Ubuntu – Prompt doesn’t update git branch

bashbashrcgit

I tried to integrate the current git branch in my prompt, but it doesn't behave as expected. I'm using bash on ubuntu 16.04 and git 2.7.4.
When I start a terminal nothing of git is shown. If I source my .bashrc from inside a repository the branch is shown, but doesn't update anymore. This is what I wrote in my .bashrc:

green="\[\033[01;32m\]"
blue="\[\033[01;34m\]"
no_color="\[\033[00m\]"
purple="\[\033[01;35m\]"

source ~/.git-prompt.sh
export PS1="$purple\u $green$(__git_ps1 " (%s)") $blue\W $no_color \$ "

Update:

I tried follow the instructions in git-prompt but still the same result. However if I just copy the suggestion from git-prompt: PS1='[\u@\h \W$(__git_ps1 " (%s)")]\$ ' it works, but of course doesn't look like I want. Is there some syntax error I'm missing?
The template PS1 works even if don't use export, just PS1=...

Best Answer

Ok I found the solution. It is not necessary to use prompt command. The bug arises due to a syntax error.

If I assign the content of PS1 with "" in order to use my variables for the colors, it only executes the __git_ps1 function when .bashrc is sourced.

But when I assign the PS1 content within '' and do it without variables for the color and instead write the codes out, it works as expected. And as I read here it seems to be better practice not to export PS1 to the environment.

So the solution looks like:

PS1='\[\033[01;35m\]\u \[\033[01;32m\]$(__git_ps1 " (%s)") \[\033[01;34m\]\W \[\033[00m\] \$ '

However I would be curious to know, what's the reason for this. It works within "" in macOS.

Related Solutions

Ubuntu – Git Branch in ZSH Prompt

Use the vcs_info function in the zsh user contributions (included in the zsh package). Quick start:

autoload -Uz vcs_info
precmd () { vcs_info }
setopt prompt_subst
PS1="\$vcs_info_msg_0_$PS1"

It's likely that you'll want to make the output prettier. Since that's matter of personal taste, I refer you to the examples in the documentation.

Ubuntu – How to show the git branch with colours in Bash prompt

This snippet:

# Add git branch if its present to PS1

parse_git_branch() {
 git branch 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/(\1)/'
}
if [ "$color_prompt" = yes ]; then
 PS1='${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[01;31m\]$(parse_git_branch)\[\033[00m\]\$ '
else
 PS1='${debian_chroot:+($debian_chroot)}\u@\h:\w$(parse_git_branch)\$ '
fi

Is meant to replace the default prompt definition:

if [ "$color_prompt" = yes ]; then
    PS1='${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ '
else
    PS1='${debian_chroot:+($debian_chroot)}\u@\h:\w\$ '
fi

Which ends with:

unset color_prompt force_color_prompt

The .bashrc you posted shows you're adding it after the default prompt definition and unset color_prompt force_color_prompt (line #64).

Either replace the default prompt definition with the snippet or leave your ~/.bashrc as it is and comment the default prompt definition along with unset color_prompt force_color_prompt on line #64:

So part of your .bashrc could look like

parse_git_branch() {
 git branch 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/(\1)/'
}
if [ "$color_prompt" = yes ]; then
 PS1='${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[01;31m\] $(parse_git_branch)\[\033[00m\]\$ '
else
 PS1='${debian_chroot:+($debian_chroot)}\u@\h:\w$(parse_git_branch)\$ '
fi
# THE SIX LINES BELOW are the default prompt and the unset (which were in the original .bashrc)
#if [ "$color_prompt" = yes ]; then
#    PS1='${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ '
#else
#    PS1='${debian_chroot:+($debian_chroot)}\u@\h:\w\$ '
#fi
#unset color_prompt force_color_prompt

Update:

Best Answer

Related Solutions

Ubuntu – Git Branch in ZSH Prompt

Ubuntu – How to show the git branch with colours in Bash prompt

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