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-I'm working on an [[rcs]] plugin for CVS, in order to integrate ikiwiki at sites where that's all they've got. What's working so far: web commit (post-commit hook and all), diff, add (under certain conditions), and remove. What's not working: with rcs_add(), iff any of the new page's parent dirs aren't already under CVS control and the post-commit hook is enabled, the browser and ikiwiki stall for several seconds trying to add it, then time out. (If I kill ikiwiki when this is happening, it cvs adds the topmost parent that needed adding; if I wait for timeout, it doesn't. I think.) If I disable the post-commit hook and do the same kind of thing, the page is created and saved.
+I'm working on an [[rcs]] plugin for CVS, adapted from `svn.pm`, in order to integrate ikiwiki at sites where that's all they've got. What's working so far: web commit (post-commit hook and all), diff, add (under certain conditions), and remove. What's not working: with rcs_add(), iff any of the new page's parent dirs aren't already under CVS control and the post-commit hook is enabled, the browser and ikiwiki stall for several seconds trying to add it, then time out. (If I kill ikiwiki when this is happening, it cvs adds the topmost parent that needed adding; if I wait for timeout, it doesn't. I think.) If I disable the post-commit hook and do the same kind of thing, the page is created and saved.
In case you're lucky enough not to know, cvs adds on directories are weird -- they operate immediately against the repository, unlike file adds:
$ cvs add randomdir
Directory /Users/schmonz/Documents/cvswiki/repository/ikiwiki/randomdir added to the repository
+I was able to work out that when I'm seeing this page save misbehavior, my plugin is somewhere inside `system("cvs", "-Q", "add", "$file")`, which was never returning. If I changed it to anything other than cvs it iterated correctly over all the parent dirs which needed to be added to CVS, in the proper order. (cvs add isn't recursive, sadly.)
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Can you offer an educated guess what's going wrong here? --[[Schmonz]]
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+> Got `rcs_recentchanges` working, believe it or not, thanks to [cvsps](http://www.cobite.com/cvsps/). If I can figure out this interaction between the post-commit hook and `cvs add` on directories, the CVS plugin is mostly done. Could it be a locking issue? Where should I be looking? Any suggestions appreciated. --[[Schmonz]]
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+>> Okay, it is definitely a locking issue. First, on the conjecture that `cvs add <directory>` was triggering the post-commit hook and confusing ikiwiki, I wrapped the ikiwiki post-commit binary with a shell script that exited 0 if the triggering file was a directory. The first half of the conjecture was correct -- my wrapper got triggered -- but the web add of `one/two/three.mdwn` (where `one` and `two` weren't existing CVS-controlled dirs) remained hung as before. There were two ikiwiki processes running. On a whim, I killed the one with the higher PID; `cvs add one` immediately completed successfully, then back to a hang and two ikiwiki processes. I killed the newer one again and then `cvs add one/two` and `cvs add one/two/three.mdwn` completed and the web add was successful. --[[Schmonz]]
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+>>> Aaaaaand I was wrong about the second half of the conjecture being wrong. The wrapper script wasn't correctly identifying directories; with that fixed, everything works. I've created a [[plugins/contrib/cvs]] plugin page. Thanks for listening. :-) --[[Schmonz]]
sipb-www / ikiwiki.git / blobdiff