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@rtfpessoa
Last active September 18, 2020 14:07
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Agnoster Bash Theme
#!/usr/bin/env bash
# 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)
# https://gist.github.com/kruton/8345450
#
# Updated & fixed by Erik Selberg erik@selberg.org 1/14/17
# Tested on MacOSX, Ubuntu, Amazon Linux
# Bash v3 and v4
#
# # README
#
# In order for this theme to render correctly, you will need a
# [Powerline-patched font](https://gist.github.com/1595572).
# I recommend: https://github.com/powerline/fonts.git
# > git clone https://github.com/powerline/fonts.git fonts
# > cd fonts
# > install.sh
# 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.
# Install:
# I recommend the following:
# $ cd home
# $ mkdir -p .bash/themes/agnoster-bash
# $ git clone https://github.com/speedenator/agnoster-bash.git .bash/themes/agnoster-bash
# then add the following to your .bashrc:
# export THEME=$HOME/.bash/themes/agnoster-bash/agnoster.bash
# if [[ -f $THEME ]]; then
# export DEFAULT_USER=`whoami`
# source $THEME
# fi
#
# # 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.
# Generally speaking, this script has limited support for right
# prompts (ala powerlevel9k on zsh), but it's pretty problematic in Bash.
# The general pattern is to write out the right prompt, hit \r, then
# write the left. This is problematic for the following reasons:
# - Doesn't properly resize dynamically when you resize the terminal
# - Changes to the prompt (like clearing and re-typing, super common) deletes the prompt
# - Getting the right alignment via columns / tput cols is pretty problematic (and is a bug in this version)
# - Bash prompt escapes (like \h or \w) don't get interpolated
#
# all in all, if you really, really want right-side prompts without a
# ton of work, recommend going to zsh for now. If you know how to fix this,
# would appreciate it!
# note: requires bash v4+... Mac users - you often have bash3.
# 'brew install bash' will set you free
PROMPT_DIRTRIM=2 # bash4 and above
######################################################################
DEBUG=0
debug() {
if [[ ${DEBUG} -ne 0 ]]; then
>&2 echo -e $*
fi
}
######################################################################
### Segment drawing
# A few utility functions to make it easy and re-usable to draw segmented prompts
CURRENT_BG='NONE'
CURRENT_RBG='NONE'
SEGMENT_SEPARATOR=''
RIGHT_SEPARATOR=''
LEFT_SUBSEG=''
RIGHT_SUBSEG=''
text_effect() {
case "$1" in
reset) echo 0;;
bold) echo 1;;
underline) echo 4;;
esac
}
# to add colors, see
# http://bitmote.com/index.php?post/2012/11/19/Using-ANSI-Color-Codes-to-Colorize-Your-Bash-Prompt-on-Linux
# under the "256 (8-bit) Colors" section, and follow the example for orange below
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;;
orange) echo 38\;5\;166;;
esac
}
bg_color() {
case "$1" in
black) echo 40;;
red) echo 41;;
green) echo 42;;
yellow) echo 43;;
blue) echo 44;;
magenta) echo 45;;
cyan) echo 46;;
white) echo 47;;
orange) echo 48\;5\;166;;
esac;
}
# TIL: declare is global not local, so best use a different name
# for codes (mycodes) as otherwise it'll clobber the original.
# this changes from BASH v3 to BASH v4.
ansi() {
local seq
declare -a mycodes=("${!1}")
debug "ansi: ${!1} all: $* aka ${mycodes[@]}"
seq=""
for ((i = 0; i < ${#mycodes[@]}; i++)); do
if [[ -n $seq ]]; then
seq="${seq};"
fi
seq="${seq}${mycodes[$i]}"
done
debug "ansi debug:" '\\[\\033['${seq}'m\\]'
echo -ne '\[\033['${seq}'m\]'
# PR="$PR\[\033[${seq}m\]"
}
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
debug "Prompting $1 $2 $3"
# if commented out from kruton's original... I'm not clear
# if it did anything, but it messed up things like
# prompt_status - Erik 1/14/17
# 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)
debug "Added $bg as background to codes"
fi
if [[ -n $2 ]]; then
fg=$(fg_color $2)
codes=("${codes[@]}" $fg)
debug "Added $fg as foreground to codes"
fi
debug "Codes: "
# declare -p codes
if [[ $CURRENT_BG != NONE && $1 != $CURRENT_BG ]]; then
declare -a intermediate=($(fg_color $CURRENT_BG) $(bg_color $1))
debug "pre prompt " $(ansi intermediate[@])
PR="$PR $(ansi intermediate[@])$SEGMENT_SEPARATOR"
debug "post prompt " $(ansi codes[@])
PR="$PR$(ansi codes[@]) "
else
debug "no current BG, codes is $codes[@]"
PR="$PR$(ansi codes[@]) "
fi
CURRENT_BG=$1
[[ -n $3 ]] && PR="$PR$3"
}
# End the prompt, closing any open segments
prompt_end() {
if [[ -n $CURRENT_BG ]]; then
declare -a codes=($(text_effect reset) $(fg_color $CURRENT_BG))
PR="$PR $(ansi codes[@])$SEGMENT_SEPARATOR"
fi
declare -a reset=($(text_effect reset))
PR="$PR $(ansi reset[@])"
CURRENT_BG=''
}
### virtualenv prompt
prompt_virtualenv() {
if [[ -n $VIRTUAL_ENV ]]; then
color=cyan
prompt_segment $color $PRIMARY_FG
prompt_segment $color white "$(basename $VIRTUAL_ENV)"
fi
}
### 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
}
# prints history followed by HH:MM, useful for remembering what
# we did previously
prompt_histdt() {
prompt_segment black default "\! [\A]"
}
git_status_dirty() {
dirty=$(git status -s 2> /dev/null | tail -n 1)
[[ -n $dirty ]] && echo " ●"
}
# 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 $dirty ]]; then
prompt_segment yellow black
else
prompt_segment green black
fi
PR="$PR${ref/refs\/heads\// }$dirty"
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"
}
######################################################################
#
# experimental right prompt stuff
# requires setting prompt_foo to use PRIGHT vs PR
# doesn't quite work per above
rightprompt() {
printf "%*s" $COLUMNS "$PRIGHT"
}
# quick right prompt I grabbed to test things.
__command_rprompt() {
local times= n=$COLUMNS tz
for tz in ZRH:Europe/Zurich PIT:US/Eastern \
MTV:US/Pacific TOK:Asia/Tokyo; do
[ $n -gt 40 ] || break
times="$times ${tz%%:*}\e[30;1m:\e[0;36;1m"
times="$times$(TZ=${tz#*:} date +%H:%M)\e[0m"
n=$(( $n - 10 ))
done
[ -z "$times" ] || printf "%${n}s$times\\r" ''
}
# PROMPT_COMMAND=__command_rprompt
# this doens't wrap code in \[ \]
ansi_r() {
local seq
declare -a mycodes2=("${!1}")
debug "ansi: ${!1} all: $* aka ${mycodes2[@]}"
seq=""
for ((i = 0; i < ${#mycodes2[@]}; i++)); do
if [[ -n $seq ]]; then
seq="${seq};"
fi
seq="${seq}${mycodes2[$i]}"
done
debug "ansi debug:" '\\[\\033['${seq}'m\\]'
echo -ne '\033['${seq}'m'
# PR="$PR\[\033[${seq}m\]"
}
# Begin a segment on the right
# Takes two arguments, background and foreground. Both can be omitted,
# rendering default background/foreground.
prompt_right_segment() {
local bg fg
declare -a codes
debug "Prompt right"
debug "Prompting $1 $2 $3"
# if commented out from kruton's original... I'm not clear
# if it did anything, but it messed up things like
# prompt_status - Erik 1/14/17
# 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)
debug "Added $bg as background to codes"
fi
if [[ -n $2 ]]; then
fg=$(fg_color $2)
codes=("${codes[@]}" $fg)
debug "Added $fg as foreground to codes"
fi
debug "Right Codes: "
# declare -p codes
# right always has a separator
# if [[ $CURRENT_RBG != NONE && $1 != $CURRENT_RBG ]]; then
# $CURRENT_RBG=
# fi
declare -a intermediate2=($(fg_color $1) $(bg_color $CURRENT_RBG) )
# PRIGHT="$PRIGHT---"
debug "pre prompt " $(ansi_r intermediate2[@])
PRIGHT="$PRIGHT$(ansi_r intermediate2[@])$RIGHT_SEPARATOR"
debug "post prompt " $(ansi_r codes[@])
PRIGHT="$PRIGHT$(ansi_r codes[@]) "
# else
# debug "no current BG, codes is $codes[@]"
# PRIGHT="$PRIGHT$(ansi codes[@]) "
# fi
CURRENT_RBG=$1
[[ -n $3 ]] && PRIGHT="$PRIGHT$3"
}
######################################################################
## Emacs prompt --- for dir tracking
# stick the following in your .emacs if you use this:
# (setq dirtrack-list '(".*DIR *\\([^ ]*\\) DIR" 1 nil))
# (defun dirtrack-filter-out-pwd-prompt (string)
# "dirtrack-mode doesn't remove the PWD match from the prompt. This does."
# ;; TODO: support dirtrack-mode's multiline regexp.
# (if (and (stringp string) (string-match (first dirtrack-list) string))
# (replace-match "" t t string 0)
# string))
# (add-hook 'shell-mode-hook
# #'(lambda ()
# (dirtrack-mode 1)
# (add-hook 'comint-preoutput-filter-functions
# 'dirtrack-filter-out-pwd-prompt t t)))
prompt_emacsdir() {
# no color or other setting... this will be deleted per above
PR="DIR \w DIR$PR"
}
######################################################################
## Main prompt
build_prompt() {
[[ ! -z ${AG_EMACS_DIR+x} ]] && prompt_emacsdir
prompt_status
#[[ -z ${AG_NO_HIST+x} ]] && prompt_histdt
[[ -z ${AG_NO_CONTEXT+x} ]] && prompt_context
prompt_virtualenv
prompt_dir
prompt_git
prompt_end
}
# from orig...
# export PS1='$(ansi_single $(text_effect reset)) $(build_prompt) '
# this doesn't work... new model: create a prompt via a PR variable and
# use that.
set_bash_prompt() {
RETVAL=$?
PR=""
PRIGHT=""
CURRENT_BG=NONE
PR="$(ansi_single $(text_effect reset))"
build_prompt
# uncomment below to use right prompt
# PS1='\[$(tput sc; printf "%*s" $COLUMNS "$PRIGHT"; tput rc)\]'$PR
PS1=$PR
}
PROMPT_COMMAND=set_bash_prompt
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