scripting/headless: update for new reality

See fiji/fiji#416.

Author: ctrueden

_pages/scripting/headless.md

@@ -9,13 +9,13 @@ project: /software/imagej2
 To start ImageJ2 headless mode, run (with the launcher appropriate for your system substituted):
 
 ```ssh
-./ImageJ-linux64 --ij2 --headless
+./ImageJ-linux64 --headless
 ```
 
 By default, when ImageJ2 runs headlessly it acts like a one-off program: it will only perform the requested operations, then quit. To run a script headlessly, use:
 
 ```ssh
-./ImageJ-linux64 --ij2 --headless --run path/to/script [key1=value1,key2=value2,...]
+./ImageJ-linux64 --headless --run path/to/script [key1=value1,key2=value2,...]
 ```
 
 {% include notice icon="warning" content='In many cases, it is necessary to enclose the entire list of key/value pairs in single quotes, to avoid shell expansion. See the following examples.' %}
@@ -33,23 +33,21 @@ print('Hello ' + name)
 we could run this script with the command on [Linux](/platforms/linux):
 
 ```ssh
-./ImageJ-linux64 --ij2 --headless --console --run hello.py 'name="Mr Kraken"'
+./ImageJ-linux64 --headless --run hello.py 'name="Mr Kraken"'
 ```
 
 Note that the `name` parameter must be enclosed in double quotes, since it is a string literal.
 
-The optional `--console` argument allows to have `print`, `IJ.log` and error statements returned to the console window.
-
 On [Windows](/platforms/windows) systems, single/double quotes might be inverted though, such that strings are enclosed in single quotes while the list of argument as well as the path to the py script are in double quotes.
 
 ```ssh
-ImageJ-win64.exe --ij2 --headless --console --run "PathTo/hello.py" "name='Mr Kraken'"
+ImageJ-win64.exe --headless --run "PathTo/hello.py" "name='Mr Kraken'"
 ```
 
 On [macOS](/platforms/macos) systems, the command can run in with the same quoting as on Linux:
 
 ```ssh
-./ImageJ-macosx --ij2 --headless --console --run hello.py 'name="Mr Kracken"'
+./ImageJ-macosx --headless --run hello.py 'name="Mr Kracken"'
 ```
 
 ## Multiple parameters
@@ -65,22 +63,22 @@ print('Hello ' + name1 + " and " + name2)
 then these are filled by using a comma-separated list of parameter pairs—e.g.:
 
 ```ssh
-./ImageJ-linux64 --ij2 --headless --console --run hello.py 'name1="Mr",name2="Mrs Kraken"'
+./ImageJ-linux64 --headless --run hello.py 'name1="Mr",name2="Mrs Kraken"'
 ```
 
 Similarly for Windows (again respect single/double quotes) or macOS,
 
 ```ssh
-ImageJ-win64.exe --ij2 --headless --console --run "PathTo/hello.py" "name1='Mr', name2='Kraken'"
-./ImageJ-macosx --ij2 --headless --console --run hello.py 'name1="Mr",name2="Mrs Kraken"'
+ImageJ-win64.exe --headless --run "PathTo/hello.py" "name1='Mr', name2='Kraken'"
+./ImageJ-macosx --headless --run hello.py 'name1="Mr",name2="Mrs Kraken"'
 ```
 
 ## Controlling the Updater
 
 To prevent unnecessary server connections to update sites in headless mode you can set the `imagej.updater.disableAutocheck` java parameter `true`:
 
 ```ssh
-./ImageJ-linux64 -Dimagej.updater.disableAutocheck=true -- --ij2 --headless --console --run hello.py 'name="Mr Kraken"'
+./ImageJ-linux64 -Dimagej.updater.disableAutocheck=true -- --headless --run hello.py 'name="Mr Kraken"'
 ```
 
 Often headless mode is used to run many scripts in parallel that could result in huge numbers of server connections. Setting this parameter will prevent this issue. This parameter does not persist between launches and must be included every time server connections to update sites should be prevented.
@@ -89,7 +87,7 @@ If desired, the updater can be controlled in headless mode using the following c
 
 ```ssh
 ./ImageJ-linux64 --update add-update-site BAR https://sites.imagej.net/Tiago/
-./ImageJ-linux64 --ij2 --headless --update update
+./ImageJ-linux64 --headless --update update
 ```
 
 You can also add multiple update sites in a single command line: