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If I do this:

alias g='git'

I loose all completion rules (i.e. branches and remotes are no longer being automatically completed when I hit TAB after typing, for example g push o).

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While I don't have an answer for you, I'm going to have to take a minute and wonder if not typing those two other letters is really giving you much of an advantage? –  Marco Ceppi Sep 19 '11 at 13:17
Sure it does! I'm typing 'g' probably over a 100 times a day. –  Paweł Gościcki Sep 19 '11 at 13:29
Aliasing often-used short commands to even shorter aliases saves me hundreds of keypresses a day. According to my shell history, I have used the alias g=git 756 times in the past month, meaning I saved pressing the 'g' and 'i' keys 1512 times total. That, combined with my git aliases, probably saves me tens of thousands of key presses a month. –  Evan Teitelman Dec 12 '12 at 1:56
The main point of shortening keystrokes is helping your hands keep up with your brain. –  Tyler Collier Feb 26 at 23:37

3 Answers 3

up vote 8 down vote accepted

Copying and modifying opportunely from /etc/bash_completion.d/git, add the following lines to your ~/.bashrc:

complete -o bashdefault -o default -o nospace -F _git g 2>/dev/null \
    || complete -o default -o nospace -F _git g
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Ha! Wunderbar! Works just like it should :) –  Paweł Gościcki Sep 19 '11 at 13:32
I also had to add source /usr/share/bash-completion/completions/git to my .bashrc –  pcx Aug 21 '14 at 6:46

In ~/.bashrc:

alias g='git'
source /usr/share/bash-completion/completions/git
complete -o default -o nospace -F _git g

Via http://29a.ch/2013/8/9/fixing-bash-autocomplete-on-ubuntu-13-04

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The updated way to do this (complete wouldn't work for me):

  1. cd - switch to your home directory
  2. wget https://raw.github.com/git/git/master/contrib/completion/git-completion.bash
  3. Add source ~/git-completion.bash to your .bashrc file (if you don't have this file make one in your home folder, bash will look for it automatically)
  4. Add alias g='git'to your .bashrc file.
  5. Start a new session or source your changes with source ~/.bashrc
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