admin/prog/bash_prompt

   1 cgmem_which_prompt() {
   2    local _cgmem_which
   3    _cgmem_which="`cgmem_which 2>/dev/null`"
   4    if [ -n "$_cgmem_which" ]; then
   5       echo "[$_cgmem_which] "
   6    fi
   7 }
   8
   9 short_curdir() {
  10    if [ "$PWD" = / ]; then
  11       echo /
  12       return
  13    fi
  14    if [ "$PWD" = "$HOME" ]; then
  15       echo "~"
  16       return
  17    fi
  18    local _short_curdir
  19    _short_curdir="${PWD##*/}" # cut all directories, get base name
  20    if [ "${#_short_curdir}" -gt 18 ]; then
  21       _short_curdir="${_short_curdir::15}..." # cut long string
  22    fi
  23    echo "${_short_curdir}"
  24 }
  25
  26 # bash_prompt; adapted from
  27 # https://github.com/necolas/dotfiles/blob/master/shell/bash_prompt and
  28 # https://github.com/git/git/blob/master/contrib/completion/git-prompt.sh
  29
  30 prompt_git() {
  31     local s=""
  32     local branchName=""
  33
  34     # check if the current directory is in a git repository
  35     if git rev-parse --is-inside-work-tree &>/dev/null; then
  36
  37         # check if the current directory is in .git before running git checks
  38         if [ "$(git rev-parse --is-inside-git-dir 2> /dev/null)" == "false" ]; then
  39
  40             # ensure index is up to date
  41             #git update-index --really-refresh -q &>/dev/null
  42
  43             # check for uncommitted changes in the index
  44             if ! $(git diff --quiet --ignore-submodules --cached); then
  45                 s="$s+";
  46             fi
  47
  48             # check for unstaged changes
  49             if [ -n "$(git ls-files --modified)" ]; then
  50                 s="$s*";
  51             fi
  52
  53             # check for untracked files
  54             if [ -n "$(git ls-files --others --exclude-standard)" ]; then
  55                 s="$s%";
  56             fi
  57
  58             # check for stashed files
  59             if $(git rev-parse --verify refs/stash &>/dev/null); then
  60                 s="$s$";
  61             fi
  62
  63         fi
  64
  65         # get the short symbolic ref
  66         # if HEAD isn't a symbolic ref, get the short SHA
  67         # otherwise, just give up
  68         branchName="$(git symbolic-ref --quiet --short HEAD 2> /dev/null || \
  69                       git rev-parse --short HEAD 2> /dev/null || \
  70                       printf "(unknown)")"
  71
  72         [ -n "$s" ] && s=" [$s]"
  73         printf "%s" "$branchName$s "
  74     fi
  75 }
  76
  77 set_prompts() {
  78       OPS1=''
  79       # display the user, host and current working directory
  80       # in the terminal title
  81       case "$TERM" in
  82          *rxvt*|screen*|*term*|vt100)
  83             OPS1+="\[\033]0;${debian_chroot:+($debian_chroot)}\u@\h:\w\007\]"
  84             case "$TERM" in
  85                screen*)
  86                   OPS1+="\[\033k${debian_chroot:+($debian_chroot)}"
  87                   OPS1+="\u@\h:\w\033\\\\\]" # Set screen/tmux caption
  88                ;;
  89             esac
  90          ;;
  91
  92          *)
  93             OPS1=""
  94          ;;
  95       esac
  96
  97    OPS1+="${debian_chroot:+($debian_chroot)}"
  98    OPS1+="\`cgmem_which_prompt\`\u@\${HOSTNAME::5}:\`short_curdir\` "
  99    OPS1+="\$(prompt_git)"
 100    OPS1+="\\$\$SHLVL "
 101    export OPS1
 102 }