Collection of various hacky bash functions

.bash_aliases

# quick apt commands
alias upd='sudo apt update && sudo apt list --upgradable'
alias upg='sudo apt upgrade -y && sudo apt autoremove -y'
alias ins='sudo apt install'
alias prg='sudo apt purge'
alias avail='apt policy'

# adding applications to dmenu
# first parameter: name of entry
# second parameter (for add): command to launch application
alias dm-add='sudo -v && dmenu-add'
alias dm-del='sudo -v && dmenu-del'

function dmenu-add() {
	if [[ $# -lt 2 ]]; then
		echo "missing parameters"
		exit 1
	fi
	ENTRY="/usr/bin/$1"
	sudo touch ${ENTRY}
	HEAD="#! /bin/bash"
	echo "${HEAD}" | sudo tee -a ${ENTRY} >/dev/null
	echo "$2" | sudo tee -a ${ENTRY} >/dev/null
	sudo chmod +x ${ENTRY}
	echo "added ${ENTRY}"
	sudo cat ${ENTRY}
	exec bash
}

function dmenu-del() {
	if [[ $# -lt 1 ]]; then
		echo "missing parameters"
		exit 1
	fi
	ENTRY="/usr/bin/$1"
	sudo rm ${ENTRY}
	echo "removed ${ENTRY}"
	exec bash
}

# simple timer (enter to split)
# can include parameter to show file contents
# REQ: bc
alias splits='shplit'

function shplit() {
    FORMAT="%s.%2N"
    STARTTIME=$(date +${FORMAT})
    #if [[ $# -eq 1 ]]; then
		#clear
		#case $1 in
		#	"parameter-name")
		#		cat file-name
		#		;;
		#	*)
		#		echo "no splits found"
		#		;;
		#esac
    #fi

    function format_duration {
        printf "%.2f" $1
    }

    function tick_time {
        DUR=$(format_duration $(bc <<< $(date +${FORMAT})-$STARTTIME))
        PRETTY_DUR=$(date +%T.%2N -u -d "@${DUR}")
        printf "\r%s " ${PRETTY_DUR}
    }

    function finish_up {
        tick_time
        echo
    }

    trap finish_up exit
    echo "End timing with ctrl-c."

    while true; do
        tick_time    
    done
}

# shows currently playing track
# works for music programs that change their window name to track name
# parameter is the name of the program
alias now-playing='nowplay'
 
function nowplay() {
    if [[ $# -ne 1 ]]; then
        echo 'invalid parameters'
        exit
    fi
   
    HEXID=$(wmctrl -l | grep -i $1 | awk '{print $1}')
    echo "found $1 - start playing now"
 
    function showplaying {
	clear
        TRACK=$(wmctrl -l | grep ${HEXID} | grep -o "$HOSTNAME.*" | sed "s/debian //g")
        printf "Now playing: %s\n" "${TRACK}"
    }
 
    while true; do
        sleep 5
        showplaying
    done
}

# automatically compiles TeX files and cleans up extra files
# REQ: texlive
alias tex-pdf='makepdf'

function makepdf() {
	for T in *.tex; do if ! [[ -f "${T%.*}.pdf" ]]; then xelatex ${T}; fi; done
	for A in *.aux; do rm ${A}; done
	for L in *.log; do rm ${L}; done
}

# download and display a LaTeX equation
# parameter is a LaTeX equation in double quotes
# REQ: fim
alias math='latex-png'

function latex-png() {
	curl -G "http://latex.codecogs.com/png.latex" --data-urlencode '\bg_white&space;\huge&space;'"$1" > image.png
	fim image.png &
	disown
	sleep 1
	rm image.png
}

# read markdown files in terminal
# REQ: pandoc, lynx
alias md='markdown'

function markdown() {
	pandoc "$1" | lynx -stdin;
}