287 lines
8.4 KiB
PHP
287 lines
8.4 KiB
PHP
<?php
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/* -*- tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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# ***** BEGIN LICENSE BLOCK *****
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# This file is part of InDefero, an open source project management application.
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# Copyright (C) 2008 Céondo Ltd and contributors.
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#
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# InDefero is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# InDefero is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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#
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# ***** END LICENSE BLOCK ***** */
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/**
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* Manage differents SCM systems.
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*
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* This is the base class with the different required methods to be
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* implemented by the SCMs. Each SCM backend need to extend this
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* class. We are not using an interface because this is not really
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* needed.
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*
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* The philosophy behind the interface is not to provide a wrapper
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* around the different SCMs but to provide methods to retrieve in the
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* most efficient way the informations to be displayed/needed in the
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* web interface. This means that each SCM can use the best options,
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* including caching to retrieve the informations.
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*
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* Note on caching: You must not cache ephemeral information like the
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* changelog, but you can cache the commit info (except with
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* subversion where you can change commit info...).
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*
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* All the output of the methods must be serializable. This means that
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* if you are parsing XML you need to correctly cast the results as
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* string when needed.
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*/
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class IDF_Scm
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{
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/**
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* String template for consistent error messages.
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*/
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public $error_tpl = 'Error command "%s" returns code %d and output: %s';
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/**
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* Path to the repository.
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*/
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public $repo = '';
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/**
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* Corresponding project object.
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*/
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public $project = null;
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/**
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* Cache storage.
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*
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* It must only be used to store data for the lifetime of the
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* object. For example if you need to get the list of branches in
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* several functions, better to try to get from the cache first.
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*/
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protected $cache = array();
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/**
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* Default constructor.
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*/
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public function __construct($repo, $project=null)
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{
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$this->repo = $repo;
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$this->project = $project;
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}
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/**
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* Returns an instance of the correct scm backend object.
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*
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* @param IDF_Project
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* @return Object
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*/
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public static function get($project=null)
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{
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// Get scm type from project conf ; defaults to git
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// We will need to cache the factory
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$scm = $project->getConf()->getVal('scm', 'git');
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$scms = Pluf::f('allowed_scm');
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return call_user_func(array($scms[$scm], 'factory'), $project);
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}
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/**
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* Check if the backend is available for display.
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*
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* @return bool Available
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*/
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public function isAvailable()
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{
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throw new Pluf_Exception_NotImplemented();
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}
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/**
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* Returns the list of branches.
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*
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* @return array For example array('trunk', '1.0branch')
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*/
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public function getBranches()
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{
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throw new Pluf_Exception_NotImplemented();
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}
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/**
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* Returns the list of tags.
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*
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* @return array For example array('v0.9', 'v1.0')
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*/
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public function getTags()
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{
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throw new Pluf_Exception_NotImplemented();
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}
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/**
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* Returns the main branch.
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*
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* The main branch is the one displayed by default. For example
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* master, trunk or tip.
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*
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* @return string
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*/
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public function getMainBranch()
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{
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throw new Pluf_Exception_NotImplemented();
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}
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/**
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* Returns the list of files in a given folder.
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*
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* The list is an array of standard class objects with attributes
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* for each file/directory/external element.
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*
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* This is the most important method of the SCM backend as this is
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* the one conveying the speed feeling of the application. All the
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* dirty optimization tricks are allowed there.
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*
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* @param string Revision or commit
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* @param string Folder ('/')
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* @param string Branch (null)
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* @return array
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*/
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public function getTree($rev, $folder='/', $branch=null)
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{
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throw new Pluf_Exception_NotImplemented();
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}
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/**
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* Get commit details.
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*
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* @param string Commit or revision number
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* @param bool Get commit diff (false)
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* @return stdClass
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*/
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public function getCommit($commit, $getdiff=false)
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{
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throw new Pluf_Exception_NotImplemented();
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}
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/**
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* Get latest changes.
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*
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* It default to the main branch. If possible you should code in a
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* way to avoid repetitive calls to getCommit. Try to be
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* efficient.
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*
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* @param string Branch (null)
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* @param int Number of changes (25)
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* @return array List of commits
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*/
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public function getChangeLog($branch=null, $n=10)
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{
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throw new Pluf_Exception_NotImplemented();
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}
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/**
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* Given the string describing the author from the log find the
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* author in the database.
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*
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* If the input is an array, it will return an array of results.
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*
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* @param mixed string/array Author
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* @return mixed Pluf_User or null or array
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*/
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public function findAuthor($author)
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{
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throw new Pluf_Exception_NotImplemented();
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}
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/**
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* Given a revision and a file path, retrieve the file content.
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*
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* The third parameter is to only request the command that is used
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* to get the file content. This is used when downloading a file
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* at a given revision as it can be passed to a
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* Pluf_HTTP_Response_CommandPassThru reponse. This allows to
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* stream a large response without buffering it in memory.
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*
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* The file definition can be a hash or a path depending on the
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* SCM.
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*
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* @param string File definition
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* @param string Revision ('')
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* @param bool Returns command only (false)
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* @return string File content
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*/
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public function getFile($def, $rev='', $cmd_only=false)
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{
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throw new Pluf_Exception_NotImplemented();
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}
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/**
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* Equivalent to exec but with caching.
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*
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* @param string Command
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* @param &array Output
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* @param &int Return value
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* @return string Last line of the output
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*/
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public static function exec($command, &$output=array(), &$return=0)
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{
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$command = Pluf::f('idf_exec_cmd_prefix', '').$command;
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$key = md5($command);
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$cache = Pluf_Cache::factory();
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if (null === ($res=$cache->get($key))) {
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$ll = exec($command, $output, $return);
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if ($return != 0 and Pluf::f('debug_scm', false)) {
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throw new IDF_Scm_Exception(sprintf('Error when running command: "%s", return code: %d', $command, $return));
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}
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$cache->set($key, array($ll, $return, $output));
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} else {
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list($ll, $return, $output) = $res;
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}
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return $ll;
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}
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/**
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* Equivalent to shell_exec but with caching.
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*
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* @param string Command
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* @return string Output of the command
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*/
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public static function shell_exec($command)
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{
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$command = Pluf::f('idf_exec_cmd_prefix', '').$command;
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$key = md5($command);
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$cache = Pluf_Cache::factory();
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if (null === ($res=$cache->get($key))) {
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$res = shell_exec($command);
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$cache->set($key, $res);
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}
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return $res;
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}
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/**
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* Sync the changes in the repository with the timeline.
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*
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*/
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public static function syncTimeline($project)
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{
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$cache = Pluf_Cache::factory();
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$key = 'IDF_Scm:'.$project->shortname.':lastsync';
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if (null === ($res=$cache->get($key))) {
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$scm = IDF_Scm::get($project);
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foreach ($scm->getBranches() as $branche) {
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foreach ($scm->getChangeLog($branche, 25) as $change) {
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IDF_Commit::getOrAdd($change, $project);
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}
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}
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$cache->set($key, true, (int)(Pluf::f('cache_timeout', 300)/2));
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}
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}
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}
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