zsh: remove unused functions, add Sc=systemctl cat, tweak history a bit

etc/zsh/zshrc

@@ -41,7 +41,7 @@ alias gitc="git commit"
 alias gitp="git push"
 alias gitl="git log --shortstat --graph"
 alias gitd="git diff --word-diff"
-alias Y="noglob yt-dlp --no-mtime --no-check-certificate -f 'bestvideo[height<=1080]+bestaudio/best[height<=1080]'"
+alias Y="noglob yt-dlp --no-mtime --merge-output-format mkv --remux-video mkv --add-metadata --embed-subs --no-check-certificate -f 'bestvideo[height<=1080]+bestaudio/best[height<=1080]'"
 alias Ysound="noglob yt-dlp --no-mtime --no-check-certificate -f bestaudio --remux-video opus"
 alias battery="upower -i /org/freedesktop/UPower/devices/battery_BAT0"
 alias pp=python2
@@ -50,6 +50,7 @@ alias Ju="journalctl --unit"
 alias Jue="journalctl --pager-end --unit"
 alias Juf="journalctl --follow --unit"
 alias Ss="systemctl status --no-pager"
+alias Sc="systemctl cat"
 alias SE="systemctl enable"
 alias SD="systemctl disable"
 alias SS="systemctl start"
@@ -68,9 +69,6 @@ alias uSL="systemctl --user reload"
 alias uSX="systemctl --user stop"
 alias dmesg="dmesg -e"
 
-# apparently this is the only way of setting GNU Screen to UTF-8
-alias screen="screen -U"
-
 # Edit the current command line in $EDITOR
 export VISUAL="nano"
 autoload -U edit-command-line
@@ -85,17 +83,6 @@ mkcd () {
 	mkdir -p "$1" && cd "$1"
 }
 
-mkv-fixtitles () {
-	for arg in "$@"
-	do
-		title="${arg%%.[mM][kK][vV]}"
-		mkvpropedit "$arg" --set "title=$title" --edit track:v1 --delete name > /dev/null
-		if [ $? -ne 0 ]; then
-			echo "$arg failed"
-		fi
-	done
-}
-
 psg () { ps axu | grep -v grep | grep -i $* } # hledání v běžících procesech
 
 pskill () {
@@ -119,53 +106,16 @@ zres () {
 	hash -r
 }
 
-# kill GNU Screen pages in the specified range
-kill_screens () {
-	for p in {$1..$2}
-	do
-		screen -p $p -X stuff "exit\n"
-	done
-}
-
 http-dir () {
 	echo "Serving $PWD on 0.0.0.0:55555"
 	python3 -m http.server 55555
 }
 
-function die () {
+function failed_whike () {
-	echo "died during ${1}"
+	echo "failed while ${1}"
 	exit 1
 }
 
-function mkvoid () {
-	__MKVOID_TARGET="$1"
-	__MKVOID_PATH="${__MKVOID_TARGET:P}"
-	__MKVOID_DIR="${__MKVOID_PATH:h}"
-	__MKVOID_NAME="${__MKVOID_PATH:t}"
-	__MKVOID_ID="/dev/shm/void/${__MKVOID_PATH:l:gs/\///:gs/ //}"
-	
-	mkdir -p "/dev/shm/void" || die "mkdir void"
-	mkdir "${__MKVOID_ID}" || die "mkdir shm"
-	mkdir -p "${__MKVOID_DIR}" || die "mkdir fs"
-	ln -s "${__MKVOID_ID}" "${__MKVOID_PATH}" || die "ln"
-	pushd "${__MKVOID_PATH}" > /dev/null || die "pushd"
-	OVER_PROMPT_VOIDS="$OVER_PROMPT_VOIDS:$__MKVOID_NAME" zsh
-	popd > /dev/null
-	
-	while true; do
-		fuser -s "${__MKVOID_PATH}"
-		if [[ $? == 1 ]]; then
-			break
-		else
-			echo -n ">>> Waiting for other processes to abandon this void.\r"
-		fi
-		sleep 5
-	done
-	
-	rm -f "${__MKVOID_PATH}" || die "rm link"
-	rm -rf "${__MKVOID_ID}" || die "rm void"
-}
-
 # loop-shell COMMAND creates a shell that takes user_input and runs COMMAND user_input
 # e.g. "loop-shell grep -ri" creates a grepping shell
 function loop-shell {
@@ -182,34 +132,13 @@ HISTFILE=~/.history
 HISTSIZE=10000000
 SAVEHIST=10000000
 setopt HIST_IGNORE_SPACE # Don't record an entry starting with a space.
-setopt HIST_VERIFY               # Don't execute immediately upon history expansion.
+setopt INC_APPEND_HISTORY_TIME # Append to file immediately.
-bindkey '\e[A' history-beginning-search-backward # completion from history with Up/Down keys
+bindkey '\e[A' history-beginning-search-backward # Completion from history
-bindkey '\e[B' history-beginning-search-forward  #
+bindkey '\e[B' history-beginning-search-forward  # with Up/Down keys.
-
-# general prompt hooks incl. history management
-# (only commit successful commands, but cache all)
-# © http://scarff.id.au/blog/2019/zsh-history-conditional-on-command-success/
-function zshaddhistory() {
-	## called before a history line is saved.  See zshmisc(1).
-	
-	# Prevent the command from being written to history before it's
-	# executed; save it to LASTHIST instead.  Write it to history
-	# in precmd.
-	LASTHIST=$1
-	# Return value 2: "... the history line will be saved on the internal
-	# history list, but not written to the history file".
-	return 2
-}
 
 function precmd() {
 	## zsh hook called before the prompt is printed.  See zshmisc(1).
 	
-	# Write the last command if successful, using the history buffered by
-	# zshaddhistory().
-	if [[ $? == 0 && -n "$LASTHIST" && -n $HISTFILE ]] ; then
-		print -sr "${LASTHIST%%$'\n'}"
-	fi
-	
 	# over-prompt tie in
 	if [[ ! -v OVER_PROMPT_DISABLED ]]; then
 		__over_prompt_precmd || export OVER_PROMPT_DISABLED=1
@@ -224,8 +153,8 @@ function preexec () {
 
 # general settings
 setopt EXTENDED_GLOB
-unsetopt NO_CLOBBER # prevents cat < file > file but gets in the way
+setopt NO_CLOBBER # prevents cat < file > file
-unsetopt CORRECTALL # hell no
+unsetopt CORRECTALL # no
 setopt NO_BEEP # hell no
 unsetopt equals # allows me to use strings like =this without escaping