Just tried it with j901 under Catalina -- it works. To make a jscript determine which jqt session it's running in: get the pid using: 2!:6'' . pid numbers ascend in value, so the latest jqt session launched will have the highest pid. Write the pid out as a textfile in (say) ~temp. The file will show the pid of the latest jqt launched, and you can compare it with 2!:6'' .
I said you could also duplicate bin/jqt.command --> bin/jqt2.command. That's not enough: you must also duplicate bin/jqt --> bin/jqt2 …And edit the duplicates (drop onto TextEdit in Dock) to make them point to each other. Then ARGV will show <'bin/jqt2' . On Thu, 23 Apr 2020 at 03:13, Ian Clark <earthspo...@gmail.com> wrote: > A more "maccy" way to do it (e.g. for jqt) is simply to duplicate jqt.app > and rename the copy to jqt2.app. > > This is more attractive to a competent Mac user, who doesn't care to > become an expert in the guts of J. > It will also work with any app file, though some of them are large (Xcode > runs to gigabytes). > jqt.app is only 83K, it's nothing but a wrapper to > launch /Applications/j64-807/bin/jqt.command > > I've just reminded myself of the steps, using j807 under El Capitan, and > they are as follows: > > 1. Locate jqt.app -- left-click the green J in the Dock and choose: > Options > Show in Finder > > 2. File > Duplicate it, to give jqt copy.app. Rename it: jqt2.app > > 3. Drag jqt2.app into the Dock and you have two green Js, which behave > like independent apps. > > HOWEVER there are gotchas… > > They both use the same *-user folder, and exactly overlay each others' > Term and Edit windows. Drag the top window away to see the one underneath > -- or click the green J in the Dock that you want. Color the windows > differently to distinguish them. > > It's a challenge to distinguish programmatically which of jqt, jqt2, is > actually running a given script. ARGV is no good: it gives <'bin/jqt' for > both. You could of course duplicate bin/jqt.command --> bin/jqt2.command > and point jqt2.app at it, but that requires brain-surgery on jqt2.app (not > hard, but a bit fiddly, and some knowledge of shell-scripting is required). > My old solution, if memory serves, was to find the pid (process ID) of the > given session in config/startup.ijs and write it into PID_z_. It's several > years since I routinely ran second copies of J, so I'll have to ferret out > the details if your client is keen to know. > > I haven't tried doing it with j901 under Catalina. I'd anticipate > Gatekeeper or permissions problems, since Catalina is stiff with booby > traps for hackers. But the above might still be made to work. > > On Thu, 23 Apr 2020 at 00:48, chris burke <cbu...@jsoftware.com> wrote: > >> In macos, clicking a desktop icon for an app that is already running >> just gives it focus. >> >> However, you can load multiple copies of J from the command line, i.e. >> something like >> >> ~/j901/bin/jqt.command >> >> Equivalently, browse to the J bin folder in Finder and double click >> jqt.command. >> >> On Wed, Apr 22, 2020 at 4:13 PM Henry Rich <henryhr...@gmail.com> wrote: >> > >> > How do you start two J sessions on a Mac? My client tells me that when >> > they click the J icon they get a J session, but when they do it again >> > they get nothing. >> > >> > Henry Rich >> > >> > -- >> > This email has been checked for viruses by AVG. >> > https://www.avg.com >> > >> > ---------------------------------------------------------------------- >> > For information about J forums see http://www.jsoftware.com/forums.htm >> ---------------------------------------------------------------------- >> For information about J forums see http://www.jsoftware.com/forums.htm >> > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
