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I have created a few aliases for git in zsh, for example gch = git checkout, grb = git rebase --committer-date-is-author-date and some more complex useful zsh functions for git commands. But how can I allow these aliases to use zsh git autocompletion?

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    What happens when you remove oh-my-zsh and instead just zsh -f and then autoload -U compinit and then compinit and then create the aliases? – thrig Jan 5 '17 at 18:36
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If you open the file which contains the autoloaded function defintion for git completion:
On my ubuntu system, its:

/usr/share/zsh/functions/Completion/Unix/_git

at the top of the file you will see the #compdef declaration

#compdef git git-cvsserver git-receive-pack git-upload-archive git-upload-pack git-shell gitk tig

you can try adding your aliases to the #compdef definition, e.g.

#compdef git git-cvsserver git-receive-pack [...] tig gch grb
                                                      ^^^ ^^^

Then starting a new shell to get that new directive loaded.
Then try invoking completion.

What is /usr/share/zsh/functions/Completion/Unix/_git?

Its the file that contains the autoloaded "function" defining the completion behaviour for the all the commands defined in the #compdef directive, in this case the git family of commands, it lives in fpath and is autoloaded by compinit when the completion system is initialized.

What is #compdef ?

from man zshcompsys

#compdef name ... [ -{p|P} pattern ... [ -N name ... ] ]
The file will be made autoloadable and the function defined in it will be called when completing names, each of which is either the name of a command whose arguments are to be completed or one of a number of special contexts in the form -context- described below.

  • Is there a nicer way to make this happen so it can fit into my dotfiles? – Patrick Artounian Jan 8 '17 at 21:24
  • yes there are other ways to script this out but did this work for you? I guess there is no point bothering with improving on this solution if it fundamentally didnt work in the first place. – the_velour_fog Jan 8 '17 at 21:27
  • Just tried it and no dice. I apologize for rushing into things. – Patrick Artounian Jan 8 '17 at 21:50
  • @patrick oh ok sorry. it works for me with functions, however I dont use aliases anymore so I couldnt test on my system – the_velour_fog Jan 8 '17 at 21:54
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I've done something very similar. Are you using oh-my-zsh? If so, make sure you've enabled the zsh-completions plugin in your .zshrc file. I'd also recommend the zsh-autosuggestions plugin.

Once you've done that, you'll need to add the following to your .zshrc file (if it's not already there)

fpath=(~/.zsh/completions $fpath)
autoload -U compinit && compinit
  • Yes, I am oh-my-zsh and I also already have that in the zshrc. – Patrick Artounian Jan 8 '17 at 21:21

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