`brew upgrade`

Consequence: you can no longer install when something is already installed, you must upgrade it. This doesn't apply if the formula in question was unlinked. You can still --force installs though.

Rationale: the old way of installing over the top would leave symlinks to multiple versions in /usr/local if the old version had a file the newer version didn't. The new upgrade command handles everything properly.

1 files changed, 15 insertions, 11 deletions

diff --git a/Library/Homebrew/cmd/install.rb b/Library/Homebrew/cmd/install.rb
index b7f9e7cae..4b2711994 100644
--- a/Library/Homebrew/cmd/install.rb
+++ b/Library/Homebrew/cmd/install.rb
@@ -57,22 +57,26 @@ module Homebrew extend self
     end
   end
 
-  def install_formulae formulae
-    formulae = [formulae].flatten.compact
-    return if formulae.empty?
-
+  def perform_preinstall_checks
     check_ppc
     check_writable_install_location
     check_cc
     check_macports
+  end
 
-    formulae.each do |f|
-      begin
-        installer = FormulaInstaller.new f
-        installer.ignore_deps = ARGV.include? '--ignore-dependencies'
-        installer.go
-      rescue FormulaAlreadyInstalledError => e
-        opoo e.message
+  def install_formulae formulae
+    formulae = [formulae].flatten.compact
+    unless formulae.empty?
+      perform_preinstall_checks
+      formulae.each do |f|
+        begin
+          fi = FormulaInstaller.new(f)
+          fi.install
+          fi.caveats
+          fi.finish
+        rescue FormulaAlreadyInstalledError => e
+          opoo e.message
+        end
       end
     end
   end