I'm using go
as a simple bash alias for git checkout branchname
. The thing that I miss is the autocomplete feature that works with the full git checkout branchna...
command, but not in the alias.
Is there a way to instruct Bash to "inherit" the autocomplete "driver" for another command?
After using complete -F
:
complete -F _git_checkout go
Tabbing after go
may result in:
bash: [: 1: unary operator expected
complete
, use __git_complete
This is git bash completion's built-in function for this purpose.
After declaring your alias, bind the correct auto-complete function to it:
# Main git completions (prior to git 2.30, you an use _git instead of __git_main)
alias g="git"
__git_complete g __git_main
alias go="git checkout"
__git_complete go _git_checkout
alias gp="git push"
__git_complete gp _git_push
If you can find out the completion function used by the original command, you can assign it to the alias using complete -F
.
For example, on my ubuntu box, the completion function used by git checkout
is _git_checkout
(found in /etc/bash_complete.d/git
).
Before running complete -F
:
[me@home]$ git checkout <TAB><TAB>
HEAD master origin/HEAD origin/master
[me@home]$ alias go="git checkout"
[me@home]$$ go <TAB><TAB>
.git/ precommit_config.py README.md SvnSentinel/
.gitignore precommit.py startcommit.py tests/
After:
[me@home]$$ complete -F _git_checkout go
[me@home]$$ go <TAB><TAB>
HEAD master origin/HEAD origin/master
On Ubuntu 18.04 (Bionic) the following works. Add something like this snippet (with your aliases) to your preferred bash configuration file eg .bashrc
, .bash_aliases
.bash_profile
.
# define aliases
alias gc='git checkout'
alias gp='git pull'
# setup autocompletion
if [ -f "/usr/share/bash-completion/completions/git" ]; then
source /usr/share/bash-completion/completions/git
__git_complete gc _git_checkout
__git_complete gp _git_pull
else
echo "Error loading git completions"
fi
In general the format of the __git_complete
directive is the following:
__git_complete <YOUR ALIAS> _git_<GIT COMMAND NAME>
This combines wisdom from the existing answers in a single up-to-date answer, thank you all.
In Ubuntu 16.04.3 LTS, the file I needed to source was /usr/share/bash-completion/completions/git
. So in .bash_custom
(or .bashrc, whatever):
[ -f /usr/share/bash-completion/completions/git ] && . /usr/share/bash-completion/completions/git
__git_complete g __git_main
To add to other excellent answers: normally you have a lot of Git aliases and it may be tedious to manually forward completions for all of them. Here's a small trick to do this automatically:
if [ -f "/usr/share/bash-completion/completions/git" ]; then
# Enable Git completions for aliases
. /usr/share/bash-completion/completions/git
for a in $(alias | sed -n 's/^alias \(g[^=]*\)=.git .*/\1/p'); do
c=$(alias $a | sed 's/^[^=]*=.git \([a-z0-9\-]\+\).*/\1/' | tr '-' '_')
if set | grep -q "^_git_$c *()"; then
eval "__git_complete $a _git_$c"
fi
done
fi
As somebody else answered you should use __git_complete
, otherwise the script will fail.
alias g="git"
__git_complete g __git_main
alias g="gl"
__git_complete gl _git_log
But you shouldn't use _git
for the main command, it's __git_main
.
Unfortunately a lot of information about the completion is hidden, but you can find more on the README of my fork: git-completion .
On Linux Mint, the accepted answer didn't work for me. I was getting bash: [: 1: unary operator expected
.
I found the following linked response worked quite well - with the troubleshooting section the user provided to be quite helpful. https://superuser.com/questions/436314/how-can-i-get-bash-to-perform-tab-completion-for-my-aliases
I realize you're specifically asking about bash aliases, but for those coming here looking for autocomplete in bash for complex git aliases, see here .
In particular:
# 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 ; ... '".
For macOS
, run the following to install bash completion
brew install bash-completion
Then add the following
[[ -r "/usr/local/etc/profile.d/bash_completion.sh" ]] && . "/usr/local/etc/profile.d/bash_completion.sh"
to your .bashrc or .bash_profile
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