为什么此代码在 Linux 上的 bash 中有效，而在 Windows 上的 git-bash 中无效

Question

I have set up my bash prompt like so:

vcs(){
  if [ $PROMPT_VCS -eq "1" ] && [ $have_vcprompt -eq "1" ]; then
    echo -en "$(vcprompt -f "on ${EMM}%n${EMW}:%b${G}%m${R}%u${NONE}")"
  fi
}

bash_prompt() {
  case $TERM in
    xterm*|rxvt*)
      local TITLEBAR='\[\033]0;${SHORT_HOST} ${NEW_PWD}\007\]'
      ;;
    *)
    local TITLEBAR=""
    ;;
  esac

  local UC=$EMG
  [ $UID -eq 0 ] && UC=$EMR

  local ARROW_COLOR=$EMR
  [ $? -eq 0 ] && ARROW_COLOR=$EMG

  PS1="\[${TITLEBAR}\
${UC}\u \
${NONE}at ${EMY}\h \
${NONE}in ${EMB}\${NEW_PWD} \
${NONE}\$(vcs) \
${K} \
\[${NONE}\]\n\[${ARROW_COLOR}\]\$ \[${NONE}\]"

}

This works perfectly on my laptop running Debian, but on Windows, using git-bash, I get the following error:

bash: command substitution: line 1: syntax error near unexpected token `)'
bash: command substitution: line 1: `vcs)'

The VC info consequently does not appear in the prompt. I don't understand why git-bash has a problem with that closing bracket..

Answer 1

Thanks to Gerrit's comment, the answer was found here . The functioning version (including newline) looks like this:

  PS1="\[${TITLEBAR}\
${UC}\u \
${NONE}at ${EMY}\h \
${NONE}in ${EMB}\${NEW_PWD} \
${NONE}\$(vcs) \
${K} \
\[${NONE}\]\[${ARROW_COLOR}\]"$'\n$ '"\[${NONE}\]"

If someone could explain what causes this problem that would be even better.