Throttle does not work for llama.cpp

[fxcoudert]

brew doctor output

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Warning: Some taps are not on the default git origin branch and may not receive
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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

HOMEBREW_VERSION: 4.3.19-113-gfc49faf
ORIGIN: https://github.com/Homebrew/brew
HEAD: fc49faf68366d04162dff5ff373e899304278622
Last commit: 11 hours ago
Core tap HEAD: 7dd39b2074c2a265f5876fac01b7e8dda6a332f7
Core tap last commit: 9 hours ago
Core tap branch: bump-llama.cpp-3707
Core tap JSON: 02 Apr 07:55 UTC
Core cask tap HEAD: f70d37ccb8d9aed963e3edffc78067cb22b9892b
Core cask tap last commit: 10 hours ago
Core cask tap JSON: 02 Apr 07:55 UTC
HOMEBREW_PREFIX: /opt/homebrew
HOMEBREW_CASK_OPTS: []
HOMEBREW_DISPLAY: /private/tmp/com.apple.launchd.JKesxo5gEP/org.xquartz:0
HOMEBREW_EDITOR: vim
HOMEBREW_GITHUB_API_TOKEN: set
HOMEBREW_MAKE_JOBS: 8
HOMEBREW_NO_AUTO_UPDATE: set
HOMEBREW_NO_INSTALL_CLEANUP: set
HOMEBREW_NO_INSTALL_FROM_API: set
HOMEBREW_SORBET_RUNTIME: set
Homebrew Ruby: 3.3.4 => /opt/homebrew/Library/Homebrew/vendor/portable-ruby/3.3.4_1/bin/ruby
CPU: octa-core 64-bit arm_firestorm_icestorm
Clang: 15.0.0 build 1500
Git: 2.39.3 => /Applications/Xcode.app/Contents/Developer/usr/bin/git
Curl: 8.7.1 => /usr/bin/curl
macOS: 14.6.1-arm64
CLT: 15.3.0.0.1.1708646388
Xcode: 15.4
Rosetta 2: false

What were you trying to do (and why)?

Trying to throttle the llama.cpp formula in PR Homebrew/homebrew-core#183973 because it ships too many versions per day.

What happened (include all command output)?

With the PR applied, I get:

⏚ [fx:/opt/ … ary/Taps/homebrew/homebrew-core/Formula] bump-llama.cpp-3707 ± brew livecheck llama.cpp
llama.cpp: 3705 ==> 3707

What did you expect to happen?

I would expect the throttling to work, and not propose versions that are not multiples of 5.

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

- Apply the PR
- Run `brew livecheck llama.cpp`

[fxcoudert]

PS: it's about the llama.cpp but I still think it's a generic brew bug, probably failure to correctly parse its versioning scheme? It could happen for other formulas, although I have no example at the moment.

[Bo98]

Throttling major versions is not currently supported. Only patch versions.

A possible solution is instead of throttling the patch version we throttle the "last component", but this might incorrectly handle projects that use X.Y.Z but omit Z on .0.