zsh-autosuggestions/src/async.zsh

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#--------------------------------------------------------------------#
# Async #
#--------------------------------------------------------------------#
_zsh_autosuggest_async_fetch_suggestion() {
local strategy_function="_zsh_autosuggest_strategy_$ZSH_AUTOSUGGEST_STRATEGY"
local prefix="$(_zsh_autosuggest_escape_command "$1")"
# Send the suggestion command to the pty to fetch a suggestion
zpty -w -n $ZSH_AUTOSUGGEST_PTY_NAME "$strategy_function '$prefix'"$'\0'
}
# Pty is spawned running this function
_zsh_autosuggest_async_suggestion_server() {
while read -d $'\0' cmd; do
# Kill last bg process
kill -KILL %1 &>/dev/null
# Run suggestion search in the background
print -n -- "$(eval "$cmd")"$'\0' &
done
}
# Called when new data is ready to be read from the pty
# First arg will be fd ready for reading
# Second arg will be passed in case of error
_zsh_autosuggest_async_suggestion_ready() {
# while zpty -rt $ZSH_AUTOSUGGEST_PTY_NAME suggestion 2>/dev/null; do
while read -u $_ZSH_AUTOSUGGEST_PTY_FD -d $'\0' suggestion; do
zle _autosuggest-show-suggestion "${suggestion//$'\r'$'\n'/$'\n'}"
done
}
# Recreate the pty to get a fresh list of history events
_zsh_autosuggest_async_recreate_pty() {
typeset -g _ZSH_AUTOSUGGEST_PTY_FD
# Kill the old pty
if [ -n "$_ZSH_AUTOSUGGEST_PTY_FD" ]; then
# Remove the input handler
zle -F $_ZSH_AUTOSUGGEST_PTY_FD
# Destroy the pty
zpty -d $ZSH_AUTOSUGGEST_PTY_NAME &>/dev/null
fi
# REPLY stores the fd to read from
typeset -h REPLY
# Start a new pty running the server function
zpty -b $ZSH_AUTOSUGGEST_PTY_NAME _zsh_autosuggest_async_suggestion_server
# Store the fd so we can destroy this pty later
_ZSH_AUTOSUGGEST_PTY_FD=$REPLY
# Set up input handler from the pty
zle -F $_ZSH_AUTOSUGGEST_PTY_FD _zsh_autosuggest_async_suggestion_ready
}
add-zsh-hook precmd _zsh_autosuggest_async_recreate_pty