[issue1669] allow setting username and message with transplant extension

[James C. McPherson]

New submission from James C. McPherson <jmcp at opensolaris.org>:

While working on some mechanics for the OpenSolaris ON gate, I came across
a need to write something very similar to the transplant extension. The
extension as it stands at the moment doesn't allow you to force use of a 
specific username for changeset comments, nor does it really allow you to
for use of a specific message for those comments. I've got a diff of changes
that I've made which allow this to work.

Summary of changes is as follows:

(1) added a --username USERNAME option, to set the username used
    for the changeset comments as transplanted into current repo
(2) added a --message MESSAGE option, to force the message used
    to the changeset comments that are transplanted into the current
    repo.
(3) added code to turn _off_ the --filter option iff --message is
    specified as well.
(4) added pydoc for the new options and behaviour



Tested with the following:

== zfs snapshotted workspace of onnv_111
=== hg transplant -s /export/onnv-clone (revision)
(rollback)
=== hg transplant --username "jmcp <James.McPherson at Sun.COM>" \
	-s /export/onnv-clone (revision)
(rollback)
=== hg transplant --username "jmcp <James.McPherson at Sun.COM>" \
	--message "Respin CR into onnv_111b" -s /export/onnv-clone (revision)
(rollback)
=== hg transplant --message "Respin CR into onnv_111b" \
	-s /export/onnv-clone (revision)
(rollback)
=== hg transplant --message "Respin CR into onnv_111b" \
	--filter ./filtername -s /export/onnv-clone (revision)
{{message about disabling filter, then applied with message}}

----------
files: transplant.py.diff
messages: 9373
nosy: jmcp
priority: wish
status: in-progress
title: allow setting username and message with transplant extension

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Mercurial issue tracker <mercurial-bugs at selenic.com>
<http://www.selenic.com/mercurial/bts/issue1669>
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