Optional arguments can save typing. Mandatory arguments are more
easily discoverable: just run the command and answer its prompts.
Empire traditionally uses optional arguments only for expert features.
Consider mission:
[0:640] Command : mission
Ship, plane or land unit (p,sh,la)? s
ship(s)? 0
Mission (int, sup, osup, dsup, esc, res, air, query, clear)? int
operations point? .
frg frigate Early Bird(#0) on an interdiction mission, centered on 21,-3, radius 0
1 ship
Compare retreat:
[0:638] Command : retreat
ship(s)? 0
shp# ship type x,y fl path as flt? flags
0 frg frigate 21,-3
1 ship
Arguments are not discoverable this way.
Change retreat to work like mission: make the second argument
mandatory, and if it's 'q', show retreat orders, else treat it as path
and ask for conditions:
[0:637] Command : retreat
ship(s)? 0
Retreat path, or q to query? jj
Retreat conditions ('?' to list available ones)? i
shp# ship type x,y fl path as flt? flags
0 frg frigate 21,-3 jj i
1 ship
To reduce smart client and script breakage, keep retreat with one
argument working as before, but print a deprecation warning.
Signed-off-by: Markus Armbruster <armbru@pond.sub.org>
--- How to build the info pages ---
Make remakes info pages, table of contents and index automatically.
This requires Perl 5 and troff. To remake just formatted info pages,
run make info.
To remake HTML info, run make html. This is not done by default. The
recommended start page is TOP.html, but you may also like all.html.
--- How to add a new info page ---
To create a new info page, follow these steps:
1. Decide which chapter to put your info page in:
Commands - Empire Commands
Concepts - Game concepts
Introduction - General info about playing Empire
Server - Info about the server
2. Decide what to call your info page:
- If it's an Empire command, give it the same name as the command
as listed in lib/player/empmod.c
- Info names are case-insensitive. Make sure there isn't another
one that differs only in case.
- Make sure your info page doesn't have the same name as an existing
subject or chapter.
3. Format your info page.
The file name for a page NAME must be NAME.t. It's easiest to start
with an existing file.
The first line must be a title header:
.TH arg1 arg2
- arg1 should be the chapter, one of: Command, Concept,
Introduction, Server
- arg2 is the title of your page. If it contains more than one
word, make sure it's in double quotes
- if the info page is for an Empire command, then arg2 must be the
command name in ALL UPPERCASE.
The second line must be a name header:
.NA arg1 arg2
- arg1 must be the name
- arg2 is a one-line description of the info page which will be put
on the subject pages that your info page belongs to. It should be
in double quotes
The third line must be a level header:
.LV arg
- arg must be a level, one of Basic, Expert, Obsolete
The last line should be a see also:
.SA "item1, item2, ..., subject1, subject2"
- the stuff in quotes is a list of other info pages which are
related to this page, and subjects to which this page belongs.
- the stuff in quotes must all be on the same line
- You must include at least one subject in the list (at the end of
the list by convention). Valid subjects are listed in
info/subjects.mk.
The lines in between can contain troff requests. The following
additional requests are available:
Empire command syntax:
.SY "command <ARGS>"
An Empire command example:
.EX "command args"
No Formatting:
.NF
this stuff
won't be formatted
.FI
Begin paragraph:
.s1
Item in a description:
.L
Fancy troff magic is prone to break HTML output.
4. Format your info page, update table of contents and index
Run make info html. If it fails, peruse the error messages and fix
your info page.
==APPENDIX A - What exactly the Perl scripts do==
The scripts read all of the info pages and create a two-level table of
contents for them, organized by subject. An info page belongs to a
subject if that subject appears as an entry in the .SA ("SEE ALSO")
field of the info page.
The output of these scripts is a bunch of .t files. The file TOP.t is
the top-level table of contents and lists all of the subjects. Then
for each SUBJECT, a SUBJECT.t file is created, listing all of the info
pages that belong to it.
==APPENDIX B - The checklist.pl script==
FIXME This does not work at the moment
This little perl script compares the "list" of legal Empire commands
in your server with the Empire commands documented in info. To run
it, login to your game and type:
[##:##]% list > list.out
Then, move the list.out file to this directory and run checklist.pl.