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60eb78630dAdd ZSH_THEME_ASYNC_PROMPT_OLD_PREFIX and ZSH_THEME_ASYNC_PROMPT_OLD_SUFFIX for themes to use. Signed-off-by: Olivier Mehani <olivier.mehani@learnosity.com>
42 lines
1 KiB
Bash
42 lines
1 KiB
Bash
# Asynchronous prompt heavily based on Anish Athalye's [0]
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# [0[ https://www.anishathalye.com/2015/02/07/an-asynchronous-shell-prompt/
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#
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# To use in your theme, define an `rprompt` function that echoes whatever you
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# want to have on the right-hand-side prompt.
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#
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setopt prompt_subst # enable command substition in prompt
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ASYNC_PROC=0
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function precmd() {
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function async() {
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# save to temp file
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printf "%s" "$(rprompt)" > "/tmp/zsh_prompt_$$"
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# signal parent
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kill -s USR1 $$
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}
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# do not clear RPROMPT, let it persist
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RPROMPT="${ZSH_THEME_ASYNC_PROMPT_OLD_PREFIX}${RPROMPT}${ZSH_THEME_ASYNC_PROMPT_OLD_SUFFIX}"
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# kill child if necessary
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if [[ "${ASYNC_PROC}" != 0 ]]; then
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kill -s HUP $ASYNC_PROC >/dev/null 2>&1 || :
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fi
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# start background computation
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async &!
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ASYNC_PROC=$!
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}
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function TRAPUSR1() {
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# read from temp file
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RPROMPT="$(cat /tmp/zsh_prompt_$$)"
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# reset proc number
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ASYNC_PROC=0
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# redisplay
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zle && zle reset-prompt
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}
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