Bash PROMPT_命令，用于在git更新到1.8之前显示git分支

我不久前从一些博客文章中获得了这段bash代码，它用于在提示符中显示我当前的git分支和脏状态。将git从1.7.11.4更新到1.8.5.4后，它不再显示分支或脏状态

这是我的提示过去的样子：

[~/some/project (master)↑⚡] ->

它显示了（当前git分支），箭头表示我在遥控器前面，我应该按下，闪电表示我有未限制的更改

更新后，仅此而已（对回购协议没有任何更改）：

以下是我的.bash_配置文件中的代码：

        RED="\[\033[0;31m\]"
     YELLOW="\[\033[0;33m\]"
        GREEN="\[\033[0;32m\]"
       BLUE="\[\033[0;34m\]"
  LIGHT_RED="\[\033[1;31m\]"
LIGHT_GREEN="\[\033[1;32m\]"
      WHITE="\[\033[1;37m\]"
 LIGHT_GRAY="\[\033[0;37m\]"
 COLOR_NONE="\[\e[0m\]"

function parse_git_branch {
  git rev-parse --git-dir &> /dev/null
  git_status="$(git status 2> /dev/null)"
  branch_pattern="^# On branch ([^${IFS}]*)"
  remote_pattern="# Your branch is (.*) of"
  diverge_pattern="# Your branch and (.*) have diverged"

  if [[ ! ${git_status}} =~ "working directory clean" ]]; then
    state="${RED}⚡"
  fi

  # add an else if or two here if you want to get more specific
  if [[ ${git_status} =~ ${remote_pattern} ]]; then
    if [[ ${BASH_REMATCH[1]} == "ahead" ]]; then
      remote="${YELLOW}↑"
    else
      remote="${YELLOW}↓"
    fi
  fi

  if [[ ${git_status} =~ ${diverge_pattern} ]]; then
    remote="${YELLOW}↕"
  fi

  if [[ ${git_status} =~ ${branch_pattern} ]]; then
    branch=${BASH_REMATCH[1]}
    echo " (${branch})${remote}${state}"
  fi
}

function prompt_func() {
    previous_return_value=$?;
    prompt="${TITLEBAR}${BLUE}[${YELLOW}\w${GREEN}$(parse_git_branch)${BLUE}]${COLOR_NONE} "
    if test $previous_return_value -eq 0
    then
        PS1="${prompt}➔ "
    else
        PS1="${prompt}${RED}➔${COLOR_NONE} "
    fi
}

PROMPT_COMMAND=prompt_func

我对bash不是很在行，所以有人能发现问题，或者有更好的解决方案吗

我正在玩弄bash代码，但还没弄明白。请帮忙

• Mac 10.9.1
• Git 1.8.5.4
• iTerm 2

---

嗯，这比我想象的要容易。问题是在git 1.7中，git status命令会回显：

# On branch master
nothing to commit (working directory clean)

前面有一个前导的

#

。现在，Git1.8输出相同的内容，只是没有

#

所以我所要做的就是更改这些行：

branch_pattern="^# On branch ([^${IFS}]*)"
remote_pattern="# Your branch is (.*) of"
diverge_pattern="# Your branch and (.*) have diverged"

致：

---

删除了

#

后，一切都会恢复正常。
注意，此模式仍然失败：

remote_pattern="Your branch is (.*) of"

新的git输出如下所示：

Your branch is behind 'origin/master' by 2 commits, and can be fast-forwarded.
Your branch is ahead of 'origin/master' by 1 commit.

因此，模式应改为：

remote_pattern="Your branch is (behind|ahead) "

Your branch is behind 'origin/master' by 2 commits, and can be fast-forwarded.
Your branch is ahead of 'origin/master' by 1 commit.

remote_pattern="Your branch is (behind|ahead) "