dotfiles/zsh/.zshrc

#This program is free software: you can redistribute it and/or modify
#it under the terms of the GNU General Public License as published by
#the Free Software Foundation, either version 3 of the License, or
#(at your option) any later version.
#
#This program is distributed in the hope that it will be useful,
#but WITHOUT ANY WARRANTY; without even the implied warranty of
#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#GNU General Public License for more details.
#
#You should have received a copy of the GNU General Public License
#along with this program.  If not, see <http://www.gnu.org/licenses/>.


#set important shell variables
	export PATH="$PATH:$(ruby -e 'puts Gem.user_dir')/bin"
	export PATH="$PATH:$HOME/.local/bin"
	export PATH="$PATH:$HOME/scripts"
	#set default editor and pager.
	export EDITOR=nvim
	export VISUAL=nvim
	export PAGER=less
	#default options for less
	export LESS="-R"
	export LESSHISTFILE="/dev/null"
	#set the w3m homepage
	export WWW_HOME="duckduckgo.com/lite/"

#web_search from terminal
	function web_search() {
	  emulate -L zsh

	  # define search engine URLS
	  typeset -A urls
	  urls=(
		ddg         "https://www.duckduckgo.com/?q="
		github      "https://github.com/search?q="
	  )

	  # check whether the search engine is supported
	  if [[ -z "$urls[$1]" ]]; then
		echo "Search engine $1 not supported."
		return 1
	  fi

	  # search or go to main page depending on number of arguments passed
	  if [[ $# -gt 1 ]]; then
		# build search url:
		# join arguments passed with '+', then append to search engine URL
		url="${urls[$1]}${(j:+:)@[2,-1]}"
	  else
		# build main page url:
		# split by '/', then rejoin protocol (1) and domain (2) parts with '//'
		url="${(j://:)${(s:/:)urls[$1]}[1,2]}"
	  fi

	  open_command "$url"
	}

#prompt
	autoload -U promptinit
	promptinit
	autoload -U colors
	colors

	#stuff to show git things.
		autoload -Uz vcs_info

		setopt prompt_subst

		precmd_vcs() {vcs_info}

		#when not in a repo, show full path to current directory. when in one, show path from base direcory of the repo.
		zstyle ':vcs_info:*' nvcsformats '%~'
		zstyle ':vcs_info:*' formats '%r/%S %F{green}[%b]%f'

	#the precmd function, called just before printing the prompt. 
	function precmd() {
		precmd_vcs
	}

	#Make the right prompt blank, just to be sure.
	RPROMPT=

	#on the top line, show a whole bunch of info. botton line should be as minimal as possilbe (just a single char to  input next to...)
PROMPT='%F{cyan}[%n@%m]%f%F{red}├────┤%f${vcs_info_msg_0_}
»'

#show dots while waiting for tab-completion
	expand-or-complete-with-dots() {
		# toggle line-wrapping off and back on again
		[[ -n "$terminfo[rmam]" && -n "$terminfo[smam]" ]] && echoti rmam
		print -Pn "%{%F{red}......%f%}"
		[[ -n "$terminfo[rmam]" && -n "$terminfo[smam]" ]] && echoti smam

		zle expand-or-complete
		zle redisplay
	}
	zle -N expand-or-complete-with-dots
	bindkey "^I" expand-or-complete-with-dots

#misc
	# Enable the ZLE line editor, which is default behavior, but to be sure
	setopt ZLE
	#Enable vi mode for the ZLE. it should be set by default due to our EDITOR and VISUAL, but this is just to be safe.
	bindkey -v
	# Sends cd commands without the need for 'cd'
	setopt AUTO_CD
	# Kill all child processes when we exit, dont leave them running
	unsetopt NO_HUP
	#Allows comments in interactive shell.
	setopt INTERACTIVE_COMMENTS
	# Ctrl+S and Ctrl+Q usually disable/enable tty input. This disables those inputs
	unsetopt FLOW_CONTROL
	mkdir -p ~/.cache/zsh
	local zshCache=~/.cache/zsh

#ZSH history
	#make a history file outside our home directory
	HISTFILE=$zshCache/history
	#save a lot of history
	SAVEHIST=1000
	HISTSIZE=1000
	#save more information in history
	setopt EXTENDED_HISTORY
	#share history among zsh sessions
	setopt APPEND_HISTORY
	setopt SHARE_HISTORY
	#skip dupes when going through history
	setopt HIST_FIND_NO_DUPS
	#delete dupes first when histsize becomes full
	setopt HIST_EXPIRE_DUPS_FIRST
	#dont write dupes of the last command to histfile
	setopt HIST_IGNORE_DUPS
	#write history file as we type
	setopt INC_APPEND_HISTORY
	#remove extra whitespace from history
	setopt HIST_REDUCE_BLANKS

#autocomplete
	autoload -Uz compinit
	compinit
	#have the menu highlight while we cycle through options
	zstyle ':completion:*' menu select
	#case insensitive completion
	zstyle ':completion:*' matcher-list 'm:{a-z}={A-Z}'
	#allow completion from midword
	setopt COMPLETE_IN_WORD
	#move cursor to end of word after completing
	setopt ALWAYS_TO_END
	#complete aliases as well
	setopt COMPLETE_ALIASES
	#select first item when you press tab the first time.
	setopt MENU_COMPLETE

#globbing
	#case insensitive globbing
	setopt NO_CASE_GLOB
	#sort globs that expand to numbers by number rather than alphabeticly
	setopt NUMERIC_GLOB_SORT

#aliases
	alias vim="nvim"
	alias vimdiff="nvim -d"
	alias mutt="neomutt"
	alias fuck='sudo $(fc -ln -1)'
	alias la='ls -la'
	alias ll='ls -l'


	#web searches
	alias ddg='web_search ddg'
	alias github='web_search github'
	alias wiki='web_search ddg \!w'
	alias news='web_search ddg \!n'
	alias youtube='web_search ddg \!yt'
	alias map='web_search ddg \!m'
	alias image='web_search ddg \!i'

#setup grep to be a bit more nice
	local GREP_OPTIONS=""

	# color grep results
	GREP_OPTIONS+=" --color=auto"

	# ignore VCS folders (if the necessary grep flags are available)
	local VCS_FOLDERS="{.bzr,CVS,.git,.hg,.svn}"

	GREP_OPTIONS+=" --exclude-dir=$VCS_FOLDERS"
	GREP_OPTIONS+=" --exclude=$VCS_FOLDERS"

	# export grep settings
	alias grep="grep $GREP_OPTIONS"