[PATCH] Add setting to specify subject prefixes to ignore

[Ali Alnubani]

The only prefix that was being ignored was the project.linkname.
This patch adds the new setting: `SUBJECT_PREFIXES_TO_IGNORE`,
which can be a list of strings to be removed from the subject
by the parser.

Suggested-by: Thomas Monjalon <thomas at monjalon.net>
Signed-off-by: Ali Alnubani <alialnu at mellanox.com>
---
 docs/deployment/configuration.rst | 7 +++++++
 patchwork/parser.py               | 9 +++++++--
 patchwork/settings/base.py        | 3 +++
 3 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/docs/deployment/configuration.rst b/docs/deployment/configuration.rst
index 0601276..4f718e9 100644
--- a/docs/deployment/configuration.rst
+++ b/docs/deployment/configuration.rst
@@ -112,5 +112,12 @@ Force use of ``https://`` links instead of guessing the scheme based on current
 access. This is useful if SSL protocol is terminated upstream of the server
 (e.g. at the load balancer)
 
+``SUBJECT_PREFIXES_TO_IGNORE``
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Case-insensitive prefixes to remove from patch subjects.
+
+.. versionadded:: 2.2
+
 __ https://docs.djangoproject.com/en/1.8/ref/settings/
 __ http://www.django-rest-framework.org/api-guide/settings/
diff --git a/patchwork/parser.py b/patchwork/parser.py
index c7297ae..b508616 100644
--- a/patchwork/parser.py
+++ b/patchwork/parser.py
@@ -14,6 +14,7 @@ from fnmatch import fnmatch
 import logging
 import re
 
+from django.conf import settings
 from django.contrib.auth.models import User
 from django.db.utils import IntegrityError
 from django.utils import six
@@ -37,6 +38,8 @@ list_id_headers = ['List-ID', 'X-Mailing-List', 'X-list']
 
 SERIES_DELAY_INTERVAL = 10
 
+SUBJECT_PREFIXES_TO_IGNORE = settings.SUBJECT_PREFIXES_TO_IGNORE
+
 logger = logging.getLogger(__name__)
 
 
@@ -278,7 +281,8 @@ def _find_series_by_markers(project, mail, author):
     """
 
     subject = mail.get('Subject')
-    name, prefixes = clean_subject(subject, [project.linkname])
+    SUBJECT_PREFIXES_TO_IGNORE.append(project.linkname)
+    name, prefixes = clean_subject(subject, SUBJECT_PREFIXES_TO_IGNORE)
     _, total = parse_series_marker(prefixes)
     version = parse_version(name, prefixes)
 
@@ -973,7 +977,8 @@ def parse_mail(mail, list_id=None):
     msgid = msgid[:255]
 
     subject = mail.get('Subject')
-    name, prefixes = clean_subject(subject, [project.linkname])
+    SUBJECT_PREFIXES_TO_IGNORE.append(project.linkname)
+    name, prefixes = clean_subject(subject, SUBJECT_PREFIXES_TO_IGNORE)
     is_comment = subject_check(subject)
     x, n = parse_series_marker(prefixes)
     version = parse_version(name, prefixes)
diff --git a/patchwork/settings/base.py b/patchwork/settings/base.py
index 15644b4..f5b3ab8 100644
--- a/patchwork/settings/base.py
+++ b/patchwork/settings/base.py
@@ -227,3 +227,6 @@ COMPAT_REDIR = True
 # the scheme based on current access. This is useful if SSL protocol
 # is terminated upstream of the server (e.g. at the load balancer)
 FORCE_HTTPS_LINKS = False
+
+# Case-insensitive prefixes to remove from patch subjects
+SUBJECT_PREFIXES_TO_IGNORE=[]
-- 
2.11.0