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# .zshrc
# Author: Piotr Karbowski <piotr.karbowski@gmail.com>
# License: beerware.

# Basic zsh config.
umask 077
ZDOTDIR=${ZDOTDIR:-${HOME}}
ZSHDDIR="${HOME}/.config/zsh.d"
HISTFILE="${ZDOTDIR}/.zsh_history"
HISTSIZE='10000'
SAVEHIST="${HISTSIZE}"
export EDITOR="/usr/bin/vim"
export TMP="$HOME/tmp"
export TEMP="$TMP"
export TMPDIR="$TMP"
export TMPPREFIX="${TMPDIR}/zsh"

if [ ! -d "${TMP}" ]; then mkdir "${TMP}"; fi

if ! [[ "${PATH}" =~ "^${HOME}/bin" ]]; then
export PATH="${HOME}/bin:${PATH}"
fi

# Not all servers have terminfo for rxvt-256color. :<
if [ "${TERM}" = 'rxvt-256color' ] && ! [ -f '/usr/share/terminfo/r/rxvt-256color' ] && ! [ -f '/lib/terminfo/r/rxvt-256color' ] && ! [ -f "${HOME}/.terminfo/r/rxvt-256color" ]; then
export TERM='rxvt-unicode'
fi

# Colors.
red='\e[0;31m'
RED='\e[1;31m'
green='\e[0;32m'
GREEN='\e[1;32m'
yellow='\e[0;33m'
YELLOW='\e[1;33m'
blue='\e[0;34m'
BLUE='\e[1;34m'
purple='\e[0;35m'
PURPLE='\e[1;35m'
cyan='\e[0;36m'
CYAN='\e[1;36m'
NC='\e[0m'

# Functions
if [ -f '/etc/profile.d/prll.sh' ]; then
. "/etc/profile.d/prll.sh"
fi

run_under_tmux() {
# Run $1 under session or attach if such session already exist.
# $2 is optional path, if no specified, will use $1 from $PATH.
# If you need to pass extra variables, use $2 for it as in example below..
# Example usage:
# torrent() { run_under_tmux 'rtorrent' '/usr/local/rtorrent-git/bin/rtorrent'; }
# mutt() { run_under_tmux 'mutt'; }
# irc() { run_under_tmux 'irssi' "TERM='screen' command irssi"; }


# There is a bug in linux's libevent...
# export EVENT_NOEPOLL=1

command -v tmux >/dev/null 2>&1 || return 1

if [ -z "$1" ]; then return 1; fi
local name="$1"
if [ -n "$2" ]; then
local file_path="$2"
else
local file_path="command ${name}"
fi

if tmux has-session -t "${name}" 2>/dev/null; then
tmux attach -d -t "${name}"
else
tmux new-session -s "${name}" "${file_path}" \; set-option status \; set set-titles-string "${name} (tmux@${HOST})"
fi
}

t() { run_under_tmux rtorrent; }
irc() { run_under_tmux irssi "TERM='screen' command irssi"; }

over_ssh() {
if [ -n "${SSH_CLIENT}" ]; then
return 0
else
return 1
fi
}

reload () {
          exec "${SHELL}" "$@"
}

escape_string() {
# Uber useful when you need to translate weird as fuck path into single-argument string.
local escape_string_input
echo -n "String to escape: "
read escape_string_input
_escaped_string="$(printf '%q' "$escape_string_input")"
if [ "$1" = '-o' ]; then
echo
echo "${_escaped_string}"
echo
else
export _escaped_string
echo "Escaped string has been pushed to \${_escaped_string} variable." 1>&2
fi
}

confirm() {
local answer
echo -ne "zsh: sure you want to run '${YELLOW}$@${NC}' [yN]? "
read -q answer
echo
if [[ "${answer}" =~ ^[Yy]$ ]]; then
command "${=1}" "${=@:2}"
else
return 1
fi
}

confirm_wrapper() {
if [ "$1" = '--root' ]; then
local as_root='true'
shift
fi

local runcommand="$1"; shift

if [ "${as_root}" = 'true' ] && [ "${USER}" != 'root' ]; then
runcommand="sudo ${runcommand}"
fi
confirm "${runcommand}" "$@"
}

poweroff() { confirm_wrapper --root $0 "$@"; }
reboot() { confirm_wrapper --root $0 "$@"; }
hibernate() { confirm_wrapper --root $0 "$@"; }

detox() {
if [ "$#" -ge 1 ]; then
confirm detox "$@"
else
command detox "$@"
fi
}

has() {
local string="${1}"
shift
local element=''
for element in "$@"; do
if [ "${string}" = "${element}" ]; then
return 0
fi
done
return 1
}

begin_with() {
local string="${1}"
shift
local element=''
for element in "$@"; do
if [[ "${string}" =~ "^${element}" ]]; then
return 0
fi
done
return 1

}

termtitle() {
case "$TERM" in
rxvt*|xterm|nxterm|gnome|screen|screen-*)
local prompt_host="${(%):-%m}"
local prompt_user="${(%):-%n}"
local prompt_char="${(%):-%~}"
case "$1" in
precmd)
printf '\e]0;%s@%s: %s\a' "${prompt_user}" "${prompt_host}" "${prompt_char}"
;;
preexec)
printf '\e]0;%s [%s@%s: %s]\a' "$2" "${prompt_user}" "${prompt_host}" "${prompt_char}"
;;
esac
;;
esac
}

git_check_if_worktree() {
# This function intend to be only executed in chpwd().
# Check if the current path is in git repo.

# We would want stop this function, on some big git repos it can take some time to cd into.
if [ -n "${skip_zsh_git}" ]; then
git_pwd_is_worktree='false'
return 1
fi
# The : separated list of paths where we will run check for git repo.
# If not set, then we will do it only for /root and /home.
if [ "${UID}" = '0' ]; then
# running 'git' in repo changes owner of git's index files to root, skip prompt git magic if CWD=/home/*
git_check_if_workdir_path="${git_check_if_workdir_path:-/root:/etc}"
else
git_check_if_workdir_path="${git_check_if_workdir_path:-/home}"
git_check_if_workdir_path_exclude="${git_check_if_workdir_path_exclude:-${HOME}/_sshfs}"
fi

if begin_with "${PWD}" ${=git_check_if_workdir_path//:/ }; then
if ! begin_with "${PWD}" ${=git_check_if_workdir_path_exclude//:/ }; then
local git_pwd_is_worktree_match='true'
else
local git_pwd_is_worktree_match='false'
fi
fi

if ! [ "${git_pwd_is_worktree_match}" = 'true' ]; then
git_pwd_is_worktree='false'
return 1
fi

# todo: Prevent checking for /.git or /home/.git, if PWD=/home or PWD=/ maybe...
# damn annoying RBAC messages about Access denied there.
if [ -d '.git' ] || [ "$(git rev-parse --is-inside-work-tree 2> /dev/null)" = 'true' ]; then
git_pwd_is_worktree='true'
git_worktree_is_bare="$(git config core.bare)"
else
unset git_branch git_worktree_is_bare
git_pwd_is_worktree='false'
fi
}

git_branch() {
git_branch="$(git symbolic-ref HEAD 2>/dev/null)"
git_branch="${git_branch##*/}"
git_branch="${git_branch:-no branch}"
}

git_dirty() {
if [ "${git_worktree_is_bare}" = 'false' ] && [ -n "$(git status --untracked-files='no' --porcelain)" ]; then
git_dirty='%F{green}*'
else
unset git_dirty
fi
}

precmd() {
# Set terminal title.
termtitle precmd

if [ "${git_pwd_is_worktree}" = 'true' ]; then
git_branch
git_dirty

git_prompt=" %F{blue}[%F{253}${git_branch}${git_dirty}%F{blue}]"
else
unset git_prompt
fi

# Maybe to be used someday, too annoying with vim and other interactive apps.
# # $REPORTTIME is about cpu time, not real time.
# if [ "${executed_on}" ]; then
# local current_timestamp=${(%):-'%D{%s}'}
# local last_cmd_took=$(( current_timestamp - executed_on ))
# if [ "${last_cmd_took}" -gt 60 ]; then
# printf "\n>>> [INFO] Execution took %ss\n\n" "$last_cmd_took"
# fi
# unset executed_on
# fi
}

preexec() {
# Set terminal title along with current executed command pass as second argument
termtitle preexec "${(V)1}"

# # Save timestamp when we executed this command
# executed_on=${(%):-'%D{%s}'}
}

chpwd() {
git_check_if_worktree
}

man() {
if command -v vimmanpager >/dev/null 2>&1; then
PAGER="vimmanpager" command man "$@"
else
command man "$@"
fi
}

# Are we running under grsecurity's RBAC?
rbac_auth() {
local auth_to_role='admin'
if [ "${USER}" = 'root' ]; then
if ! grep -qE '^RBAC:' "/proc/self/status" && command -v gradm > /dev/null 2>&1; then
echo -e "\n${BLUE}*${NC} ${GREEN}RBAC${NC} Authorize to '${auth_to_role}' RBAC role."
gradm -a "${auth_to_role}" && exec "${SHELL}" "$@"
fi
fi
}
#rbac_auth

# Check if we started zsh in git worktree, useful with tmux when your new zsh may spawn in source dir.
git_check_if_worktree
if [ "${git_pwd_is_worktree}" = 'true' ]; then
git_branch
git_dirty
git_prompt=" %F{blue}[%F{253}${git_branch}${git_dirty}%F{blue}]"
else
unset git_prompt
fi


# Le features!
# extended globbing, awesome!
setopt extendedGlob

# zmv - a command for renaming files by means of shell patterns.
autoload -U zmv

# zargs, as an alternative to find -exec and xargs.
autoload -U zargs

# Turn on command substitution in the prompt (and parameter expansion and arithmetic expansion).
setopt promptsubst

# Control-x-e to open current line in $EDITOR, awesome when writting functions or editing multiline commands.
autoload -U edit-command-line
zle -N edit-command-line
bindkey '^x^e' edit-command-line

# Include user-specified configs.
if [ ! -d "${ZSHDDIR}" ]; then
mkdir -p "${ZSHDDIR}" && echo "# Put your user-specified config here." > "${ZSHDDIR}/example.zsh"
fi

for zshd in $(ls -A ${HOME}/.config/zsh.d/^*.(z)sh$); do
. "${zshd}"
done

# Completion.
autoload -Uz compinit
compinit
zstyle ':completion:*' matcher-list 'm:{a-z}={A-Z}'
zstyle ':completion:*' completer _expand _complete _ignored _approximate
zstyle ':completion:*' menu select=2
zstyle ':completion:*' select-prompt '%SScrolling active: current selection at %p%s'
zstyle ':completion::complete:*' use-cache 1
zstyle ':completion:*:descriptions' format '%U%F{cyan}%d%f%u'

# If running as root and nice >0, renice to 0.
if [ "$USER" = 'root' ] && [ "$(cut -d ' ' -f 19 /proc/$$/stat)" -gt 0 ]; then
renice -n 0 -p "$$" && echo "# Adjusted nice level for current shell to 0."
fi

# Fancy prompt.
if over_ssh && [ -z "${TMUX}" ]; then
prompt_is_ssh='%F{blue}[%F{red}SSH%F{blue}] '
elif over_ssh; then
prompt_is_ssh='%F{blue}[%F{253}SSH%F{blue}] '
else
unset prompt_is_ssh
fi

case $USER in
root)
PROMPT='%B%F{cyan}%m%k %(?..%F{blue}[%F{253}%?%F{blue}] )${prompt_is_ssh}%B%F{blue}%1~${git_prompt}%F{blue} %# %b%f%k'
;;

*)
PROMPT='%B%F{blue}%n@%m%k %(?..%F{blue}[%F{253}%?%F{blue}] )${prompt_is_ssh}%B%F{cyan}%1~${git_prompt}%F{cyan} %# %b%f%k'

;;
esac

# Ignore lines prefixed with '#'.
setopt interactivecomments

# Ignore duplicate in history.
setopt hist_ignore_dups

# Prevent record in history entry if preceding them with at least one space
setopt hist_ignore_space

# Nobody need flow control anymore. Troublesome feature.
#stty -ixon
setopt noflowcontrol

# Fix for tmux on linux.
case "$(uname -o)" in
'GNU/Linux')
export EVENT_NOEPOLL=1
;;
esac

# Aliases
alias cp='cp -iv'
alias rcp='rsync -v --progress'
alias rmv='rsync -v --progress --remove-source-files'
alias mv='mv -iv'
alias rm='rm -iv'
alias rmdir='rmdir -v'
alias ln='ln -v'
alias chmod="chmod -c"
alias chown="chown -c"

if command -v colordiff > /dev/null 2>&1; then
alias diff="colordiff -Nuar"
else
alias diff="diff -Nuar"
fi

alias grep='grep --colour=auto'
alias egrep='egrep --colour=auto'
alias ls='ls --color=auto --human-readable --group-directories-first --classify'


# Keys.
case $TERM in
rxvt*|xterm*)
bindkey "^[[7~" beginning-of-line #Home key
bindkey "^[[8~" end-of-line #End key
bindkey "^[[3~" delete-char #Del key
bindkey "^[[A" history-beginning-search-backward #Up Arrow
bindkey "^[[B" history-beginning-search-forward #Down Arrow
bindkey "^[Oc" forward-word # control + right arrow
bindkey "^[Od" backward-word # control + left arrow
bindkey "^H" backward-kill-word # control + backspace
bindkey "^[[3^" kill-word # control + delete
;;

linux)
bindkey "^[[1~" beginning-of-line #Home key
bindkey "^[[4~" end-of-line #End key
bindkey "^[[3~" delete-char #Del key
bindkey "^[[A" history-beginning-search-backward
bindkey "^[[B" history-beginning-search-forward
;;

screen|screen-*)
bindkey "^[[1~" beginning-of-line #Home key
bindkey "^[[4~" end-of-line #End key
bindkey "^[[3~" delete-char #Del key
bindkey "^[[A" history-beginning-search-backward #Up Arrow
bindkey "^[[B" history-beginning-search-forward #Down Arrow
bindkey "^[Oc" forward-word # control + right arrow
bindkey "^[Od" backward-word # control + left arrow
bindkey "^H" backward-kill-word # control + backspace
bindkey "^[[3^" kill-word # control + delete
;;
esac

bindkey "^R" history-incremental-pattern-search-backward
bindkey "^S" history-incremental-pattern-search-forward

if [ -f ~/.alert ]; then echo '>>> Check ~/.alert'; fi
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