sync installed_as_dependency when changing installed_on_request

[ooye-sanket]

When marking a formula as not installed on request, also set
installed_as_dependency to true, to ensure brew bundle dump
correctly excludes it.

Previously, brew tab --no-installed-on-request had no effect on
brew bundle dump because the dump logic in brew.rb checks both fields:

f[:installed_on_request?] || !f[:installed_as_dependency?]

Setting installed_on_request to false alone was not enough if
installed_as_dependency was also false — the second condition would
still evaluate to true, causing the formula to be included in the dump.

Fixes #21751

@MikeMcQuaid can you please review it!!

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[MikeMcQuaid]

@ooye-sanket thanks for the PR! I actually think the bigger change we should make is get rid of installed_as_dependency altogether; replace all call sites with installed_on_request and stop storing it in new Tabs for both formulae and casks.

[ooye-sanket]

Thanks @MikeMcQuaid!

I'd love to take on the bigger refactor. Before I start, could you clarify the approach?

• Should installed_on_request become the single source of truth (i.e., !installed_on_request replaces every installed_as_dependency check)?
• Should we keep reading the old installed_as_dependency from existing tab JSON files for backward compatibility, or drop that as well?
• Should this be a separate PR from the current one, or should I update this PR?

[MikeMcQuaid]

• Should installed_on_request become the single source of truth (i.e., !installed_on_request replaces every installed_as_dependency check)?

Yep!

• Should we keep reading the old installed_as_dependency from existing tab JSON files for backward compatibility, or drop that as well?

No, think we can skip/drop that too.

• Should this be a separate PR from the current one, or should I update this PR?

Can update this PR!

[ooye-sanket]

Hi @MikeMcQuaid, I've updated the PR with the full refactor as you suggested!

Here's what was done:

• Removed installed_as_dependency entirely from AbstractTab and Tab (no longer stored in new tab JSON files)
• Replaced all call sites with !installed_on_request installed_on_request is now the single source of truth
• Updated formula_installer.rb, cask/installer.rb, install.rb, reinstall.rb, upgrade.rb, bundle/brew.rb, cmd/leaves.rb, cmd/list.rb, formula.rb, cask/tab.rb and all related test files and fixtures
• Kept the --installed-as-dependency CLI flag in brew list and brew leaves as-is since it's a user-facing option

Could you confirm if this approach looks correct, or if there's anything I may have missed or handled incorrectly? Happy to make any adjustments!

[MikeMcQuaid]

Looks great, nice work @ooye-sanket! One more tiny suggestion.

[MikeMcQuaid]

Could add a commented-out odeprecated for the args.installed_as_dependency? so we can deprecate it in a future release.