How to use function on git-prompt on Git Bash for Windows?

Question

I want to use the last exit code to customize my bash prompt. So following this question I should add $? inside a function:

PROMPT_COMMAND=__prompt_command

__prompt_command() {
    local EXIT="$?"
    ...

I tried many times, but whenever I add a function on my C:\Program Files\Git\etc\profile.d\git-prompt.sh file, Git Bash can't run this file, and it doesn't use it.

Is there a way to use a function on git-prompt.sh on Git Bash for Windows, or another approach to use the last exit code to customize the bash prompt?

Can't you put this in your `~/.bashrc`? It might work if you put it in your `~/.bashrc`. — Shane Bishop, Feb 26 '21 at 15:08
@ShaneBishop Since the prompt configuration is written in `git-prompt.sh`, I think that writing into `~/.bashrc` won't work, since it isn't used by the prompt — macabeus, Feb 26 '21 at 15:50
I just tested using `~/.bashrc` and it works. See my answer below. — Shane Bishop, Feb 26 '21 at 16:17

score 1 · Accepted Answer · answered Feb 26 '21 at 16:16

Follow these instructions to configure your git-bash prompt.

First, open git-bash, and cd to your ~ directory.

Using vim or nano, edit your ~/.bash_profile file to contain the following two lines:

test -f ~/.profile && . ~/.profile
test -f ~/.bashrc && . ~/.bashrc

Then create a ~/.bashrc file and add your custom prompt command function in this file:

PROMPT_COMMAND=__prompt_command

__prompt_command() {
    local EXIT="$?"
    # The rest of your code here
}

Make sure your changes saved correctly for both your ~/.bash_profile and ~/.bashrc files.

Open a new git-bash window. Assuming you have no bugs in your __prompt_command() function, your custom prompt should display properly.

If you quickly want to test your prompt, you can instead just run source ~/.bashrc in your current git-bash window rather than launching a second one.

Thanks! It worked. Just for reference: to do an `if` I needed to write `if [[ $? -gt 0 ]];` — macabeus, Mar 03 '21 at 10:34

How to use function on git-prompt on Git Bash for Windows?

1 Answers1