Re: Running script in background - i.e. not blocking BBEdit

Wed, 23 Mar 2022 11:10:26 -0700

I don’t recall the details of this, but you may need to disown the quarto process so that bash doesn’t wait around for it to finish before exiting.
P.S.: Shell scripting is a minefield and I suggest taking a look at [shellcheck](https://www.shellcheck.net/) if you haven’t already. 

Cheers,
-sam

On 23 Mar 2022, at 4:55, Rainer Krug wrote:


Thanks Jean - these sound interesting options and definitely worth
following. But thew (especially the launch agent approach) made me
thinking: what if I background the quarto process?

I have now written the following script to start the previewer:

#!/bin/bash

quarto preview $BB_DOC_PATH &
pid=$!
pidfile=$(dirname "${BB_DOC_PATH}")/quarto.$BB_DOC_NAME.pid
echo pid: $pid
echo pidfile: $pidfile
echo $pid > $pidfile

But it has two problems:


1) I still have to click "cancel", but the previewer continues 
running,

which is nice.
2) the file .pid does not contain the pid of the quarto process


The second one, I will solve with quarto, and the first one, I can 
live
with. It would be nice, to have a message pops up which tells the user 
to

close the dialog once the preview is visible?

Thanks,

Rainer


On Tuesday, March 22, 2022 at 8:12:56 PM UTC+1 jj wrote:


Hi Rainer,


I suspect that BBEdit's Script menu will always be blocking because 
as far
as I know it uses an XPCService. (This should be checked with Bare 
Bones

support though!)

I think of 2 other options that you could try:


*Option 1. Use the menubar Script Menu.*

  • Activate the menubar Script Menu in Script Editor > Preferences 
>

General > Script Menu.

  • Create BBEdit's application scripts directory :

    % mkdir -p ~/Library/Scripts/Applications/BBEdit


  • Scripts placed in this directory should appear in the menubar 
Script
Menu when BBEdit is the frontmost application. Generally they act as 
if

they where run from the Script Editor.


  • Sometimes this allows you to do things you couldn't do from 
BBEdit's

Script menu (like restarting BBEdit for example).


*Option 2. Create a launchAgent that watches the folder containing 
your
quarto files and that executes a script whenever a file is saved and 
thus
refreshes the preview. *(Replace '<rainer>' with your user account in 
the

below paths.)


  • Save this launchAgent in 
~/Library/LaunchAgents/quarto_watcher.plist


        <?xml version="1.0" encoding="UTF-8"?>
        <!DOCTYPE plist PUBLIC -//Apple Computer//DTD PLIST 1.0//EN
    http://www.apple.com/DTDs/PropertyList-1.0.dtd>
        <plist version="1.0">
        <dict>
            <key>Label</key>
            <string>quarto_watcher</string>
            <key>ProgramArguments</key>
            <array>
                <string>/Users/<rainer>/Library/Application
Support/BBEdit/Scripts/quarto_previewer.sh</string>
            </array>
            <key>WatchPaths</key>
            <array>
                <string>/Users/<rainer>/Documents/Quarto</string>
            </array>
        </dict>
        </plist>

  • Save this script in ~/Library/Application
Support/BBEdit/Scripts/quarto_previewer.sh and give it the execution
permission.

        #!/usr/bin/env sh


        DOCPATH=$(osascript -e 'tell application "BBEdit" to (URL of 
first

document) as string')
        EXTENSION="${DOCPATH##*.}"

        #echo $DOCPATH
        #echo $EXTENSION

        if [ $EXTENSION == "quarto" ]; then
            /usr/bin/open -a quarto "$DOCPATH"
        fi


  • Create the /Users/<rainer>/Documents/Quarto directory. (Or some 
other

directory and change the launchAgent accordingly.)

  • Start the launchAgent in the terminal with:

     % launchctl load
/Users/<rainer>/Library/LaunchAgents/quarto_watcher.plist

  • Now whenever a file with extension ".quarto" is saved in the
~/Documents/Quarto directory, the quarto_previewer.sh script should
execute and open or reload this file in quarto.

HTH

Jean Jourdain

On Tuesday, March 22, 2022 at 2:52:19 PM UTC+1 Rainer Krug wrote:


I have an using quarto <https://quarto.org> to render technical
documents (it is very nice!) and writing them in BBEdit.


Now I have a script which I want to start from BBEdit as I do with 
all
scripts, but this script runs continuously and updates the preview. 
I would
very much like to have this in BBEdit (in the Scripts Menu), but 
when I

start this script, it blocks BBEdit.


Is there a way of having that dialog non-blocking? Or is there 
another
way of running that script (at the moment I am running it from a 
different

terminal)?

Thanks.


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