Add optional post_install method to Formula.

Sometimes we may want to run commands after bottle installation (such as
creating directories outside the Cellar) so this method allows us to do
so.

Closes #18382.

2 files changed, 5 insertions, 0 deletions

diff --git a/Library/Homebrew/formula.rb b/Library/Homebrew/formula.rb
index 1d9c1034c..2dc7d500c 100644
--- a/Library/Homebrew/formula.rb
+++ b/Library/Homebrew/formula.rb
@@ -188,6 +188,9 @@ class Formula
   # are supported.
   def pour_bottle?; true end
 
+  # Can be overridden to run commands on both source and bottle installation.
+  def post_install; end
+
   # tell the user about any caveats regarding this package, return a string
   def caveats; nil end
 
diff --git a/Library/Homebrew/formula_installer.rb b/Library/Homebrew/formula_installer.rb
index ace3b59fa..0b94c5b62 100644
--- a/Library/Homebrew/formula_installer.rb
+++ b/Library/Homebrew/formula_installer.rb
@@ -111,6 +111,8 @@ class FormulaInstaller
       clean
     end
 
+    f.post_install
+
     opoo "Nothing was installed to #{f.prefix}" unless f.installed?
   end