Fix trash.swift without arguments.

Library/Homebrew/cask/artifact/abstract_uninstall.rb

@@ -24,8 +24,6 @@ module Cask
         :rmdir,
       ].freeze
 
-      TRASH_SCRIPT = (HOMEBREW_LIBRARY_PATH/"cask/utils/trash.swift").freeze
-
       def self.from_args(cask, **directives)
         new(cask, directives)
       end
@@ -360,16 +358,31 @@ module Cask
       def trash_paths(*paths, command: nil, **_)
         return if paths.empty?
 
-        trashable, untrashable = paths.partition(&:writable?)
-        unless untrashable.empty?
-          opoo "These files cannot be moved to the user's Trash:"
-          $stderr.puts untrashable
+        stdout, stderr, = system_command HOMEBREW_LIBRARY_PATH/"cask/utils/trash.swift",
+                                         args:         paths,
+                                         print_stderr: false
+
+        trashed = stdout.split(":").sort
+        untrashable = stderr.split(":").sort
+
+        return trashed, untrashable if untrashable.empty?
+
+        untrashable.delete_if do |path|
+          Utils.gain_permissions(path, ["-R"], SystemCommand) do
+            system_command! HOMEBREW_LIBRARY_PATH/"cask/utils/trash.swift",
+                            args:         [path],
+                            print_stderr: false
+          end
+
+          true
+        rescue
+          false
         end
 
-        result = command.run!("/usr/bin/swift", args: [TRASH_SCRIPT, *trashable])
+        opoo "The following files could not trashed, please do so manually:"
+        $stderr.puts untrashable
 
-        # Remove AppleScript's automatic newline.
-        result.tap { |r| r.stdout.sub!(/\n$/, "") }
+        [trashed, untrashable]
       end
 
       def uninstall_rmdir(*directories, command: nil, **_)

Library/Homebrew/cask/utils.rb

@@ -49,6 +49,7 @@ module Cask
           tried_permissions = true
           retry # rmtree
         end
+
         unless tried_ownership
           # in case of ownership problems
           # TODO: Further examine files to see if ownership is the problem
@@ -62,6 +63,8 @@ module Cask
           tried_permissions = false
           retry # rmtree
         end
+
+        raise
       end
     end
 

Library/Homebrew/cask/utils/trash.swift

@@ -2,27 +2,30 @@
 
 import Foundation
 
-struct swifterr: TextOutputStream {
-  public static var stream = swifterr()
-  mutating func write(_ string: String) { fputs(string, stderr) }
+extension FileHandle : TextOutputStream {
+  public func write(_ string: String) {
+    self.write(string.data(using: .utf8)!)
+  }
 }
 
-if (CommandLine.arguments.count < 2) {
-  exit(2)
-}
+var stderr = FileHandle.standardError
 
 let manager: FileManager = FileManager()
 
+var success = true
+
 for item in CommandLine.arguments[1...] {
   do {
     let path: URL = URL(fileURLWithPath: item)
-    try manager.trashItem(at: path, resultingItemURL: nil)
-    print(path, terminator: "\0")
-  }
-  catch {
-    print(error.localizedDescription, to: &swifterr.stream)
-    exit(1)
+    var trashedPath: NSURL!
+    try manager.trashItem(at: path, resultingItemURL: &trashedPath)
+    print((trashedPath as URL).path, terminator: ":")
+  } catch {
+    print(item, terminator: ":", to: &stderr)
+    success = false
   }
 }
 
-exit(0)
+guard success else {
+  exit(1)
+}

Library/Homebrew/test/cask/artifact/shared_examples/uninstall_zap.rb

@@ -199,8 +199,8 @@ shared_examples "#uninstall_phase or #zap_phase" do
       before do
         allow_any_instance_of(Cask::Artifact::AbstractUninstall).to receive(:trash_paths)
           .and_wrap_original do |method, *args|
-            method.call(*args).tap do |result|
-              FileUtils.rm_rf result.stdout.split("\0")
+            method.call(*args).tap do |trashed, _|
+              FileUtils.rm_r trashed
             end
           end
       end