Adding --require-sha to HOMEBREW_CASK_OPTS breaks search

[themediapot]

General troubleshooting steps

• [X] I understand that if I ignore these instructions, my issue may be closed without review.
• [X] I have retried my command with --force.
• [X] I ran brew update-reset && brew update and retried my command.
• [X] I ran brew doctor, fixed as many issues as possible and retried my command.
• [X] I have checked the instructions for reporting bugs.
• [X] I made doubly sure this is not a checksum does not match error.

Description of issue

Having --require-sha to HOMEBREW_CASK_OPTS breaks search, similar to https://github.com/Homebrew/homebrew-cask/issues/24924.

Command that failed

brew cask search $searchterm

Output of command with --force --verbose --debug

➜ brew cask search --force --verbose --debug font-duo
Error: Unknown subcommand: --require-sha

Commands:
    --cache    display the file used to cache the Cask
    audit      verifies installability of Casks
    cat        dump raw source of the given Cask to the standard output
    create     creates the given Cask and opens it in an editor
    doctor     checks for configuration issues
    edit       edits the given Cask
    fetch      downloads remote application files to local cache
    help       print help strings for commands
    home       opens the homepage of the given Cask
    info       displays information about the given Cask
    install    installs the given Cask
    list       lists installed Casks or the casks provided in the arguments
    outdated   list the outdated installed Casks
    reinstall  reinstalls the given Cask
    style      checks Cask style using RuboCop
    uninstall  uninstalls the given Cask
    upgrade    upgrades all outdated casks
    zap        zaps all files associated with the given Cask

See also "man brew-cask"

Output of brew cask doctor

➜ brew cask doctor
==> Homebrew Version
2.4.6-33-g4a20f76
==> macOS
10.15.5
==> SIP
Enabled
==> Java
N/A
==> xattr issues
<NONE>
==> Gatekeeper support

Error: Unknown support status
==> Homebrew Cask Install Location
<NONE>
==> Homebrew Cask Staging Location
/usr/local/Caskroom
==> Homebrew Cask Taps:
/usr/local/Homebrew/Library/Taps/homebrew/homebrew-cask (3615 casks)
/usr/local/Homebrew/Library/Taps/homebrew/homebrew-cask-versions (155 casks)
/usr/local/Homebrew/Library/Taps/homebrew/homebrew-cask-fonts (1547 casks)
/usr/local/Homebrew/Library/Taps/homebrew/homebrew-cask-drivers (151 casks)
/usr/local/Homebrew/Library/Taps/sticklerm3/homebrew-pourhouse (46 casks)
==> Contents of $LOAD_PATH
/usr/local/Homebrew/Library/Homebrew/vendor/bundle/bundler/../ruby/2.6.0/gems/ruby-macho-2.2.0/lib
/usr/local/Homebrew/Library/Homebrew/vendor/bundle/bundler/../ruby/2.6.0/gems/rubocop-rspec-1.42.0/lib
/usr/local/Homebrew/Library/Homebrew/vendor/bundle/bundler/../ruby/2.6.0/gems/rubocop-performance-1.7.0/lib
/usr/local/Homebrew/Library/Homebrew/vendor/bundle/bundler/../ruby/2.6.0/gems/rexml-3.2.4/lib
/usr/local/Homebrew/Library/Homebrew/vendor/bundle/bundler/../ruby/2.6.0/gems/plist-3.5.0/lib
/usr/local/Homebrew/Library/Homebrew/vendor/bundle/bundler/../ruby/2.6.0/gems/mechanize-2.7.6/lib
/usr/local/Homebrew/Library/Homebrew/vendor/bundle/bundler/
/usr/local/Homebrew/Library/Homebrew/vendor/bundle/bundler/../ruby/2.6.0/gems/activesupport-6.0.3.2/lib
/usr/local/Homebrew/Library/Homebrew/vendor/bundle/bundler/../ruby/2.6.0/gems/zeitwerk-2.3.1/lib
/usr/local/Homebrew/Library/Homebrew/vendor/bundle/bundler/../ruby/2.6.0/gems/tzinfo-1.2.7/lib
/usr/local/Homebrew/Library/Homebrew/vendor/bundle/bundler/../ruby/2.6.0/gems/thread_safe-0.3.6/lib
/usr/local/Homebrew/Library/Homebrew/vendor/bundle/bundler/../ruby/2.6.0/gems/i18n-1.8.3/lib
/usr/local/Homebrew/Library/Homebrew/vendor/bundle/bundler/../ruby/2.6.0/gems/concurrent-ruby-1.1.6/lib/concurrent-ruby
/Library/Ruby/Site/2.6.0
/Library/Ruby/Site/2.6.0/universal-darwin19
/Library/Ruby/Site
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/vendor_ruby/2.6.0
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/vendor_ruby/2.6.0/universal-darwin19
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/vendor_ruby
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/universal-darwin19
/usr/local/Homebrew/Library/Homebrew
==> Environment Variables
HOMEBREW_CASK_OPTS="--require-sha"
LC_ALL="en_US.UTF-8"
PATH="/usr/local/Homebrew/Library/Homebrew/shims/scm:/usr/bin:/bin:/usr/sbin:/sbin"
SHELL="/bin/zsh"

Output of brew tap

➜ brew tap
homebrew/cask
homebrew/cask-drivers
homebrew/cask-fonts
homebrew/cask-versions
homebrew/core
sticklerm3/pourhouse
vitorgalvao/tiny-scripts

[vitorgalvao]

brew cask search hasn’t been a thing for a long time. Only brew search is available now.