way better git prompt

bash-files/bashrc

@@ -7,23 +7,39 @@ shopt -s histappend
 # update the values of LINES and COLUMNS.
 shopt -s checkwinsize
 
-parse_git_dirty() {
-  [[ $(git status 2> /dev/null | tail -n1) != "nothing to commit (working directory clean)" ]] && echo "(*)"
-}
-
-parse_git_stash() {
-	[[ $(git stash list 2> /dev/null | tail -n1) != "" ]] && echo "(^)"
-}
-
-parse_git_branch () {
-  git branch --no-color 2> /dev/null | sed -e '/^[^*]/d' -e "s/* \(.*\)/\1/"
-}
-
 BLACK="\[\033[0;38m\]"
 RED="\[\033[0;31m\]"
 RED_BOLD="\[\033[01;31m\]"
 BLUE="\[\033[01;34m\]"
 GREEN="\[\033[0;32m\]"
+YELLOW="\[\033[0;33m\]"
+
+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 " $RED(${branch})${remote}${state} "
+  fi
+}
 
 export CLICOLOR=1
 export EDITOR=/usr/bin/mvim
@@ -75,6 +91,4 @@ if [ -f /opt/local/etc/bash_completion.d/git ]; then
 fi
 
 # configure my multi-line prompt
-export PS1="
-$BLACK[ \u@$RED\h $GREEN\w $RED_BOLD{ \$(parse_git_branch) \$(parse_git_dirty)\$(parse_git_stash) } $BLACK]
-> "
+export PS1="\n$BLACK[ \u@$RED\h $GREEN\w$RED$(parse_git_branch)$BLACK]\n> "