in my opinion, this is the way to do this properly
• you won’t have to repeat too much in the future (upgrades)
• you won’t have copies which is always a bad idea
after all, that’s one of the use cases profile scripts are meant for
Am 23.04.20 um 13:17 schrieb chris burke:
In addition to Ian's suggestions, you can also set up different
profile scripts each with its own config directory. This way the
sessions can be distinguished by color, position, J version etc. This
also helps with different applications.
On Thu, Apr 23, 2020 at 3:39 AM Ian Clark <[email protected]> wrote:
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 <[email protected]> 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 <[email protected]> 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 <[email protected]> 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
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