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When installing a formula, `FormulaInstaller` calls `#pour`, which in turn calls:6f20c0300a/Library/Homebrew/formula_installer.rb (L1260)This `tab` is expected to have `#runtime_dependencies`, and it typically will because most packages come from http://ghcr.io6f20c0300a/Library/Homebrew/utils/bottles.rb (L111)Any `DownloadStrategy` that does not match `CurlGitHubPackagesDownloadStrategy` will lead here:6f20c0300a/Library/Homebrew/software_spec.rb (L463)Causing this branch to be executed for creating the `tab`:6f20c0300a/Library/Homebrew/utils/bottles.rb (L119)This causes a slight issue because `openjdk_dep_name_if_applicable` calls `keg.runtime_dependencies` when it's still `nil`.6f20c0300a/Library/Homebrew/keg_relocate.rb (L134-L140)And if it's blank, it won't do the regex replacement on `@@HOMEBREW_JAVA@@`, resulting in the following error when running `Kafka`: ```console $ tail -f /opt/homebrew/var/log/kafka/kafka_output.log /opt/homebrew/Cellar/kafka/3.6.0/libexec/bin/kafka-run-class.sh: line 346: /opt/homebrew/@@HOMEBREW_JAVA@@/bin/java: No such file or directory /opt/homebrew/Cellar/kafka/3.6.0/libexec/bin/kafka-run-class.sh: line 346: exec: /opt/homebrew/@@HOMEBREW_JAVA@@/bin/java: cannot execute: No such file or directory ``` As mentioned by: https://github.com/orgs/Homebrew/discussions/2530#discussioncomment-2002374 > Installing Java-dependent formulae from bottle mirrors doesn't work properly at the moment. The issue is that brew needs the manifest in order to correctly replace @@HOMEBREW_JAVA@@ but brew only knows how to fetch manifests from ghcr.io. > Pull requests to fix this welcome. This should fix this issue, by getting the `runtime_dependencies` directly from the formula for those cases that it can't get it from https://ghcr.io or tabfile ```ruby f_runtime_deps = formula.runtime_dependencies(read_from_tab: false) tab.runtime_dependencies = Tab.runtime_deps_hash(formula, f_runtime_deps) ```
Homebrew Ruby API
This is the API for Homebrew.
The main class you should look at is the {Formula} class (and classes linked from there). That's the class that's used to create Homebrew formulae (i.e. package descriptions). Assume anything else you stumble upon is private.
You may also find the Formula Cookbook and Ruby Style Guide helpful in creating formulae.
Good luck!