How to enable git-completion on PS1 variable

A nicer bash prompt I use includes a git completion script that indicates the branch of a repository I may be into. Like this:

git_completion

Green indicates “master” is clean and no modified files are present. Red indicates there is something new in that branch.

In order to configure that, I had to include some instructions on my .bashrc file. It looks like this:

# git completion
source /usr/share/git-core/contrib/completion/git-prompt.sh

(…)

PS1='\[\e[01;30m\]\t`if [ $? = 0 ]; then echo "\[\e[32m\] ✔ "; else echo "\[\e[31m\] ✘ "; fi`\[\e[00;40;37m\]\u\[\e[01;37m\]:`[[ $(git status 2> /dev/null | head -n2 | tail -n1) != "# Changes to be committed:" ]] && echo "\[\e[31m\]" || echo "\[\e[33m\]"[[ $(git status 2> /dev/null | tail -n1) != "nothing to commit, working directory clean" ]] || echo "\[\e[32m\]"`$(__git_ps1 "(%s)\[\e[00m\]")\[\e[01;34m\]\w\[\e[00m\]\$ '

Now, sometimes (in a new environment mostly), we may configure the .bashrc just the way we want it and then:

git_2

Boom! You see a big "__git_ps1: command not found"  message.

That is because you don’t have the git-prompt.sh file you included in the directory loaded at the top of you .bashrc file (the /usr/share/git-core/contrib/completion/git-prompt.sh)

So in order to get rid of that, we need to include it. The file is available in contrib/completion/git-prompt.bash from the git repository git://git.kernel.org/pub/scm/git/git.git

So after you clone it, you should simply copy the missing files to your system file system. In my case, I preferred to copy the whole “completion” dir to my file systems, as I did not have it. So:

$ sudo cp -r completion/ /usr/share/git-core/contrib/

Now I have my git-completion.bash file in the correct place. Let’s see if that worked when running a new bash session:

git_3

Great! Worked like a charm.

Let me know if you have a different solution for it or if this did not solve your problem.

Thanks for reading.

Cheers!

Technically Speaking was used as a reference for this post.

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