Initial commit

Author: stecman

.gitignore

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+/vendor

README.md

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+# BASH auto complete plugin for Composer
+
+This is an experimental hack to add [Symfony BASH auto complete](https://github.com/stecman/symfony-console-completion) to Composer via a plugin. It's a pretty slimy hack, but it works without editing Composer's code.
+
+![Composer BASH completion](https://i.imgur.com/MoDWkby.gif)
+
+## Installation
+
+1. Run `composer g require stecman/composer-bash-complete-plugin`
+2. Put the following in your bash profile:
+
+    ```bash
+    # Modified version of what `composer _completion -g -p composer` generates
+    # Composer will only load plugins when a valid composer.json is in its working directory,
+    # so  for this hack to work, we are always running the completion command in ~/.composer
+    function _composercomplete {
+        export COMP_LINE COMP_POINT COMP_WORDBREAKS;
+
+        RESULT=`cd $HOME/.composer && composer _completion`;
+        STATUS=$?;
+
+        if [ $STATUS -ne 0 ]; then
+            echo $RESULT;
+            return $?;
+        fi;
+
+        local cur;
+        _get_comp_words_by_ref -n : cur;
+
+        COMPREPLY=(`compgen -W "$RESULT" -- $cur`);
+
+        __ltrim_colon_completions "$cur";
+    };
+    complete -F _composercomplete composer;
+    ```
+
+3. Reload your bash profile (or open a new shell), and enjoy tab completion on Composer
+
+## Explanation
+
+This hacky plugin injects an additional command into the Composer application at runtime. It relies on the fact that when handling an uncaught exception, `Composer\Console\Application::renderException` is called, which in turn calls `getComposer` and causes Composer plugins to be loaded. When the plugin in this package is activated and the first command line argument is `_completion`, the plugin effectively reboots the application with the completion command added.

composer.json

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+{
+    "name": "stecman/composer-bash-completion-plugin",
+    "type": "composer-plugin",
+
+    "extra": {
+        "class": "\\Stecman\\Component\\Symfony\\Console\\BashCompletion\\BashCompletionPlugin"
+    },
+    
+    "require": {
+        "composer-plugin-api": "1.0.0",
+        "stecman/symfony-console-completion": "~0.3.0"
+    },
+
+    "autoload": {
+    	"psr-4": {
+    		"Stecman\\Component\\Symfony\\Console\\BashCompletion\\": "src"
+    	}
+    }
+}

src/BashCompletionPlugin.php

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+<?php
+
+namespace Stecman\Component\Symfony\Console\BashCompletion;
+
+use Composer\Composer;
+use Composer\IO\IOInterface;
+use Composer\Plugin\PluginInterface;
+use Stecman\Component\Symfony\Console\BashCompletion\CompletionCommand;
+use Symfony\Component\Console\Input\ArgvInput;
+
+class BashCompletionPlugin implements PluginInterface
+{
+    /**
+     * @var \Symfony\Component\Console\Input\ArgvInput
+     */
+    protected $input;
+
+    public function activate(Composer $composer, IOInterface $io)
+    {
+        global $application;
+        global $__bashCompletionInjected;
+
+        if ($this->getInput()->getFirstArgument() === '_completion' && !$__bashCompletionInjected) {
+            $__bashCompletionInjected = true;
+
+            $application->add(new CompletionCommand());
+            $application->run();
+            die();
+        }
+    }
+
+    /**
+     * @return ArgvInput
+     */
+    protected function getInput()
+    {
+        if (!$this->input) {
+            $this->input = new ArgvInput();
+        }
+
+        return $this->input;
+    }
+}