[modutils] don't propagate IOError when package's __init__.py file doesn't exist. Closes #174606

2 files changed, 15 insertions, 7 deletions

diff --git a/ChangeLog b/ChangeLog
index ffb718e..b1614dc 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,6 +1,10 @@
 ChangeLog for logilab.common
 ============================
 
+--
+   * modutils: don't propagate IOError when package's __init__.py file doesn't
+     exist (#174606)
+
 2013-07-26  --  0.60.0
     * configuration: rename option_name method into option_attrname (#140667)
 
diff --git a/modutils.py b/modutils.py
index 9d0bb49..e9615d5 100644
--- a/modutils.py
+++ b/modutils.py
@@ -656,14 +656,18 @@ def _module_file(modpath, path=None):
                                                           '.'.join(imported)))
             # XXX guess if package is using pkgutil.extend_path by looking for
             # those keywords in the first four Kbytes
-            data = open(join(mp_filename, '__init__.py')).read(4096)
-            if 'pkgutil' in data and 'extend_path' in data:
-                # extend_path is called, search sys.path for module/packages of this name
-                # see pkgutil.extend_path documentation
-                path = [join(p, modname) for p in sys.path
-                        if isdir(join(p, modname))]
-            else:
+            try:
+                data = open(join(mp_filename, '__init__.py')).read(4096)
+            except IOError:
                 path = [mp_filename]
+            else:
+                if 'pkgutil' in data and 'extend_path' in data:
+                    # extend_path is called, search sys.path for module/packages
+                    # of this name see pkgutil.extend_path documentation
+                    path = [join(p, modname) for p in sys.path
+                            if isdir(join(p, modname))]
+                else:
+                    path = [mp_filename]
     return mtype, mp_filename
 
 def _is_python_file(filename):