1 [[!template id=plugin name=texinfo author="[[tschwinge]]"]]
3 [[I|tschwinge]] started writing a plugin to render
4 [GNU Texinfo](http://www.gnu.org/software/texinfo/)
5 inside the ikiwiki environment.
7 This plugin is not neccessarily meant to enable people to write arbitrary
8 wiki pages in the Texinfo format (even though that is possible, of course),
9 but rather to ease collaboration on existing Texinfo documents.
11 The plugin is available at <http://www.schwinge.homeip.net/~thomas/tmp/texinfo.pm>.
13 It's very basic at the moment, but will be improved over time.
18 ## N-to-M Mapping of Input and Output Files
20 Conventional ikiwiki [[*htmlize*ing|plugins/write#index6h3]] plugins
21 have a one-to-one mapping of input file and output file:
22 `some/where/page.mdwn` is rendered to `some/where/page.html`.
23 This can also be achieved for Texinfo files, but is somewhat
24 unusual there, when rendering them to HTML. In general, there
27 * N Texinfo input files (a main `.texi` file,
28 several helper files (`fdl.texi`, `version.texi`, ...), and
29 additional text files which are included from the main `.texi`
30 file, e.g. `history.texi`, `libfoo.texi`, `libbar.texi`. --[[tschwinge]]
32 > As far as multiple input files, you'd need to use add_depends()
33 > to let ikiwiki know that a change to any of those files should cause a
34 > rebuild of the "main" file. --[[Joey]]
36 >> (?) I'll see about a frob to get `makeinfo` provide me with a list of additional files
37 >> it used for rendering a given `.texi` file. --[[tschwinge]]
39 > I guess you'd also have to somehow deal with
40 > it wanting to render pages for each of the helper files. Not quite sure
41 > what the best way would be to avoid that. --[[Joey]]
43 >> Might it be an option to simply not render the pages that are already
44 >> being used as an `include` file for another `.texi` file?
45 >> But how to assemble that list before actually having rendered all `.texi` files?
46 >> One possibility might be to already render them at ikiwiki's *scanning* stage and
47 >> store the rendered HTML files into temporary directories, and then at ikiwiki's
48 >> *rendering* stage simply install the desired ones into the main tree and discard
49 >> the others. --[[tschwinge]]
51 * M Texinfo output files: the main `.texi` file (which `include`s
52 the other input files) is usually rendered into a (flat) hierarchy
53 of HTML files, one file per node, see the table on
54 <http://www.gnu.org/software/texinfo/manual/texinfo/html_node/#Top>
55 for an example. --[[tschwinge]]
57 > Ikiwiki is perfectly happy with a page creating other files (see eg, the
58 > img and teximg plugins, as well as the inline plugin's rss generation).
59 > The will_render() function supports that.
61 > What hasn't been done though is a page creating more than one other _page_.
62 > Perhaps you could call IkiWiki::genpage by hand for each additional page.
63 > You might also want to manipulate each data structure that tracks info about
64 > pages, adding the additional pages to them, so that they're first class
65 > pages that work as pages everywhere in ikiwiki (ie, can be inlined,
66 > appear in a site map, be linked to, etc). Not sure how to do that,
67 > and perhaps you could get away without doing it actually. --[[Joey]]
69 >> Currently I use `makeinfo --no-split` and render to stdout, so that I can
70 >> easily capture the output and stuff it into the appropriate ikiwiki data structure.
71 >> If we want to have multiple output files (which we'll eventually want to have,
72 >> to avoid having such large single-file outputs), we won't be able to
74 >> (?) Then we'll need a way to find the main output file, which
75 >> will be the one to be copied into what ikiwiki expects to be the main output
76 >> of the rendered `.texi` file.
77 >> Perhaps (again) parse the `.texi` file for a `@setfilename` statement?
78 >> The other generated files will also have to
79 >> copied somewhere (preferably into a subdirectory named alike the main file
80 >> to avoid name space collisions; but need to take care of links between the files then)
81 >> and need to be registed within the ikiwiki system.
84 There needs to be some logic to establish a mapping between the *N* input files
85 and the *M* output files.
86 (At least for web-editing via CGI this is needed: ikiwiki (currently) needs to be able
87 to deduce *one* input file from a given output file)
88 Easiest would be either to have *N = 1*
89 (plus perhaps some input files that are not meant to be editable, like `gpl.texi`)
91 *M = N* and have a (?) one-to-one mapping between *input file n* and *output file m*
92 (which is not possible in Texinfo's `makeinfo` at the moment).
98 `makeinfo --html` is being used for rendering. It creates stand-alone
99 HTML files, while ikiwiki only needs the files' `<body>`s.
101 (?) One possibility (which is what I'm doing at the moment) is to simply cut away
102 everythin until `<body>` is seen and after `</body>` has been seen. --[[tschwinge]]
107 ## Non-functional Texinfo Commands
109 Those commands are know to not work currently:
115 This is due to `makeinfo` not providing this functionality if rendering to stdout.