Added a generator for CPAN expressions. Expressions often require manual editing, but still something..

svn path=/nixpkgs/trunk/; revision=11947

pkgs/development/perl-modules/expression-generator/retrieve-file-link.sh

@@ -0,0 +1,14 @@
+#! /bin/sh
+
+module_basename="$1";
+file_name="$2";
+
+version_regexp="${module_basename}(-[0-9.a-z]+){0,1}";
+author_regexp="[A-Z0-9]+";
+
+./retrieve-modulepage.sh "$module_basename" | 
+	egrep "[<]a href=\"[a-z0-9/]*/(${author_regexp}/){0,1}${version_regexp}/${file_name}" |
+	sed -re "s@.*href=\"@@; s@\".*@@" |
+	sed -re 's@^/@http://search.cpan.org/@';
+
+echo "$link_line";