GitHub中分支的分支能否合并/变基？协作场景实操问询

Great questions—let’s walk through each one based on your GitFlow setup and permissions:

1. Can the other developer create a PR for feature/23456 → develop? #

Yes, absolutely. Here’s why:

• Your teammate has permission to push their own feature branches to the repository (they already pushed feature/12345, so this is confirmed).
• Creating a pull request only requires that the contributor has a branch in the repository to target against develop. Their "read-only" permission on develop only prevents them from directly pushing to or merging into develop—not from opening a PR.
• That said, they won’t be able to merge the PR themselves; only you (with write access to develop) can approve and complete the merge.

2. Will this "branch of a branch" scenario cause issues on GitHub? #

Nope, GitHub fully supports nested feature branches like this. The only thing to watch out for is merge conflicts once you’ve merged feature/12345 into develop—since feature/23456 is based on an older version of feature/12345, it won’t automatically have the updates from develop.

Once your teammate pulls the latest develop into feature/23456 (either via rebase or merge), GitHub will correctly show the PR diff as only the changes unique to feature/23456 (not the already-merged feature/12345 code). No weird GitHub-specific bugs or limitations here—this is a common workflow for parallel development.

3. Should you merge directly, or use rebase? What commands are needed? #

This depends on your team’s preference for commit history, but rebase is usually cleaner for feature branches in GitFlow (since it keeps the develop branch history linear). Here’s the step-by-step for your teammate to handle this:

If you choose rebase (recommended for linear history): #

1. First, have your teammate fetch the latest develop (with your merged feature/12345 changes):

   git checkout develop
   git pull origin develop
   

2. Switch back to their feature branch and rebase it onto the latest develop:

   git checkout feature/23456
   git rebase develop
   

3. If conflicts arise during rebase (which is likely), they’ll need to:
   • Open the conflicted files, resolve the differences
   • Stage the fixed files: git add <resolved-file>
   • Continue the rebase: git rebase --continue
   • (If they need to abort the rebase entirely: git rebase --abort)
4. Since rebasing rewrites the branch’s commit history, they’ll need to force-push the updated branch to GitHub—use --force-with-lease instead of plain --force to avoid accidentally overwriting any unexpected changes:

   git push origin feature/23456 --force-with-lease
   

5. Once the PR is updated with the rebased branch, you can merge it into develop (this will be a fast-forward merge if no new changes were added to develop in the meantime).

If you prefer to merge instead (for preserving branch history): #

If your team wants to keep explicit merge commits showing the parallel development, your teammate can merge develop into their feature branch instead:

1. Fetch latest develop:

   git checkout develop
   git pull origin develop
   

2. Merge develop into feature/23456:

   git checkout feature/23456
   git merge develop
   

3. Resolve any conflicts, stage the files, and commit the merge:

   git add <resolved-file>
   git commit  # Git will auto-generate a merge commit message
   

4. Push the updated branch normally (no force push needed):

   git push origin feature/23456
   

5. You can then merge the PR into develop—this will add another merge commit to the history.

Either approach works; rebase just leads to a cleaner, more linear commit history on develop.

内容的提问来源于stack exchange，提问作者smeeb