Homebrew cask: generated tap warning — switch hooks.post.install to install_steps once GoReleaser ships it

[Dedsecproject]

Every brew operation that reads localstack/tap/lstk currently prints a deprecation warning to end users:

Warning: Calling `postflight` is deprecated! Use `postflight_steps` instead.
Please report this issue to the localstack/homebrew-tap tap ...
  Casks/lstk.rb:39

Root cause

.goreleaser.yaml configures the tap release via raw-Ruby hook:

hooks:
  post:
    install: |
      if OS.mac?
        system_command "/usr/bin/xattr", args: ["-dr", "com.apple.quarantine", "#{staged_path}/lstk"]
      end

GoReleaser passes this body through verbatim into the now-deprecated cask postflight stanza.

Suggested fix

Homebrew deprecated the raw-Ruby preflight/postflight blocks in favor of structured *_steps stanzas (Homebrew/brew#23366). GoReleaser support for the structured DSL is already up as goreleaser/goreleaser#6873 (all checks green at the time of writing). Once that ships, the config can become:

hooks:
  post:
    install_steps: |
      on_macos do
        run "/usr/bin/xattr", args: ["-dr", "com.apple.quarantine", "{{ .StagedPath }}/lstk"]
      end

(Note: raw #{staged_path} interpolation is not available in the new DSL; GoReleaser #6873 adds {{ .StagedPath }} for exactly this.)

Interim state

The generated cask has been patched manually in the interim: localstack/homebrew-tap#8 \u2014 verified via brew style and a real install on macOS arm64. Note that the next lstk release regenerates the cask and would reintroduce the legacy stanza until this config lands.

[gtsiolis]

Thanks for reporting, @Dedsecproject!

Cross-linking also localstack/homebrew-tap#7 for visibility.

[highlordleonas]

Confirmed this is still reproducible with lstk 1.1.0 on Homebrew as of 2026-09-19.

Environment/output:

$ brew tap | grep localstack
localstack/tap

$ brew list --cask | grep -E 'localstack|lstk'
lstk

$ which lstk
/opt/homebrew/bin/lstk

$ lstk --version
lstk 1.1.0

Running Homebrew operations that load the cask still emits:

Warning: Calling `postflight` is deprecated! Use `postflight_steps` instead.
Please report this issue to the localstack/homebrew-tap tap (not Homebrew/* repositories), or even better, submit a PR to fix it:
  /opt/homebrew/Library/Taps/localstack/homebrew-tap/Casks/lstk.rb:39

So the current published 1.1.0 cask is still affected.

Happy to retest the generated cask once the GoReleaser install_steps support lands and the source config is updated.

[highlordleonas]

A couple quick notes this morning. Was looking into a few other things, just calling out a quick gotcha once goreleaser/goreleaser#6873 is available in a stable v2 release:

The durable change should stay in lstk/.goreleaser.yaml, not homebrew-tap/Casks/lstk.rb.

Expected source change would be something like this:

hooks:
  post:
-   install: |
-     if OS.mac?
-       system_command "/usr/bin/xattr", args: ["-dr", "com.apple.quarantine", "#{staged_path}/lstk"]
+   install_steps: |
+     on_macos do
+       run "/usr/bin/xattr", args: ["-dr", "com.apple.quarantine", "{{ .StagedPath }}/lstk"]
      end

The important distinction and gotcha: {{ .StagedPath }} is the GoReleaser template field added by #6873. It should generate Homebrew's {{staged_path}} token in the resulting cask. The two forms apply at different stages of generation.

[joe4dev]

Thank you for reporting @Dedsecproject and opening the quickfix PR localstack/homebrew-tap#8
/cc @highlordleonas @gtsiolis

Reproducer

I can confirm the issue is now fixed (no more deprecation warning) after merging localstack/homebrew-tap#8