get_contents($sContentURL));
+    $bHaveDiff = true;
+}
+
+if ($bHaveDiff) {
+    // import generated change file
+    $sCMD = $sOsm2pgsqlCmd.' '.$sTemporaryFile;
+    echo $sCMD."\n";
+    exec($sCMD, $sJunk, $iErrorLevel);
+    if ($iErrorLevel) {
+        fail("osm2pgsql exited with error level $iErrorLevel\n");
+    }
+}
+
+if ($aResult['deduplicate']) {
+    $oDB =& getDB();
+
+    if (getPostgresVersion($oDB) < 9.3) {
+        fail('ERROR: deduplicate is only currently supported in postgresql 9.3');
+    }
+
+    $sSQL = 'select partition from country_name order by country_code';
+    $aPartitions = chksql($oDB->getCol($sSQL));
+    $aPartitions[] = 0;
+
+    // we don't care about empty search_name_* partitions, they can't contain mentions of duplicates
+    foreach ($aPartitions as $i => $sPartition) {
+        $sSQL = 'select count(*) from search_name_'.$sPartition;
+        $nEntries = chksql($oDB->getOne($sSQL));
+        if ($nEntries == 0) {
+            unset($aPartitions[$i]);
+        }
+    }
+
+    $sSQL = "select word_token,count(*) from word where substr(word_token, 1, 1) = ' '";
+    $sSQL .= ' and class is null and type is null and country_code is null';
+    $sSQL .= ' group by word_token having count(*) > 1 order by word_token';
+    $aDuplicateTokens = chksql($oDB->getAll($sSQL));
+    foreach ($aDuplicateTokens as $aToken) {
+        if (trim($aToken['word_token']) == '' || trim($aToken['word_token']) == '-') continue;
+        echo 'Deduping '.$aToken['word_token']."\n";
+        $sSQL = 'select word_id,';
+        $sSQL .= ' (select count(*) from search_name where nameaddress_vector @> ARRAY[word_id]) as num';
+        $sSQL .= " from word where word_token = '".$aToken['word_token'];
+        $sSQL .= "' and class is null and type is null and country_code is null order by num desc";
+        $aTokenSet = chksql($oDB->getAll($sSQL));
+
+        $aKeep = array_shift($aTokenSet);
+        $iKeepID = $aKeep['word_id'];
+
+        foreach ($aTokenSet as $aRemove) {
+            $sSQL = 'update search_name set';
+            $sSQL .= ' name_vector = array_replace(name_vector,'.$aRemove['word_id'].','.$iKeepID.'),';
+            $sSQL .= ' nameaddress_vector = array_replace(nameaddress_vector,'.$aRemove['word_id'].','.$iKeepID.')';
+            $sSQL .= ' where name_vector @> ARRAY['.$aRemove['word_id'].']';
+            chksql($oDB->query($sSQL));
+
+            $sSQL = 'update search_name set';
+            $sSQL .= ' nameaddress_vector = array_replace(nameaddress_vector,'.$aRemove['word_id'].','.$iKeepID.')';
+            $sSQL .= ' where nameaddress_vector @> ARRAY['.$aRemove['word_id'].']';
+            chksql($oDB->query($sSQL));
+
+            $sSQL = 'update location_area_country set';
+            $sSQL .= ' keywords = array_replace(keywords,'.$aRemove['word_id'].','.$iKeepID.')';
+            $sSQL .= ' where keywords @> ARRAY['.$aRemove['word_id'].']';
+            chksql($oDB->query($sSQL));
+
+            foreach ($aPartitions as $sPartition) {
+                $sSQL = 'update search_name_'.$sPartition.' set';
+                $sSQL .= ' name_vector = array_replace(name_vector,'.$aRemove['word_id'].','.$iKeepID.')';
+                $sSQL .= ' where name_vector @> ARRAY['.$aRemove['word_id'].']';
+                chksql($oDB->query($sSQL));
+
+                $sSQL = 'update location_area_country set';
+                $sSQL .= ' keywords = array_replace(keywords,'.$aRemove['word_id'].','.$iKeepID.')';
+                $sSQL .= ' where keywords @> ARRAY['.$aRemove['word_id'].']';
+                chksql($oDB->query($sSQL));
+            }
+
+            $sSQL = 'delete from word where word_id = '.$aRemove['word_id'];
+            chksql($oDB->query($sSQL));
+        }
+    }
+}
+
+if ($aResult['recompute-word-counts']) {
+    info('Recompute frequency of full-word search terms');
+    $sTemplate = file_get_contents(CONST_BasePath.'/sql/words_from_search_name.sql');
+    runSQLScript($sTemplate, true, true);
+}
+
+if ($aResult['index']) {
+    passthru(CONST_InstallPath.'/nominatim/nominatim -i -d '.$aDSNInfo['database'].' -P '.$aDSNInfo['port'].' -t '.$aResult['index-instances'].' -r '.$aResult['index-rank']);
+}
+
+if ($aResult['import-osmosis'] || $aResult['import-osmosis-all']) {
+    //
+    if (strpos(CONST_Replication_Url, 'download.geofabrik.de') !== false && CONST_Replication_Update_Interval < 86400) {
+        fail("Error: Update interval too low for download.geofabrik.de.  Please check install documentation (http://nominatim.org/release-docs/latest/Import-and-Update#setting-up-the-update-process)\n");
+    }
+
+    $sImportFile = CONST_InstallPath.'/osmosischange.osc';
+    $sCMDDownload = CONST_Pyosmium_Binary.' --server '.CONST_Replication_Url.' -o '.$sImportFile.' -s '.CONST_Replication_Max_Diff_size;
+    $sCMDImport = $sOsm2pgsqlCmd.' '.$sImportFile;
+    $sCMDIndex = CONST_InstallPath.'/nominatim/nominatim -i -d '.$aDSNInfo['database'].' -P '.$aDSNInfo['port'].' -t '.$aResult['index-instances'];
+
+    while (true) {
+        $fStartTime = time();
+        $aLastState = chksql($oDB->getRow('SELECT *, EXTRACT (EPOCH FROM lastimportdate) as unix_ts FROM import_status'));
+
+        if (!$aLastState['sequence_id']) {
+            echo "Updates not set up. Please run ./utils/update.php --init-updates.\n";
+            exit(1);
+        }
+
+        echo 'Currently at sequence '.$aLastState['sequence_id'].' ('.$aLastState['lastimportdate'].') - '.$aLastState['indexed']." indexed\n";
+
+        $sBatchEnd = $aLastState['lastimportdate'];
+        $iEndSequence = $aLastState['sequence_id'];
+
+        if ($aLastState['indexed'] == 't') {
+            // Sleep if the update interval has not yet been reached.
+            $fNextUpdate = $aLastState['unix_ts'] + CONST_Replication_Update_Interval;
+            if ($fNextUpdate > $fStartTime) {
+                $iSleepTime = $fNextUpdate - $fStartTime;
+                echo "Waiting for next update for $iSleepTime sec.";
+                sleep($iSleepTime);
+            }
+
+            // Download the next batch of changes.
+            do {
+                $fCMDStartTime = time();
+                $iNextSeq = (int) $aLastState['sequence_id'];
+                unset($aOutput);
+                echo "$sCMDDownload -I $iNextSeq\n";
+                unlink($sImportFile);
+                exec($sCMDDownload.' -I '.$iNextSeq, $aOutput, $iResult);
+
+                if ($iResult == 3) {
+                    echo 'No new updates. Sleeping for '.CONST_Replication_Recheck_Interval." sec.\n";
+                    sleep(CONST_Replication_Recheck_Interval);
+                } elseif ($iResult != 0) {
+                    echo 'ERROR: updates failed.';
+                    exit($iResult);
+                } else {
+                    $iEndSequence = (int)$aOutput[0];
                 }
-                $aPartitions[] = 0;
-
-               $sSQL = "select word_token,count(*) from word where substr(word_token, 1, 1) = ' ' and class is null and type is null and country_code is null group by word_token having count(*) > 1 order by word_token";
-               $aDuplicateTokens = $oDB->getAll($sSQL);
-               foreach($aDuplicateTokens as $aToken)
-               {
-                       if (trim($aToken['word_token']) == '' || trim($aToken['word_token']) == '-') continue;
-                       echo "Deduping ".$aToken['word_token']."\n";
-                       $sSQL = "select word_id,(select count(*) from search_name where nameaddress_vector @> ARRAY[word_id]) as num from word where word_token = '".$aToken['word_token']."' and class is null and type is null and country_code is null order by num desc";
-                       $aTokenSet = $oDB->getAll($sSQL);
-                       if (PEAR::isError($aTokenSet))
-                       {
-                               var_dump($aTokenSet, $sSQL);
-                               exit;
-                       }
-                       
-                       $aKeep = array_shift($aTokenSet);
-                       $iKeepID = $aKeep['word_id'];
-
-                       foreach($aTokenSet as $aRemove)
-                       {
-                               $sSQL = "update search_name set";
-                               $sSQL .= " name_vector = (name_vector - ".$aRemove['word_id'].")+".$iKeepID.",";
-                               $sSQL .= " nameaddress_vector = (nameaddress_vector - ".$aRemove['word_id'].")+".$iKeepID;
-                               $sSQL .= " where name_vector @> ARRAY[".$aRemove['word_id']."]";
-                               $x = $oDB->query($sSQL);
-                               if (PEAR::isError($x))
-                               {
-                                       var_dump($x);
-                                       exit;
-                               }
-
-                               $sSQL = "update search_name set";
-                               $sSQL .= " nameaddress_vector = (nameaddress_vector - ".$aRemove['word_id'].")+".$iKeepID;
-                               $sSQL .= " where nameaddress_vector @> ARRAY[".$aRemove['word_id']."]";
-                               $x = $oDB->query($sSQL);
-                               if (PEAR::isError($x))
-                               {
-                                       var_dump($x);
-                                       exit;
-                               }
-
-                               $sSQL = "update location_area_country set";
-                               $sSQL .= " keywords = (keywords - ".$aRemove['word_id'].")+".$iKeepID;
-                               $sSQL .= " where keywords @> ARRAY[".$aRemove['word_id']."]";
-                               $x = $oDB->query($sSQL);
-                               if (PEAR::isError($x))
-                               {
-                                       var_dump($x);
-                                       exit;
-                               }
-
-                               foreach ($aPartitions as $sPartition)
-                               {
-                                       $sSQL = "update search_name_".$sPartition." set";
-                                       $sSQL .= " name_vector = (name_vector - ".$aRemove['word_id'].")+".$iKeepID.",";
-                                       $sSQL .= " nameaddress_vector = (nameaddress_vector - ".$aRemove['word_id'].")+".$iKeepID;
-                                       $sSQL .= " where name_vector @> ARRAY[".$aRemove['word_id']."]";
-                                       $x = $oDB->query($sSQL);
-                                       if (PEAR::isError($x))
-                                       {
-                                               var_dump($x);
-                                               exit;
-                                       }
-
-                                       $sSQL = "update search_name_".$sPartition." set";
-                                       $sSQL .= " nameaddress_vector = (nameaddress_vector - ".$aRemove['word_id'].")+".$iKeepID;
-                                       $sSQL .= " where nameaddress_vector @> ARRAY[".$aRemove['word_id']."]";
-                                       $x = $oDB->query($sSQL);
-                                       if (PEAR::isError($x))
-                                       {
-                                               var_dump($x);
-                                               exit;
-                                       }
-
-                                       $sSQL = "update location_area_country set";
-                                       $sSQL .= " keywords = (keywords - ".$aRemove['word_id'].")+".$iKeepID;
-                                       $sSQL .= " where keywords @> ARRAY[".$aRemove['word_id']."]";
-                                       $x = $oDB->query($sSQL);
-                                       if (PEAR::isError($x))
-                                       {
-                                               var_dump($x);
-                                               exit;
-                                       }
-                               }
-
-                               $sSQL = "delete from word where word_id = ".$aRemove['word_id'];
-                               $x = $oDB->query($sSQL);
-                               if (PEAR::isError($x))
-                               {
-                                       var_dump($x);
-                                       exit;
-                               }
-                       }
-
-               }
-       }
-
-       if ($aResult['index'])
-       {
-               index($aResult, $sDatabaseDSN);
-       }
-
-       if ($aResult['import-osmosis'] || $aResult['import-osmosis-all'])
-       {
-               $sImportFile = CONST_BasePath.'/data/osmosischange.osc';
-               $sOsmosisCMD = CONST_BasePath.'/osmosis-0.38/bin/osmosis';
-               $sOsmosisConfigDirectory = CONST_BasePath.'/settings';
-               $sDatabaseName = 'nominatim';
-               $sCMDDownload = $sOsmosisCMD.' --read-replication-interval workingDirectory='.$sOsmosisConfigDirectory.' --simplify-change --write-xml-change '.$sImportFile;
-               $sCMDImport = $sBasePath.'/osm2pgsql/osm2pgsql -klas -C 2000 -O gazetteer -d '.$sDatabaseName.' '.$sImportFile;
-               $sCMDIndex = $sBasePath.'/nominatim/nominatim -i -t 15 -F ';
-//             $sCMDIndex = $sBasePath.'/nominatim/nominatim -i -t 15 ';
-               while(true)
-               {
-                       $fStartTime = time();
-                       $iFileSize = 1001;
-
-                       // Logic behind this is that osm2pgsql locks the database quite a bit
-                       // So it is better to import lots of small files
-                       // But indexing works most efficiently on large amounts of data
-                       // So do lots of small imports and a BIG index
-
-//                     while($aResult['import-osmosis-all'] && $iFileSize > 1000)
-//                     {
-                               if (!file_exists($sImportFile))
-                               {
-                                       // Use osmosis to download the file
-                                       $fCMDStartTime = time();
-                                       echo $sCMDDownload."\n";
-                                       exec($sCMDDownload, $sJunk, $iErrorLevel);
-                                       while ($iErrorLevel == 1)
-                                       {
-                                               echo "Error: $iErrorLevel\n";
-                                               sleep(60);
-                                               echo 'Re-trying: '.$sCMDDownload."\n";
-                                               exec($sCMDDownload, $sJunk, $iErrorLevel);
-                                       }
-                                       $iFileSize = filesize($sImportFile);
-                                       $sBatchEnd = getosmosistimestamp($sOsmosisConfigDirectory);
-                                       echo "Completed for $sBatchEnd in ".round((time()-$fCMDStartTime)/60,2)." minutes\n";
-                                       $sSQL = "INSERT INTO import_osmosis_log values ('$sBatchEnd',$iFileSize,'".date('Y-m-d H:i:s',$fCMDStartTime)."','".date('Y-m-d H:i:s')."','osmosis')";
-                                       $oDB->query($sSQL);
-                               }
-
-                               $iFileSize = filesize($sImportFile);
-                               $sBatchEnd = getosmosistimestamp($sOsmosisConfigDirectory);
-               
-                               // Import the file
-                               $fCMDStartTime = time();
-                               echo $sCMDImport."\n";
-                               exec($sCMDImport, $sJunk, $iErrorLevel);
-                               if ($iErrorLevel)
-                               {
-                                       echo "Error: $iErrorLevel\n";
-                                       exit;
-                               }
-                               echo "Completed for $sBatchEnd in ".round((time()-$fCMDStartTime)/60,2)." minutes\n";
-                               $sSQL = "INSERT INTO import_osmosis_log values ('$sBatchEnd',$iFileSize,'".date('Y-m-d H:i:s',$fCMDStartTime)."','".date('Y-m-d H:i:s')."','osm2pgsql')";
-                               var_Dump($sSQL);
-                               $oDB->query($sSQL);
-
-                               // Archive for debug?
-                               unlink($sImportFile);
-
-                               $sBatchEnd = getosmosistimestamp($sOsmosisConfigDirectory);
-
-                               // Index file
-                               $fCMDStartTime = time();
-                               $iFileID = $oDB->getOne('select nextval(\'file\')');
-                               if (PEAR::isError($iFileID))
-                               {
-                                       echo $oDB->getMessage()."\n";
-                                       exit;
-                               } 
-                               $sFileDir = CONST_BasePath.'/export/diff/';
-                               $sFileDir .= str_pad(floor($iFileID/1000000), 3, '0', STR_PAD_LEFT);
-                               $sFileDir .= '/'.str_pad(floor($iFileID/1000) % 1000, 3, '0', STR_PAD_LEFT);
-
-                               if (!is_dir($sFileDir)) mkdir($sFileDir, 0777, true);
-                               $sThisIndexCmd = $sCMDIndex;
-                               $sThisIndexCmd .= $sFileDir;
-                               $sThisIndexCmd .= '/'.str_pad($iFileID % 1000, 3, '0', STR_PAD_LEFT);
-                               $sThisIndexCmd .= ".npi.out";
-                               echo "$sThisIndexCmd\n";
-
-                               preg_match('#^([0-9]{4})-([0-9]{2})-([0-9]{2})#', $sBatchEnd, $aBatchMatch);
-                               $sFileDir = CONST_BasePath.'/export/index/';
-                               $sFileDir .= $aBatchMatch[1].'/'.$aBatchMatch[2];
-
-                               if (!is_dir($sFileDir)) mkdir($sFileDir, 0777, true);
-                               file_put_contents($sFileDir.'/'.$aBatchMatch[3].'.idx', "$sBatchEnd\t$iFileID\n", FILE_APPEND);
-
-                               exec($sThisIndexCmd, $sJunk, $iErrorLevel);
-                               if ($iErrorLevel)
-                               {
-                                       echo "Error: $iErrorLevel\n";
-                                       exit;
-                               }
-
-                               $sFileDir = CONST_BasePath.'/export/diff/';
-                               $sFileDir .= str_pad(floor($iFileID/1000000), 3, '0', STR_PAD_LEFT);
-                               $sFileDir .= '/'.str_pad(floor($iFileID/1000) % 1000, 3, '0', STR_PAD_LEFT);
-
-                               $sThisIndexCmd = 'bzip2 -z9 '.$sFileDir.'/'.str_pad($iFileID % 1000, 3, '0', STR_PAD_LEFT).".npi.out";
-                               echo "$sThisIndexCmd\n";
-                               exec($sThisIndexCmd, $sJunk, $iErrorLevel);
-                               if ($iErrorLevel)
-                               {
-                                       echo "Error: $iErrorLevel\n";
-                                       exit;
-                               }
-
-                               rename($sFileDir.'/'.str_pad($iFileID % 1000, 3, '0', STR_PAD_LEFT).".npi.out.bz2",
-                                       $sFileDir.'/'.str_pad($iFileID % 1000, 3, '0', STR_PAD_LEFT).".npi.bz2");
-
-                               echo "Completed for $sBatchEnd in ".round((time()-$fCMDStartTime)/60,2)." minutes\n";
-                               $sSQL = "INSERT INTO import_osmosis_log values ('$sBatchEnd',$iFileSize,'".date('Y-m-d H:i:s',$fCMDStartTime)."','".date('Y-m-d H:i:s')."','index')";
-                               $oDB->query($sSQL);
-
-                               $sSQL = "update import_status set lastimportdate = '$sBatchEnd'";
-                               $oDB->query($sSQL);
-
-
-                               $fDuration = time() - $fStartTime;
-                               echo "Completed for $sBatchEnd in ".round($fDuration/60,2)."\n";
-                               if (!$aResult['import-osmosis-all']) exit;
-//                     }
-                       echo "Sleeping ".max(0,60-$fDuration)." seconds\n";
-                       sleep(max(0,60-$fDuration));
-               }
-               
-       }
-
-       if ($aResult['import-npi-all'])
-       {
-               $iNPIID = $oDB->getOne('select max(npiid) from import_npi_log');
-               if (PEAR::isError($iNPIID))
-               {
-                       var_dump($iNPIID);
-                       exit;
-               }
-               $sConfigDirectory = CONST_BasePath.'/settings';
-               $sCMDImportTemplate = $sBasePath.'/nominatim/nominatim -d gazetteer -P 5433 -I -T '.$sBasePath.'/nominatim/partitionedtags.def -F ';
-               while(true)
-               {
-                       $fStartTime = time();
-
-                       $iNPIID++;
-
-                       $sImportFile = CONST_BasePath.'/export/diff/';
-                       $sImportFile .= str_pad(floor($iNPIID/1000000), 3, '0', STR_PAD_LEFT);
-                       $sImportFile .= '/'.str_pad(floor($iNPIID/1000) % 1000, 3, '0', STR_PAD_LEFT);
-                       $sImportFile .= '/'.str_pad($iNPIID % 1000, 3, '0', STR_PAD_LEFT);
-                       $sImportFile .= ".npi";
-                       while(!file_exists($sImportFile) && !file_exists($sImportFile.'.bz2'))
-                       {
-                               echo "sleep (waiting for $sImportFile)\n";
-                               sleep(10);
-                       }
-                       if (file_exists($sImportFile.'.bz2')) $sImportFile .= '.bz2';
-
-                       $iFileSize = filesize($sImportFile);
-               
-                       // Import the file
-                       $fCMDStartTime = time();
-                       $sCMDImport = $sCMDImportTemplate . $sImportFile;
-                       echo $sCMDImport."\n";
-                       exec($sCMDImport, $sJunk, $iErrorLevel);
-                       if ($iErrorLevel)
-                       {
-                               echo "Error: $iErrorLevel\n";
-                               exit;
-                       }
-                       $sBatchEnd = $iNPIID;
-                       echo "Completed for $sBatchEnd in ".round((time()-$fCMDStartTime)/60,2)." minutes\n";
-                       $sSQL = "INSERT INTO import_npi_log values ($iNPIID, null, $iFileSize,'".date('Y-m-d H:i:s',$fCMDStartTime)."','".date('Y-m-d H:i:s')."','import')";
-                       var_Dump($sSQL);
-                       $oDB->query($sSQL);
-               }
-               
-       }
-
-       function getosmosistimestamp($sOsmosisConfigDirectory)
-       {
-               $sStateFile = file_get_contents($sOsmosisConfigDirectory.'/state.txt');
-               preg_match('#timestamp=(.+)#', $sStateFile, $aResult);
-               return str_replace('\:',':',$aResult[1]);
-       }
+            } while ($iResult);
+
+            // get the newest object from the diff file
+            $sBatchEnd = 0;
+            $iRet = 0;
+            exec(CONST_BasePath.'/utils/osm_file_date.py '.$sImportFile, $sBatchEnd, $iRet);
+            if ($iRet == 5) {
+                echo "Diff file is empty. skipping import.\n";
+                if (!$aResult['import-osmosis-all']) {
+                    exit(0);
+                } else {
+                    continue;
+                }
+            }
+            if ($iRet != 0) {
+                fail('Error getting date from diff file.');
+            }
+            $sBatchEnd = $sBatchEnd[0];
+
+            // Import the file
+            $fCMDStartTime = time();
+            echo $sCMDImport."\n";
+            unset($sJunk);
+            exec($sCMDImport, $sJunk, $iErrorLevel);
+            if ($iErrorLevel) {
+                echo "Error executing osm2pgsql: $iErrorLevel\n";
+                exit($iErrorLevel);
+            }
+
+            // write the update logs
+            $iFileSize = filesize($sImportFile);
+            $sSQL = 'INSERT INTO import_osmosis_log';
+            $sSQL .= '(batchend, batchseq, batchsize, starttime, endtime, event)';
+            $sSQL .= " values ('$sBatchEnd',$iEndSequence,$iFileSize,'";
+            $sSQL .= date('Y-m-d H:i:s', $fCMDStartTime)."','";
+            $sSQL .= date('Y-m-d H:i:s')."','import')";
+            var_Dump($sSQL);
+            chksql($oDB->query($sSQL));
+
+            // update the status
+            $sSQL = "UPDATE import_status SET lastimportdate = '$sBatchEnd', indexed=false, sequence_id = $iEndSequence";
+            var_Dump($sSQL);
+            chksql($oDB->query($sSQL));
+            echo date('Y-m-d H:i:s')." Completed download step for $sBatchEnd in ".round((time()-$fCMDStartTime)/60, 2)." minutes\n";
+        }
+
+        // Index file
+        if (!$aResult['no-index']) {
+            $sThisIndexCmd = $sCMDIndex;
+            $fCMDStartTime = time();
+
+            echo "$sThisIndexCmd\n";
+            exec($sThisIndexCmd, $sJunk, $iErrorLevel);
+            if ($iErrorLevel) {
+                echo "Error: $iErrorLevel\n";
+                exit($iErrorLevel);
+            }
+
+            $sSQL = 'INSERT INTO import_osmosis_log';
+            $sSQL .= '(batchend, batchseq, batchsize, starttime, endtime, event)';
+            $sSQL .= " values ('$sBatchEnd',$iEndSequence,$iFileSize,'";
+            $sSQL .= date('Y-m-d H:i:s', $fCMDStartTime)."','";
+            $sSQL .= date('Y-m-d H:i:s')."','index')";
+            var_Dump($sSQL);
+            $oDB->query($sSQL);
+            echo date('Y-m-d H:i:s')." Completed index step for $sBatchEnd in ".round((time()-$fCMDStartTime)/60, 2)." minutes\n";
+
+            $sSQL = 'update import_status set indexed = true';
+            $oDB->query($sSQL);
+        }
+
+        $fDuration = time() - $fStartTime;
+        echo date('Y-m-d H:i:s')." Completed all for $sBatchEnd in ".round($fDuration/60, 2)." minutes\n";
+        if (!$aResult['import-osmosis-all']) exit(0);
+    }
+}