Minimal bash prompt with return status, command sequence and VCS status (svn, git, hg) using Latin-1 symbols. User, host, path and branch are in title bar.

vcs_prompt.sh

RD=`tput bold; tput setaf 1`
GN=`tput bold; tput setaf 2`
YL=`tput bold; tput setaf 3`
BL=`tput bold; tput setaf 4`
MG=`tput bold; tput setaf 5`
CY=`tput bold; tput setaf 6`
NC=`tput sgr0`
VCS_PROMPT_CHAR_svn='§'
VCS_PROMPT_CHAR_git='±'
VCS_PROMPT_CHAR_hg='¿'
if [[ `</proc/1/cgroup` = *:/docker/* ]] ; then
    [[ "$DOCKER_IMAGE" ]] && DOCKER_PROMPT="(${DOCKER_IMAGE##*/}) " || DOCKER_PROMPT="(docker) "
else
    DOCKER_PROMPT=""
fi
RET_PROMPT='RET=$?; (( RET )) && echo -ne "\001$RD\002$RET\001$NC\002|"'
__vcs_prompt() {
  local vcs=''
  if [[ -d .svn ]]; then
    vcs='svn'
  elif [[ -d . ]]; then
    local rel='.' fs=`stat --printf=%d .`
    while ! [[ $rel -ef $rel/.. ]]; do
      if [[ -d $rel/.git ]] \
        && ! git clean -xnd $PWD 2>/dev/null | grep -q "Would remove \./"; then
        vcs='git'
      elif [[ -d $rel/.hg ]]; then
        vcs='hg'
      fi
      [[ "$vcs" ]] && break
      rel=$rel/..
      [[ `stat --printf=%d $rel` == $fs ]] || break
    done
  fi
  __vcs_prompt_branch=
  if [[ "$vcs" ]]; then
    __vcs_prompt_char=VCS_PROMPT_CHAR_$vcs
    __vcs_prompt_char=${!__vcs_prompt_char}
    case "$vcs" in
      svn) [[ -n `svn status --ignore-externals | grep -v ^X` ]] && __vcs_col=$RD || __vcs_col=$GN;;
      git)
          if git status --porcelain=v1 | grep -q '^.[MDRC?]'; then
              __vcs_col=$RD # unstaged changes
          elif [[ -n `git status --porcelain=v1` ]]; then
              __vcs_col=$YL # staged but not committed
          elif [[ -n `git cherry 2>&1` ]]; then
              __vcs_col=$CY # committed but not pushed
          else
              __vcs_col=$GN # all safe!
          fi
          __vcs_prompt_branch=@`git describe --contains --all HEAD 2>&1`
          ;;
      hg) [[ -n `hg status` ]] && __vcs_col=$RD || __vcs_col=$GN;;
    esac
  elif [[ -d . ]]; then
    __vcs_prompt_char='$'
    __vcs_col=$BL
  else
    __vcs_prompt_char='!'
    __vcs_col=$RD
  fi
}
if [ "$TERM" = xterm ] || [ "$TERM" = xterm-256color ] || ([ -n "$COLORTERM" ] && [ -n "$DISPLAY" ]); then
  VCS_PROMPT='__vcs_prompt; echo -e "\001$__vcs_col\002$__vcs_prompt_char\001$NC\033]0;\u@\H \w$__vcs_prompt_branch\007\002"'
  PS1="\\[\r\\]$DOCKER_PROMPT\$($RET_PROMPT)\#\$($VCS_PROMPT) "
else
  VCS_PROMPT='__vcs_prompt; echo -e "\001$__vcs_col\002$__vcs_prompt_char\001$NC\002"'
  PS1="\[$GN\]\u@\h \w\\[\r\\]$DOCKER_PROMPT\$($RET_PROMPT)\$($VCS_PROMPT) "
fi