.bashrc

# shellcheck shell=bash disable=SC1091,SC2034,SC2139

# If not running interactively, don't do anything
if [[ $- != *i* ]]; then
  return
fi

## show greeter
# -----------------------------------------------------------------------------

# if not in vim or ranger show reminders for today
if [[ -z $VIMRUNTIME && -z $RANGER_LEVEL && -n $(type -t when) ]]; then
  when --wrap=78 --noheader --styled_output_if_not_tty w | sed 's/^/│ /' |
    xargs -r0 printf "┌─[ Reminders ]\\n%s└$(printf '%0.s─' {0..22})\\n"
fi

## build prompt
# -----------------------------------------------------------------------------

boldblue='\e[1;34m'
boldred='\e[1;31m'
white='\e[37m'
reset='\e[m'

# echo return code on failure
returncode="\$(exit=\$?; [[ \$exit -ne 0 ]] && echo \"$boldred\$exit \")"
# root user is red, other users are blue
user="\$([[ \$EUID -eq 0 ]] && echo \"$boldred\"\u || echo \"$boldblue\"\u)"
dir="$reset@\h $white\w$reset"

# prompt stuff that should come before and after git integration
firstline=$returncode$user$dir
secondline='\n> '

# integrate git into prompt via PROMPT_COMMAND
if [[ -r /usr/share/git/git-prompt.sh ]]; then
  source /usr/share/git/git-prompt.sh
  GIT_PS1_SHOWCOLORHINTS=1
  # when using PROMPT_COMMAND we have to manually integrate python virtualenvs
  firstline=\$VIRTUAL_ENV_PROMPT$firstline
  PROMPT_COMMAND="__git_ps1 '$firstline' '$secondline';"
else
  # if git-promt.sh doesn't exist create prompt directly with PS1
  PS1="$firstline$secondline"
fi

PS2="» "

unset boldblue boldred white reset returncode user dir firstline secondline

## general shell behavior
# -----------------------------------------------------------------------------

shopt -s histappend                 # append history on exit, don't overwrite
shopt -s lithist                    # Save multi-line cmd with embedded newline
shopt -s checkwinsize               # Update col/lines after commands
shopt -s checkjobs                  # defer exit if jobs are running
shopt -s autocd                     # Can change dir without `cd`
shopt -s cdspell                    # Fixes minor spelling errors in cd paths
shopt -s no_empty_cmd_completion    # Stops empty line tab comp
shopt -s dirspell                   # Tab comp can fix dir name typos
shopt -s globstar                   # pattern ** also searches subdirectories
shopt -s extglob                    # enable extended pattern matching features

# reset cursor shape before executing a command (see .config/readline/inputrc)
if [[ $TERM = linux ]]; then
  PS0="\e[?8c"
else
  PS0="\e[2 q"
fi

# bash history stuff
HISTSIZE=5000
HISTFILESIZE=inf
HISTTIMEFORMAT="%d/%m/%y %T "
HISTCONTROL=ignoreboth:erasedups
# don't append wifi passwords to history file
HISTIGNORE="nmcli d* w* [ch]* * password *"
PROMPT_COMMAND+="history -a;"

## Aliases
# -----------------------------------------------------------------------------

# bring color to the terminal
alias ls='ls --color=auto -v'
alias la='ls --color=auto -vla'
alias ll='ls --color=auto -vl'
alias lh='ls --color=auto -vhAl'
alias diff='diff --color=auto'
alias grep='grep --color=auto'
alias ip='ip -color=auto'
alias info="info --vi-keys -v match-style=underline,bold,nocolor \
  -v link-style=yellow -v active-link-style=yellow,bold"

# other useful aliases
alias pac='pacman'
alias spac='sudo pacman'
alias apac='yay -a --editmenu'
alias pacli='pacman -Q | wc -l'
alias pacro='pacman -Qtd > /dev/null && sudo pacman -Rns $(pacman -Qtdq)'
alias calc='ptpython -i <(echo "from math import *; from statistics import *")'
alias todo='$EDITOR +sil\ /^##\ $(date +%A) +noh +norm\ zz ~/Documents/TODO.md'
alias {vim,nvim}="$EDITOR"
alias ring="printf '\a'"
alias server='python3 -m http.server 9999'
alias {dotfiles,dofi}='git --git-dir=$HOME/.dotfiles --work-tree=$HOME'
alias rec='ffmpeg -f x11grab -i $DISPLAY -f pulse -i default -y'
alias backup="sudo snap-sync --config home --noconfirm --UUID \
  \"\$(lsblk -no UUID /dev/disk/by-label/backup)\""

# fun stuff
alias starwars='telnet towel.blinkenlights.nl'
alias maps='telnet mapscii.me'
alias 2048='ssh play@ascii.town'
alias tron='ssh sshtron.zachlatta.com'
alias nyancat="mpv --no-terminal --no-video --loop ytdl://QH2-TGUlwu4 & \
  telnet rainbowcat.acc.umu.se; kill %%"

## Bash-completions
# -----------------------------------------------------------------------------

if [[ -r /usr/share/bash-completion/bash_completion ]]; then
  source /usr/share/bash-completion/bash_completion
fi

# sourcing order is important, see
# https://github.com/cykerway/complete-alias/issues/46
if [[ -n $(type -t fzf) ]]; then
  eval "$(fzf --bash)"
fi

# external alias completion, progcomp_alias shopt builtin sadly doesn't work
# https://github.com/scop/bash-completion/issues/383
if [[ -r /usr/share/bash-complete-alias/complete_alias ]]; then
  COMPAL_AUTO_UNMASK=1
  source /usr/share/bash-complete-alias/complete_alias
  complete -F _complete_alias "${!BASH_ALIASES[@]}"
fi

## FZF config for interactive use
# -----------------------------------------------------------------------------

if [[ -n $(type -t fzf) ]]; then
  # syntax highlight matches and preview directories
  FZF_COMPLETION_OPTS="--preview '{ pygmentize -f terminal {} || cat {} ||
    tree -C {}; } 2> /dev/null | head -200'"
  # To apply the command to CTRL-T as well
  FZF_CTRL_T_OPTS="$FZF_COMPLETION_OPTS"
  # Preview directories with tree
  FZF_ALT_C_OPTS="--preview 'tree -C {} | head -200'"
  # preview long commands with "?"
  FZF_CTRL_R_OPTS="--preview 'echo {}' --preview-window down:3:hidden:wrap \
    --bind '?:toggle-preview'"

  # https://github.com/junegunn/fzf/blob/master/ADVANCED.md#ripgrep-integration
  function lgrep(){
    rm -f /tmp/rg-fzf-{r,f}
    local rg_prefix="rg --column --line-number --no-heading --color=always"
    rg_prefix+=" --smart-case --hidden --glob '!{.git,node_modules,.venv}'"
    local switch='%s(change)+change-prompt(%s> )+%s+transform-query:"'
    switch+='echo \{q} > /tmp/rg-fzf-%s; cat /tmp/rg-fzf-%s\n'

    fzf --ansi --multi --disabled --query "${*:-}" \
      --bind "start:reload:$rg_prefix {q} || true" \
      --bind "change:reload:sleep 0.1; $rg_prefix {q} || true" \
      --bind "ctrl-t:transform:[[ ! \$FZF_PROMPT =~ regex ]] &&
        printf ${switch@Q} rebind regex disable-search f r ||
        printf ${switch@Q} unbind fuzzy enable-search r f" \
      --color "hl:-1:underline,hl+:-1:underline:reverse" \
      --prompt 'regex> ' \
      --delimiter : \
      --header 'ctrl-t to switch between fuzzy/regex search' \
      --preview "pygmentize -f terminal {1} || cat {1}" \
      --preview-window 'up,60%,border-bottom,+{2}+3/3,~3' \
      --bind "enter:become($EDITOR {+1} +{2})"
  }
fi

## Functions
# -----------------------------------------------------------------------------

# colored manpages
function man(){
  GROFF_NO_SGR=1 \
  LESS_TERMCAP_md=$'\e[01;31m' \
  LESS_TERMCAP_me=$'\e[0m' \
  LESS_TERMCAP_se=$'\e[0m' \
  LESS_TERMCAP_so=$'\e[01;44;33m' \
  LESS_TERMCAP_ue=$'\e[0m' \
  LESS_TERMCAP_us=$'\e[01;32m' \
  command man "$@"
}

# report disk usage of directory and sort files by size
function dusort(){
  find "$@" -mindepth 1 -maxdepth 1 -exec du -sch {} + | sort -h
}

# tldr version of man pages
function tldr(){
  local IFS=-
  curl cheat.sh/"$*"
}

# list package which owns command
function whoowns(){
  pacman -Qo "$@" 2> /dev/null || pacman -F "$@"
}

# list commands which are provided by package
function listprogs(){
  pacman -Qlq "$@" | grep -F "${PATH//:/$'\n'}" | sed -rn 's|.*/([^/]+)$|\1|p'
}

# find fonts which contain character(s)
function findfonts(){
  fc-list ":charset=$(printf "%x " "${@/#/\'}")" family style
}

# fetch current weather report, with location as optional parameter
function weather(){
  local request="wttr.in/${*^}?Fm"
  if [[ "$(tput cols)" -lt 125 ]]; then
    request+='n'
  fi
  curl -H "Accept-Language: ${LANG%_*}" --compressed "${request// /+}"
}

# Conveniently copy files to NAS
function ncp(){
  rsync --info=progress2 --recursive --protect-args --times --perms \
    --chmod=D775,F664 "${1%/}" "${2:+NAS:/media/storage/$2}"
}

## window title and current working directory
# -----------------------------------------------------------------------------

# advise the terminal of the current working directory
PROMPT_COMMAND+='printf "\e]7;file://%s%s\e\\" "$HOSTNAME" "$PWD";'

# set window title to currently running command or current working directory
PROMPT_COMMAND+='[ -n "$BASH_COMMAND" ] && printf "\e]0;%s\a" "$PWD";'
trap 'printf "\e]0;%s\a" "${BASH_COMMAND//[^[:print:]]/}"' DEBUG