test-bot fails in github action for custom tap with error "installing formula from paths or URLs is deprecated"

[swlynch99]

brew doctor output

(from https://github.com/swlynch99/homebrew-repro-tap/actions/runs/11062989014/job/30738375805?pr=1)

All steps passed!

Verification

• My "brew doctor output" above says Your system is ready to brew. and am still able to reproduce my issue.
• I ran brew update twice and am still able to reproduce my issue.
• This issue's title and/or description do not reference a single formula e.g. brew install wget. If they do, open an issue at https://github.com/Homebrew/homebrew-core/issues/new/choose instead.

brew config output

(from https://github.com/swlynch99/homebrew-repro-tap/actions/runs/11062989014/job/30738375805?pr=1)

HOMEBREW_VERSION: 4.3.24-89-gb72544e
ORIGIN: https://github.com/Homebrew/brew
HEAD: b72544eb04da79e65450ae18ead849d6ff90887f
Last commit: 6 hours ago
Core tap JSON: 27 Sep 01:35 UTC
HOMEBREW_PREFIX: /home/linuxbrew/.linuxbrew
HOMEBREW_BOOTSNAP: set
HOMEBREW_CACHE: /home/runner/.cache/Homebrew
HOMEBREW_CASK_OPTS: []
HOMEBREW_CLEANUP_PERIODIC_FULL_DAYS: 3650
HOMEBREW_COLOR: set
HOMEBREW_CURL_PATH: /usr/bin/curl
HOMEBREW_DEVELOPER: set
HOMEBREW_FAIL_LOG_LINES: 150
HOMEBREW_GITHUB_API_TOKEN: set
HOMEBREW_GIT_EMAIL: [email protected]
HOMEBREW_GIT_NAME: BrewTestBot
HOMEBREW_GIT_PATH: /usr/bin/git
HOMEBREW_LOGS: /home/runner/work/homebrew-repro-tap/homebrew-repro-tap/logs
HOMEBREW_MAKE_JOBS: 4
HOMEBREW_NO_AUTO_UPDATE: set
HOMEBREW_NO_EMOJI: set
HOMEBREW_NO_ENV_HINTS: set
HOMEBREW_NO_INSTALLED_DEPENDENTS_CHECK: set
HOMEBREW_SORBET_RUNTIME: set
HOMEBREW_VERIFY_ATTESTATIONS: set
Homebrew Ruby: 3.3.4 => /home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/vendor/portable-ruby/3.3.4_1/bin/ruby
CPU: quad-core 64-bit zen3
Clang: 14.0.0
Git: 2.46.1 => /usr/bin/git
Curl: 7.81.0 => /usr/bin/curl
Kernel: Linux 6.8.0-1014-azure x86_64 GNU/Linux
OS: Ubuntu 22.04.5 LTS (jammy)
Host glibc: 2.35
/usr/bin/gcc: 11.4.0
/usr/bin/ruby: 3.0.2
glibc: N/A
gcc@11: N/A
gcc: N/A
xorg: N/A

What were you trying to do (and why)?

I was attempting to update a formula within a custom tap for one of my company's projects. Previous formula updates using the same github actions workflows had worked fine.

I have since reproduced the issue in a completely empty tap created via brew tap-new (see swlynch99/homebrew-repro-tap#1).

Running brew test-bot locally works fine (other than warning about not being on the default branch) but will always fail in CI.

What happened (include all command output)?

I created a PR with a new formula. In its CI, brew test-bot --only-tap-syntax fails with the following output

==> Using Homebrew/homebrew-test-bot c43db6c (Merge pull request #1237 from Homebrew/dependabot/bundler/sorbet-runtime-0.5.11582)
==> Using Homebrew/brew 4.3.24-89-gb72544eb04 (Merge pull request #18429 from Homebrew/dependabot/github_actions/ruby/setup-ruby-1.194.0)
==> Testing swlynch99/homebrew-repro-tap ca7cf6d (Merge a1cda5305e61ec2e09a3a277171414957db34457 into d110b2b1d35bcbc960bded358822ae3e3a4ebaa3):

==> Running TapSyntax#run!
==> brew style swlynch99/repro-tap
==> brew readall --aliases --os=all --arch=all swlynch99/repro-tap
==> brew audit --except=installed --tap=swlynch99/repro-tap
==> FAILED
Full audit --except=installed --tap=swlynch99/repro-tap output
  Error: Calling installing formulae from paths or URLs is deprecated! Use installing formulae from taps instead.
  Error: Calling installing formulae from paths or URLs is deprecated! Use installing formulae from taps instead.
  Error: Calling installing formulae from paths or URLs is deprecated! Use installing formulae from taps instead.
Error: 1 failed step!
brew audit --except=installed --tap=swlynch99/repro-tap

What did you expect to happen?

brew test-bot should not exit with an error in this case.

Step-by-step reproduction instructions (by running brew commands)

I have a live repro of this failure in the PR/repo here: swlynch99/homebrew-repro-tap#1

1. Create a new tap

   brew tap-new swlynch99/homebrew-repro-tap
   

2. Publish said tap as a git repo (see https://github.com/swlynch99/homebrew-repro-tap)
3. Create a PR with a new formula (see Add cargo-deduplicate-warnings formula swlynch99/homebrew-repro-tap#1)
4. brew test-bot --only-tap-syntax will then fail in CI.