Changes to zsh history behavior and misc commands.

Local (in-memory) history works as before, but only successful commands
are commited to storage.

Prompt's preexec and precmd hooks no longer corrupt the namespace.

Zsh function http-dir now uses vanilla python3 instead of thttpd.

Removed aliases/functions: cds, tomp4, swap-files.

etc/zsh/zshrc

@@ -131,18 +131,9 @@ wt-list_prefixes () {
 	ls $* $HOME/.local/share/wineprefixes/
 }
 
-cds () {
-	cd /mnt/data/$USER/$1
-}
-
 http-dir () {
 	echo "Serving $PWD on 0.0.0.0:55555"
-	/usr/sbin/thttpd -T utf-8 -D -d . -p 55555 -l -
-}
-
-swap-files () {
-	TMP=.swap-files.tmp
-	mv "$1" "$TMP" && mv "$2" "$1" && mv "$TMP" "$2"
+	python3 -m http.server 55555
 }
 
 function die () {
@@ -150,17 +141,6 @@ function die () {
 	exit 1
 }
 
-function tomp4 () {
-	__TOMP4_INPUT="${1}"
-	__TOMP4_OUTPUT="${1%%.*}.mp4"
-	
-	ffmpeg -i "file:${__TOMP4_INPUT}" -codec:v copy -codec:a copy "${__TOMP4_OUTPUT}"
-}
-
-function toTelegram () {
-	over-video --container mp4 --video x264 --video-preset slow --video-quality 22 --no-normalize --audio vorbis --move-source "" +F "scale=1280:trunc(ow/a/2)*2" +A "${@}"
-}
-
 function mkvoid () {
 	__MKVOID_TARGET="$1"
 	__MKVOID_PATH="${__MKVOID_TARGET:P}"
@@ -206,14 +186,51 @@ setopt HIST_VERIFY               # Don't execute immediately upon history expans
 bindkey '\e[A' history-beginning-search-backward # completion from history with Up/Down keys
 bindkey '\e[B' history-beginning-search-forward  #
 
+# 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
+	fi
+}
+
+function preexec () {
+	if [[ ! -v OVER_PROMPT_DISABLED ]]; then
+		__over_prompt_preexec || export OVER_PROMPT_DISABLED=1
+	fi
+}
+
+# general settings
 setopt EXTENDED_GLOB
-unsetopt NO_CLOBBER # prevents cat < file > file
+unsetopt NO_CLOBBER # prevents cat < file > file but gets in the way
 unsetopt CORRECTALL # hell no
 setopt NO_BEEP # hell no
 unsetopt equals # allows me to use strings like =this without escaping
-export ZLE_REMOVE_SUFFIX_CHARS=$' \t\n;&' # don't remove these chars after completion
 
 # File completion
+export ZLE_REMOVE_SUFFIX_CHARS=$' \t\n;&' # don't remove these chars after completion
 setopt AUTOLIST
 setopt NO_LIST_AMBIGUOUS # list files immediately
 setopt LIST_PACKED

lib/prompt-init

@@ -6,21 +6,21 @@ if [[ -a "$OVER_PROMPT_CFG" ]]; then
 	source "$OVER_PROMPT_CFG"
 fi
 
-function set_title {
+function __over_prompt_set_title {
 	if [[ ${TERM} =~ "screen" ]]; then
 		print -Pn "\033k\033${@}\033\134"
 	fi
 }
 
-function preexec {
+function __over_prompt_preexec {
 	local -a cmd
 	cmd=(${(z)1})
 	
-	set_title "${USER}: ${PWD} -> ${cmd}"
+	__over_prompt_set_title "${USER}: ${PWD} -> ${cmd}"
 }
 
-function precmd {
-	set_title "${USER}: ${PWD}"
+function __over_prompt_precmd {
+	__over_prompt_set_title "${USER}: ${PWD}"
 	python3 /usr/share/over-env/prompt.py "${COLUMNS}" "${PWD}" "${OVER_PROMPT_LAST_REFRESH}" "${OVER_PROMPT_SYSLOAD_WARN:=1.25}" "${OVER_PROMPT_SYSLOAD_YELL:=3.0}" "${OVER_PROMPT_FREESPACE_WARN:=0.15}" "${OVER_PROMPT_FREESPACE_YELL:=0.05}"
 	PS1="$(print "%(?.%{\e[1;36m%}.%{\e[1;31m%}%?%{\e[0m%}:%{\e[1;31m%})%(\!.#.$)%{\e[0m%} ")"
 	OVER_PROMPT_LAST_REFRESH=$(date +%s)