Move brew-leaves into core

Closes #24371.

3 files changed, 32 insertions, 29 deletions

diff --git a/Library/Contributions/cmd/brew-leaves.rb b/Library/Contributions/cmd/brew-leaves.rb
index b1296598b..e69de29bb 100755
--- a/Library/Contributions/cmd/brew-leaves.rb
+++ b/Library/Contributions/cmd/brew-leaves.rb
@@ -1,29 +0,0 @@
-# Outputs formulae that are installed but are not a dependency for
-# any other installed formula.
-# See: http://github.com/mxcl/homebrew/issues/issue/1438
-
-require 'formula'
-require 'set'
-require 'tab'
-
-installed = Formula.installed
-deps_of_installed = Set.new
-
-installed.each do |f|
-  deps = []
-
-  f.deps.each do |dep|
-    if dep.optional? || dep.recommended?
-      tab = Tab.for_formula(f)
-      deps << dep.name if tab.with?(dep.name)
-    else
-      deps << dep.name
-    end
-  end
-
-  deps_of_installed.merge(deps)
-end
-
-installed.each do |f|
-  puts f.name unless deps_of_installed.include? f.name
-end
diff --git a/Library/Contributions/manpages/brew.1.md b/Library/Contributions/manpages/brew.1.md
index 6ba333e06..280664704 100644
--- a/Library/Contributions/manpages/brew.1.md
+++ b/Library/Contributions/manpages/brew.1.md
@@ -197,6 +197,9 @@ Note that these flags should only appear after a command.
     If `--git` is passed, Homebrew will create a Git repository, useful for
     creating patches to the software.
 
+  * `leaves`:
+    Show installed formulae that are not dependencies of another installed formula.
+
   * `ln`, `link [--overwrite] [--dry-run] [--force]` <formula>:
     Symlink all of <formula>'s installed files into the Homebrew prefix. This
     is done automatically when you install formula, but can be useful for DIY
diff --git a/Library/Homebrew/cmd/leaves.rb b/Library/Homebrew/cmd/leaves.rb
new file mode 100644
index 000000000..bffa332d6
--- /dev/null
+++ b/Library/Homebrew/cmd/leaves.rb
@@ -0,0 +1,29 @@
+require 'formula'
+require 'tab'
+require 'set'
+
+module Homebrew extend self
+  def leaves
+    installed = Formula.installed
+    deps_of_installed = Set.new
+
+    installed.each do |f|
+      deps = []
+
+      f.deps.each do |dep|
+        if dep.optional? || dep.recommended?
+          tab = Tab.for_formula(f)
+          deps << dep.name if tab.with?(dep.name)
+        else
+          deps << dep.name
+        end
+      end
+
+      deps_of_installed.merge(deps)
+    end
+
+    installed.each do |f|
+      puts f.name unless deps_of_installed.include? f.name
+    end
+  end
+end