Question

i was wondering if there is a git command to see if a specific commit is in the current working tree. I have the shasign of the specific commit. I like to know if this commit is a commit done by another user in another working tree or if it’s commit which is newer then the current HEAD of my working tree.

The reason i want to do this is, because we have a Jenkins server set up and there are builds done regularly, but i want to test the latest build to see if it’s the same as my HEAD, or if it’s an older commit, or if it’s a commit done by someone else.

Answer 1

I think by “in the current working tree” you must mean “in the history of HEAD”.

To do the tests you describe, given the SHA1sum S, you can do the following:

• To see if S is the same as your HEAD, compare git rev-parse --verify S with git rev-parse --verify HEAD
• Otherwise, to see if it’s a commit in the history of HEAD, you can compare git merge-base S HEAD with git rev-parse --verify S. If they are the same, then S is an ancestor of HEAD.
• To see if it’s a commit “done by someone else”, you need to compare the authors of the two commits, which you could do by comparing git show -s --pretty='%an <%ae>' HEAD and git show -s --pretty='%an <%ae>' S