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 unstaged changes
  44             if [ -n "$(git ls-files --modified)" ]; then
  45                 s="$s*";
  46             fi
  47
  48             # check for uncommitted changes in the index
  49             if ! $(git diff --quiet --ignore-submodules --cached); then
  50                 s="$s+";
  51             fi
  52
  53             # check for stashed files
  54             if $(git rev-parse --verify refs/stash &>/dev/null); then
  55                 s="$s$";
  56             fi
  57
  58             # check for untracked files
  59             if [ -n "$(git ls-files --others --exclude-standard)" ]; 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         up=`git rev-parse --abbrev-ref @{u} 2>/dev/null`
  73         if [ -n "$up" -a "$up" != "@{u}" ]; then
  74             local left right
  75             set -- `git rev-list --count --left-right @{u}...HEAD`
  76             left=$1
  77             right=$2
  78             if [ "$left" -gt 0 ]; then
  79                 s="$s-$left"
  80             fi
  81             if [ "$right" -gt 0 ]; then
  82                 s="$s+$right"
  83             fi
  84         fi
  85
  86         [ -n "$s" ] && s=" $s"
  87         printf " (%s)" "$branchName$s"
  88     fi
  89 }
  90
  91 #if test -x /usr/bin/git >/dev/null 2>&1; then
  92 #   if [ "`type -t __git_ps1`" != function ]; then
  93 #      git_sh_prompt=`git --exec-path`/git-sh-prompt
  94 #      test -r $git_sh_prompt && . $git_sh_prompt || :
  95 #   fi
  96 #   if [ "`type -t __git_ps1`" = function ]; then
  97 #      GIT_PS1_SHOWDIRTYSTATE=true
  98 #      GIT_PS1_SHOWSTASHSTATE=true
  99 #      GIT_PS1_SHOWUNTRACKEDFILES=true
 100 #      GIT_PS1_SHOWUPSTREAM=verbose
 101 #   fi
 102 #fi
 103
 104 set_prompts() {
 105       PS1=''
 106       local _COMMON_PROMPT='${debian_chroot:+($debian_chroot)}\u@\h:\w'
 107       # display the user, host and current working directory
 108       # in the terminal title
 109       case "$TERM" in
 110          *rxvt*|screen*|*term*|vt100)
 111             PS1="\[\033]0;${_COMMON_PROMPT}\007\]" # Set xterm title/icon
 112             case "$TERM" in
 113                screen*)
 114                   PS1="\[\033P\033]0;${_COMMON_PROMPT}\007\033\\\\\]" # Set xterm title/icon under screen/tmux
 115                   if [ -z "$MC_SID" ]; then
 116                      PS1+="\[\033k${_COMMON_PROMPT}\033\\\\\]" # Set screen/tmux caption
 117                   fi
 118                ;;
 119             esac
 120          ;;
 121
 122          *)
 123             PS1=""
 124          ;;
 125       esac
 126
 127    PS1+='${debian_chroot:+($debian_chroot)}'
 128    PS1+='`cgmem_which_prompt`\u@${HOSTNAME::5}:`short_curdir`'
 129    if test -x /usr/bin/git >/dev/null 2>&1; then
 130       #if [ "`type -t __git_ps1`" = function ]; then
 131       #   PS1+='$(__git_ps1)'
 132       #else
 133          PS1+='$(prompt_git)'
 134       #fi
 135    fi
 136    # This is for .screenrc: shelltitle "\$ |$SHELL"
 137    #PS1+='\[\033k\033\\\]'
 138    PS1+=' $SHLVL\$ '
 139    export PS1
 140 }