show-git-branch.sh

# show Git branch name with some informations
# normal: ~/git/foo (master)
# something to commit: ~/git/foo (master*)
# not pushed to origin: ~/git/foo (master!)
# something to commit and not pushed to origin: ~/git/foo (master*!)

# Git: get branch status
function git_get_branch_status {
  local STATUS=`git status 2> /dev/null | tail -n1`
  [[ ${STATUS} != "nothing to commit (working directory clean)" ]] && echo -ne "*"

  local REMOTE=`git log origin/$1 2> /dev/null | head -n1`
  local LOCAL=`git log $1 2> /dev/null | head -n1`
  [[ ${REMOTE} ]] && [[ ${REMOTE} != ${LOCAL} ]] && echo -ne "!"
}

# Git: show branch name
function git_show_branch_name {
  BRANCH=`git branch --no-color 2> /dev/null | sed -e '/^[^*]/d' -e "s/* \(.*\)/\1/"`
  if [[ ${BRANCH} != "" ]]; then
    echo -ne "("
    echo -ne ${BRANCH}
    git_get_branch_status ${BRANCH}
    echo -ne ")"
  fi
}

# prompt settings
export PS1='
\[\e[1;33m\]\w \[\e[1;32m\]$(git_show_branch_name)
\[\e[0m\]$ '