perl: make post-make-hook script compatible with Python 3

component/perl/buildout.cfg

@@ -25,4 +25,4 @@ configure-command =
     -Dusethreads
 environment =
   PATH=${patch:location}/bin:%(PATH)s
-post-make-hook = ${:_profile_base_location_}/perl-create-libs-symlink.py#28d12de5c9c7985e65233d56817e3bec:post_make_hook
+post-make-hook = ${:_profile_base_location_}/perl-create-libs-symlink.py#943453b7d3ff8d49ed12d44a7f7076ee:post_make_hook

component/perl/perl-create-libs-symlink.py

-
+from zc.buildout import UserError
 import fnmatch
 import os
-import pprint
-
 
 def post_make_hook(options, buildout):
   location = options['location']
-  matches = []
-  for root, dirnames, filenames in os.walk(location):
-    for filename in fnmatch.filter(filenames, 'libperl.a'):
-      matches.append(os.path.join(root, filename))
-  nr_matches = len(matches)
-  if nr_matches == 0:
-    print "ERROR - no libperl.* found!"
-    exit
-  elif nr_matches > 1:
-    print "WARNING - several libperl.a found, taking only the first one:", "\n".join(matches)
-  
+  matches = [os.path.join(root, filename)
+    for root, dirnames, filenames in os.walk(location)
+    for filename in fnmatch.filter(filenames, 'libperl.a')]
+  if not matches:
+    raise UserError("ERROR - no libperl.* found!")
+  if len(matches) > 1:
+    print("WARNING - several libperl.a found, taking only the first one:",
+          "\n".join(matches))
+
   # matches[0] is a prefix of "location"
   # For the symlink, we want the relative path.
   rel_link = os.path.relpath(os.path.dirname(matches[0]), location)
@@ -24,4 +20,4 @@ def post_make_hook(options, buildout):
   if os.path.islink(simlink_location):
     os.unlink(simlink_location)
   os.symlink(rel_link, simlink_location)
-  print "Created symlink \"libs-c\" to", rel_link
+  print("Created symlink \"libs-c\" to", rel_link)