bash 将 git 的分支名称附加到命令提示符
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Append git's branch name to command prompt
提问by Piotr Byzia
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:
我想使用 Git-completion.bash 功能之一，但我无法自定义我想要的外观。这是我的 .bash_profile 的相关部分：
source ~/.git-completion.bash
function prompt
{
local WHITE="\[3[1;37m\]"
local GREEN="\[3[0;32m\]"
local CYAN="\[3[0;36m\]"
local GRAY="\[3[0;37m\]"
local BLUE="\[3[0;34m\]"
export PS1="
${GREEN}\u${CYAN}@${BLUE}\h ${CYAN}\w $(__git_ps1 '(%s)') ${GRAY}
$ "
}
prompt
and it doesn't show the branch name.
它不显示分支名称。
However, if I replace export PS1 above with the one below, it works as expected:
但是，如果我用下面的替换上面的 export PS1，它会按预期工作：
export PS1='\w$(__git_ps1 "(%s)") > '
I guess it's some apostrophe / quotation marks issue.
我想这是一些撇号/引号问题。
How should I correct the 1st version to get it to work?
我应该如何更正第一个版本以使其正常工作？
回答by pts
The trick to get the quoting right is to have eveything double-quoted, except for $(__git_ps1 "(%s)"), which is single-quoted.
获得正确引用的诀窍是将所有内容都用双引号引起来，除了$(__git_ps1 "(%s)")单引号。
source ~/.git-completion.bash
function prompt
{
local WHITE="\[3[1;37m\]"
local GREEN="\[3[0;32m\]"
local CYAN="\[3[0;36m\]"
local GRAY="\[3[0;37m\]"
local BLUE="\[3[0;34m\]"
export PS1="
${GREEN}\u${CYAN}@${BLUE}\h ${CYAN}\w"' $(__git_ps1 "(%s)") '"${GRAY}"
}
prompt
An alternative solution is to replace $(with \$(in the code in the question.
另一种解决方案是在问题的代码中替换$(为\$(。
Background information: Two substitutions take place: first at export PS1="..."time, and later when the prompt is displayed. You want to execute __git_ps1each 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.
背景信息：发生两次替换：第一次是在export PS1="..."时间，然后是在显示提示时。您希望__git_ps1每次显示提示时都执行，因此您必须确保第一次替换保持$(...)完整。所以，你要么写'$(...)'或"\$(...)"。这是我提出的解决方案背后的两个基本思想。
