Git flow - create feature branch off another feature branch
As I understood, gitflow is quite abandoned.
gitflow-avh replaces it and offers this feature (see https://github.com/petervanderdoes/gitflow#creating-featurereleasehotfixsupport-branches).
I just try it and it works well to me.
git flow feature start PROJ-511 feature/PROJ-500
git flow feature finish PROJ-511
PROJ-511 was merged into feature/PROJ-500.
You can create a sub-feature branch via
git flow feature start PROJ-511 feature/PROJ-500
But you cannot use the GitFlow tool to merge the branch back into the main feature branch because if you do
git flow feature finish PROJ-511
the feature will be merged into develop. Ergo sub-features are not supported, you need to do it manually.
Alternatives: The requirement is not new, though. There is an open issue as well as a fork project claiming to support finishing features into branches other than develop. I also found a pull request with an implementation of that feature. You might want to try that modification and see if you are happy with it.
Update 2019-12-13: As user Matěj Kříž just mentioned in his comment, user Tony Chemit has written an answer here a few months after mine, pointing to gitflow-avh as an alternative to the original gitflow product. It supports sub-features out of the box with the syntax shown above. Some years have passed by and nowadays the AVH edition is part of the normal installation of Git for Windows, I just verified this on my local box and tested the sub-feature option. I.e. for Windows users it just works right after Git installation.