Error: attempted to use a Downloadable without a URL! Homebrew Cask?

[lancejpollard]

Output of brew config

HOMEBREW_VERSION: 4.2.5-32-g86e1c8a
ORIGIN: https://github.com/Homebrew/brew
HEAD: 86e1c8aacf6196e10cef705fe01fc8d8f6737ec4
Last commit: 2 hours ago
Core tap JSON: 22 Jan 21:27 UTC
Core cask tap JSON: 22 Jan 21:27 UTC
HOMEBREW_PREFIX: /opt/homebrew
HOMEBREW_CASK_OPTS: []
HOMEBREW_EDITOR: code
HOMEBREW_MAKE_JOBS: 12
HOMEBREW_SORBET_RUNTIME: set
Homebrew Ruby: 3.1.4 => /opt/homebrew/Library/Homebrew/vendor/portable-ruby/3.1.4/bin/ruby
CPU: dodeca-core 64-bit arm_lobos
Clang: 15.0.0 build 1500
Git: 2.39.3 => /Applications/Xcode.app/Contents/Developer/usr/bin/git
Curl: 8.4.0 => /usr/bin/curl
macOS: 14.2.1-arm64
CLT: 15.1.0.0.1.1700200546
Xcode: 15.2
Rosetta 2: false

Output of brew doctor

Please note that these warnings are just used to help the Homebrew maintainers
with debugging if you file an issue. If everything you use Homebrew for is
working fine: please don't worry or file an issue; just ignore this. Thanks!

Warning: Some installed formulae are deprecated or disabled.
You should find replacements for the following formulae:
  [email protected]

Warning: Unbrewed dylibs were found in /usr/local/lib.
If you didn't put them there on purpose they could cause problems when
building Homebrew formulae, and may need to be deleted.

Unexpected dylibs:
  /usr/local/lib/libSDL3.1.0.0.dylib

Warning: Unbrewed header files were found in /usr/local/include.
If you didn't put them there on purpose they could cause problems when
building Homebrew formulae, and may need to be deleted.

Unexpected header files:
  /usr/local/include/SDL3/SDL.h
  ...tons more
  /usr/local/include/node/cppgc/allocation.h
  ...tons more
  /usr/local/include/node/js_native_api.h
  /usr/local/include/node/js_native_api_types.h
  /usr/local/include/node/libplatform/libplatform-export.h
  /usr/local/include/node/libplatform/libplatform.h
  /usr/local/include/node/libplatform/v8-tracing.h
  /usr/local/include/node/node.h
  /usr/local/include/node/node_api.h
  /usr/local/include/node/node_api_types.h
  /usr/local/include/node/node_buffer.h
  /usr/local/include/node/node_object_wrap.h
  /usr/local/include/node/node_version.h
  /usr/local/include/node/openssl/aes.h
  /usr/local/include/node/openssl/archs/BSD-x86/asm/crypto/buildinf.h
  ...tons more for multiple archs'
  /usr/local/include/node/uv.h
  ...many more

Warning: Unbrewed '.pc' files were found in /usr/local/lib/pkgconfig.
If you didn't put them there on purpose they could cause problems when
building Homebrew formulae, and may need to be deleted.

Unexpected '.pc' files:
  /usr/local/lib/pkgconfig/sdl3.pc

Warning: Unbrewed static libraries were found in /usr/local/lib.
If you didn't put them there on purpose they could cause problems when
building Homebrew formulae, and may need to be deleted.

Unexpected static libraries:
  /usr/local/lib/libSDL3.a
  /usr/local/lib/libSDL3_test.a

Warning: You have unlinked kegs in your Cellar.
Leaving kegs unlinked can lead to build-trouble and cause formulae that depend on
those kegs to fail to run properly once built. Run `brew link` on these:
  python-jinja
  python-certifi
  python-idna
  python-packaging
  python-click
  pygments
  python-dateutil
  python-requests
  python-urllib3
  python-psutil
  python-attrs
  pyyaml
  six
  python-charset-normalizer
  python-markupsafe

Description of issue

$ brew install --cask ./Casks/task.rb

Warning: Cask 'task' is unreadable: wrong number of arguments (given 1, expected 0)
==> Searching for similarly named casks...
Error: Cask 'task' is unreadable: wrong number of arguments (given 1, expected 0)

That task.rb is like this for now:

cask "task" do
  # name "task"
  # desc "Common Actions Interface Dependencies"
  # homepage "https://github.com/termsurf/task.js"
  # url "https://github.com/termsurf/task.js"
  # version "0.0.1"

  # depends_on macos: ">= :sierra"

  depends_on formula: "java"
  # depends_on cask: "mactex-no-gui"
  # depends_on formula: "calibre"
  # depends_on formula: "libreoffice"
  # depends_on formula: "imagemagick"
  # depends_on formula: "fontforge"
  # depends_on formula: "ffmpeg"
  # depends_on formula: "go"
  # depends_on formula: "unoconv"
  # depends_on formula: "qpdf"
  # depends_on formula: "mvn"
  # depends_on formula: "objconv"
  # depends_on formula: "wabt"
  # depends_on formula: "unar"
  # depends_on formula: "pyenv"
  # depends_on formula: "jupyter"
  # depends_on formula: "atool"
  # depends_on formula: "perltidy"
  # depends_on formula: "php-cs-fixer"

  # postflight do
  #   system_command "go install github.com/klauspost/asmfmt/cmd/asmfmt@ef134b9cec704e2b7b336fb02153b7d1a58247da"
  #   system_command "pip install nbconvert"
  #   system_command "pip install docx2pdf"
  # end
end

When running I get:

Error: attempted to use a Downloadable without a URL!
Please report this issue:
  https://docs.brew.sh/Troubleshooting
Warning: Removed Sorbet lines from backtrace!
Rerun with --verbose to see the original backtrace
/opt/homebrew/Library/Homebrew/downloadable.rb:75:in `downloader'
/opt/homebrew/Library/Homebrew/downloadable.rb:87:in `fetch'
/opt/homebrew/Library/Homebrew/cask/download.rb:55:in `fetch'
/opt/homebrew/Library/Homebrew/cask/installer.rb:181:in `download'
/opt/homebrew/Library/Homebrew/cask/installer.rb:71:in `fetch'
/opt/homebrew/Library/Homebrew/cask/installer.rb:101:in `install'
/opt/homebrew/Library/Homebrew/cmd/install.rb:244:in `block in install'
/opt/homebrew/Library/Homebrew/cmd/install.rb:233:in `each'
/opt/homebrew/Library/Homebrew/cmd/install.rb:233:in `install'
/opt/homebrew/Library/Homebrew/brew.rb:86:in `<main>'

This is an alternative configuration of the cask from https://github.com/orgs/Homebrew/discussions/5075.

Relevant casks

https://github.com/termsurf/homebrew-load/blob/2788ca21bb913f3a7f997f9da036d2ecc4450cde/Casks/task.rb

Haven't found many docs on this, but using https://rubydoc.brew.sh/Cask/DSL/DependsOn.html

[lancejpollard]

Need to specify a url in the cask dsl 😆