ez: refactor based on initial feedback

Significant refactor of (formerly) "b4 submit" based on initial
feedback:

1. Split "b4 submit" into three different commands:

  - ez-series: for managing the series cover letters, tracking info, etc
  - ez-trailers: for retrieving trailers and updating commits (works on
  any branch, not just ez-series branches)
  - ez-send: for sending branches managed by ez-series

2. Refactor to support multiple cover letter strategies:

  - the default "commit" strategy that keeps the cover letter in an
  empty commit (should be backwards-compatible with "b4 submit")
  - the non-invasive "branch-description" strategy that keeps the cover
  letter in the branch.branchname.description configuration setting and
  tracking in branch.branchname.b4-tracking
  - the not-yet-implemented "tag" strategy that mimics the behaviour of
  git-publish

  The strategy can be set via b4.ez-cover-strategy variable, e.g. in
  your .gitconfig:

  [b4]
    ez-cover-strategy = branch-description

  Note, that converting from one strategy to another doesn't work and
  will probably explode in weird ways right now.

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

1 files changed, 6 insertions, 0 deletions

diff --git a/b4/__init__.py b/b4/__init__.py
index b3aa84f..6adabbd 100644
--- a/b4/__init__.py
+++ b/b4/__init__.py
@@ -2008,6 +2008,12 @@ def in_directory(dirname):
         os.chdir(cdir)
 
 
+def git_set_config(fullpath: Optional[str], param: str, value: str, operation: str = '--replace-all'):
+    args = ['config', operation, param, value]
+    ecode, out = git_run_command(fullpath, args)
+    return ecode
+
+
 def get_config_from_git(regexp: str, defaults: Optional[dict] = None, multivals: Optional[list] = None) -> dict:
     if multivals is None:
         multivals = list()