1 files changed, 45 insertions, 0 deletions
diff --git a/Library/Homebrew/brew.h.rb b/Library/Homebrew/brew.h.rb
index c660b1886..3f30ca6e8 100644
--- a/Library/Homebrew/brew.h.rb
+++ b/Library/Homebrew/brew.h.rb
@@ -418,6 +418,51 @@ def search_brews text
   end
 end
 
+def brew_install
+  require 'formula_installer'
+  require 'hardware'
+
+  ############################################################ sanity checks
+  case Hardware.cpu_type when :ppc, :dunno
+    abort "Sorry, Homebrew does not support your computer's CPU architecture.\n"+
+          "For PPC support, see: http://github.com/sceaga/homebrew/tree/powerpc"
+  end
+
+  raise "Cannot write to #{HOMEBREW_CELLAR}" if HOMEBREW_CELLAR.exist? and not HOMEBREW_CELLAR.writable?
+  raise "Cannot write to #{HOMEBREW_PREFIX}" unless HOMEBREW_PREFIX.writable?
+
+  ################################################################# warnings
+  begin
+    if MACOS_VERSION >= 10.6
+      opoo "You should upgrade to Xcode 3.2.1" if llvm_build < RECOMMENDED_LLVM
+    else
+      opoo "You should upgrade to Xcode 3.1.4" if (gcc_40_build < RECOMMENDED_GCC_40) or (gcc_42_build < RECOMMENDED_GCC_42)
+    end
+  rescue
+    # the reason we don't abort is some formula don't require Xcode
+    # TODO allow formula to declare themselves as "not needing Xcode"
+    opoo "Xcode is not installed! Builds may fail!"
+  end
+
+  if macports_or_fink_installed?
+    opoo "It appears you have Macports or Fink installed"
+    puts "Although, unlikely, this can break builds or cause obscure runtime issues."
+    puts "If you experience problems try uninstalling these tools."
+  end
+
+  ################################################################# install!
+  installer = FormulaInstaller.new
+  installer.install_deps = !ARGV.include?('--ignore-dependencies')
+
+  ARGV.formulae.each do |f|
+    if not f.installed? or ARGV.force?
+      installer.install f
+    else
+      puts "Formula already installed: #{f.prefix}"
+    end
+  end
+end
+
 ########################################################## class PrettyListing
 class PrettyListing
   def initialize path