Howto:Syntax highlighting for Nasal: Difference between revisions

There is an Emacs major mode for Nasal available in SimGear, that is based on Andy Ross' [https://github.com/andyross/nasal/blob/master/misc/nasal-mode.el original version]. In order to use it, you can copy the {{simgear source

}} file where you have the rest of your manually installed packages and add the following line to your [https://www.gnu.org/software/emacs/manual/html_node/emacs/Init-File.html Emacs initialization file]:

In case you don't already have a directory to place your manually installed packages, put the file for instance in ''~/.emacs.d/manual-installs/'' (first create this directory if necessary) and insert the following in your Emacs initialization file before the above ''require'' line:

  <nowiki>;; Tell Emacs it can load ELisp files from there

(add-to-list 'load-path "~/.emacs.d/manual-installs")</nowiki>

Once this is done, restart Emacs, check that no error is reported and open a .nas file.

Optional step: in order to speed up loading of nasal-mode.el, you can open it and choose ''Byte-compile this file'' from the ''Emacs-Lisp'' menu (or equivalently, run M-x byte-compile-file).

{{Tip|In case you have a clone of the {{simgear source

| text = SimGear repository

}} on your hard drive, you may create a symbolic link from ~/.emacs.d/manual-installs/nasal-mode.el to the file inside that repository; this way, you'll get automatic updates of nasal-mode.el when your SimGear repository is updated (Emacs will ignore the .elc file resulting from byte compilation if the corresponding .el file is more recent).}}

The '''true''' and '''false''' keywords introduced in January 2023 are already supported.<ref>https://forum.flightgear.org/viewtopic.php?f=30&t=41115&p=409029#p409029</ref>