patman: add option for limiting the Cc list

Many mailing-lists consider a long Cc list a sign of spam and will
either drop the message or mark it for moderation. Because patman
automatically invokes get_maintainer.pl the Cc list can expand
unexpectedly. Allow the user to specify a limit for the Cc list.

This limit is applied after removing any known bouncing addresses. By
default no limit is applied.

Signed-off-by: Chris Packham <judge.packham@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

1 files changed, 4 insertions, 1 deletions

diff --git a/tools/patman/series.py b/tools/patman/series.py
index d526d4ee91..2735afaf88 100644
--- a/tools/patman/series.py
+++ b/tools/patman/series.py
@@ -202,7 +202,7 @@ class Series(dict):
             print(col.Color(col.RED, str))
 
     def MakeCcFile(self, process_tags, cover_fname, raise_on_error,
-                   add_maintainers):
+                   add_maintainers, limit):
         """Make a cc file for us to use for per-commit Cc automation
 
         Also stores in self._generated_cc to make ShowActions() faster.
@@ -215,6 +215,7 @@ class Series(dict):
             add_maintainers: Either:
                 True/False to call the get_maintainers to CC maintainers
                 List of maintainers to include (for testing)
+            limit: Limit the length of the Cc list
         Return:
             Filename of temp file created
         """
@@ -238,6 +239,8 @@ class Series(dict):
                 print(col.Color(col.YELLOW, 'Skipping "%s"' % x))
             cc = set(cc) - set(settings.bounces)
             cc = [m.encode('utf-8') if type(m) != str else m for m in cc]
+            if limit is not None:
+                cc = cc[:limit]
             all_ccs += cc
             print(commit.patch, ', '.join(set(cc)), file=fd)
             self._generated_cc[commit.patch] = cc