Fill out some more info functions for libphutil-specific linters

Summary: Ref T2039. It looks like "phutil-library" didn't make it over, I'll add that to the other two (unless I'm wrong and this isn't an oversight?).

Test Plan: Used `arc linters` to read help.

Reviewers: btrahan, joshuaspence

Reviewed By: joshuaspence

Subscribers: epriestley

Maniphest Tasks: T2039

Differential Revision: https://secure.phabricator.com/D9070

.arclint

@@ -20,6 +20,10 @@
       "type": "phutil-xhpast",
       "include": "(\\.php$)"
     },
+    "phutil-library": {
+      "type": "phutil-library",
+      "include": "(\\.php$)"
+    },
     "text": {
       "type": "text"
     },

src/lint/linter/ArcanistPhutilLibraryLinter.php

@@ -7,8 +7,6 @@
  *   # If you define a symbol, it must not duplicate another definition.
  *   # If you define a class or interface in a file, it MUST be the only symbol
  *     defined in that file.
- *
- * @group linter
  */
 final class ArcanistPhutilLibraryLinter extends ArcanistLinter {
 
@@ -16,6 +14,20 @@ final class ArcanistPhutilLibraryLinter extends ArcanistLinter {
   const LINT_DUPLICATE_SYMBOL             = 2;
   const LINT_ONE_CLASS_PER_FILE           = 3;
 
+  public function getInfoName() {
+    return 'Phutil Library Linter';
+  }
+
+  public function getInfoDescription() {
+    return pht(
+      'Make sure all the symbols use in a libphutil library are defined and '.
+      'known. This linter is specific to PHP source in libphutil libraries.');
+  }
+
+  public function getLinterConfigurationName() {
+    return 'phutil-library';
+  }
+
   public function getLintNameMap() {
     return array(
       self::LINT_UNKNOWN_SYMBOL         => 'Unknown Symbol',

src/lint/linter/ArcanistPhutilXHPASTLinter.php

@@ -10,6 +10,16 @@ final class ArcanistPhutilXHPASTLinter extends ArcanistBaseXHPASTLinter {
   private $dynamicStringFunctions = array();
   private $dynamicStringClasses = array();
 
+  public function getInfoName() {
+    return 'XHPAST/libphutil Lint';
+  }
+
+  public function getInfoDescription() {
+    return pht(
+      'Use XHPAST to run libphutil-specific rules on a PHP library. This '.
+      'linter is intended for use in Phabricator libraries and extensions.');
+  }
+
   public function setDeprecatedFunctions($map) {
     $this->deprecatedFunctions = $map;
     return $this;

src/lint/linter/ArcanistXHPASTLinter.php

@@ -47,6 +47,18 @@ final class ArcanistXHPASTLinter extends ArcanistBaseXHPASTLinter {
   private $naminghook;
   private $switchhook;
 
+  public function getInfoName() {
+    return 'XHPAST Lint';
+  }
+
+  public function getInfoDescription() {
+    return pht(
+      'Use XHPAST to enforce Phabricator coding conventions on PHP source '.
+      'files. This linter is intended for use in Phabricator libraries and '.
+      'extensions, and enforces some Phabricator-specific style rules. It '.
+      'may not work well for general PHP source.');
+  }
+
   public function getLintNameMap() {
     return array(
       self::LINT_PHP_SYNTAX_ERROR          => 'PHP Syntax Error!',