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powerlevel10k/internal/worker.zsh
2020-01-17 19:14:28 +01:00

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# invoked in worker: _p9k_worker_main <timeout>
function _p9k_worker_main() {
local _p9k_worker_buf _p9k_worker_cmd
while true; do
if sysread -t $1 '_p9k_worker_buf[$#_p9k_worker_method+1]'; then
_p9k_worker_cmd=${_p9k_worker_buf%%$'\x1e'*}
if (( $#_p9k_worker_cmd != $#_p9k_worker_buf )); then
_p9k_worker_buf[1,$#_p9k_worker_cmd+1]=""
eval $_p9k_worker_cmd
fi
else
(( $? == 4 )) || return
(( $+functions[_p9k_worker_on_timeout] )) && _p9k_worker_on_timeout
fi
done
}
typeset -g _p9k__worker_pid
typeset -g _p9k__worker_req_fd
typeset -g _p9k__worker_resp_fd
typeset -g _p9k__worker_shell_pid
typeset -g _p9k__worker_file_prefix
typeset -ga _p9k__worker_params
typeset -gA _p9k__worker_functions
typeset -gA _p9k__worker_requests
# invoked in master: _p9k_worker_reply <list>...
#
# worker also has _p9k_worker_reply but its implemented as _p9k_worker_reply_remote
function _p9k_worker_reply() { eval $1 }
# invoked in worker where it's called _p9k_worker_reply
# usage: _p9k_worker_reply <list>
function _p9k_worker_reply_remote() { print -rn -- e$1$'\x1e' }
# invoked in worker: _p9k_worker_done <request-id>
function _p9k_worker_done() { print -rn -- d$1$'\x1e' }
# invoked in master: _p9k_worker_eval <list>
function _p9k_worker_eval() {
print -rnu $_p9k__worker_req_fd -- $1$'\x1e' && return
_p9k_worker_stop
return 1
}
# invoked in master: _p9k_worker_send_params [param]...
function _p9k_worker_send_params() {
[[ -z $_p9k__worker_resp_fd || $# == 0 ]] && return
if [[ -n $_p9k__worker_req_fd ]]; then
{
typeset -p -- $* && print -rn -- $'\x1e' && return
} >&$_p9k__worker_req_fd
_p9k_worker_stop
return 1
else
_p9k__worker_params+=($*)
fi
}
# invoked in master: _p9k_worker_invoke <request-id> <func> [arg]...
function _p9k_worker_invoke() {
if [[ -n $_p9k__worker_resp_fd ]]; then
if [[ -n $_p9k__worker_req_fd ]]; then
local req
if (( ! $+_p9k__worker_functions[$2] )); then
req+="function $2() { $functions[$2] ; }"$'\n'
_p9k__worker_functions[$2]=
fi
if (( ! $+_p9k__worker_requests[$1] )); then
req+="${(j: :)${(@q)${@:2}}}"$'\n'
_p9k__worker_requests[$1]=
else
_p9k__worker_requests[$1]="${(j: :)${(@q)${@:2}}}"
fi
if [[ -n $req ]]; then
_p9k_worker_eval $req"_p9k_worker_done ${(q)1}"
fi
else
_p9k__worker_functions[$2]=
_p9k__worker_requests[$1]="${(j: :)${(@q)${@:2}}}"
fi
else
"${@:2}"
fi
}
function _p9k_worker_cleanup() {
emulate -L zsh
setopt no_hist_expand extended_glob no_prompt_bang prompt_{percent,subst} no_aliases
[[ $_p9k__worker_shell_pid == $sysparams[pid] ]] && _p9k_worker_stop
return 0
}
function _p9k_worker_stop() {
emulate -L zsh
setopt no_hist_expand extended_glob no_prompt_bang prompt_{percent,subst} no_aliases
add-zsh-hook -D zshexit _p9k_worker_cleanup
[[ -n $_p9k__worker_resp_fd ]] && zle -F $_p9k__worker_resp_fd
[[ -n $_p9k__worker_resp_fd ]] && exec {_p9k__worker_resp_fd}>&-
[[ -n $_p9k__worker_req_fd ]] && exec {_p9k__worker_req_fd}>&-
[[ -n $_p9k__worker_pid ]] && kill -- -$_p9k__worker_pid 2>/dev/null
_p9k__worker_pid=
_p9k__worker_req_fd=
_p9k__worker_resp_fd=
_p9k__worker_shell_pid=
_p9k__worker_requests=()
_p9k__worker_functions=()
return 0
}
function _p9k_worker_receive() {
emulate -L zsh
setopt no_hist_expand extended_glob no_prompt_bang prompt_{percent,subst} no_aliases
{
(( $# <= 1 )) || return
local buf resp reset
while true; do
sysread -t 0 -i $_p9k__worker_resp_fd 'buf[$#buf+1]' && continue
(( $? == 4 )) || return
[[ $buf[-1] == (|$'\x1e') ]] && break
sysread -i $_p9k__worker_resp_fd 'buf[$#buf+1]' || return
done
for resp in ${(ps:\x1e:)buf}; do
local arg=$resp[2,-1]
case $resp[1] in
d)
local req=$_p9k__worker_requests[$arg]
if [[ -n $req ]]; then
_p9k__worker_requests[$arg]=
_p9k_worker_eval $req$'\n'"_p9k_worker_done ${(q)arg}" || return
else
unset "_p9k__worker_requests[$arg]"
fi
;;
e)
if (( start_time )); then
local -F end_time=EPOCHREALTIME
local -F3 latency=$((1000*(end_time-start_time)))
echo "latency: $latency ms" >>/tmp/log
start_time=0
fi
reset=1
() { eval $arg }
;;
s)
[[ -z $_p9k__worker_pid ]] || return
[[ $arg == <1-> ]] || return
_p9k__worker_pid=$arg
sysopen -w -o cloexec -u _p9k__worker_req_fd $_p9k__worker_file_prefix.fifo || return
{
print -r -- "
emulate -L zsh
setopt no_hist_expand extended_glob no_prompt_bang prompt_percent prompt_subst no_aliases
zmodload zsh/system
zmodload zsh/datetime
function _p9k_worker_reply() { $functions[_p9k_worker_reply_remote] }" || return
local f
for f in _p9k_worker_done _p9k_worker_main ${(k)_p9k__worker_functions}; do
print -r -- "function $f() { $functions[$f] }" || return
done
if (( $#_p9k__worker_params )); then
typeset -p -- $_p9k__worker_params || return
_p9k__worker_params=()
fi
local id list
for id list in "${(@kv)_p9k__worker_requests}"; do
print -rl -- $list "_p9k_worker_done ${(q)id}" || return
_p9k__worker_requests[$id]=
done
if (( _POWERLEVEL9K_EXPERIMENTAL_TIME_REALTIME )); then
print -r -- "
function _p9k_worker_on_timeout() { _p9k_worker_reply '' }
_p9k_worker_main 1" || return
else
print -r -- "_p9k_worker_main -1" || return
fi
print -rn -- $'\x1e' || return
} >&$_p9k__worker_req_fd
;;
*)
return 1
;;
esac
done
if (( reset ||
_POWERLEVEL9K_EXPERIMENTAL_TIME_REALTIME &&
_p9k__last_prompt_update_time < EPOCHREALTIME - 0.8 )); then
_p9k_reset_prompt
fi
return 0
} always {
(( $? )) && _p9k_worker_stop
}
}
function _p9k_worker_start() {
{
[[ -n $_p9k__worker_resp_fd ]] && return
_p9k__worker_file_prefix=${TMPDIR:-/tmp}/p10k.worker.$EUID.$$.$EPOCHSECONDS
if [[ -n $POWERLEVEL9K_WORKER_LOG_LEVEL ]]; then
local trace=x
local log_file=$file_prefix.log
else
local trace=
local log_file=/dev/null
fi
log_file=/tmp/log # todo: remove
trace=
local fifo=$_p9k__worker_file_prefix.fifo
local cmd=(
'emulate zsh'
'{ mkfifo '${(q)fifo}' && exec >&4 && echo -n "s$$\x1e" && exec 0<'${(q)fifo}' || exit } always { rm -f '${(q)fifo}' }'
'IFS= read -rd $'\''\x1e'\'' && eval $REPLY')
local setsid=${commands[setsid]:-/usr/local/opt/util-linux/bin/setsid}
[[ -x $setsid ]] && setsid=${(q)setsid} || setsid=
local zsh=${${:-/proc/self/exe}:A}
[[ -x $zsh ]] || zsh=zsh
cmd="$setsid ${(q)zsh} --nobgnice --noaliases -${trace}dfc ${(q)${(j:; :)cmd}} &!"
sysopen -r -o cloexec -u _p9k__worker_resp_fd <(
$zsh --nobgnice --noaliases -${trace}dfmc $cmd </dev/null 4>&1 &>>$log_file &!) || return
zle -F $_p9k__worker_resp_fd _p9k_worker_receive
_p9k__worker_shell_pid=$sysparams[pid]
add-zsh-hook zshexit _p9k_worker_cleanup
} always {
(( $? )) && _p9k_worker_stop
}
}
# todo: remove
function _p9k_reset_prompt() {
zle && zle reset-prompt && zle -R && _p9k__last_prompt_update_time=EPOCHREALTIME
}
emulate -L zsh -o prompt_subst # -o xtrace
POWERLEVEL9K_WORKER_LOG_LEVEL=DEBUG
_POWERLEVEL9K_EXPERIMENTAL_TIME_REALTIME=1
typeset -F _p9k__last_prompt_update_time
zmodload zsh/datetime
zmodload zsh/system
autoload -Uz add-zsh-hook
typeset -F start_time=EPOCHREALTIME
_p9k_worker_start
echo -E - $((1000*(EPOCHREALTIME-start_time)))
function compute_foo() {
local f="${(q+)1} ${(q+)bar} $((foo_counter++))"
_p9k_worker_reply "typeset -g foo=${(q)f}"
}
bar='rofl $ {'
_p9k_worker_send_params bar
() {
local -i i
for i in {1..10}; do
_p9k_worker_invoke f compute_foo $i
done
}
RPROMPT='$foo %*'
function in_worker() {
_p9k_worker_reply 'echo roundtrip: $((1000*(EPOCHREALTIME-'$1'))) >>/tmp/log'
}
_p9k_worker_invoke w in_worker $EPOCHREALTIME
# for i in {1..100}; do _p9k_worker_invoke w$i in_worker $EPOCHREALTIME; done