I have a large Git project which I would like to dissect into subprojects with their own repositories. Git's subtrees are ideal for this task: You first
create a branch with the contents of only one subfolder
git subtree split -P <name-of-folder> -b <name-of-new-branch>and then
pull this branch into another repository.
For a transitional phase, I would like to have the subprojects read-only and sync them from master. For every commit to master, I could of course perform the above procedure repeatedly for all subprojects, but this seems less then ideal since it does all the work all over again.
Is there a way to merge master into the subtree branches?