Git Rebase

Git Rebase (Non-Interactive)

Since git rebase -i requires an interactive editor, use GIT_SEQUENCE_EDITOR to supply the todo list via a script:

1. Updating the HEAD commit: If the commit you need to modify is already at HEAD, just use git commit --amend directly. The fixup+rebase workflow below is only needed for non-HEAD commits.

2. Squashing fixups into existing commits: Create fixup commits with git commit --fixup=<target-hash>, then write a shell script that outputs the desired todo (with pick and fixup lines in order) and run:

   GIT_SEQUENCE_EDITOR=/path/to/todo-script.sh git rebase -i <base>
   

   Note: --autosquash alone without -i does not reorder or squash anything.

3. Rewording commit messages: Use git format-patch to export commits as patch files, edit the message headers in the patch files, then reapply:

   git format-patch <base> -o /tmp/patches/
   # Edit the commit message in each /tmp/patches/000N-*.patch file
   # (the message is between the Subject: line and the --- line)
   git reset --hard <base>
   git am /tmp/patches/*.patch