releng: automatically figure out if we should tag latest for docker

For example, when releasing from release-2.90, if `main` has a 2.91 tag
ancestor, we know that 2.91 was released, so we should *not* tag latest.

Change-Id: Ia56b17a2ee03bbec74b7c271c742858c690d450d

1 files changed, 1 insertions, 14 deletions

diff --git a/releng/create_release.xsh b/releng/create_release.xsh
index 6f4df2142..373c079bc 100644
--- a/releng/create_release.xsh
+++ b/releng/create_release.xsh
@@ -11,6 +11,7 @@ from .environment import RelengEnvironment
 from . import keys
 from . import docker
 from .version import VERSION, RELEASE_NAME, MAJOR
+from .gitutils import verify_are_on_tag, git_preconditions
 
 $RAISE_SUBPROC_ERROR = True
 $XONSH_SHOW_TRACEBACK = True
@@ -38,15 +39,6 @@ def setup_creds(env: RelengEnvironment):
     $AWS_ENDPOINT_URL = environment.S3_ENDPOINT
 
 
-def git_preconditions():
-    # verify there is nothing in index ready to stage
-    proc = !(git diff-index --quiet --cached HEAD --)
-    assert proc.rtn == 0
-    # verify there is nothing *stageable* and tracked
-    proc = !(git diff-files --quiet)
-    assert proc.rtn == 0
-
-
 def official_release_commit_tag(force_tag=False):
     print('[+] Setting officialRelease in flake.nix and tagging')
     prev_branch = $(git symbolic-ref --short HEAD).strip()
@@ -240,11 +232,6 @@ def prepare_release_notes():
     git commit -m @(commit_msg)
 
 
-def verify_are_on_tag():
-    current_tag = $(git describe --tag).strip()
-    assert current_tag == VERSION
-
-
 def upload_artifacts(env: RelengEnvironment, noconfirm=False, no_check_git=False, force_push_tag=False):
     if not no_check_git:
         verify_are_on_tag()