As a proof of concept, I added an rsync post-commit hook after
ikiwiki's usual. It worked, just not for web edits, which is how
the wiki will be used. So I wrote this plugin to finish the job.
-The wiki now lives on (1), and clicking "edit" just works.
+The wiki now lives on (1), and clicking "edit" just works. --[[schmonz]]
+
+> Just out of interest, why use `rsync` and not `git push`. i.e. a
+> different setup to solve the same problem would be to run a
+> normal ikiwiki setup on the universities server with its git
+> repository available over ssh (same security setup your using
+> for rsync should work for git over ssh). On the cgi-capable server,
+> when it would rsync, make it git push. It would seem that git
+> has enough information that it should be able to be more
+> network efficient. It also means that corruption at one end
+> wouldn't be propagated to the other end. -- [[Will]]
+
+>> Hey, that's a nice solution. (The site was in svn to begin with,
+>> but it's in git now.) One advantage of my approach in this particular
+>> case: server (1) doesn't have `git` installed, but does have `rsync`,
+>> so (1)'s environment can remain completely untweaked other than the
+>> SSH arrangement. I kind of like that all the sysadmin effort is
+>> contained on one host.
+>>
+>> This plugin is definitely still useful for projects not able to use
+>> a DVCS (of which I've got at least one other), and possibly for
+>> other uses not yet imagined. ;-) --[[schmonz]]
+
+----
+
+Revew: --[[Joey]]
+
+* I think it should not throw an error if no command is set. Just don't do anything.
+* If the rsync fails, it currently errors out, which will probably also leave
+ the wiki in a broken state, since ikiwiki will not get a chance to save
+ its state. This seems fragile; what if the laptop is offline, or the
+ server is down, etc. Maybe it should just warn if the rsync fails?
+* Is a new hook really needed? The savestate hook runs at a similar time;
+ only issue with it is that it is run even when ikiwiki has not
+ rendered any updated pages. Bah, I think you do need the new hook, how
+ annoying..
+
+> * Depends whether the plugin would be on by default. If yes, then yes.
+> If the admin has to enable it, I'd think they'd want the error.
+> * Changed the other errors to warnings.
+> * The name might be wrong: there isn't anything rsync-specific about the
+> plugin, that's just the command I personally need to run. --[[schmonz]]
+
+>> One problem with the error is that it prevents dumping a new setup file with
+>> the plugin enabled, and then editing it to configure. ie:
+
+ joey@gnu:~>ikiwiki -setup .ikiwiki/joeywiki.setup -plugin rsync -dumpsetup new.setup
+ Must specify rsync_command
+
+> rsync seems by far the most likely command, though someone might use something
+> to push via ftp instead. I think calling it rsync is ok. --[[Joey]]