試圖跟隨在這裏回答顯示的Git分支在我的終端，但它似乎沒有工作

Question

我使用Linux Mint的18，我已經添加了以下到我的.bashrc：

# GIT 
parse_git_branch() { 
    git branch 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/(\1)/' 
} 
PS1="${debian_chroot:+($debian_chroot)}\u@\h:\w\$(parse_git_branch) $ " 

我重新加載.bashrc，但重啓我的終端並轉到包含git repo的文件夾後，分支仍然不顯示。

我不知道我在做什麼錯，這在我的macbook中正常工作。

有人可以幫助我嗎？謝謝

# ~/.bashrc: executed by bash(1) for non-login shells. 
# see /usr/share/doc/bash/examples/startup-files (in the package bash-doc) 
# for examples 

# GIT 
parse_git_branch() { 
    git branch 2> /dev/null | sed -e '/^[^*]/d' -e 's/* \(.*\)/(\1)/' 
} 
PS1='${debian_chroot:+($debian_chroot)}\u@\h:\w\$(parse_git_branch) $ ' 

# INFINALITY FONT RENDERING CONFIG 
. /etc/infinality-settings.sh 

# If not running interactively, don't do anything 
case $- in 
    *i*) ;; 
     *) return;; 
esac 

# don't put duplicate lines or lines starting with space in the history. 
# See bash(1) for more options 
HISTCONTROL=ignoreboth 

# append to the history file, don't overwrite it 
shopt -s histappend 

# for setting history length see HISTSIZE and HISTFILESIZE in bash(1) 
HISTSIZE=1000 
HISTFILESIZE=2000 

# check the window size after each command and, if necessary, 
# update the values of LINES and COLUMNS. 
shopt -s checkwinsize 

# If set, the pattern "**" used in a pathname expansion context will 
# match all files and zero or more directories and subdirectories. 
#shopt -s globstar 

# make less more friendly for non-text input files, see lesspipe(1) 
[ -x /usr/bin/lesspipe ] && eval "$(SHELL=/bin/sh lesspipe)" 

# set variable identifying the chroot you work in (used in the prompt below) 
if [ -z "${debian_chroot:-}" ] && [ -r /etc/debian_chroot ]; then 
    debian_chroot=$(cat /etc/debian_chroot) 
fi 

# set a fancy prompt (non-color, unless we know we "want" color) 
case "$TERM" in 
    xterm|xterm-color|*-256color) color_prompt=yes;; 
esac 

# uncomment for a colored prompt, if the terminal has the capability; turned 
# off by default to not distract the user: the focus in a terminal window 
# should be on the output of commands, not on the prompt 
#force_color_prompt=yes 

if [ -n "$force_color_prompt" ]; then 
    if [ -x /usr/bin/tput ] && tput setaf 1 >&/dev/null; then 
    # We have color support; assume it's compliant with Ecma-48 
    # (ISO/IEC-6429). (Lack of such support is extremely rare, and such 
    # a case would tend to support setf rather than setaf.) 
    color_prompt=yes 
    else 
    color_prompt= 
    fi 
fi 

if [ "$color_prompt" = yes ]; then 
    if [[ ${EUID} == 0 ]] ; then 
     PS1='${debian_chroot:+($debian_chroot)}\[\033[01;31m\]\h\[\033[01;34m\] \W \$\[\033[00m\] ' 
    else 
     PS1='${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[00m\] \[\033[01;34m\]\w \$\[\033[00m\] ' 
    fi 
else 
    PS1='${debian_chroot:+($debian_chroot)}\u@\h \w \$ ' 
fi 
unset color_prompt force_color_prompt 

# If this is an xterm set the title to user@host:dir 
case "$TERM" in 
xterm*|rxvt*) 
    PS1="\[\e]0;${debian_chroot:+($debian_chroot)}\u@\h \w\a\]$PS1" 
    ;; 
*) 
    ;; 
esac 

# enable color support of ls and also add handy aliases 
if [ -x /usr/bin/dircolors ]; then 
    test -r ~/.dircolors && eval "$(dircolors -b ~/.dircolors)" || eval "$(dircolors -b)" 
    alias ls='ls --color=auto' 
    #alias dir='dir --color=auto' 
    #alias vdir='vdir --color=auto' 

    alias grep='grep --color=auto' 
    alias fgrep='fgrep --color=auto' 
    alias egrep='egrep --color=auto' 
fi 

# colored GCC warnings and errors 
#export GCC_COLORS='error=01;31:warning=01;35:note=01;36:caret=01;32:locus=01:quote=01' 

# some more ls aliases 
alias ll='ls -alF' 
alias la='ls -A' 
alias l='ls -CF' 

# Add an "alert" alias for long running commands. Use like so: 
# sleep 10; alert 
alias alert='notify-send --urgency=low -i "$([ $? = 0 ] && echo terminal || echo error)" "$(history|tail -n1|sed -e '\''s/^\s*[0-9]\+\s*//;s/[;&|]\s*alert$//'\'')"' 

# Alias definitions. 
# You may want to put all your additions into a separate file like 
# ~/.bash_aliases, instead of adding them here directly. 
# See /usr/share/doc/bash-doc/examples in the bash-doc package. 

if [ -f ~/.bash_aliases ]; then 
    . ~/.bash_aliases 
fi 

# enable programmable completion features (you don't need to enable 
# this, if it's already enabled in /etc/bash.bashrc and /etc/profile 
# sources /etc/bash.bashrc). 
if ! shopt -oq posix; then 
    if [ -f /usr/share/bash-completion/bash_completion ]; then 
    . /usr/share/bash-completion/bash_completion 
    elif [ -f /etc/bash_completion ]; then 
    . /etc/bash_completion 
    fi 
fi 

if [ -x /usr/bin/mint-fortune ]; then 
    /usr/bin/mint-fortune 
fi 

Answer 1

您需要使用單引號。正如您所寫，parse_git_branch只能運行一次：當PS1被初始分配時。通過使用單引號，它將在每次評估PS1時運行。

PS1='${debian_chroot:+($debian_chroot)}\u@\h:\w$(parse_git_branch) $ '