Support generating remote refs in Git

Summary: Ref T13546. Allow construction of remote refs in Git; previously they were only supported in Mercurial.

Test Plan: Ran "arc inspect remote(origin)" in Git, got a ref.

Maniphest Tasks: T13546

Differential Revision: https://secure.phabricator.com/D21375

src/__phutil_library_map__.php

@@ -218,6 +218,7 @@ phutil_register_library_map(array(
     'ArcanistGitRawCommit' => 'repository/raw/ArcanistGitRawCommit.php',
     'ArcanistGitRawCommitTestCase' => 'repository/raw/__tests__/ArcanistGitRawCommitTestCase.php',
     'ArcanistGitRepositoryMarkerQuery' => 'repository/marker/ArcanistGitRepositoryMarkerQuery.php',
+    'ArcanistGitRepositoryRemoteQuery' => 'repository/remote/ArcanistGitRepositoryRemoteQuery.php',
     'ArcanistGitUpstreamPath' => 'repository/api/ArcanistGitUpstreamPath.php',
     'ArcanistGitWorkEngine' => 'work/ArcanistGitWorkEngine.php',
     'ArcanistGitWorkingCopy' => 'workingcopy/ArcanistGitWorkingCopy.php',
@@ -1246,6 +1247,7 @@ phutil_register_library_map(array(
     'ArcanistGitRawCommit' => 'Phobject',
     'ArcanistGitRawCommitTestCase' => 'PhutilTestCase',
     'ArcanistGitRepositoryMarkerQuery' => 'ArcanistRepositoryMarkerQuery',
+    'ArcanistGitRepositoryRemoteQuery' => 'ArcanistRepositoryRemoteQuery',
     'ArcanistGitUpstreamPath' => 'Phobject',
     'ArcanistGitWorkEngine' => 'ArcanistWorkEngine',
     'ArcanistGitWorkingCopy' => 'ArcanistWorkingCopy',

src/repository/api/ArcanistGitAPI.php

@@ -1763,4 +1763,8 @@ final class ArcanistGitAPI extends ArcanistRepositoryAPI {
     return new ArcanistGitRepositoryMarkerQuery();
   }
 
+  protected function newRemoteRefQueryTemplate() {
+    return new ArcanistGitRepositoryRemoteQuery();
+  }
+
 }

src/repository/api/ArcanistMercurialAPI.php

@@ -1014,7 +1014,6 @@ final class ArcanistMercurialAPI extends ArcanistRepositoryAPI {
     return new ArcanistMercurialRepositoryRemoteQuery();
   }
 
-
   public function getMercurialExtensionArguments() {
     $path = phutil_get_library_root('arcanist');
     $path = dirname($path);

src/repository/remote/ArcanistGitRepositoryRemoteQuery.php

@@ -0,0 +1,63 @@
+<?php
+
+final class ArcanistGitRepositoryRemoteQuery
+  extends ArcanistRepositoryRemoteQuery {
+
+  protected function newRemoteRefs() {
+    $api = $this->getRepositoryAPI();
+
+    $future = $api->newFuture('remote --verbose');
+    list($lines) = $future->resolve();
+
+    $pattern =
+      '(^'.
+      '(?P<name>[^\t]+)'.
+      '\t'.
+      '(?P<uri>[^\s]+)'.
+      ' '.
+      '\((?P<mode>fetch|push)\)'.
+      '\z'.
+      ')';
+
+    $map = array();
+
+    $lines = phutil_split_lines($lines, false);
+    foreach ($lines as $line) {
+      $matches = null;
+      if (!preg_match($pattern, $line, $matches)) {
+        throw new Exception(
+          pht(
+            'Failed to match remote pattern against line "%s".',
+            $line));
+      }
+
+      $name = $matches['name'];
+      $uri = $matches['uri'];
+      $mode = $matches['mode'];
+
+      $map[$name][$mode] = $uri;
+    }
+
+    $refs = array();
+    foreach ($map as $name => $uris) {
+      $fetch_uri = idx($uris, 'fetch');
+      $push_uri = idx($uris, 'push');
+
+      $ref = id(new ArcanistRemoteRef())
+        ->setRemoteName($name);
+
+      if ($fetch_uri !== null) {
+        $ref->setFetchURI($fetch_uri);
+      }
+
+      if ($push_uri !== null) {
+        $ref->setPushURI($push_uri);
+      }
+
+      $refs[] = $ref;
+    }
+
+    return $refs;
+  }
+
+}