Add brew install --as-dependency

This option avoids needing to immediately use
`brew tab --no-installed-on-request` when manually installing a
dependency.

Library/Homebrew/cmd/install.rb

@@ -104,6 +104,9 @@ module Homebrew
           [:switch, "--skip-link", {
             description: "Install but skip linking the keg into the prefix.",
           }],
+          [:switch, "--as-dependency", {
+            description: "Install but mark as installed as a dependency and not installed on request.",
+          }],
           [:flag, "--bottle-arch=", {
             depends_on:  "--build-bottle",
             description: "Optimise bottles for the specified architecture rather than the oldest " \
@@ -311,6 +314,8 @@ module Homebrew
 
         Install.install_formulae(
           installed_formulae,
+          installed_on_request:       !args.as_dependency?,
+          installed_as_dependency:    args.as_dependency?,
           build_bottle:               args.build_bottle?,
           force_bottle:               args.force_bottle?,
           bottle_arch:                args.bottle_arch,
@@ -336,7 +341,7 @@ module Homebrew
         Upgrade.check_installed_dependents(
           installed_formulae,
           flags:                      args.flags_only,
-          installed_on_request:       args.named.present?,
+          installed_on_request:       !args.as_dependency?,
           force_bottle:               args.force_bottle?,
           build_from_source_formulae: args.build_from_source_formulae,
           interactive:                args.interactive?,

Library/Homebrew/install.rb

@@ -233,6 +233,8 @@ module Homebrew
 
       def install_formulae(
         formulae_to_install,
+        installed_on_request: true,
+        installed_as_dependency: false,
         build_bottle: false,
         force_bottle: false,
         bottle_arch: nil,
@@ -261,8 +263,8 @@ module Homebrew
           formula_installer = FormulaInstaller.new(
             formula,
             options:                    build_options.used_options,
-            installed_on_request:       true,
+            installed_on_request:,
-            installed_as_dependency:    false,
+            installed_as_dependency:,
             build_bottle:,
             force_bottle:,
             bottle_arch:,

Library/Homebrew/sorbet/rbi/dsl/homebrew/cmd/install_cmd.rbi

@@ -20,6 +20,9 @@ class Homebrew::Cmd::InstallCmd::Args < Homebrew::CLI::Args
   sig { returns(T.nilable(String)) }
   def appdir; end
 
+  sig { returns(T::Boolean) }
+  def as_dependency?; end
+
   sig { returns(T::Boolean) }
   def ask?; end
 

completions/bash/brew

@@ -1402,6 +1402,7 @@ _brew_instal() {
       --HEAD
       --adopt
       --appdir
+      --as-dependency
       --ask
       --audio-unit-plugindir
       --binaries
@@ -1467,6 +1468,7 @@ _brew_install() {
       --HEAD
       --adopt
       --appdir
+      --as-dependency
       --ask
       --audio-unit-plugindir
       --binaries

completions/fish/brew.fish

@@ -944,6 +944,7 @@ __fish_brew_complete_arg 'info; and not __fish_seen_argument -l formula -l formu
 __fish_brew_complete_arg 'instal' -l HEAD -d 'If formula defines it, install the HEAD version, aka. main, trunk, unstable, master'
 __fish_brew_complete_arg 'instal' -l adopt -d 'Adopt existing artifacts in the destination that are identical to those being installed. Cannot be combined with `--force`'
 __fish_brew_complete_arg 'instal' -l appdir -d 'Target location for Applications (default: `/Applications`)'
+__fish_brew_complete_arg 'instal' -l as-dependency -d 'Install but mark as installed as a dependency and not installed on request'
 __fish_brew_complete_arg 'instal' -l ask -d 'Ask for confirmation before downloading and installing formulae. Print bottles and dependencies download size and install size'
 __fish_brew_complete_arg 'instal' -l audio-unit-plugindir -d 'Target location for Audio Unit Plugins (default: `~/Library/Audio/Plug-Ins/Components`)'
 __fish_brew_complete_arg 'instal' -l binaries -d 'Disable/enable linking of helper executables (default: enabled)'
@@ -1000,6 +1001,7 @@ __fish_brew_complete_cmd 'install' 'Install a formula or cask'
 __fish_brew_complete_arg 'install' -l HEAD -d 'If formula defines it, install the HEAD version, aka. main, trunk, unstable, master'
 __fish_brew_complete_arg 'install' -l adopt -d 'Adopt existing artifacts in the destination that are identical to those being installed. Cannot be combined with `--force`'
 __fish_brew_complete_arg 'install' -l appdir -d 'Target location for Applications (default: `/Applications`)'
+__fish_brew_complete_arg 'install' -l as-dependency -d 'Install but mark as installed as a dependency and not installed on request'
 __fish_brew_complete_arg 'install' -l ask -d 'Ask for confirmation before downloading and installing formulae. Print bottles and dependencies download size and install size'
 __fish_brew_complete_arg 'install' -l audio-unit-plugindir -d 'Target location for Audio Unit Plugins (default: `~/Library/Audio/Plug-Ins/Components`)'
 __fish_brew_complete_arg 'install' -l binaries -d 'Disable/enable linking of helper executables (default: enabled)'

completions/zsh/_brew

@@ -1187,6 +1187,7 @@ _brew_instal() {
     '(--cask)--HEAD[If formula defines it, install the HEAD version, aka. main, trunk, unstable, master]' \
     '(--formula --force)--adopt[Adopt existing artifacts in the destination that are identical to those being installed. Cannot be combined with `--force`]' \
     '(--formula)--appdir[Target location for Applications (default: `/Applications`)]' \
+    '(--cask)--as-dependency[Install but mark as installed as a dependency and not installed on request]' \
     '(--cask)--ask[Ask for confirmation before downloading and installing formulae. Print bottles and dependencies download size and install size]' \
     '(--formula)--audio-unit-plugindir[Target location for Audio Unit Plugins (default: `~/Library/Audio/Plug-Ins/Components`)]' \
     '(--formula)--binaries[Disable/enable linking of helper executables (default: enabled)]' \
@@ -1237,7 +1238,7 @@ _brew_instal() {
     '(--casks --binaries --require-sha --quarantine --adopt --skip-cask-deps --zap --appdir --keyboard-layoutdir --colorpickerdir --prefpanedir --qlplugindir --mdimporterdir --dictionarydir --fontdir --servicedir --input-methoddir --internet-plugindir --audio-unit-plugindir --vst-plugindir --vst3-plugindir --screen-saverdir --language)--formula[Treat all named arguments as formulae]' \
     '*::formula:__brew_formulae' \
     - cask \
-    '(--formulae --env --ignore-dependencies --only-dependencies --cc --build-from-source --force-bottle --include-test --HEAD --fetch-HEAD --keep-tmp --debug-symbols --build-bottle --skip-post-install --skip-link --bottle-arch --interactive --git --overwrite --ask)--cask[Treat all named arguments as casks]' \
+    '(--formulae --env --ignore-dependencies --only-dependencies --cc --build-from-source --force-bottle --include-test --HEAD --fetch-HEAD --keep-tmp --debug-symbols --build-bottle --skip-post-install --skip-link --as-dependency --bottle-arch --interactive --git --overwrite --ask)--cask[Treat all named arguments as casks]' \
     '*::cask:__brew_casks'
 }
 
@@ -1247,6 +1248,7 @@ _brew_install() {
     '(--cask)--HEAD[If formula defines it, install the HEAD version, aka. main, trunk, unstable, master]' \
     '(--formula --force)--adopt[Adopt existing artifacts in the destination that are identical to those being installed. Cannot be combined with `--force`]' \
     '(--formula)--appdir[Target location for Applications (default: `/Applications`)]' \
+    '(--cask)--as-dependency[Install but mark as installed as a dependency and not installed on request]' \
     '(--cask)--ask[Ask for confirmation before downloading and installing formulae. Print bottles and dependencies download size and install size]' \
     '(--formula)--audio-unit-plugindir[Target location for Audio Unit Plugins (default: `~/Library/Audio/Plug-Ins/Components`)]' \
     '(--formula)--binaries[Disable/enable linking of helper executables (default: enabled)]' \
@@ -1297,7 +1299,7 @@ _brew_install() {
     '(--casks --binaries --require-sha --quarantine --adopt --skip-cask-deps --zap --appdir --keyboard-layoutdir --colorpickerdir --prefpanedir --qlplugindir --mdimporterdir --dictionarydir --fontdir --servicedir --input-methoddir --internet-plugindir --audio-unit-plugindir --vst-plugindir --vst3-plugindir --screen-saverdir --language)--formula[Treat all named arguments as formulae]' \
     '*::formula:__brew_formulae' \
     - cask \
-    '(--formulae --env --ignore-dependencies --only-dependencies --cc --build-from-source --force-bottle --include-test --HEAD --fetch-HEAD --keep-tmp --debug-symbols --build-bottle --skip-post-install --skip-link --bottle-arch --interactive --git --overwrite --ask)--cask[Treat all named arguments as casks]' \
+    '(--formulae --env --ignore-dependencies --only-dependencies --cc --build-from-source --force-bottle --include-test --HEAD --fetch-HEAD --keep-tmp --debug-symbols --build-bottle --skip-post-install --skip-link --as-dependency --bottle-arch --interactive --git --overwrite --ask)--cask[Treat all named arguments as casks]' \
     '*::cask:__brew_casks'
 }
 

docs/Manpage.md

@@ -835,6 +835,10 @@ upgrade *`formula`* if it is already installed but outdated.
 
 : Install but skip linking the keg into the prefix.
 
+`--as-dependency`
+
+: Install but mark as installed as a dependency and not installed on request.
+
 `--bottle-arch`
 
 : Optimise bottles for the specified architecture rather than the oldest

manpages/brew.1

@@ -520,6 +520,9 @@ Install but skip any post\-install steps\.
 \fB\-\-skip\-link\fP
 Install but skip linking the keg into the prefix\.
 .TP
+\fB\-\-as\-dependency\fP
+Install but mark as installed as a dependency and not installed on request\.
+.TP
 \fB\-\-bottle\-arch\fP
 Optimise bottles for the specified architecture rather than the oldest architecture supported by the version of macOS the bottles are built on\.
 .TP