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Agnoster Bash Theme
# vim: ft=bash ts=2 sw=2 sts=2
#
# agnoster's Theme - https://gist.github.com/3712874
# A Powerline-inspired theme for BASH
#
# (Converted from ZSH theme by Kenny Root)
#
# # README
#
# In order for this theme to render correctly, you will need a
# [Powerline-patched font](https://gist.github.com/1595572).
#
# In addition, I recommend the
# [Solarized theme](https://github.com/altercation/solarized/) and, if you're
# using it on Mac OS X, [iTerm 2](http://www.iterm2.com/) over Terminal.app -
# it has significantly better color fidelity.
#
# # Goals
#
# The aim of this theme is to only show you *relevant* information. Like most
# prompts, it will only show git information when in a git working directory.
# However, it goes a step further: everything from the current user and
# hostname to whether the last call exited with an error to whether background
# jobs are running in this shell will all be displayed automatically when
# appropriate.
### Segment drawing
# A few utility functions to make it easy and re-usable to draw segmented prompts
CURRENT_BG='NONE'
SEGMENT_SEPARATOR=''
# SEGMENT_SEPARATOR='⮀'
# SEGMENT_SEPARATOR=$'\ue0b0'
SEGMENT_GIT_SEPARATOR=''
# SEGMENT_GIT_SEPARATOR='⭠'
text_effect() {
case "$1" in
reset) echo 0;;
bold) echo 1;;
underline) echo 4;;
esac
}
fg_color() {
case "$1" in
black) echo 30;;
red) echo 31;;
green) echo 32;;
yellow) echo 33;;
blue) echo 34;;
magenta) echo 35;;
cyan) echo 36;;
white) echo 37;;
esac
}
bg_color() {
case "$1" in
black) echo 40;;
red) echo 41;;
green) echo 42;;
yellow) echo 43;;
blue) echo 44;;
magenta) echo 45;;
cyan) echo 46;;
white) echo 47;;
esac;
}
ansi() {
local seq
declare -a codes=("${!1}")
seq=""
for ((i = 0; i < ${#codes[@]}; i++)); do
if [[ -n $seq ]]; then
seq="${seq};"
fi
seq="${seq}${codes[$i]}"
done
echo -ne '\[\033['${seq}'m\]'
}
ansi_single() {
echo -ne '\[\033['$1'm\]'
}
# Begin a segment
# Takes two arguments, background and foreground. Both can be omitted,
# rendering default background/foreground.
prompt_segment() {
local bg fg
declare -a codes
if [[ -z $1 || ( -z $2 && $2 != default ) ]]; then
codes=("${codes[@]}" $(text_effect reset))
fi
if [[ -n $1 ]]; then
bg=$(bg_color $1)
codes=("${codes[@]}" $bg)
fi
if [[ -n $2 ]]; then
fg=$(fg_color $2)
codes=("${codes[@]}" $fg)
fi
if [[ $CURRENT_BG != NONE && $1 != $CURRENT_BG ]]; then
declare -a intermediate=($(fg_color $CURRENT_BG) $(bg_color $1))
echo -ne " $(ansi intermediate[@])$SEGMENT_SEPARATOR$(ansi codes[@]) "
else
echo -ne "$(ansi codes[@]) "
fi
CURRENT_BG=$1
[[ -n $3 ]] && echo -n $3
}
# End the prompt, closing any open segments
prompt_end() {
if [[ -n $CURRENT_BG ]]; then
declare -a codes=($(text_effect reset) $(fg_color $CURRENT_BG))
echo -ne " $(ansi codes[@])$SEGMENT_SEPARATOR"
fi
declare -a reset=($(text_effect reset))
echo -ne " $(ansi reset[@])"
CURRENT_BG=''
}
### Prompt components
# Each component will draw itself, and hide itself if no information needs to be shown
# Context: user@hostname (who am I and where am I)
prompt_context() {
local user=`whoami`
if [[ $user != $DEFAULT_USER || -n $SSH_CLIENT ]]; then
prompt_segment black default "$user@\h"
fi
}
git_status_dirty() {
dirty=$(git status -s 2> /dev/null | tail -n 1)
[[ -n $dirty ]] && echo "*"
}
git_rebase_progress() {
NEXT_FILE=".git/rebase-apply/next"
LAST_FILE=".git/rebase-apply/last"
NEXT=$([[ -f $NEXT_FILE ]] && cat .git/rebase-apply/next 2>/dev/null)
LAST=$([[ -f $LAST_FILE ]] && cat .git/rebase-apply/last 2>/dev/null)
[[ -n $NEXT ]] && [[ -n $LAST ]] && echo "($NEXT/$LAST)"
}
# Git: branch/detached head, dirty status
prompt_git() {
local ref dirty
if $(git rev-parse --is-inside-work-tree >/dev/null 2>&1); then
ZSH_THEME_GIT_PROMPT_DIRTY='±'
dirty=$(git_status_dirty)
ref=$(git symbolic-ref HEAD 2> /dev/null) || ref="$(git show-ref --head -s --abbrev |head -n1 2> /dev/null)"
if [[ -n $dirty ]]; then
prompt_segment yellow black
else
prompt_segment green black
fi
progress=$(git_rebase_progress)
echo -n "${ref/refs\/heads\//$SEGMENT_GIT_SEPARATOR }$dirty $progress"
fi
}
# Dir: current working directory
prompt_dir() {
prompt_segment blue black '\w'
}
# Status:
# - was there an error
# - am I root
# - are there background jobs?
prompt_status() {
local symbols
symbols=()
[[ $RETVAL -ne 0 ]] && symbols+="$(ansi_single $(fg_color red))"
[[ $UID -eq 0 ]] && symbols+="$(ansi_single $(fg_color yellow))"
[[ $(jobs -l | wc -l) -gt 0 ]] && symbols+="$(ansi_single $(fg_color cyan))"
[[ -n "$symbols" ]] && prompt_segment black default "$symbols"
}
## Main prompt
build_prompt() {
RETVAL=$?
prompt_status
prompt_context
prompt_dir
prompt_git
prompt_end
}
prompt_ps1() {
export PS1="$(ansi_single $(text_effect reset))$(build_prompt)"
}
PROMPT_COMMAND=prompt_ps1
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