Tailor CLI feedback about "arc alias" to describe shell command aliases

Summary:
Fixes T9873. Instead of printing something like this:

> Aliased "arc ls" to "arc !ls".

...print this:

> Aliased "arc ls" to shell command "ls".

Test Plan:
  - Added shell commands and internal aliases.
  - Removed aliases.
  - Listed aliases.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T9873

Differential Revision: https://secure.phabricator.com/D14651

src/workflow/ArcanistAliasWorkflow.php

@@ -83,54 +83,42 @@ EOTEXT
 
     $argv = $this->getArgument('argv');
     if (count($argv) == 0) {
-      if ($aliases) {
-        foreach ($aliases as $alias => $binding) {
-          echo phutil_console_format(
-            "**%s** %s\n",
-            $alias,
-            implode(' ' , $binding));
-        }
-      } else {
-        echo pht("You haven't defined any aliases yet.")."\n";
-      }
+      $this->printAliases($aliases);
     } else if (count($argv) == 1) {
-      if (empty($aliases[$argv[0]])) {
-        echo pht("No alias '%s' to remove.", $argv[0])."\n";
-      } else {
-        echo pht(
-          "'%s' is currently aliased to '%s'.",
-          phutil_console_format('**arc %s**', $argv[0]),
-          phutil_console_format(
-            '**arc %s**',
-            implode(' ', $aliases[$argv[0]])));
-        $ok = phutil_console_confirm(pht('Delete this alias?'));
-        if ($ok) {
-          $was = implode(' ', $aliases[$argv[0]]);
-          unset($aliases[$argv[0]]);
-          $this->writeAliases($aliases);
-          echo pht("Unaliased '%s' (was '%s').", $argv[0], $was)."\n";
-        } else {
-          throw new ArcanistUserAbortException();
-        }
-      }
+      $this->removeAlias($aliases, $argv[0]);
     } else {
       $arc_config = $this->getArcanistConfiguration();
+      $alias = $argv[0];
 
-      if ($arc_config->buildWorkflow($argv[0])) {
+      if ($arc_config->buildWorkflow($alias)) {
         throw new ArcanistUsageException(
           pht(
-            "You can not create an alias for '%s' because it is a ".
-            "builtin command. '%s' can only create new commands.",
-            $argv[0],
+            'You can not create an alias for "%s" because it is a '.
+            'builtin command. "%s" can only create new commands.',
+            "arc {$alias}",
             'arc alias'));
       }
 
-      $aliases[$argv[0]] = array_slice($argv, 1);
-      echo pht(
-        "Aliased '%s' to '%s'.\n",
-        phutil_console_format('**arc %s**', $argv[0]),
-        phutil_console_format('**arc %s**', implode(' ', $aliases[$argv[0]])));
+      $new_alias = array_slice($argv, 1);
 
+      $command = implode(' ', $new_alias);
+      if (self::isShellCommandAlias($command)) {
+        echo tsprintf(
+          "%s\n",
+          pht(
+            'Aliased "%s" to shell command "%s".',
+            "arc {$alias}",
+            substr($command, 1)));
+      } else {
+        echo tsprintf(
+          "%s\n",
+          pht(
+            'Aliased "%s" to "%s".',
+            "arc {$alias}",
+            "arc {$command}"));
+      }
+
+      $aliases[$alias] = $new_alias;
       $this->writeAliases($aliases);
     }
 
@@ -173,4 +161,83 @@ EOTEXT
     return array($new_command, $argv);
   }
 
+  private function printAliases(array $aliases) {
+    if (!$aliases) {
+      echo tsprintf(
+        "%s\n",
+        pht('You have not defined any aliases yet.'));
+      return;
+    }
+
+    $table = id(new PhutilConsoleTable())
+      ->addColumn('input', array('title' => pht('Alias')))
+      ->addColumn('command', array('title' => pht('Command')))
+      ->addColumn('type', array('title' => pht('Type')));
+
+    ksort($aliases);
+
+    foreach ($aliases as $alias => $binding) {
+      $command = implode(' ', $binding);
+      if (self::isShellCommandAlias($command)) {
+        $command = substr($command, 1);
+        $type = pht('Shell Command');
+      } else {
+        $command = "arc {$command}";
+        $type = pht('Arcanist Command');
+      }
+
+      $row = array(
+        'input' => "arc {$alias}",
+        'type' => $type,
+        'command' => $command,
+      );
+
+      $table->addRow($row);
+    }
+
+    $table->draw();
+  }
+
+  private function removeAlias(array $aliases, $alias) {
+    if (empty($aliases[$alias])) {
+      echo tsprintf(
+        "%s\n",
+        pht('No alias "%s" to remove.', $alias));
+      return;
+    }
+
+    $command = implode(' ', $aliases[$alias]);
+
+    if (self::isShellCommandAlias($command)) {
+      echo tsprintf(
+        "%s\n",
+        pht(
+          '"%s" is currently aliased to shell command "%s".',
+          "arc {$alias}",
+          substr($command, 1)));
+    } else {
+      echo tsprintf(
+        "%s\n",
+        pht(
+          '"%s" is currently aliased to "%s".',
+          "arc {$alias}",
+          "arc {$command}"));
+    }
+
+
+    $ok = phutil_console_confirm(pht('Delete this alias?'));
+    if (!$ok) {
+      throw new ArcanistUserAbortException();
+    }
+
+    unset($aliases[$alias]);
+    $this->writeAliases($aliases);
+
+    echo tsprintf(
+      "%s\n",
+      pht(
+        'Removed alias "%s".',
+        "arc {$alias}"));
+  }
+
 }