From 68e55cd9da7902ac8c8859507657cb013e234da4 Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <e.dolstra@tudelft.nl>
Date: Tue, 16 Feb 2010 00:10:39 +0000
Subject: [PATCH] * Since Hydra now escapes `+', `=' and `?' to %NN in URIs,  
 nix-prefetch-url should unescape them, because `%' is not a valid   character
 in store path names.

---
 scripts/nix-prefetch-url.in | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/scripts/nix-prefetch-url.in b/scripts/nix-prefetch-url.in
index a2a8a701f..7d8bd93a4 100644
--- a/scripts/nix-prefetch-url.in
+++ b/scripts/nix-prefetch-url.in
@@ -21,7 +21,10 @@ if test -z "$url"; then
     exit 1
 fi
 
-name=$(basename "$url")
+# Handle escaped characters in the URI.  `+', `=' and `?' are the only
+# characters that are valid in Nix store path names but have a special
+# meaning in URIs.
+name=$(basename "$url" | sed -e 's/%2b/+/g' -e 's/%3d/=/g' -e 's/%3f/\?/g')
 if test -z "$name"; then echo "invalid url"; exit 1; fi