patman: Use Patch-cc: instead of Cc:

Add a new Patch-cc: tag which performs the service now provided by
the Cc: tag. The Cc: tag is interpreted by git send-email but
ignored by patman.

So now:

  Cc: patman does nothing. (git send-email can cc patches)
  Patch-cc: patman Cc's patch and removes this tag from the patch

Signed-off-by: Simon Glass <sjg@chromium.org>

tools/patman/README

@@ -217,8 +217,10 @@ Series-changes: n
 	to update the log there and then, knowing that the script will
 	do the rest.
 
- Cc: Their Name <email>
-	This copies a single patch to another email address.
+Patch-cc: Their Name <email>
+	This copies a single patch to another email address. Note that the
+	Cc: used by git send-email is ignored by patman, but will be
+	interpreted by git send-email if you use it.
 
 Series-process-log: sort, uniq
 	This tells patman to sort and/or uniq the change logs. It is
@@ -246,8 +248,9 @@ Where Patches Are Sent
 
 Once the patches are created, patman sends them using git send-email. The
 whole series is sent to the recipients in Series-to: and Series-cc.
-You can Cc individual patches to other people with the Cc: tag. Tags in the
-subject are also picked up to Cc patches. For example, a commit like this:
+You can Cc individual patches to other people with the Patch-cc: tag. Tags
+in the subject are also picked up to Cc patches. For example, a commit like
+this:
 
 >>>>
 commit 10212537b85ff9b6e09c82045127522c0f0db981
@@ -258,16 +261,16 @@ Date:	Mon Nov 7 23:18:44 2011 -0500
 
     This should make sending out e-mails to the right people easier.
 
-    Cc: sandbox, mikef, ag
-    Cc: afleming
+    Patch-cc: sandbox, mikef, ag
+    Patch-cc: afleming
 <<<<
 
 will create a patch which is copied to x86, arm, sandbox, mikef, ag and
 afleming.
 
-If you have a cover letter it will get sent to the union of the CC lists of
-all of the other patches. If you want to sent it to additional people you
-can add a tag:
+If you have a cover letter it will get sent to the union of the Patch-cc
+lists of all of the other patches. If you want to sent it to additional
+people you can add a tag:
 
 Cover-letter-cc: <list of addresses>
 

tools/patman/patchstream.py

@@ -36,7 +36,7 @@ re_series_tag = re.compile('^Series-([a-z-]*): *(.*)')
 re_commit_tag = re.compile('^Commit-([a-z-]*): *(.*)')
 
 # Commit tags that we want to collect and keep
-re_tag = re.compile('^(Tested-by|Acked-by|Reviewed-by|Cc): (.*)')
+re_tag = re.compile('^(Tested-by|Acked-by|Reviewed-by|Patch-cc): (.*)')
 
 # The start of a new commit in the git log
 re_commit = re.compile('^commit ([0-9a-f]*)$')
@@ -267,7 +267,7 @@ class PatchStream:
             if (tag_match.group(1) == 'Tested-by' and
                     tag_match.group(2).find(os.getenv('USER') + '@') != -1):
                 self.warn.append("Ignoring %s" % line)
-            elif tag_match.group(1) == 'Cc':
+            elif tag_match.group(1) == 'Patch-cc':
                 self.commit.AddCc(tag_match.group(2).split(','))
             else:
                 self.tags.append(line);