bash：parse_git_branch：找不到命令
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bash: parse_git_branch: command not found
提问by jtaylor94
This should be very simple. I recently noticed that when I type 'bash' into Terminal on Mac it shows this:
这应该很简单。我最近注意到，当我在 Mac 上的终端中键入“bash”时，它会显示以下内容：
Jays-MacBook-Pro: ~ $ bash
bash: parse_git_branch: command not found
When before it didn't. Can someone explain why and how to resolve.
以前没有的时候。有人可以解释为什么以及如何解决。
回答by Lungang Fang
It is likely that you configured BASH to run parse_git_branch and print the result as part of PS1 (or alike). You can check this by: "echo $PS1" and "echo $PROMPT_COMMAND".
您可能将 BASH 配置为运行 parse_git_branch 并将结果打印为 PS1（或类似的）的一部分。您可以通过以下方式检查：“echo $PS1”和“echo $PROMPT_COMMAND”。
However, parse_git_branch is not a builtin function of bash. Below is how I configured my PS1. You may want to copy my git_branch_4_ps1 as your parse_git_branch
但是， parse_git_branch 不是 bash 的内置函数。下面是我如何配置我的 PS1。你可能想复制我的 git_branch_4_ps1 作为你的 parse_git_branch
PS1='\n' # begin with a newline
PS1=$PS1'\[\e[38;5;101m\]\! \t ' # time and command history number
PS1=$PS1'\[\e[38;5;106m\]\u@\h ' # user@host
PS1=$PS1'\[\e[7;35m\]${MY_WARN}\[\e[0m\] ' # warning message if there is any
PS1=$PS1'\[\e[38;5;10m\]${MY_EXTRA} ' # extra info if there is any
PS1=$PS1'\[\e[0;36m\]$(git_branch_4_ps1) ' # git_branch_4_ps1 defined below
PS1=$PS1'\[\e[38;5;33m\]\w' # working directory
PS1=$PS1'\n\[\e[32m\]$ ' # "$"/"#" sign on a new line
PS1=$PS1'\[\e[0m\]' # restore to default color
function git_branch_4_ps1 { # get git branch of pwd
local branch="$(git branch 2>/dev/null | grep "\*" | colrm 1 2)"
if [ -n "$branch" ]; then
echo "(git: $branch)"
fi
}
回答by andrej
Instead of having
而不是拥有
parse_git_branch
call in PS1 definition alone you may use
单独调用 PS1 定义，您可以使用
parse_git_branch 2>/dev/null
to send stderrto /dev/null. This will silence the error you don't want to see.
发送stderr到/dev/null. 这将使您不想看到的错误静音。
回答by orthocresol
If your parse_git_branchis defined in ~/.bash_profile, it will not be loaded when you open a non-login shell (e.g. by running bash).
如果您parse_git_branch在 中定义~/.bash_profile，则在您打开非登录外壳程序（例如通过运行bash）时将不会加载它。
The differences between login and non-login shells are described here: Difference between Login Shell and Non-Login Shell?For our purposes, the main difference is that login shells (e.g. that when you first open Terminal) automatically source ~/.bash_profileupon startup, whereas non-login shells (e.g. that when you run bashfrom within Terminal) do not.
登录shell和非登录shell的区别描述如下：Difference between Login Shell and Non-Login Shell? 就我们的目的而言，主要区别在于登录外壳（例如，当您第一次打开终端时）~/.bash_profile在启动时自动获取，而非登录外壳（例如，当您bash从终端中运行时）不会。
To fix this error, simply source your ~/.bash_profileafter running bash:
要修复此错误，只需~/.bash_profile在运行 bash 后获取源代码：
user@host:~ $ bash
bash: parse_git_branch: command not found
user@host:~ $ source .bash_profile
Alternatively, place the function in ~/.bashrcinstead, which will be automatically sourced by non-login shells (as covered in the earlier link).
或者，将函数放入~/.bashrc，它将由非登录 shell 自动获取（如前面的链接中所述）。
回答by Walterwhites
have you export your $PS1 ? You can check by run command:
你有导出你的 $PS1 吗？您可以通过运行命令检查：
printenv
else you should export it by run:
否则你应该通过运行导出它：
export -n PS1
after you will can run sudo or sudo su without problem
在您可以毫无问题地运行 sudo 或 sudo su 之后
