個人化你的Bash Prompt

最近在研究Bash Prompt的呈現方式與顏色設定

首先要先知道顯示資訊的方式：

\u: current username
\h: hostname up to the first ., \H: full hostname
\w: current working directory, \W: same, but only the basename
$(__git_ps1 “%s”): your current git branch if you’re in a git directory, otherwise nothing
\$: if the effective UID is 0: #, otherwise $
\d: the date in “Weekday Month Date” format (e.g., “Tue May 26”)
\t: the current time in 24-hour HH:MM:SS format, \T: same, but 12-hour format, \@: same, but in 12-hour am/pm format
\n: newline
\r: carriage return
\\: backslash

我們要將顏色色碼放在\[\em\]中間，像\[\e[‹色碼›m\]

色碼選擇可參考這

username: unama

hostname: notebook

例如將下列這行加入~/.bashrc

PS1='\u@\h \w \$ '

並到~/執行

$ source .bashrc

就會顯示

unama@notebook ~ $

如果要加顏色則在要變色的資訊前加\[\e[‹色碼›m\]即可

ex.

PS1='[\033[01;32m\]\u@\h\[\033[01;33m\]\w\[\033[01;31m\]>\[\033[00m\]'

PS1='\u@\h \w$(__git_ps1 "(%s)") \$ '

如果出現以下錯誤訊息

-bash: __git_ps1: command not found

可以試著執行

curl -o ~/.git-prompt.sh \
    https://raw.githubusercontent.com/git/git/master/contrib/completion/git-prompt.sh

source ~/.git-prompt.sh