Initial Drupal 11 with DDEV setup
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								web/core/lib/Drupal/Component/Graph/Graph.php
									
									
									
									
									
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<?php
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namespace Drupal\Component\Graph;
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/**
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 * Directed acyclic graph manipulation.
 | 
			
		||||
 *
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 * This class represents a directed acyclic graph (DAG) and provides methods
 | 
			
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 * for processing and sorting it.
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 *
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 * Example of a graph structure:
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 * @code
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 *   1────►2────►3
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 *         │     │
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 *         │     ▼
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 *         └───► 4
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 * @endcode
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 *
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 * Example of defining a graph in PHP:
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 * @code
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 *   $graph[1]['edges'][2] = 1;
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 *   $graph[2]['edges'][3] = 1;
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 *   $graph[2]['edges'][4] = 1;
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 *   $graph[3]['edges'][4] = 1;
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 * @endcode
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 */
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class Graph {
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  /**
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   * Holds the directed acyclic graph.
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   *
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   * @var array
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   */
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  protected $graph;
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  /**
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   * Instantiates the directed acyclic graph object.
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   *
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   * @param array $graph
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   *   A three-dimensional associative array, with the first keys being the
 | 
			
		||||
   *   names of the vertices, which can be strings or numbers. The second key is
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		||||
   *   'edges', whose value is an array keyed by the names of the vertices
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   *   connected to it; the values in this array can be simply TRUE or may
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		||||
   *   contain other data.
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   */
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  public function __construct($graph) {
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    $this->graph = $graph;
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  }
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		||||
  /**
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   * Performs a depth-first search and sort on the directed acyclic graph.
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		||||
   *
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   * @return array
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   *   The given $graph with more secondary keys filled in:
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   *   - 'paths': Contains a list of vertices than can be reached on a path from
 | 
			
		||||
   *     this vertex.
 | 
			
		||||
   *   - 'reverse_paths': Contains a list of vertices that has a path from them
 | 
			
		||||
   *     to this vertex.
 | 
			
		||||
   *   - 'weight': If there is a path from a vertex to another then the weight
 | 
			
		||||
   *      of the latter is higher.
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   *   - 'component': Vertices in the same component have the same component
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		||||
   *     identifier.
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		||||
   */
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  public function searchAndSort() {
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    $state = [
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      // The order of last visit of the depth first search. This is the reverse
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      // of the topological order if the graph is acyclic.
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      'last_visit_order' => [],
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		||||
      // The components of the graph.
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		||||
      'components' => [],
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		||||
    ];
 | 
			
		||||
    // Perform the actual search.
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		||||
    foreach ($this->graph as $start => $data) {
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      $this->depthFirstSearch($state, $start);
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		||||
    }
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		||||
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		||||
    // We do such a numbering that every component starts with 0. This is useful
 | 
			
		||||
    // for module installs as we can install every 0 weighted module in one
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		||||
    // request, and then every 1 weighted etc.
 | 
			
		||||
    $component_weights = [];
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		||||
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		||||
    foreach ($state['last_visit_order'] as $vertex) {
 | 
			
		||||
      $component = $this->graph[$vertex]['component'];
 | 
			
		||||
      if (!isset($component_weights[$component])) {
 | 
			
		||||
        $component_weights[$component] = 0;
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		||||
      }
 | 
			
		||||
      $this->graph[$vertex]['weight'] = $component_weights[$component]--;
 | 
			
		||||
    }
 | 
			
		||||
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		||||
    return $this->graph;
 | 
			
		||||
  }
 | 
			
		||||
 | 
			
		||||
  /**
 | 
			
		||||
   * Performs a depth-first search on a graph.
 | 
			
		||||
   *
 | 
			
		||||
   * @param array $state
 | 
			
		||||
   *   An associative array. The key 'last_visit_order' stores a list of the
 | 
			
		||||
   *   vertices visited. The key components stores list of vertices belonging
 | 
			
		||||
   *   to the same the component.
 | 
			
		||||
   * @param string|int $start
 | 
			
		||||
   *   An arbitrary vertex where we started traversing the graph.
 | 
			
		||||
   * @param string|int|null $component
 | 
			
		||||
   *   The component of the last vertex.
 | 
			
		||||
   *
 | 
			
		||||
   * @see \Drupal\Component\Graph\Graph::searchAndSort()
 | 
			
		||||
   */
 | 
			
		||||
  protected function depthFirstSearch(&$state, $start, &$component = NULL) {
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		||||
    // Assign new component for each new vertex, i.e. when not called
 | 
			
		||||
    // recursively.
 | 
			
		||||
    if (!isset($component)) {
 | 
			
		||||
      $component = $start;
 | 
			
		||||
    }
 | 
			
		||||
    // Nothing to do, if we already visited this vertex.
 | 
			
		||||
    if (isset($this->graph[$start]['paths'])) {
 | 
			
		||||
      return;
 | 
			
		||||
    }
 | 
			
		||||
    // Mark $start as visited.
 | 
			
		||||
    $this->graph[$start]['paths'] = [];
 | 
			
		||||
 | 
			
		||||
    // Assign $start to the current component.
 | 
			
		||||
    $this->graph[$start]['component'] = $component;
 | 
			
		||||
    $state['components'][$component][] = $start;
 | 
			
		||||
 | 
			
		||||
    // Visit edges of $start.
 | 
			
		||||
    if (isset($this->graph[$start]['edges'])) {
 | 
			
		||||
      foreach ($this->graph[$start]['edges'] as $end => $v) {
 | 
			
		||||
        // Mark that $start can reach $end.
 | 
			
		||||
        $this->graph[$start]['paths'][$end] = $v;
 | 
			
		||||
 | 
			
		||||
        if (isset($this->graph[$end]['component']) && $component != $this->graph[$end]['component']) {
 | 
			
		||||
          // This vertex already has a component, use that from now on and
 | 
			
		||||
          // reassign all the previously explored vertices.
 | 
			
		||||
          $new_component = $this->graph[$end]['component'];
 | 
			
		||||
          foreach ($state['components'][$component] as $vertex) {
 | 
			
		||||
            $this->graph[$vertex]['component'] = $new_component;
 | 
			
		||||
            $state['components'][$new_component][] = $vertex;
 | 
			
		||||
          }
 | 
			
		||||
          unset($state['components'][$component]);
 | 
			
		||||
          $component = $new_component;
 | 
			
		||||
        }
 | 
			
		||||
        // Only visit existing vertices.
 | 
			
		||||
        if (isset($this->graph[$end])) {
 | 
			
		||||
          // Visit the connected vertex.
 | 
			
		||||
          $this->depthFirstSearch($state, $end, $component);
 | 
			
		||||
 | 
			
		||||
          // All vertices reachable by $end are also reachable by $start.
 | 
			
		||||
          $this->graph[$start]['paths'] += $this->graph[$end]['paths'];
 | 
			
		||||
        }
 | 
			
		||||
      }
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    // Now that any other subgraph has been explored, add $start to all reverse
 | 
			
		||||
    // paths.
 | 
			
		||||
    foreach ($this->graph[$start]['paths'] as $end => $v) {
 | 
			
		||||
      if (isset($this->graph[$end])) {
 | 
			
		||||
        $this->graph[$end]['reverse_paths'][$start] = $v;
 | 
			
		||||
      }
 | 
			
		||||
    }
 | 
			
		||||
 | 
			
		||||
    // Record the order of the last visit. This is the reverse of the
 | 
			
		||||
    // topological order if the graph is acyclic.
 | 
			
		||||
    $state['last_visit_order'][] = $start;
 | 
			
		||||
  }
 | 
			
		||||
 | 
			
		||||
}
 | 
			
		||||
							
								
								
									
										339
									
								
								web/core/lib/Drupal/Component/Graph/LICENSE.txt
									
									
									
									
									
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										339
									
								
								web/core/lib/Drupal/Component/Graph/LICENSE.txt
									
									
									
									
									
										Normal file
									
								
							@ -0,0 +1,339 @@
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		||||
        GNU GENERAL PUBLIC LICENSE
 | 
			
		||||
           Version 2, June 1991
 | 
			
		||||
 | 
			
		||||
 Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
 | 
			
		||||
 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 | 
			
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 Everyone is permitted to copy and distribute verbatim copies
 | 
			
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 of this license document, but changing it is not allowed.
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          Preamble
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  The licenses for most software are designed to take away your
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freedom to share and change it.  By contrast, the GNU General Public
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License is intended to guarantee your freedom to share and change free
 | 
			
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software--to make sure the software is free for all its users.  This
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		||||
General Public License applies to most of the Free Software
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		||||
Foundation's software and to any other program whose authors commit to
 | 
			
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using it.  (Some other Free Software Foundation software is covered by
 | 
			
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the GNU Lesser General Public License instead.)  You can apply it to
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your programs, too.
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  When we speak of free software, we are referring to freedom, not
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price.  Our General Public Licenses are designed to make sure that you
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have the freedom to distribute copies of free software (and charge for
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this service if you wish), that you receive source code or can get it
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if you want it, that you can change the software or use pieces of it
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in new free programs; and that you know you can do these things.
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  To protect your rights, we need to make restrictions that forbid
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anyone to deny you these rights or to ask you to surrender the rights.
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These restrictions translate to certain responsibilities for you if you
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distribute copies of the software, or if you modify it.
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  For example, if you distribute copies of such a program, whether
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  We protect your rights with two steps: (1) copyright the software, and
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(2) offer you this license which gives you legal permission to copy,
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  Also, for each author's protection and ours, we want to make certain
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        GNU GENERAL PUBLIC LICENSE
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   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
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  0. This License applies to any program or other work which contains
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Whether that is true depends on what the Program does.
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		||||
 | 
			
		||||
  6. Each time you redistribute the Program (or any work based on the
 | 
			
		||||
Program), the recipient automatically receives a license from the
 | 
			
		||||
original licensor to copy, distribute or modify the Program subject to
 | 
			
		||||
these terms and conditions.  You may not impose any further
 | 
			
		||||
restrictions on the recipients' exercise of the rights granted herein.
 | 
			
		||||
You are not responsible for enforcing compliance by third parties to
 | 
			
		||||
this License.
 | 
			
		||||
 | 
			
		||||
  7. If, as a consequence of a court judgment or allegation of patent
 | 
			
		||||
infringement or for any other reason (not limited to patent issues),
 | 
			
		||||
conditions are imposed on you (whether by court order, agreement or
 | 
			
		||||
otherwise) that contradict the conditions of this License, they do not
 | 
			
		||||
excuse you from the conditions of this License.  If you cannot
 | 
			
		||||
distribute so as to satisfy simultaneously your obligations under this
 | 
			
		||||
License and any other pertinent obligations, then as a consequence you
 | 
			
		||||
may not distribute the Program at all.  For example, if a patent
 | 
			
		||||
license would not permit royalty-free redistribution of the Program by
 | 
			
		||||
all those who receive copies directly or indirectly through you, then
 | 
			
		||||
the only way you could satisfy both it and this License would be to
 | 
			
		||||
refrain entirely from distribution of the Program.
 | 
			
		||||
 | 
			
		||||
If any portion of this section is held invalid or unenforceable under
 | 
			
		||||
any particular circumstance, the balance of the section is intended to
 | 
			
		||||
apply and the section as a whole is intended to apply in other
 | 
			
		||||
circumstances.
 | 
			
		||||
 | 
			
		||||
It is not the purpose of this section to induce you to infringe any
 | 
			
		||||
patents or other property right claims or to contest validity of any
 | 
			
		||||
such claims; this section has the sole purpose of protecting the
 | 
			
		||||
integrity of the free software distribution system, which is
 | 
			
		||||
implemented by public license practices.  Many people have made
 | 
			
		||||
generous contributions to the wide range of software distributed
 | 
			
		||||
through that system in reliance on consistent application of that
 | 
			
		||||
system; it is up to the author/donor to decide if he or she is willing
 | 
			
		||||
to distribute software through any other system and a licensee cannot
 | 
			
		||||
impose that choice.
 | 
			
		||||
 | 
			
		||||
This section is intended to make thoroughly clear what is believed to
 | 
			
		||||
be a consequence of the rest of this License.
 | 
			
		||||
 | 
			
		||||
  8. If the distribution and/or use of the Program is restricted in
 | 
			
		||||
certain countries either by patents or by copyrighted interfaces, the
 | 
			
		||||
original copyright holder who places the Program under this License
 | 
			
		||||
may add an explicit geographical distribution limitation excluding
 | 
			
		||||
those countries, so that distribution is permitted only in or among
 | 
			
		||||
countries not thus excluded.  In such case, this License incorporates
 | 
			
		||||
the limitation as if written in the body of this License.
 | 
			
		||||
 | 
			
		||||
  9. The Free Software Foundation may publish revised and/or new versions
 | 
			
		||||
of the General Public License from time to time.  Such new versions will
 | 
			
		||||
be similar in spirit to the present version, but may differ in detail to
 | 
			
		||||
address new problems or concerns.
 | 
			
		||||
 | 
			
		||||
Each version is given a distinguishing version number.  If the Program
 | 
			
		||||
specifies a version number of this License which applies to it and "any
 | 
			
		||||
later version", you have the option of following the terms and conditions
 | 
			
		||||
either of that version or of any later version published by the Free
 | 
			
		||||
Software Foundation.  If the Program does not specify a version number of
 | 
			
		||||
this License, you may choose any version ever published by the Free Software
 | 
			
		||||
Foundation.
 | 
			
		||||
 | 
			
		||||
  10. If you wish to incorporate parts of the Program into other free
 | 
			
		||||
programs whose distribution conditions are different, write to the author
 | 
			
		||||
to ask for permission.  For software which is copyrighted by the Free
 | 
			
		||||
Software Foundation, write to the Free Software Foundation; we sometimes
 | 
			
		||||
make exceptions for this.  Our decision will be guided by the two goals
 | 
			
		||||
of preserving the free status of all derivatives of our free software and
 | 
			
		||||
of promoting the sharing and reuse of software generally.
 | 
			
		||||
 | 
			
		||||
          NO WARRANTY
 | 
			
		||||
 | 
			
		||||
  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
 | 
			
		||||
FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
 | 
			
		||||
OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
 | 
			
		||||
PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
 | 
			
		||||
OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 | 
			
		||||
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
 | 
			
		||||
TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
 | 
			
		||||
PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
 | 
			
		||||
REPAIR OR CORRECTION.
 | 
			
		||||
 | 
			
		||||
  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
 | 
			
		||||
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
 | 
			
		||||
REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
 | 
			
		||||
INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
 | 
			
		||||
OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
 | 
			
		||||
TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
 | 
			
		||||
YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
 | 
			
		||||
PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
 | 
			
		||||
POSSIBILITY OF SUCH DAMAGES.
 | 
			
		||||
 | 
			
		||||
         END OF TERMS AND CONDITIONS
 | 
			
		||||
 | 
			
		||||
      How to Apply These Terms to Your New Programs
 | 
			
		||||
 | 
			
		||||
  If you develop a new program, and you want it to be of the greatest
 | 
			
		||||
possible use to the public, the best way to achieve this is to make it
 | 
			
		||||
free software which everyone can redistribute and change under these terms.
 | 
			
		||||
 | 
			
		||||
  To do so, attach the following notices to the program.  It is safest
 | 
			
		||||
to attach them to the start of each source file to most effectively
 | 
			
		||||
convey the exclusion of warranty; and each file should have at least
 | 
			
		||||
the "copyright" line and a pointer to where the full notice is found.
 | 
			
		||||
 | 
			
		||||
    <one line to give the program's name and a brief idea of what it does.>
 | 
			
		||||
    Copyright (C) <year>  <name of author>
 | 
			
		||||
 | 
			
		||||
    This program is free software; you can redistribute it and/or modify
 | 
			
		||||
    it under the terms of the GNU General Public License as published by
 | 
			
		||||
    the Free Software Foundation; either version 2 of the License, or
 | 
			
		||||
    (at your option) any later version.
 | 
			
		||||
 | 
			
		||||
    This program is distributed in the hope that it will be useful,
 | 
			
		||||
    but WITHOUT ANY WARRANTY; without even the implied warranty of
 | 
			
		||||
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 | 
			
		||||
    GNU General Public License for more details.
 | 
			
		||||
 | 
			
		||||
    You should have received a copy of the GNU General Public License along
 | 
			
		||||
    with this program; if not, write to the Free Software Foundation, Inc.,
 | 
			
		||||
    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 | 
			
		||||
 | 
			
		||||
Also add information on how to contact you by electronic and paper mail.
 | 
			
		||||
 | 
			
		||||
If the program is interactive, make it output a short notice like this
 | 
			
		||||
when it starts in an interactive mode:
 | 
			
		||||
 | 
			
		||||
    Gnomovision version 69, Copyright (C) year name of author
 | 
			
		||||
    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
 | 
			
		||||
    This is free software, and you are welcome to redistribute it
 | 
			
		||||
    under certain conditions; type `show c' for details.
 | 
			
		||||
 | 
			
		||||
The hypothetical commands `show w' and `show c' should show the appropriate
 | 
			
		||||
parts of the General Public License.  Of course, the commands you use may
 | 
			
		||||
be called something other than `show w' and `show c'; they could even be
 | 
			
		||||
mouse-clicks or menu items--whatever suits your program.
 | 
			
		||||
 | 
			
		||||
You should also get your employer (if you work as a programmer) or your
 | 
			
		||||
school, if any, to sign a "copyright disclaimer" for the program, if
 | 
			
		||||
necessary.  Here is a sample; alter the names:
 | 
			
		||||
 | 
			
		||||
  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
 | 
			
		||||
  `Gnomovision' (which makes passes at compilers) written by James Hacker.
 | 
			
		||||
 | 
			
		||||
  <signature of Ty Coon>, 1 April 1989
 | 
			
		||||
  Ty Coon, President of Vice
 | 
			
		||||
 | 
			
		||||
This General Public License does not permit incorporating your program into
 | 
			
		||||
proprietary programs.  If your program is a subroutine library, you may
 | 
			
		||||
consider it more useful to permit linking proprietary applications with the
 | 
			
		||||
library.  If this is what you want to do, use the GNU Lesser General
 | 
			
		||||
Public License instead of this License.
 | 
			
		||||
							
								
								
									
										12
									
								
								web/core/lib/Drupal/Component/Graph/README.txt
									
									
									
									
									
										Normal file
									
								
							
							
						
						
									
										12
									
								
								web/core/lib/Drupal/Component/Graph/README.txt
									
									
									
									
									
										Normal file
									
								
							@ -0,0 +1,12 @@
 | 
			
		||||
The Drupal Graph Component
 | 
			
		||||
 | 
			
		||||
Thanks for using this Drupal component.
 | 
			
		||||
 | 
			
		||||
You can participate in its development on Drupal.org, through our issue system:
 | 
			
		||||
https://www.drupal.org/project/issues/drupal
 | 
			
		||||
 | 
			
		||||
You can get the full Drupal repo here:
 | 
			
		||||
https://www.drupal.org/project/drupal/git-instructions
 | 
			
		||||
 | 
			
		||||
You can browse the full Drupal repo here:
 | 
			
		||||
https://git.drupalcode.org/project/drupal
 | 
			
		||||
							
								
								
									
										18
									
								
								web/core/lib/Drupal/Component/Graph/TESTING.txt
									
									
									
									
									
										Normal file
									
								
							
							
						
						
									
										18
									
								
								web/core/lib/Drupal/Component/Graph/TESTING.txt
									
									
									
									
									
										Normal file
									
								
							@ -0,0 +1,18 @@
 | 
			
		||||
HOW-TO: Test this Drupal component
 | 
			
		||||
 | 
			
		||||
In order to test this component, you'll need to get the entire Drupal repo and
 | 
			
		||||
run the tests there.
 | 
			
		||||
 | 
			
		||||
You'll find the tests under core/tests/Drupal/Tests/Component.
 | 
			
		||||
 | 
			
		||||
You can get the full Drupal repo here:
 | 
			
		||||
https://www.drupal.org/project/drupal/git-instructions
 | 
			
		||||
 | 
			
		||||
You can find more information about running PHPUnit tests with Drupal here:
 | 
			
		||||
https://www.drupal.org/node/2116263
 | 
			
		||||
 | 
			
		||||
Each component in the Drupal\Component namespace has its own annotated test
 | 
			
		||||
group. You can use this group to run only the tests for this component. Like
 | 
			
		||||
this:
 | 
			
		||||
 | 
			
		||||
$ ./vendor/bin/phpunit -c core --group Graph
 | 
			
		||||
							
								
								
									
										22
									
								
								web/core/lib/Drupal/Component/Graph/composer.json
									
									
									
									
									
										Normal file
									
								
							
							
						
						
									
										22
									
								
								web/core/lib/Drupal/Component/Graph/composer.json
									
									
									
									
									
										Normal file
									
								
							@ -0,0 +1,22 @@
 | 
			
		||||
{
 | 
			
		||||
    "name": "drupal/core-graph",
 | 
			
		||||
    "description": "Graph.",
 | 
			
		||||
    "keywords": [
 | 
			
		||||
        "drupal"
 | 
			
		||||
    ],
 | 
			
		||||
    "homepage": "https://www.drupal.org/project/drupal",
 | 
			
		||||
    "license": "GPL-2.0-or-later",
 | 
			
		||||
    "require": {
 | 
			
		||||
        "php": ">=8.3.0"
 | 
			
		||||
    },
 | 
			
		||||
    "autoload": {
 | 
			
		||||
        "psr-4": {
 | 
			
		||||
            "Drupal\\Component\\Graph\\": ""
 | 
			
		||||
        }
 | 
			
		||||
    },
 | 
			
		||||
    "extra": {
 | 
			
		||||
        "_readme": [
 | 
			
		||||
            "This file was partially generated automatically. See: https://www.drupal.org/node/3293830"
 | 
			
		||||
        ]
 | 
			
		||||
    }
 | 
			
		||||
}
 | 
			
		||||
		Reference in New Issue
	
	Block a user