[execo_engine] add an optional separator to slugify

src/execo_engine/utils.py

@@ -89,9 +89,8 @@ def copy_outputs(stdout_filename, stderr_filename):
     # and 0 as the buffer size (unbuffered)
     sys.stdout = os.fdopen(sys.stdout.fileno(), 'w', 1 if sys.version_info >= (3,) else 0)
 
-def slugify(value):
-    """
-    Normalizes string representation, converts to lowercase, removes
+def slugify(value, separator='-'):
+    """Normalizes string representation, converts to lowercase, removes
     non-alpha characters, and converts spaces to hyphens.
 
     Intended to convert any object having a relevant string
@@ -99,15 +98,22 @@ def slugify(value):
 
     more or less inspired / copy pasted from django (see
     http://stackoverflow.com/questions/295135/turn-a-string-into-a-valid-filename-in-python)
+
+    :param value: the object to slugify
+
+    :param separator: a character to use as separator in the string
+      output, instead of the default '-'. Be careful to only use one
+      character and only characters which don't have special meaning
+      in regular expressions.
     """
     if sys.version_info >= (3,):
         value = str(value)
         value = unicodedata.normalize('NFKD', value).encode('ascii', 'ignore').decode('ascii')
         value = re.sub('[^\w\s-]', '', value).strip().lower()
-        value = re.sub('[-\s]+', '-', value)
+        value = re.sub('[' + separator + '\s]+', separator, value)
     else:
         value = unicode(str(value))
         value = unicodedata.normalize('NFKD', value).encode('ascii', 'ignore')
         value = unicode(re.sub('[^\w\s-]', '', value).strip().lower())
-        value = unicode(re.sub('[-\s]+', '-', value))
+        value = unicode(re.sub('[' + separator + '\s]+', separator, value))
     return value