Tentative suport for sending exploded series

I've been working on a way to automatically convert pull requests into
series, complete with mailing them out to arbitrary destinations. This
would allow folks to send a pull request to a dedicated list and have it
automatically converted into a well-formed series.

This is a tentative implementation that relies on git-send-email to do
most of the heavy lifting. I have misgivings about using git-send-email
for this purpose, but it does reduce the amount of duplicated code we
would have otherwise had to write, and allows us to hook into things
like tocmd/cccmd, etc.

For example, adding the following to your .git/config:

    [sendemail "autopr"]
        smtpserver = [your.server.here]
        smtpserverport = 587
        smtpencryption = tls
        smtpuser = [your-user]
        smtppass = [your-pass]
        transferEncoding = 8bit
        suppressFrom = yes
        confirm = never
        validate = no
        tocmd = "$(git rev-parse --show-toplevel)/scripts/get_maintainer.pl --norolestats --nol"
        cccmd = "$(git rev-parse --show-toplevel)/scripts/get_maintainer.pl --norolestats --nom"

This would allow doing the following:

    b4 pr -e -f "AutoPR Exploder <autopr@yourdomain.here>" -s autopr [--dry-run]

The pull request will be exploded into a patch series and sent to all
the proper destinations as returned by get_maintainer.pl. We construct
the message headers in a way that allow regular code review and "b4 am"
usage after the auto-exploded series is sent out.

If testing goes well, we'll implement this as a kernel.org service and
then hook a similar implementation via Gitlab/Github.

Signed-off-by: Konstantin Ryabitsev <konstantin@linuxfoundation.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/b4/command.py b/b4/command.py
index 3f130c8..2d6994d 100644
--- a/b4/command.py
+++ b/b4/command.py
@@ -160,6 +160,11 @@ def cmd():
                        help='Attempt to retrieve any Link: URLs (use with -e)')
     sp_pr.add_argument('-f', '--from-addr', dest='mailfrom', default=None,
                        help='Use this From: in exploded messages (use with -e)')
+    sp_pr.add_argument('-s', '--send-as-identity', dest='sendidentity', default=None,
+                       help=('Use git-send-email to send exploded series (use with -e);'
+                             'the identity must match a [sendemail "identity"] config section'))
+    sp_pr.add_argument('--dry-run', dest='dryrun', action='store_true', default=False,
+                       help='Force a --dry-run on git-send-email invocation (use with -s)')
     sp_pr.add_argument('msgid', nargs='?',
                        help='Message ID to process, or pipe a raw message')
     sp_pr.set_defaults(func=cmd_pr)