问题描述
我当前的PS1:
PS1='\[\033]0;$TITLEPREFIX:${PWD//[^[:ascii:]]/?}\007\]\n\[\033[32m\]\u@\h \[\033[35m\]`date +%Y-%m-%d,%H:%M:%S` \[\033[33m\]\w\[\033[36m\]`__git_ps1`\[\033[0m\]\n$: '
是的,这很糟,但是对我来说很好-我的提示如下:
Yes, it's a mess, but it serves me well - my prompts look like this:
P2759474@RVPTINTCL415MQC 2017-10-06,11:20:18 ~/repos/jdk (master)
它们甚至用颜色编码,其中user @ machine为绿色,timestamp为紫色,当前位置为黄色,任何git分支为蓝色.我有点生气,我必须使用反引号而不是 $()
构造.
They are even color coded, with user@machine in green, timestamp in purple, current location in yellow, and any git branch in blue. I'm just a little annoyed that I have to use backticks instead of a $()
construct.
有人知道为什么吗?愿意帮助我理解吗?这只是使用subshell命令解析复杂的提示值时的一个问题,而这只是一个问题,因为我想了解它在那里的重要性...我们总是欢迎一般的改进建议.
Anyone know why? Willing to help me understand it? It's only a problem when parsing complex prompt values with subshell commands, and only a problem then because I want to understand why it matters there... General improvement suggestions always welcome while we're at it.
更新-
当前,当我尝试使用$()时,会得到很多
Currently when I try to use $() I get a lot of
bash: command substitution: line 1: syntax error near unexpected token ')'
bash: command substitution: line 1: 'date +%Y-%m-%d,%H:%M:%S)'
bash: command substitution: line 1: syntax error near unexpected token ')'
bash: command substitution: line 1: '__git_ps1)'
我的环境有
BASH_VERSINFO=([0]="4" [1]="3" [2]="42" [3]="5" [4]="release" [5]="x86_64-pc-msys")
BASH_VERSION='4.3.42(5)-release'
[ -z "$BASH_VERSION" ] || shopt -q promptvars || ps1_expanded=no;
这告诉了我一些东西,也许...谢谢!
That tells me something, maybe... Thanks!
推荐答案
当您开始尝试在提示符中嵌入命令时,是时候开始使用 PROMPT_COMMAND
了.
When you start trying to embed commands in your prompt, it is time to start using PROMPT_COMMAND
.
# You won't even have to put the title-bar stuff in your prompt
# and there are already shortcuts for date and time
set_titlebar () {
printf '\033]0;%s:%s\007' "$TITLEPREFIX" "${PWD//[^[:ascii:]]/?}"
}
set_prompt () {
PS1='\[\033[32m\]\u@\h ' # user@host in green
PS1+='\[\033[35m\]\D{%Y-%m-%d},\t ' # Don't need date
PS1+='\[\033[33m\]\w\[\033[36m\]' # Directory in orange
PS1+=$(__git_ps1) # git info, if appropriate
PS1+='\[\033[0m\]\n$: '
}
PROMPT_COMMAND='set_titlebar;set_prompt'
这篇关于为什么我不能在PS1中使用$(...)而不是反引号?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!