mirror of https://gitee.com/bigwinds/arangodb
97 lines
3.5 KiB
JavaScript
97 lines
3.5 KiB
JavaScript
////////////////////////////////////////////////////////////////////////////////
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/// @brief version check at the start of the server
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///
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/// @file
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///
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/// DISCLAIMER
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///
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/// Copyright 2004-2012 triAGENS GmbH, Cologne, Germany
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain a copy of the License at
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///
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/// http://www.apache.org/licenses/LICENSE-2.0
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///
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/// Unless required by applicable law or agreed to in writing, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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///
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/// Copyright holder is triAGENS GmbH, Cologne, Germany
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///
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/// @author Jan Steemann
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/// @author Copyright 2012, triAGENS GmbH, Cologne, Germany
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////////////////////////////////////////////////////////////////////////////////
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// -----------------------------------------------------------------------------
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// --SECTION-- version check
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// -----------------------------------------------------------------------------
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////////////////////////////////////////////////////////////////////////////////
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/// @addtogroup ArangoDB
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/// @{
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////////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////////
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/// @brief updates the database
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////////////////////////////////////////////////////////////////////////////////
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(function() {
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var console = require("console");
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// path to the VERSION file
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var versionFile = DATABASEPATH + "/VERSION";
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var lastVersion = null;
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if (! FS_EXISTS(versionFile)) {
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console.error("No version information file found in database directory.");
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return false;
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}
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// VERSION file exists, read its contents
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var versionInfo = SYS_READ(versionFile);
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if (versionInfo != '') {
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var versionValues = JSON.parse(versionInfo);
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if (versionValues && versionValues.version && ! isNaN(versionValues.version)) {
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lastVersion = parseFloat(versionValues.version);
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}
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}
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if (lastVersion == null) {
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console.error("No version information file found in database directory.");
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return false;
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}
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var currentServerVersion = VERSION.match(/^(\d+\.\d+).*$/);
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if (! currentServerVersion) {
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// server version is invalid for some reason
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console.error("Unexpected arangodb server version found.");
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return false;
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}
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var currentVersion = parseFloat(currentServerVersion[1]);
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if (lastVersion != null && lastVersion > currentVersion) {
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// downgrade??
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console.error("Database directory version is higher than server version.");
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console.error("It seems like you are running arangodb on a database directory that was created with a newer version. This is not supported.");
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// still, allow the start
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}
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return true;
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})();
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////////////////////////////////////////////////////////////////////////////////
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/// @}
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////////////////////////////////////////////////////////////////////////////////
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// -----------------------------------------------------------------------------
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// --SECTION-- END-OF-FILE
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// -----------------------------------------------------------------------------
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// Local Variables:
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// mode: outline-minor
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// outline-regexp: "^\\(/// @brief\\|/// @addtogroup\\|// --SECTION--\\|/// @page\\|/// @}\\)"
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// End:
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