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|Select an editor|
The simplest way to tell edit/1 to use a specific editor is using the
prolog flag editor, which can be set in the system or personal
initialisation file. Two values have a special meaning. If the value
starts with a $, it is taken as the name of an environment variable,
$EDITOR, thus following the Unix convention to use this
variable for selecting an editor. The value
pce_emacs (default if XPCE
is available) causes the internal Emacs clone to be used. Some examples:
|:- ||Use PceEmacs|
|:- ||Windows: use wordpad|
If the editor is not known to SWI-Prolog, it will open the file, but not locate the editor to source-locations. To tell Prolog how to open a file and jump to a specified line, add a clause to prolog_edit:edit_command/2 . See the example below. See library/edit.pl for details.
:- multifile prolog_edit:edit_command/2. edit_command(myedit, '%e --line=%d "%f"').
On Windows, using plwin.exe use Settings/User init file... from the menu. On first use it will ask you whether it should install the default profile. Confirm this and edit the result.
On systems using XPCE you can achieve the same from the SWI-Prolog help
window opened with the
?- help. command.
For non-windows users, see PlInitialisation for how Prolog locates its customisation files.