From 43d1f6790b777b014c6cbcb11674ad1fdee63abc Mon Sep 17 00:00:00 2001
From: Adam Vandenberg <flangy@gmail.com>
Date: Fri, 18 Jun 2010 13:42:12 -0700
Subject: [PATCH] Note how to redownload tarballs on failed checksum.

Fixes Homebrew/homebrew#659
---
 Library/Homebrew/formula.rb | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/Library/Homebrew/formula.rb b/Library/Homebrew/formula.rb
index 9471f58b56..7f8b5ebc53 100644
--- a/Library/Homebrew/formula.rb
+++ b/Library/Homebrew/formula.rb
@@ -371,7 +371,14 @@ private
     hash = fn.incremental_hash(hasher)
 
     if supplied and not supplied.empty?
-      raise "#{type} mismatch\nExpected: #{supplied}\nGot: #{hash}\nArchive: #{fn}" unless supplied.upcase == hash.upcase
+      message = <<-EOF
+#{type} mismatch
+Expected: #{supplied}
+Got: #{hash}
+Archive: #{fn}
+(To retry an incomplete download, remove the file above.)
+EOF
+      raise message unless supplied.upcase == hash.upcase
     else
       opoo "Cannot verify package integrity"
       puts "The formula did not provide a download checksum"