Indicate whether 'git send-email' was actually called, so that we don't
bother waiting for patchwork to receive our series if it wasn't.

The 'git send-email' seems to always return a code of 0 even if nothing
was sent, so we cannot use clues there. Ideally we would watch the
output to determine which patches were sent and which not, but that is
left for another day.

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

Since str() is a reserved function we should not use it as a variable.
Fix this in the send module.

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

Support specifying the git-directory when creating and sending patches.
This will allow better testing of this functionality, since we can use a
test directory.

For count_commits_to_branch() support an end commit while we are here.

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

Plumb a current-working-directory (cwd) through from send all the way to
the command gitutil libraries. This will allow better testing of this
functionality, since we can use a test directory.

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

Instead of using settings.alias pass this value in. This allows tests to
work without using settings.alias

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

Rather than accessing settings directly, pass the aliases in, so that
we can do the same from tests. With further work this will allow the
tests to work without using settings.alias

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

Rather than accessing the settings module in this function, require the
alias dict to be passed in.

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

The control module includes much of the implementation of patman's
'send' feature. As a first step to separating this out, move the sending
code into its own file.

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