NAME¶

SYNOPSIS¶

DESCRIPTION¶

There are three principal modes:

nip2 [filename1 ...] start in GUI mode, loading the named files

nip2 -e expression [arg1 ...]
nip2 --expression=EXPRESSION [arg1 ...] start in no-GUI mode; set main = expression, set list argv to ["filename", "arg1", "arg2", ...], set argc to length of list; print the value of symbol "main" to stdout; exit

nip2 -s filename [arg1 ...]
nip2 --script=FILENAME [arg1 ...] start in no-GUI mode; read in filename as a set of definitions, set list argv to ["filename", "arg1", "arg2", ...], set argc to length of list; print the value of symbol "main" to stdout; exit; useful for running nip2 as an interpreter on unix

You can use -o to direct output to a file rather than stdout.

-o filename
--output=FILENAME the value of main is written to the named file. If main is a list, the filename is incremented between objects. You can use the suffix to specify the format and options to write in

Other options provide finer control over startup and shutdown. If you need to do something strange, don't use -e/-s, use these in combination.

-b
--batch batch (ie. non-GUI) mode

-m
--no-load-menus don't load menus, for faster startup

-a
--no-load-args don't load extra command-line arguments

-w
--stdin-ws load stdin as a workspace

-d
--stdin-def load stdin as a set of definitions

-p
--print-main print the value of main on exit. nip2 will check for a top-level symbol called main, and also check each workspace for a main

Finally some other options are useful for debugging, timing and for generating strings for internationalisation.

-V
--verbose produce verbose error messages: handy for debugging in batch mode

-i
--i18n output strings from .def files for internationalisation

-v
--version print version information

-c
--benchmark benchmark: no GUI, just start up and shut down

-t
--time-save time saves: after every image save a popup tells you the time the save took in seconds

-T
--test test: start up (including any arg processing), test for any errors, and exit with an error code if any occured. Useful for running automated tests.

-x PREFIX
--prefix=PREFIX set install prefix: start up as if nip2 had been installed to PREFIX. Useful for running automated tests without installing the thing.

EXAMPLES¶

Start nip2, loading fred.jpg.

nip2 -e "2 + 2"

Prints 4 to stdout.

nip2 -e "99 + Image_file argv?1" -o result.png fred.jpg

Load argv1 (fred.jpg), add 99, output to result.png.

nip2 -e "Matrix [[1,2],[4,5]] ** -1" -o poop.mat

Invert the 2x2 matrix and write the result to poop.mat.

COPYRIGHT¶