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1 <?php |
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2 // $Id: update.compare.inc,v 1.8.2.5 2009/06/09 11:08:32 goba Exp $ |
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3 |
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4 /** |
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5 * @file |
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6 * Code required only when comparing available updates to existing data. |
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7 */ |
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8 |
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9 /** |
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10 * Fetch an array of installed and enabled projects. |
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11 * |
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12 * This is only responsible for generating an array of projects (taking into |
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13 * account projects that include more than one module or theme). Other |
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14 * information like the specific version and install type (official release, |
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15 * dev snapshot, etc) is handled later in update_process_project_info() since |
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16 * that logic is only required when preparing the status report, not for |
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17 * fetching the available release data. |
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18 * |
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19 * This array is fairly expensive to construct, since it involves a lot of |
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20 * disk I/O, so we cache the results into the {cache_update} table using the |
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21 * 'update_project_projects' cache ID. However, since this is not the data |
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22 * about available updates fetched from the network, it is ok to invalidate it |
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23 * somewhat quickly. If we keep this data for very long, site administrators |
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24 * are more likely to see incorrect results if they upgrade to a newer version |
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25 * of a module or theme but do not visit certain pages that automatically |
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26 * clear this cache. |
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27 * |
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28 * @see update_process_project_info() |
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29 * @see update_calculate_project_data() |
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30 * @see update_project_cache() |
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31 */ |
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32 function update_get_projects() { |
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33 static $projects = array(); |
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34 if (empty($projects)) { |
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35 // Retrieve the projects from cache, if present. |
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36 $projects = update_project_cache('update_project_projects'); |
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37 if (empty($projects)) { |
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38 // Still empty, so we have to rebuild the cache. |
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39 _update_process_info_list($projects, module_rebuild_cache(), 'module'); |
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40 _update_process_info_list($projects, system_theme_data(), 'theme'); |
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41 // Allow other modules to alter projects before fetching and comparing. |
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42 drupal_alter('update_projects', $projects); |
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43 // Cache the site's project data for at most 1 hour. |
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44 _update_cache_set('update_project_projects', $projects, time() + 3600); |
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45 } |
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46 } |
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47 return $projects; |
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48 } |
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49 |
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50 /** |
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51 * Populate an array of project data. |
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52 */ |
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53 function _update_process_info_list(&$projects, $list, $project_type) { |
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54 foreach ($list as $file) { |
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55 if (empty($file->status)) { |
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56 // Skip disabled modules or themes. |
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57 continue; |
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58 } |
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59 |
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60 // Skip if the .info file is broken. |
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61 if (empty($file->info)) { |
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62 continue; |
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63 } |
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64 |
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65 // If the .info doesn't define the 'project', try to figure it out. |
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66 if (!isset($file->info['project'])) { |
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67 $file->info['project'] = update_get_project_name($file); |
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68 } |
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69 |
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70 // If we still don't know the 'project', give up. |
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71 if (empty($file->info['project'])) { |
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72 continue; |
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73 } |
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74 |
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75 // If we don't already know it, grab the change time on the .info file |
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76 // itself. Note: we need to use the ctime, not the mtime (modification |
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77 // time) since many (all?) tar implementations will go out of their way to |
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78 // set the mtime on the files it creates to the timestamps recorded in the |
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79 // tarball. We want to see the last time the file was changed on disk, |
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80 // which is left alone by tar and correctly set to the time the .info file |
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81 // was unpacked. |
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82 if (!isset($file->info['_info_file_ctime'])) { |
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83 $info_filename = dirname($file->filename) .'/'. $file->name .'.info'; |
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84 $file->info['_info_file_ctime'] = filectime($info_filename); |
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85 } |
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86 |
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87 $project_name = $file->info['project']; |
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88 if (!isset($projects[$project_name])) { |
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89 // Only process this if we haven't done this project, since a single |
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90 // project can have multiple modules or themes. |
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91 $projects[$project_name] = array( |
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92 'name' => $project_name, |
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93 'info' => $file->info, |
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94 'datestamp' => isset($file->info['datestamp']) ? $file->info['datestamp'] : 0, |
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95 'includes' => array($file->name => $file->info['name']), |
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96 'project_type' => $project_name == 'drupal' ? 'core' : $project_type, |
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97 ); |
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98 } |
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99 else { |
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100 $projects[$project_name]['includes'][$file->name] = $file->info['name']; |
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101 $projects[$project_name]['info']['_info_file_ctime'] = max($projects[$project_name]['info']['_info_file_ctime'], $file->info['_info_file_ctime']); |
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102 } |
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103 } |
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104 } |
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105 |
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106 /** |
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107 * Given a $file object (as returned by system_get_files_database()), figure |
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108 * out what project it belongs to. |
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109 * |
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110 * @see system_get_files_database() |
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111 */ |
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112 function update_get_project_name($file) { |
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113 $project_name = ''; |
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114 if (isset($file->info['project'])) { |
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115 $project_name = $file->info['project']; |
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116 } |
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117 elseif (isset($file->info['package']) && (strpos($file->info['package'], 'Core -') !== FALSE)) { |
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118 $project_name = 'drupal'; |
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119 } |
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120 elseif (in_array($file->name, array('bluemarine', 'chameleon', 'garland', 'marvin', 'minnelli', 'pushbutton'))) { |
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121 // Unfortunately, there's no way to tell if a theme is part of core, |
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122 // so we must hard-code a list here. |
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123 $project_name = 'drupal'; |
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124 } |
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125 return $project_name; |
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126 } |
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127 |
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128 /** |
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129 * Process the list of projects on the system to figure out the currently |
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130 * installed versions, and other information that is required before we can |
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131 * compare against the available releases to produce the status report. |
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132 * |
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133 * @param $projects |
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134 * Array of project information from update_get_projects(). |
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135 */ |
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136 function update_process_project_info(&$projects) { |
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137 foreach ($projects as $key => $project) { |
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138 // Assume an official release until we see otherwise. |
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139 $install_type = 'official'; |
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140 |
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141 $info = $project['info']; |
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142 |
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143 if (isset($info['version'])) { |
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144 // Check for development snapshots |
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145 if (preg_match('@(dev|HEAD)@', $info['version'])) { |
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146 $install_type = 'dev'; |
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147 } |
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148 |
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149 // Figure out what the currently installed major version is. We need |
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150 // to handle both contribution (e.g. "5.x-1.3", major = 1) and core |
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151 // (e.g. "5.1", major = 5) version strings. |
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152 $matches = array(); |
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153 if (preg_match('/^(\d+\.x-)?(\d+)\..*$/', $info['version'], $matches)) { |
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154 $info['major'] = $matches[2]; |
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155 } |
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156 elseif (!isset($info['major'])) { |
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157 // This would only happen for version strings that don't follow the |
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158 // drupal.org convention. We let contribs define "major" in their |
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159 // .info in this case, and only if that's missing would we hit this. |
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160 $info['major'] = -1; |
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161 } |
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162 } |
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163 else { |
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164 // No version info available at all. |
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165 $install_type = 'unknown'; |
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166 $info['version'] = t('Unknown'); |
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167 $info['major'] = -1; |
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168 } |
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169 |
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170 // Finally, save the results we care about into the $projects array. |
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171 $projects[$key]['existing_version'] = $info['version']; |
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172 $projects[$key]['existing_major'] = $info['major']; |
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173 $projects[$key]['install_type'] = $install_type; |
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174 } |
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175 } |
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176 |
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177 /** |
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178 * Given the installed projects and the available release data retrieved from |
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179 * remote servers, calculate the current status. |
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180 * |
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181 * This function is the heart of the update status feature. It iterates over |
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182 * every currently installed project. For each one, it first checks if the |
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183 * project has been flagged with a special status like "unsupported" or |
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184 * "insecure", or if the project node itself has been unpublished. In any of |
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185 * those cases, the project is marked with an error and the next project is |
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186 * considered. |
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187 * |
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188 * If the project itself is valid, the function decides what major release |
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189 * series to consider. The project defines what the currently supported major |
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190 * versions are for each version of core, so the first step is to make sure |
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191 * the current version is still supported. If so, that's the target version. |
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192 * If the current version is unsupported, the project maintainer's recommended |
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193 * major version is used. There's also a check to make sure that this function |
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194 * never recommends an earlier release than the currently installed major |
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195 * version. |
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196 * |
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197 * Given a target major version, it scans the available releases looking for |
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198 * the specific release to recommend (avoiding beta releases and development |
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199 * snapshots if possible). This is complicated to describe, but an example |
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200 * will help clarify. For the target major version, find the highest patch |
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201 * level. If there is a release at that patch level with no extra ("beta", |
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202 * etc), then we recommend the release at that patch level with the most |
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203 * recent release date. If every release at that patch level has extra (only |
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204 * betas), then recommend the latest release from the previous patch |
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205 * level. For example: |
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206 * |
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207 * 1.6-bugfix <-- recommended version because 1.6 already exists. |
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208 * 1.6 |
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209 * |
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210 * or |
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211 * |
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212 * 1.6-beta |
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213 * 1.5 <-- recommended version because no 1.6 exists. |
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214 * 1.4 |
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215 * |
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216 * It also looks for the latest release from the same major version, even a |
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217 * beta release, to display to the user as the "Latest version" option. |
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218 * Additionally, it finds the latest official release from any higher major |
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219 * versions that have been released to provide a set of "Also available" |
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220 * options. |
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221 * |
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222 * Finally, and most importantly, it keeps scanning the release history until |
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223 * it gets to the currently installed release, searching for anything marked |
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224 * as a security update. If any security updates have been found between the |
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225 * recommended release and the installed version, all of the releases that |
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226 * included a security fix are recorded so that the site administrator can be |
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227 * warned their site is insecure, and links pointing to the release notes for |
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228 * each security update can be included (which, in turn, will link to the |
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229 * official security announcements for each vulnerability). |
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230 * |
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231 * This function relies on the fact that the .xml release history data comes |
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232 * sorted based on major version and patch level, then finally by release date |
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233 * if there are multiple releases such as betas from the same major.patch |
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234 * version (e.g. 5.x-1.5-beta1, 5.x-1.5-beta2, and 5.x-1.5). Development |
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235 * snapshots for a given major version are always listed last. |
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236 * |
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237 * The results of this function are expensive to compute, especially on sites |
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238 * with lots of modules or themes, since it involves a lot of comparisons and |
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239 * other operations. Therefore, we cache the results into the {cache_update} |
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240 * table using the 'update_project_data' cache ID. However, since this is not |
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241 * the data about available updates fetched from the network, it is ok to |
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242 * invalidate it somewhat quickly. If we keep this data for very long, site |
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243 * administrators are more likely to see incorrect results if they upgrade to |
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244 * a newer version of a module or theme but do not visit certain pages that |
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245 * automatically clear this cache. |
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246 * |
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247 * @param $available |
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248 * Array of data about available project releases. |
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249 * |
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250 * @see update_get_available() |
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251 * @see update_get_projects() |
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252 * @see update_process_project_info() |
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253 * @see update_project_cache() |
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254 */ |
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255 function update_calculate_project_data($available) { |
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256 // Retrieve the projects from cache, if present. |
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257 $projects = update_project_cache('update_project_data'); |
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258 // If $projects is empty, then the cache must be rebuilt. |
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259 // Otherwise, return the cached data and skip the rest of the function. |
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260 if (!empty($projects)) { |
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261 return $projects; |
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262 } |
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263 $projects = update_get_projects(); |
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264 update_process_project_info($projects); |
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265 foreach ($projects as $project => $project_info) { |
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266 if (isset($available[$project])) { |
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267 |
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268 // If the project status is marked as something bad, there's nothing |
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269 // else to consider. |
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270 if (isset($available[$project]['project_status'])) { |
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271 switch ($available[$project]['project_status']) { |
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272 case 'insecure': |
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273 $projects[$project]['status'] = UPDATE_NOT_SECURE; |
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274 if (empty($projects[$project]['extra'])) { |
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275 $projects[$project]['extra'] = array(); |
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276 } |
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277 $projects[$project]['extra'][] = array( |
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278 'class' => 'project-not-secure', |
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279 'label' => t('Project not secure'), |
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280 'data' => t('This project has been labeled insecure by the Drupal security team, and is no longer available for download. Immediately disabling everything included by this project is strongly recommended!'), |
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281 ); |
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282 break; |
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283 case 'unpublished': |
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284 case 'revoked': |
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285 $projects[$project]['status'] = UPDATE_REVOKED; |
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286 if (empty($projects[$project]['extra'])) { |
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287 $projects[$project]['extra'] = array(); |
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288 } |
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289 $projects[$project]['extra'][] = array( |
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290 'class' => 'project-revoked', |
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291 'label' => t('Project revoked'), |
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292 'data' => t('This project has been revoked, and is no longer available for download. Disabling everything included by this project is strongly recommended!'), |
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293 ); |
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294 break; |
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295 case 'unsupported': |
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296 $projects[$project]['status'] = UPDATE_NOT_SUPPORTED; |
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297 if (empty($projects[$project]['extra'])) { |
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298 $projects[$project]['extra'] = array(); |
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299 } |
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300 $projects[$project]['extra'][] = array( |
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301 'class' => 'project-not-supported', |
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302 'label' => t('Project not supported'), |
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303 'data' => t('This project is no longer supported, and is no longer available for download. Disabling everything included by this project is strongly recommended!'), |
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304 ); |
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305 break; |
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306 case 'not-fetched': |
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307 $projects[$project]['status'] = UPDATE_NOT_FETCHED; |
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308 $projects[$project]['reason'] = t('Failed to fetch available update data'); |
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309 break; |
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310 |
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311 default: |
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312 // Assume anything else (e.g. 'published') is valid and we should |
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313 // perform the rest of the logic in this function. |
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314 break; |
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315 } |
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316 } |
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317 |
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318 if (!empty($projects[$project]['status'])) { |
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319 // We already know the status for this project, so there's nothing |
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320 // else to compute. Just record everything else we fetched from the |
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321 // XML file into our projects array and move to the next project. |
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322 $projects[$project] += $available[$project]; |
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323 continue; |
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324 } |
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325 |
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326 // Figure out the target major version. |
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327 $existing_major = $project_info['existing_major']; |
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328 $supported_majors = array(); |
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329 if (isset($available[$project]['supported_majors'])) { |
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330 $supported_majors = explode(',', $available[$project]['supported_majors']); |
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331 } |
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332 elseif (isset($available[$project]['default_major'])) { |
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333 // Older release history XML file without supported or recommended. |
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334 $supported_majors[] = $available[$project]['default_major']; |
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335 } |
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336 |
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337 if (in_array($existing_major, $supported_majors)) { |
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338 // Still supported, stay at the current major version. |
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339 $target_major = $existing_major; |
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340 } |
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341 elseif (isset($available[$project]['recommended_major'])) { |
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342 // Since 'recommended_major' is defined, we know this is the new XML |
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343 // format. Therefore, we know the current release is unsupported since |
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344 // its major version was not in the 'supported_majors' list. We should |
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345 // find the best release from the recommended major version. |
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346 $target_major = $available[$project]['recommended_major']; |
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347 $projects[$project]['status'] = UPDATE_NOT_SUPPORTED; |
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348 } |
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349 elseif (isset($available[$project]['default_major'])) { |
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350 // Older release history XML file without recommended, so recommend |
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351 // the currently defined "default_major" version. |
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352 $target_major = $available[$project]['default_major']; |
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353 } |
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354 else { |
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355 // Malformed XML file? Stick with the current version. |
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356 $target_major = $existing_major; |
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357 } |
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358 |
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359 // Make sure we never tell the admin to downgrade. If we recommended an |
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360 // earlier version than the one they're running, they'd face an |
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361 // impossible data migration problem, since Drupal never supports a DB |
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362 // downgrade path. In the unfortunate case that what they're running is |
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363 // unsupported, and there's nothing newer for them to upgrade to, we |
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364 // can't print out a "Recommended version", but just have to tell them |
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365 // what they have is unsupported and let them figure it out. |
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366 $target_major = max($existing_major, $target_major); |
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367 |
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368 $version_patch_changed = ''; |
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369 $patch = ''; |
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370 |
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371 // Defend ourselves from XML history files that contain no releases. |
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372 if (empty($available[$project]['releases'])) { |
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373 $projects[$project]['status'] = UPDATE_UNKNOWN; |
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374 $projects[$project]['reason'] = t('No available releases found'); |
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375 continue; |
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376 } |
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377 foreach ($available[$project]['releases'] as $version => $release) { |
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378 // First, if this is the existing release, check a few conditions. |
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379 if ($projects[$project]['existing_version'] === $version) { |
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380 if (isset($release['terms']['Release type']) && |
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381 in_array('Insecure', $release['terms']['Release type'])) { |
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382 $projects[$project]['status'] = UPDATE_NOT_SECURE; |
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383 } |
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384 elseif ($release['status'] == 'unpublished') { |
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385 $projects[$project]['status'] = UPDATE_REVOKED; |
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386 if (empty($projects[$project]['extra'])) { |
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387 $projects[$project]['extra'] = array(); |
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388 } |
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389 $projects[$project]['extra'][] = array( |
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390 'class' => 'release-revoked', |
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391 'label' => t('Release revoked'), |
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392 'data' => t('Your currently installed release has been revoked, and is no longer available for download. Disabling everything included in this release or upgrading is strongly recommended!'), |
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393 ); |
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394 } |
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395 elseif (isset($release['terms']['Release type']) && |
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396 in_array('Unsupported', $release['terms']['Release type'])) { |
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397 $projects[$project]['status'] = UPDATE_NOT_SUPPORTED; |
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398 if (empty($projects[$project]['extra'])) { |
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399 $projects[$project]['extra'] = array(); |
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400 } |
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401 $projects[$project]['extra'][] = array( |
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402 'class' => 'release-not-supported', |
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403 'label' => t('Release not supported'), |
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404 'data' => t('Your currently installed release is now unsupported, and is no longer available for download. Disabling everything included in this release or upgrading is strongly recommended!'), |
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405 ); |
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406 } |
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407 } |
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408 |
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409 // Otherwise, ignore unpublished, insecure, or unsupported releases. |
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410 if ($release['status'] == 'unpublished' || |
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411 (isset($release['terms']['Release type']) && |
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412 (in_array('Insecure', $release['terms']['Release type']) || |
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413 in_array('Unsupported', $release['terms']['Release type'])))) { |
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414 continue; |
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415 } |
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416 |
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417 // See if this is a higher major version than our target and yet still |
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418 // supported. If so, record it as an "Also available" release. |
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419 if ($release['version_major'] > $target_major) { |
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420 if (in_array($release['version_major'], $supported_majors)) { |
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421 if (!isset($available[$project]['also'])) { |
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422 $available[$project]['also'] = array(); |
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423 } |
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424 if (!isset($available[$project]['also'][$release['version_major']])) { |
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425 $available[$project]['also'][$release['version_major']] = $version; |
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426 } |
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427 } |
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428 // Otherwise, this release can't matter to us, since it's neither |
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429 // from the release series we're currently using nor the recommended |
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430 // release. We don't even care about security updates for this |
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431 // branch, since if a project maintainer puts out a security release |
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432 // at a higher major version and not at the lower major version, |
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433 // they must remove the lower version from the supported major |
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434 // versions at the same time, in which case we won't hit this code. |
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435 continue; |
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436 } |
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437 |
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438 // Look for the 'latest version' if we haven't found it yet. Latest is |
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439 // defined as the most recent version for the target major version. |
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440 if (!isset($available[$project]['latest_version']) |
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441 && $release['version_major'] == $target_major) { |
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442 $available[$project]['latest_version'] = $version; |
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443 } |
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444 |
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445 // Look for the development snapshot release for this branch. |
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446 if (!isset($available[$project]['dev_version']) |
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447 && $release['version_major'] == $target_major |
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448 && isset($release['version_extra']) |
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449 && $release['version_extra'] == 'dev') { |
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450 $available[$project]['dev_version'] = $version; |
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451 } |
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452 |
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453 // Look for the 'recommended' version if we haven't found it yet (see |
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454 // phpdoc at the top of this function for the definition). |
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455 if (!isset($available[$project]['recommended']) |
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456 && $release['version_major'] == $target_major |
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457 && isset($release['version_patch'])) { |
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458 if ($patch != $release['version_patch']) { |
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459 $patch = $release['version_patch']; |
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460 $version_patch_changed = $release['version']; |
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461 } |
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462 if (empty($release['version_extra']) && $patch == $release['version_patch']) { |
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463 $available[$project]['recommended'] = $version_patch_changed; |
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464 } |
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465 } |
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466 |
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467 // Stop searching once we hit the currently installed version. |
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468 if ($projects[$project]['existing_version'] === $version) { |
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469 break; |
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470 } |
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471 |
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472 // If we're running a dev snapshot and have a timestamp, stop |
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473 // searching for security updates once we hit an official release |
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474 // older than what we've got. Allow 100 seconds of leeway to handle |
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475 // differences between the datestamp in the .info file and the |
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476 // timestamp of the tarball itself (which are usually off by 1 or 2 |
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477 // seconds) so that we don't flag that as a new release. |
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478 if ($projects[$project]['install_type'] == 'dev') { |
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479 if (empty($projects[$project]['datestamp'])) { |
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480 // We don't have current timestamp info, so we can't know. |
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481 continue; |
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482 } |
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483 elseif (isset($release['date']) && ($projects[$project]['datestamp'] + 100 > $release['date'])) { |
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484 // We're newer than this, so we can skip it. |
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485 continue; |
|
486 } |
|
487 } |
|
488 |
|
489 // See if this release is a security update. |
|
490 if (isset($release['terms']['Release type']) |
|
491 && in_array('Security update', $release['terms']['Release type'])) { |
|
492 $projects[$project]['security updates'][] = $release; |
|
493 } |
|
494 } |
|
495 |
|
496 // If we were unable to find a recommended version, then make the latest |
|
497 // version the recommended version if possible. |
|
498 if (!isset($available[$project]['recommended']) && isset($available[$project]['latest_version'])) { |
|
499 $available[$project]['recommended'] = $available[$project]['latest_version']; |
|
500 } |
|
501 |
|
502 // Stash the info about available releases into our $projects array. |
|
503 $projects[$project] += $available[$project]; |
|
504 |
|
505 // |
|
506 // Check to see if we need an update or not. |
|
507 // |
|
508 |
|
509 if (!empty($projects[$project]['security updates'])) { |
|
510 // If we found security updates, that always trumps any other status. |
|
511 $projects[$project]['status'] = UPDATE_NOT_SECURE; |
|
512 } |
|
513 |
|
514 if (isset($projects[$project]['status'])) { |
|
515 // If we already know the status, we're done. |
|
516 continue; |
|
517 } |
|
518 |
|
519 // If we don't know what to recommend, there's nothing we can report. |
|
520 // Bail out early. |
|
521 if (!isset($projects[$project]['recommended'])) { |
|
522 $projects[$project]['status'] = UPDATE_UNKNOWN; |
|
523 $projects[$project]['reason'] = t('No available releases found'); |
|
524 continue; |
|
525 } |
|
526 |
|
527 // If we're running a dev snapshot, compare the date of the dev snapshot |
|
528 // with the latest official version, and record the absolute latest in |
|
529 // 'latest_dev' so we can correctly decide if there's a newer release |
|
530 // than our current snapshot. |
|
531 if ($projects[$project]['install_type'] == 'dev') { |
|
532 if (isset($available[$project]['dev_version']) && $available[$project]['releases'][$available[$project]['dev_version']]['date'] > $available[$project]['releases'][$available[$project]['latest_version']]['date']) { |
|
533 $projects[$project]['latest_dev'] = $available[$project]['dev_version']; |
|
534 } |
|
535 else { |
|
536 $projects[$project]['latest_dev'] = $available[$project]['latest_version']; |
|
537 } |
|
538 } |
|
539 |
|
540 // Figure out the status, based on what we've seen and the install type. |
|
541 switch ($projects[$project]['install_type']) { |
|
542 case 'official': |
|
543 if ($projects[$project]['existing_version'] === $projects[$project]['recommended'] || $projects[$project]['existing_version'] === $projects[$project]['latest_version']) { |
|
544 $projects[$project]['status'] = UPDATE_CURRENT; |
|
545 } |
|
546 else { |
|
547 $projects[$project]['status'] = UPDATE_NOT_CURRENT; |
|
548 } |
|
549 break; |
|
550 |
|
551 case 'dev': |
|
552 $latest = $available[$project]['releases'][$projects[$project]['latest_dev']]; |
|
553 if (empty($projects[$project]['datestamp'])) { |
|
554 $projects[$project]['status'] = UPDATE_NOT_CHECKED; |
|
555 $projects[$project]['reason'] = t('Unknown release date'); |
|
556 } |
|
557 elseif (($projects[$project]['datestamp'] + 100 > $latest['date'])) { |
|
558 $projects[$project]['status'] = UPDATE_CURRENT; |
|
559 } |
|
560 else { |
|
561 $projects[$project]['status'] = UPDATE_NOT_CURRENT; |
|
562 } |
|
563 break; |
|
564 |
|
565 default: |
|
566 $projects[$project]['status'] = UPDATE_UNKNOWN; |
|
567 $projects[$project]['reason'] = t('Invalid info'); |
|
568 } |
|
569 } |
|
570 else { |
|
571 $projects[$project]['status'] = UPDATE_UNKNOWN; |
|
572 $projects[$project]['reason'] = t('No available releases found'); |
|
573 } |
|
574 } |
|
575 // Give other modules a chance to alter the status (for example, to allow a |
|
576 // contrib module to provide fine-grained settings to ignore specific |
|
577 // projects or releases). |
|
578 drupal_alter('update_status', $projects); |
|
579 |
|
580 // Cache the site's update status for at most 1 hour. |
|
581 _update_cache_set('update_project_data', $projects, time() + 3600); |
|
582 return $projects; |
|
583 } |
|
584 |
|
585 /** |
|
586 * Retrieve data from {cache_update} or empty the cache when necessary. |
|
587 * |
|
588 * Two very expensive arrays computed by this module are the list of all |
|
589 * installed modules and themes (and .info data, project associations, etc), |
|
590 * and the current status of the site relative to the currently available |
|
591 * releases. These two arrays are cached in the {cache_update} table and used |
|
592 * whenever possible. The cache is cleared whenever the administrator visits |
|
593 * the status report, available updates report, or the module or theme |
|
594 * administration pages, since we should always recompute the most current |
|
595 * values on any of those pages. |
|
596 * |
|
597 * Note: while both of these arrays are expensive to compute (in terms of disk |
|
598 * I/O and some fairly heavy CPU processing), neither of these is the actual |
|
599 * data about available updates that we have to fetch over the network from |
|
600 * updates.drupal.org. That information is stored with the |
|
601 * 'update_available_releases' cache ID -- it needs to persist longer than 1 |
|
602 * hour and never get invalidated just by visiting a page on the site. |
|
603 * |
|
604 * @param $cid |
|
605 * The cache id of data to return from the cache. Valid options are |
|
606 * 'update_project_data' and 'update_project_projects'. |
|
607 * |
|
608 * @return |
|
609 * The cached value of the $projects array generated by |
|
610 * update_calculate_project_data() or update_get_projects(), or an empty |
|
611 * array when the cache is cleared. |
|
612 */ |
|
613 function update_project_cache($cid) { |
|
614 $projects = array(); |
|
615 |
|
616 // On certain paths, we should clear the cache and recompute the projects or |
|
617 // update status of the site to avoid presenting stale information. |
|
618 $q = $_GET['q']; |
|
619 $paths = array('admin/build/modules', 'admin/build/themes', 'admin/reports', 'admin/reports/updates', 'admin/reports/status', 'admin/reports/updates/check'); |
|
620 if (in_array($q, $paths)) { |
|
621 _update_cache_clear($cid); |
|
622 } |
|
623 else { |
|
624 $cache = _update_cache_get($cid); |
|
625 if (!empty($cache->data) && $cache->expire > time()) { |
|
626 $projects = $cache->data; |
|
627 } |
|
628 } |
|
629 return $projects; |
|
630 } |