附加Git的分支名到命令提示符 [英] Append git's branch name to command prompt

问题描述

我想使用Git的-completion.bash功能之一，但我不能自定义我想拥有的外观。这里是我的.bash_profile文件的相关部分：

I wanted to use one of the Git-completion.bash features but I can't customize the look I'd like to have. Here is relevant part of my .bash_profile:

source ~/.git-completion.bash

function prompt
{
local WHITE="\[\033[1;37m\]"
local GREEN="\[\033[0;32m\]"
local CYAN="\[\033[0;36m\]"
local GRAY="\[\033[0;37m\]"
local BLUE="\[\033[0;34m\]"
export PS1="
${GREEN}\u${CYAN}@${BLUE}\h ${CYAN}\w $(__git_ps1 '(%s)') ${GRAY}
$ "
}
prompt

和它没有显示分支名称

不过，如果我替换上面与下面的一家出口PS1，它按预期工作：

However, if I replace export PS1 above with the one below, it works as expected:

export PS1='\w$(__git_ps1 "(%s)") > '

我想这是一些撇号/引号的问题。

I guess it's some apostrophe / quotation marks issue.

我应该如何纠正第一版本，以获得它的工作？

How should I correct the 1st version to get it to work?

推荐答案

要获得引用正确的窍门是有eveything双引号的，除了 $（__ git_ps1（％S）） ，这是单引号。

The trick to get the quoting right is to have eveything double-quoted, except for $(__git_ps1 "(%s)"), which is single-quoted.

source ~/.git-completion.bash
function prompt
{
local WHITE="\[\033[1;37m\]"
local GREEN="\[\033[0;32m\]"
local CYAN="\[\033[0;36m\]"
local GRAY="\[\033[0;37m\]"
local BLUE="\[\033[0;34m\]"
export PS1="
${GREEN}\u${CYAN}@${BLUE}\h ${CYAN}\w"' $(__git_ps1 "(%s)") '"${GRAY}"
}
prompt

这是另一种解决办法是更换 $（与 \\ $（在code中的问题

An alternative solution is to replace $( with \$( in the code in the question.

背景资料：两个换人发生：首先在出口PS1 =...时间，后来当显示提示。要执行 __ git_ps1 每次显示提示时间，所以你必须确保第一次换人保持 $（...）完好无损。所以，你要么写'$（...）或\\ $（...）。这是我提出的解决方案背后的两个基本思路。

Background information: Two substitutions take place: first at export PS1="..." time, and later when the prompt is displayed. You want to execute __git_ps1 each time the prompt is displayed, so you have to make sure that the first substitution keeps $(...) intact. So you write either '$(...)' or "\$(...)". These are the two basic ideas behind the solutions I've proposed.

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