433 lines
12 KiB
Bash
433 lines
12 KiB
Bash
#!/bin/bash
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# An intelligent and non intrusive prompt for bash
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# Licensed under the AGPL version 3
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as
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# published by the Free Software Foundation, either version 3 of the
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# License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# 2012 (c) nojhan <nojhan@gmail.com>
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# 2012 (c) Aurelien Requiem <aurelien@requiem.fr> #major rewrite and adaptation
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# Below are function for having a flexible dynamic prompt for power user:
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# - display the battery level (if necessary), with colormap (if any battery attached)
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# - if necessary, prints a counter for jobs that are attached to the current
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# term (e.g. xterm &) or that are sleeping (e.g. Ctrl-z)
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# - display the load average, colored with a colormap
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# - displays the colored login@hostname
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# - when root displays in red
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# - when user displays in green
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# - displays the current path in blue
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# - when user, print the colored git branch name (if in a git repository):
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# red = some changes are not commited, and yellow in parenthesis any unpushed commits (if any)
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# yellow = some commits are not pushed. Number of commits in parenthesis
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# green = no changes or commits
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# Check for recent enough version of bash.
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[ -z "$BASH_VERSION" -o -z "$PS1" ] && return;
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bash=${BASH_VERSION%.*}; bmajor=${bash%.*}; bminor=${bash#*.}
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if [ $bmajor -lt 3 ] || [ $bmajor -eq 3 -a $bminor -lt 2 ]; then
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unset bash bmajor bminor
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return
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fi
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unset bash bmajor bminor
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BLACK="\[$(tput setaf 0)\]"
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GRAY="\[$(tput bold ; tput setaf 0)\]"
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LIGHT_GREY="\[$(tput setaf 7)\]"
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WHITE="\[$(tput bold ; tput setaf 7)\]"
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RED="\[$(tput setaf 1)\]"
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LIGHT_RED="\[$(tput bold ; tput setaf 1)\]"
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WARN_RED="\[$(tput setaf 0 ; tput setab 1)\]"
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CRIT_RED="\[$(tput bold; tput setaf 7 ; tput setab 1)\]"
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GREEN="\[$(tput setaf 2)\]"
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LIGHT_GREEN="\[$(tput bold ; tput setaf 2)\]"
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YELLOW="\[$(tput setaf 3)\]"
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LIGHT_YELLOW="\[$(tput bold ; tput setaf 3)\]"
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BLUE="\[$(tput setaf 4)\]"
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LIGHT_BLUE="\[$(tput bold ; tput setaf 4)\]"
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PURPLE="\[$(tput setaf 5)\]"
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PINK="\[$(tput bold ; tput setaf 5)\]"
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CYAN="\[$(tput setaf 6)\]"
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LIGHT_CYAN="\[$(tput bold ; tput setaf 6)\]"
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NO_COL="\[$(tput sgr0)\]"
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__CPUNUM=$(grep ^processor /proc/cpuinfo | wc -l)
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#################
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# Where are we? #
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#################
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__connection()
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{
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THIS_TTY=tty`ps aux | grep $$ | grep bash | awk '{ print $7 }'`
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SESS_SRC=`who | grep $THIS_TTY | awk '{ print $6 }'`
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# Are we in an SSH connexion?
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SSH_FLAG=0
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SSH_IP=${SSH_CLIENT%% *}
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if [ $SSH_IP ] ; then
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SSH_FLAG=1
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fi
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SSH2_IP=`echo $SSH2_CLIENT | awk '{ print $1 }'`
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if [ $SSH2_IP ] ; then
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SSH_FLAG=1
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fi
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if [ $SSH_FLAG -eq 1 ] ; then
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CONN="ssh"
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elif [ -z $SESS_SRC ] ; then
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CONN="lcl"
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elif [ $SESS_SRC = "(:0.0)" -o $SESS_SRC = "" ] ; then
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CONN="lcl"
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else
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CONN="tel"
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fi
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echo -ne $CONN
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}
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# Put the hostname if not locally connected
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# color it in cyan within SSH, and a warning red if within telnet
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# else diplay the host without color
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__host_color()
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{
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conn=$(__connection)
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ret="${NO_COL}"
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if [ "$conn" == "lcl" ] ; then
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ret="${ret}" # no hostname if local
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elif [ "$conn" == "ssh" ] ; then
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ret="${ret}@${LIGHT_CYAN}\h"
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elif [ "$conn" == "tel" ] ; then
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ret="${ret}@${WARN_RED}\h"
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else
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ret="${ret}@\h"
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fi
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echo -ne "${ret}${NO_COL}"
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}
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#####################################
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# Count the number of attached jobs #
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#####################################
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# Either attached running jobs (started with $ myjob &)
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# or attached stopped jobs (suspended with Ctrl-Z)
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__jobcount_color()
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{
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running=`jobs -r | wc -l | tr -d " "`
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stopped=`jobs -s | wc -l | tr -d " "`
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if [ $running != "0" -a $stopped != "0" ]
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then
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rep="${NO_COL}${YELLOW}${running}r${NO_COL}/${LIGHT_YELLOW}${stopped}s${NO_COL} "
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elif [ $running != "0" -a $stopped == "0" ]
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then
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rep="${NO_COL}${YELLOW}${running}r${NO_COL} "
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elif [ $running == "0" -a $stopped != "0" ]
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then
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rep="${NO_COL}${LIGHT_YELLOW}${stopped}s${NO_COL} "
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fi
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echo -ne "$rep"
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}
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######################
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# VCS branch display #
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######################
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# GIT #
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# Get the branch name of the current directory
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__git_branch()
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{
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if git rev-parse --git-dir >/dev/null 2>&1 && [ ! -z "`git branch`" ]; then
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echo -n "$(git branch 2>/dev/null | sed -n '/^\*/s/^\* //p;')"
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fi
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}
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# Set a color depending on the branch state:
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# - green if the repository is up to date
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# - yellow if there is some commits not pushed
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# - red if there is changes to commit
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__git_branch_color()
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{
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command -v git >/dev/null 2>&1 || return 1;
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branch=$(__git_branch)
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if [ ! -z "$branch" ] ; then
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git diff --quiet >/dev/null 2>&1
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GD=$?
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git diff --cached --quiet >/dev/null 2>&1
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GDC=$?
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has_commit=$(git rev-list --no-merges --count origin/${branch}..${branch} 2>/dev/null)
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if [ -z "$has_commit" ]; then
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has_commit=0
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fi
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if [ "$GD" -eq 1 -o "$GDC" -eq "1" ]; then
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if [ "$has_commit" -gt "0" ] ; then
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# changes to commit and commits to push
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ret=" ${RED}${branch}${NO_COL}(${YELLOW}$has_commit${NO_COL}) "
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else
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ret=" ${RED}${branch}${NO_COL} " # changes to commit
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fi
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else
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if [ "$has_commit" -gt "0" ] ; then
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# some commit(s) to push
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ret=" ${YELLOW}${branch}${NO_COL}(${YELLOW}$has_commit${NO_COL}) "
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else
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ret=" ${GREEN}${branch}${NO_COL} " # nothing to commit or push
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fi
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fi
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echo -ne "$ret"
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fi
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}
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# MERCURIAL #
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# Get the branch name of the current directory
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__hg_branch()
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{
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branch="$(hg branch 2>/dev/null)"
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if [ $? -eq 0 ] && [ ! -z "`hg branch`" ]; then
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echo -n "$(hg branch)"
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fi
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}
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# Set a color depending on the branch state:
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# - green if the repository is up to date
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# - red if there is changes to commit
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# - TODO: yellow if there is some commits not pushed
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__hg_branch_color()
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{
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command -v hg >/dev/null 2>&1 || return 1;
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branch=$(__hg_branch)
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if [ ! -z "$branch" ] ; then
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if [ $(hg status --quiet -n | wc -l | sed -e "s/ //g") = 0 ] ; then
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ret=" ${GREEN}${branch}${NO_COL} "
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else
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ret=" ${RED}${branch}${NO_COL} " # changes to commit
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fi
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echo -ne "$ret"
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fi
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}
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# SUBVERSION #
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# Get the branch name of the current directory
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# For the first level of the repository, gives the repository name
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__svn_branch()
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{
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if [ -d ".svn" ] ; then
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root=$(svn info --xml 2>/dev/null | grep "^<root>" | sed "s/^.*\/\([[:alpha:]]*\)<\/root>$/\1/")
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branch=$(svn info --xml 2>/dev/null | grep "^<url>" | sed "s/.*\/$root\/\([[:alpha:]]*\).*<\/url>$/\1/")
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if [[ "$branch" == "<url>"* ]] ; then
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echo -n $root
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else
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echo -n $branch
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fi
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fi
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}
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# Set a color depending on the branch state:
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# - green if the repository is up to date
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# - red if there is changes to commit
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# Note that, due to subversion way of managing changes,
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# informations are only displayed for the CURRENT directory.
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__svn_branch_color()
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{
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command -v svn >/dev/null 2>&1 || return 1;
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branch=$(__svn_branch)
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if [ ! -z "$branch" ] ; then
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commits=$(svn status | grep -v "?" | wc -l)
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if [ $commits = 0 ] ; then
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ret=" ${GREEN}${branch}${NO_COL} "
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else
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ret=" ${RED}${branch}${NO_COL}(${YELLOW}$commits${NO_COL}) " # changes to commit
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fi
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echo -ne "$ret"
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fi
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}
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##################
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# Battery status #
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##################
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# Get the battery status in percent
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# returns 1 if no battery support
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__battery()
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{
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command -v acpi >/dev/null 2>&1 || return 1;
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bat=`acpi --battery 2>/dev/null | sed "s/^Battery .*, \([0-9]*\)%.*$/\1/"`
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if [ "${bat}" == "" ] ; then
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return 1
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fi
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if [ ${bat} -lt 90 ] ; then
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echo -n "${bat}"
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return 0
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else
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return 1
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fi
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}
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# Compute a gradient of background/foreground colors depending on the battery status
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__battery_color()
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{
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bat=$(__battery)
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if [ "$?" = "1" ] ; then return; fi; # no battery support
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if [ "$bat" != "" ] ; then
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if [ ${bat} -gt 75 ]; then
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return; # nothing displayed above 75%
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fi
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ret="b${NO_COL}"
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if [ ${bat} -le 75 ] && [ ${bat} -gt 50 ] ; then
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ret="${ret}${LIGHT_GREEN} "
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elif [ ${bat} -le 40 ] && [ ${bat} -gt 20 ] ; then
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ret="${ret}${LIGHT_YELLOW} "
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elif [ ${bat} -le 20 ] && [ ${bat} -gt 10 ] ; then
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ret="${ret}${LIGHT_RED} "
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elif [ ${bat} -le 10 ] && ${bat} -gt 5 ] ; then
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ret="${ret}${WARN_RED} "
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else
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ret="${ret}${CRIT_RED} "
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fi
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echo -ne "${ret}${bat}%${NO_COL}"
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fi
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}
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###############
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# System load #
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###############
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# Get the load average
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__load()
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{
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load=$(awk '{print $1}' /proc/loadavg)
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echo -n "$load"
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}
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# Compute a gradient of background/forground colors depending on the battery status
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__load_color()
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{
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# Colour progression is important ...
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# bold gray -> bold green -> bold yellow -> bold red ->
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# black on red -> bold white on red
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#
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# Then we have to choose the values at which the colours switch, with
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# anything past yellow being pretty important.
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loadval=$(__load)
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load=$(echo $loadval | sed -E 's/(^0| .*|\.)//g;s/^0*//g' )
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if [ -z "$load" ]; then
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load=0
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fi
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let "load=$load/$__CPUNUM"
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if [ "$load" -ge "60" ]
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then
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ret="l${NO_COL}"
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if [ $load -lt 70 ] ; then
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ret="${ret}${LIGHT_GREY} "
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elif [ $load -ge 1 ] && [ $load -lt 80 ] ; then
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ret="${ret}${LIGHT_GREEN} "
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elif [ $load -ge 80 ] && [ $load -lt 95 ] ; then
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ret="${ret}${LIGHT_YELLOW} "
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elif [ $load -ge 95 ] && [ $load -lt 150 ] ; then
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ret="${ret}${LIGHT_RED} "
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elif [ $load -ge 150 ] && [ $load -lt 200 ] ; then
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ret="${ret}${WARN_RED} "
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else
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ret="${ret}${CRIT_RED} "
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fi
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ret="${ret}$load%${NO_COL} "
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echo -ne "${ret}"
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fi
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}
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# Set the prompt mark to ± if VCS, # if root and else $
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__smart_mark()
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{
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if [ "$EUID" -ne "0" ]
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then
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if [ ! -z $(__git_branch) ] || [ ! -z $(__hg_branch) ] || [ ! -z $(__svn_branch) ]; then
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echo -ne "${WHITE}±${NO_COL}"
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else
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echo -ne "${WHITE}\\\$${NO_COL}"
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fi
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else
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echo -ne "${RED}#${NO_COL}"
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fi
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}
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__return_value()
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{
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if [ "$1" -ne "0" ]
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then
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echo -ne " ${NO_COL}${PURPLE}$1${NO_COL}"
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fi
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}
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__set_bash_prompt()
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{
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__RETURN="`__return_value $?`"
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__LOAD="`__load_color`"
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__JOBS="`__jobcount_color`"
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__BATT="`__battery_color`"
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__GIT="`__git_branch_color`"
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__HG="`__hg_branch_color`"
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__SVN="`__svn_branch_color`"
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__HOST="`__host_color`"
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__PROMPT="`__smart_mark`"
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PS1="${__BATT}${__LOAD}${__JOBS}"
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if [ "$EUID" -ne "0" ]
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then
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PS1="${PS1}[${LIGHT_GREY}\u${NO_COL}${__HOST}:${WHITE}\w${NO_COL}]"
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PS1="${PS1}${__GIT}${__HG}${__SVN}"
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else
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PS1="${PS1}[${LIGHT_YELLOW}\u${__HOST}${NO_COL}:${YELLOW}\w${NO_COL}]"
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fi
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PS1="${PS1}${__RETURN}${__PROMPT} "
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# Glue the bash prompt always go to the first column .
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# Avoid glitches after interrupting a command with Ctrl-C
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PS1="\[\033[G\]${PS1}${NO_COL}"
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}
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########################
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# Construct the prompt #
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########################
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PROMPT_COMMAND=__set_bash_prompt
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