How to create completion for `git flow feature checkout` alias?

Question

I have configured my .bash_aliases like:

alias gc="git checkout"
alias gcf="git flow feature checkout"
source ~/.git-completion.bash
__git_complete gc  _git_checkout
source ~/.git-flow-completion.bash
__git_complete gcf __git_flow_feature

But when I try to complete I should select checkout and then I may select my branch:

$ gcf 
checkout   diff       help       publish    rebase     track      
delete     finish     list       pull       start      

$ gcf checkout a
a_branch1 a_branch2

What should I do that checkout will be selected automatically when I write gcf+aTAB

Answer 1

I think one solution might lie with custom Git alias completion:

If you use complex aliases of form !f() { ... }; f, you can use the null command : as the first command in the function body to declare the desired completion style. For example !f() { : git commit ; ... }; f will tell the completion to use commit completion. This also works with aliases of form !sh -c '...'. For example, !sh -c ': git commit ; ... '.

So you'll first need to set up a Git alias in your .gitconfig:

[alias]
  ffc = "!ffc() { : git checkout ; git flow feature checkout $@ ; } && ffc"

and then link it in .bash_aliases:

alias gcf="git ffc"

It's untested but I think it'll do what you want. You might have some trouble with spacing in the $@ in the ffc alias that \"$@\" might fix depending on use case.