Zsh Mailing List Archive
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Re: Look for git info in background

On Feb 17,  1:05am, Teto wrote:
} I would like to display the prompt as soon as I know if the folder is
} a git repo or not so that I can enter commands in the prompt. I would
} like zsh to retrieve that info (number of commtis ahead of upstream
} etc...) in background and update my prompt when the information
} becomes available.
} has anyone some code for that, I couldn't find anything ?

Hmm.  Something like this:

  autoload -Uz vcs_info

  vcs_update_info () {
    eval $(read -rE -u$1)		# Receive and run typeset
    zle -F $1				# Remove the handler
    exec {1}>&-				# Close the descriptor
    zle reset-prompt
  zle -N vcs_update_info

  chpwd() {
    if zle -l vcs_update_info
      typeset -g vcs_info_msg_0_= vcs_info_fd=

  precmd() {
    if zle -l vcs_update_info
      # NO_monitor / disown is to silence background job notices
      setopt localoptions NO_monitor
      coproc {
        sleep 1				# Assure disown runs first
        vcs_info			# Populate vcs_info_msg_0_
        typeset -p vcs_info_msg_0_	# Send typeset to parent
      disown %${(k)^jobtexts[(R)*vcs_info*]}
      exec {vcs_info_fd}<&p		# Get descriptor for handler
      zle -F -w $vcs_info_fd vcs_update_info

Then set up your prompts to include $vcs_info_msg_0_ as you normally

Aside to zsh-workers:  It's generally a good thing that the coproc
mechanism now uses the job tables, etc., but it would be nice if it
could be made to shut up about the jobs starting/finishing without
having to disable the monitor and notify options entirely.

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