Log commits added to master in last 24 hours

Question

I am trying to show commits (excluding merge commits) which were added to the master branch in the last 24 hours. Currently i am using this command for that:

git log --format=format:%s --no-merges --since='24 hours ago'

However this has a problem: if a commit is older than 24 hours, but merged into the master branch in the last 24 hours, the command will not list the commit. Is it possible to show commits added to the master branch in last 24 hours, and not commits created in last 24 hours?

Please note i execute this in a clean CI workspace, so git reflog cannot help me.

Thanks in advance!

Answer 1

I think rev-list is what you want.

Try this:

git rev-list --no-merges '^<24-hour-old-commit>' HEAD

That should list all the non-merge commits that are reachable from commit HEAD, but not reachable from from commit <24-hour-old-commit>.

For example, in this revision graph, it'll list the upper case commits, but not lower case:

a - b - c - 24h - H - i - J - K - HEAD
     \               /
      D - E - F - G '

Commits H, J, K, and HEAD are all younger than 24 hours old. Commit i is also younger, but is omitted as it is a merge commit. Commits D, E, F, and G may be any age, but have only been merged within the last 24 hours, so they are listed also.

---

Within the above command, --max-age or --since options will have the same problem as you have with git log, but they can be used to find <24-hour-old-commit> for you:

git rev-list -n1 --before="24 hours" --first-parent HEAD

That is, "give only 1 commit ID, that must be at least 24 hours old, and is on the current branch".

Putting it all together:

git rev-list --no-merges HEAD \
             --not $(git rev-list -n1 --before="24 hours" --first-parent HEAD)

(Note: --not abcdef is another way to say ^abcdef except that it applies to all following arguments, hence reordering the options.)

The default output of rev-list is just raw revisions, but you can make it more like git log using the --pretty option. --pretty=short is approximately the same as you're used to.