为什么我的bash提示有时会被覆盖? [英] Why does my bash prompt sometimes get overwritten?
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问题描述
这是我的 bashrc
的相关部分:
function find_git_branch {
local dir=. head
until [ "$dir" -ef / ]; do
if [ -f "$dir/.git/HEAD" ]; then
head=$(< "$dir/.git/HEAD")
if [[ $head == ref:\ refs/heads/* ]]; then
git_branch=" (${head#*/*/})"
elif [[ $head != '' ]]; then
git_branch=' (detached)'
else
git_branch=' (unknown)'
fi
return
fi
dir="../$dir"
done
git_branch=''
}
function shortpath {
# How many characters of the $PWD should be kept
local pwd_length=40
local lpwd="${PWD/#$HOME/~}"
if [ $(echo -n $lpwd | wc -c | tr -d " ") -gt $pwd_length ]
then newPWD="...$(echo -n $lpwd | sed -e "s/.*\(.\{$pwd_length\}\)/\1/")"
else newPWD="$(echo -n $lpwd)"
fi
echo $newPWD
}
PROMPT_COMMAND="find_git_branch; $PROMPT_COMMAND"
# PS1 prompt color vars
CYAN="\e[36m"
RED="\e[31m"
GREEN="\e[32m"
DEFAULT="\e[0m"
TIME="[\t]"
DIRNAME="\w"
export PS1="\u@\h:\[$CYAN\]\$(shortpath)\[$GREEN\]\[\$git_branch\]\[$DEFAULT\] \$ "
它运行良好,但是有时当我键入或单击先前命令的向上箭头时,部分提示会在终端中被覆盖.为什么会这样?
It works well, but sometimes as I type or hit the up arrow for previous commands, part of the prompt gets overwritten in the terminal. Why does this happen?
推荐答案
好像您将 $ git_branch
部分包含在非打印字符块( \ [...\]
).
Looks like you're including your $git_branch
part in a non-printing-chars block (\[...\]
).
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