Put a Phage skeleton command on the Arcanist experimental branch

Summary:
Ref T2794. This doesn't do anything useful, but since I'm planning to start using this stuff to do real deployments I don't want to lose it if my laptop gets hit by a bus.

This just adds a skeletal `bin/phage` with enough code that I can add actual workflows to Phacility repositories and get `bin/phage remote --hosts ...` working without the code only existing on my laptop.

Test Plan: Ran `bin/phage`, saw nothin'.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T2794

Differential Revision: https://secure.phabricator.com/D17379

bin/phage

@@ -0,0 +1 @@
+../scripts/phage.php

scripts/phage.php

@@ -0,0 +1,29 @@
+#!/usr/bin/env php
+<?php
+
+require_once dirname(__FILE__).'/__init_script__.php';
+ini_set('memory_limit', -1);
+
+$args = new PhutilArgumentParser($argv);
+$args->parseStandardArguments();
+
+$args->parsePartial(array());
+
+
+// TODO: This is pretty minimal and should be shared with "arc".
+$working_directory = getcwd();
+$working_copy = ArcanistWorkingCopyIdentity::newFromPath($working_directory);
+$config = id(new ArcanistConfigurationManager())
+  ->setWorkingCopyIdentity($working_copy);
+
+foreach ($config->getProjectConfig('load') as $load) {
+  $load = Filesystem::resolvePath($working_copy->getProjectRoot().'/'.$load);
+  phutil_load_library($load);
+}
+
+
+$workflows = id(new PhutilClassMapQuery())
+  ->setAncestorClass('PhageWorkflow')
+  ->execute();
+$workflows[] = new PhutilHelpArgumentWorkflow();
+$args->parseWorkflows($workflows);

src/__phutil_library_map__.php

@@ -437,6 +437,7 @@ phutil_register_library_map(array(
     'ArcanistXUnitTestResultParser' => 'unit/parser/ArcanistXUnitTestResultParser.php',
     'CSharpToolsTestEngine' => 'unit/engine/CSharpToolsTestEngine.php',
     'NoseTestEngine' => 'unit/engine/NoseTestEngine.php',
+    'PhageWorkflow' => 'phage/workflow/PhageWorkflow.php',
     'PhpunitTestEngine' => 'unit/engine/PhpunitTestEngine.php',
     'PhpunitTestEngineTestCase' => 'unit/engine/__tests__/PhpunitTestEngineTestCase.php',
     'PhutilTestCase' => 'unit/engine/phutil/PhutilTestCase.php',
@@ -879,6 +880,7 @@ phutil_register_library_map(array(
     'ArcanistXUnitTestResultParser' => 'Phobject',
     'CSharpToolsTestEngine' => 'XUnitTestEngine',
     'NoseTestEngine' => 'ArcanistUnitTestEngine',
+    'PhageWorkflow' => 'PhutilArgumentWorkflow',
     'PhpunitTestEngine' => 'ArcanistUnitTestEngine',
     'PhpunitTestEngineTestCase' => 'PhutilTestCase',
     'PhutilTestCase' => 'Phobject',

src/phage/workflow/PhageWorkflow.php

@@ -0,0 +1,10 @@
+<?php
+
+abstract class PhageWorkflow
+  extends PhutilArgumentWorkflow {
+
+  public function isExecutable() {
+    return true;
+  }
+
+}