Marshal install.rb exceptions back to the parent process

Using an error pipe.

The use of ENV[HOMEBREW_ERROR_PIPE] feels wrong, but I wasn't sure how else to
proxy the file descriptor to the child process since the fork immediately
calls exec.

1 files changed, 10 insertions, 3 deletions

diff --git a/Library/Homebrew/install.rb b/Library/Homebrew/install.rb
index f3ddd34bb..927e976bc 100755
--- a/Library/Homebrew/install.rb
+++ b/Library/Homebrew/install.rb
@@ -137,9 +137,16 @@ def install f
   puts
 
 rescue Exception => e
-  #TODO propogate exception back to brew script
-  onoe e
-  puts e.backtrace
+  if ENV['HOMEBREW_ERROR_PIPE']
+    pipe = IO.new(ENV['HOMEBREW_ERROR_PIPE'].to_i, 'w')
+    Marshal.dump(e, pipe)
+    pipe.close
+    exit! 1
+  else
+    onoe e
+    puts e.backtrace
+    exit! 2
+  end
 end