[layerindex-web][PATCH 1/3] layerindex/utils.py: add is_commit_ancestor check


Tim Orling
 

Add a helper function to check if a given SHA1 hash is an ancestor in
the currently checkout out branch, using:

git merge-branch --is-ancestor <commit> HEAD

NOTE: This will not match commits which have been cherry-picked.

Signed-off-by: Tim Orling <tim.orling@...>
---
layerindex/utils.py | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)

diff --git a/layerindex/utils.py b/layerindex/utils.py
index 32be16d..46e109e 100644
--- a/layerindex/utils.py
+++ b/layerindex/utils.py
@@ -229,6 +229,28 @@ def explode_dep_versions2(bitbakepath, deps):
import bb.utils
return bb.utils.explode_dep_versions2(deps)

+def is_commit_ancestor(repodir, commit, logger):
+ """
+ Check if the given SHA1 hash is an ancestor in the currently checked out branch.
+ NOTE: This will not match commits which have been cherry-picked.
+ """
+ try:
+ # check if commit is a sha1 hash
+ if re.match('[0-9a-f]{40}', commit):
+ # check if the commit is an ancestor
+ contained = runcmd(['git', 'merge-base', '--is-ancestor', '%s' % commit, 'HEAD'], repodir, logger=logger)
+ return True
+ else:
+ raise Exception('is_commit_ancestor: "commit" must be a SHA1 hash')
+ except CalledProcessError as e:
+ if e.returncode == 1:
+ # commit is not an ancestor
+ return False
+ else:
+ raise e
+ except Exception as esc:
+ logger.warn(esc)
+
def checkout_repo(repodir, commit, logger, force=False):
"""
Check out a revision in a repository, ensuring that untracked/uncommitted
--
2.32.0