Fixes #3164: Introduce artwork:show command, et. al.

examples/Commands/ArtCommands.php

@@ -0,0 +1,183 @@
+<?php
+namespace Drush\Commands;
+
+use Consolidation\AnnotatedCommand\AnnotationData;
+use Consolidation\AnnotatedCommand\CommandData;
+use Consolidation\AnnotatedCommand\Events\CustomEventAwareInterface;
+use Consolidation\AnnotatedCommand\Events\CustomEventAwareTrait;
+use Consolidation\OutputFormatters\StructuredData\RowsOfFields;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Console\Style\SymfonyStyle;
+
+use Drush\Style\DrushStyle;
+use Drush\Utils\StringUtils;
+
+/**
+ * Run these commands using the --include option - e.g. `drush --include=/path/to/drush/examples art sandwich`
+ *
+ * For an example of a Drupal module implementing commands, see
+ * - http://cgit.drupalcode.org/devel/tree/devel_generate/src/Commands
+ * - http://cgit.drupalcode.org/devel/tree/devel_generate/drush.services.yml
+ *
+ * This file is a good example of the first of those bullets (a commandfile) but
+ * since it isn't part of a module, it does not implement drush.services.yml.
+ */
+
+class ArtCommands extends DrushCommands implements CustomEventAwareInterface
+{
+    use CustomEventAwareTrait;
+
+    /** @var string[] */
+    protected $arts;
+
+    /**
+     * Show a fabulous picture.
+     *
+     * @command artwork:show
+     * @aliases arts
+     * @param $art The name of the art to display
+     * @usage drush art sandwich
+     *   Show a marvelous picture of a sandwich with pickles.
+     */
+    public function art($art = '')
+    {
+        $data = $this->getArt();
+        $name = $data[$art]['name'];
+        $description = $data[$art]['description'];
+        $path = $data[$art]['path'];
+        $msg = dt('Okay. Here is {art}: {description}',
+          ['art' => $name, 'description' => $description]
+        );
+        $this->output()->writeln("\n" . $msg . "\n");
+        $this->printFile($path);
+    }
+
+    /**
+     * Show a table of information about available art.
+     *
+     * @command artwork:list
+     * @aliases artls
+     * @field-labels
+     *   name: Name
+     *   description: Description
+     *   path: Path
+     * @default-fields name,description
+     *
+     * @return \Consolidation\OutputFormatters\StructuredData\RowsOfFields
+     */
+    public function listArt($options = ['format' => 'table'])
+    {
+        $data = $this->getArt();
+        return new RowsOfFields($data);
+    }
+
+    /**
+     * Commandfiles may also add topics.  These will appear in
+     * the list of topics when `drush topic` is executed.
+     * To view the topic below, run `drush --include=/full/path/to/examples topic`
+     */
+
+    /**
+     * Ruminations on the true meaning and philosophy of sandwiches.
+     *
+     * @command artwork:explain
+     * @hidden
+     * @topic
+     */
+    public function ruminate()
+    {
+        self::printFile(__DIR__ . '/art-topic.md');
+    }
+
+    /**
+     * Return the available built-in art. Any Drush commandfile may provide
+     * more art by implementing a 'drush-art' on-event hook. This on-event
+     * hook is defined in the 'findArt' method beolw.
+     *
+     * @hook on-event drush-art
+     */
+    public function builtInArt()
+    {
+        return [
+            'drush' => [
+                'name' => 'Drush',
+                'description' => 'The Drush logo.',
+                'path' => __DIR__ . '/art/drush-nocolor.txt',
+            ],
+            'sandwich' => [
+                'name' => 'Sandwich',
+                'description' => 'A tasty meal with bread often consumed at lunchtime.',
+                'path' => __DIR__ . '/art/sandwich-nocolor.txt',
+            ],
+        ];
+    }
+
+    /**
+     * @hook interact artwork:show
+     */
+    public function interact(InputInterface $input, OutputInterface $output, AnnotationData $annotationData)
+    {
+        $io = new DrushStyle($input, $output);
+
+        // If the user did not specify any artwork, then prompt for one.
+        $art = $input->getArgument('art');
+        if (empty($art)) {
+            $data = $this->getArt();
+            $selections = $this->convertArtListToKeyValue($data);
+            $selection = $io->choice('Select art to display', $selections);
+            $input->setArgument('art', $selection);
+        }
+    }
+
+    /**
+     * @hook validate artwork:show
+     */
+    public function artValidate(CommandData $commandData)
+    {
+        $art = $commandData->input()->getArgument('art');
+        $data = $this->getArt();
+        if (!isset($data[$art])) {
+            throw new \Exception(dt('I do not have any art called "{name}".', ['name' => $art]));
+        }
+    }
+
+    /**
+     * Get a list of available artwork. Cache result for future fast access.
+     */
+    protected function getArt()
+    {
+        if (!isset($this->arts)) {
+            $this->arts = $this->findArt();
+        }
+        return $this->arts;
+    }
+
+    /**
+     * Use custom defined on-event hook 'drush-art' to find available artwork.
+     */
+    protected function findArt()
+    {
+        $arts = [];
+        $handlers = $this->getCustomEventHandlers('drush-art');
+        foreach ($handlers as $handler) {
+            $handlerResult = $handler();
+            $arts = array_merge($arts, $handlerResult);
+        }
+        return $arts;
+    }
+
+    /**
+     * Given a list of artwork, converte to a 'key' => 'Name: Description' array.
+     * @param array $data
+     * @return array
+     */
+    protected function convertArtListToKeyValue($data)
+    {
+        $result = [];
+        foreach ($data as $key => $item) {
+            $result[$key] = $item['name'] . ': ' . $item['description'];
+        }
+        return $result;
+    }
+}

examples/Commands/XkcdCommands.php

@@ -26,7 +26,7 @@ class XkcdCommands extends DrushCommands {
    *   Retrieve and display cartoon #123 in eog.
    * @usage drush xkcd random --image-viewer=firefox
    *   Retrieve and display a random cartoon in Firefox.
-   * @aliases @xkcd
+   * @aliases xkcd
    */
   public function fetch($search = NULL, $options = ['image-viewer' => 'open', 'google-custom-search-api-key' => 'AIzaSyDpE01VDNNT73s6CEeJRdSg5jukoG244ek']) {
     if (empty($search)) {

examples/Commands/art-topic.md

@@ -0,0 +1,6 @@
+I have discovered a truly marvelous proof that it is impossible to 
+separate a piece of art into two cubes, or four pieces of art into two
+fourth of a piece of art, or in general, any artwork larger than the 
+second into two like artistic expressions. 
+
+This text file is too narrow to contain it.

examples/Commands/art/drush-nocolor.txt

@@ -0,0 +1,73 @@
+
+                                      .`
+                                `++++++++++
+                             ,'',+++#####++
+                           ;;,,,,++#######+
+                           ',,,,,++#######+
+                           ',,,,,++#######+:
+                           ;,,,,:+########++
+                           :,,,,'+########++              .
+                          .,,,,,++########++       ,'''';+++.
+             ,'+++.       ;,,,,,++#########+     `',,,,,++#++:
+            ',++++++      ',,,,,++#########+;   :;,,,,;++###++;
+           ',+++##+++`    ';''++++#########+++++,,,,,+++#####++;
+          ',+++#####++'`'',;++++##############++++,,+++#######++.
+         ',;++#######+++,:+++'##################+++++##########++
+        ',,++#########'++++'#######################+###########++
+       ';'+++###########++####################################++
+       ':::++#################################################+;
+        ':::++###############################################++
+        ::::;++#############################################++
+         ':::+++############################################+'
+          ':::++###########################################++
+          `;:::++##########################################+`
+           ':::;++#########################################++
+            ''''++##########################################+:
+           ,,,,'+###########################################++
+           ',,.++############################################+,
+          `:,,;+#############################################++
+          ',,,++##############################################+
+          ',,,++##############################################++;.
+         :,,,'+###############################################+++++++++:
+       `;';,,++#####################################################++++'
+   .'';,,,,,+++########################################################++
+;';,,,,;++++++#########################################################++
+;,;++++++++#############################################################+
+,,,+++#################################################################++
+.,,++###################################################################+
+.,,++#################################################################@#+
+.:,++############################,` .##################################++
+`:,++##########################         ################   #######+++++++
+ ;,++########################:           .############      ###++++++.
+ ',++#######################;              ##########       ###+:
+  '++++#####################                :######         :##+
+   :++++++++++#############`                  ###:          .#++
+         ,+++++############                                 :#++
+          ',,;+############                                 ##+,
+           ;,,++###########                  `###,          ##+
+           '::++###########                 ######'         #++
+            ;:;+###########               ##########       ##+`
+            '::++###########            :###'   `####      #++
+            .':;+############         .####       ####    ###++
+            ',':++############;     ######  ##### #####.,#####+,
+           ',,,:'++####################### ######.###########@++
+           :,,,,,++#########################################@@@++
+          ',,,,,'+#########################################@@@@#+;
+         :,,,,,,++###################  `########+  #######@@@@@@++`
+         ',,,,,++#####################            #######@@@@@@@@++
+        ',,,,,'+#######################+       ;######+#@@@@@@@@@++
+         ',,,,++####################################+++++@@@@@@@++
+          ',,++####################################++;:'++#@@@@#+;
+           ''+###########+++#####################+++  '':+++@@#++
+            ++#########+++:++++###############++++      ,'+++#++
+            .++#######+++   ,++++++##########+++          `'+++
+             .++#####++:     ':;++++#########+;              .
+              `++###++       ;::::,++#######@+,
+                +++++         ::::,++#####@@#+
+                 ++'          ;:::,++##@@@@@#+
+                              '::::;+@@@@@@@++
+                              '::::,+#@@@@@@++
+                               ,'::,+#@@@@@@++
+                                 ':,++@@@@@@+;
+                                  ':++@##++++.
+