关于gitbash一直报：sh: __git_ps1: command not found的解决办法

Question

在使用set命令设置docker的环境变量，
然后gitbash一直报sh: __git_ps1: command not found。

搜索了一番，并没有相似的解决办法。

Answer 1

在stackoverflow上找到灵感，就去gitbash的安装目录\Git\etc搜寻了一番，找到了如下文件：
bash.bashrc

其中有这么一行

# Set a default prompt of: user@host, MSYSTEM variable, and current_directory
# PS1='\[\e]0;\w\a\]\n\[\e[32m\]\u@\h \[\e[35m\]$MSYSTEM\[\e[0m\] \[\e[33m\]\w\[\e[0m\]\n\$ '

我把PS1前面的#去掉，然后在输入sh，就没有报错了

Answer 2

是因为__git_ps1未定义,
可以先初始化一下git-prompt环境变量.
例如:
source ~/.git-prompt.sh

虽然时隔多年，但是是被搜索的第一个，忍不住注册个账号来回答一下，为以后的同学踩坑有迹可循。

具体请参考:git-prompt.sh第12行

1 # bash/zsh git prompt support
2 #
3 # Copyright (C) 2006,2007 Shawn O. Pearce <spearce@spearce.org>
4 # Distributed under the GNU General Public License, version 2.0.
5 #
6 # This script allows you to see repository status in your prompt.
7 #
8 # To enable:
9 #
10 # 1) Copy this file to somewhere (e.g. ~/.git-prompt.sh).
11 # 2) Add the following line to your .bashrc/.zshrc:
12 # source ~/.git-prompt.sh
13 # 3a) Change your PS1 to call __git_ps1 as
14 # command-substitution:
15 # Bash: PS1='[u@h W$(__git_ps1 " (%s)")]\$ '
16 # ZSH: setopt PROMPT_SUBST ; PS1='[%n@%m %c$(__git_ps1 " (%s)")]\$ '
17 # the optional argument will be used as format string.
18 # 3b) Alternatively, for a slightly faster prompt, __git_ps1 can
19 # be used for PROMPT_COMMAND in Bash or for precmd() in Zsh
20 # with two parameters, <pre> and <post>, which are strings
21 # you would put in $PS1 before and after the status string
22 # generated by the git-prompt machinery. e.g.
23 # Bash: PROMPT_COMMAND='__git_ps1 "u@h:w" "\$ "'
24 # will show username, at-sign, host, colon, cwd, then
25 # various status string, followed by dollar and SP, as
26 # your prompt.
27 # ZSH: precmd () { __git_ps1 "%n" ":%~$ " "|%s" }
28 # will show username, pipe, then various status string,
29 # followed by colon, cwd, dollar and SP, as your prompt.
30 # Optionally, you can supply a third argument with a printf
31 # format string to finetune the output of the branch status