diff options
| author | Joey Hess <joey@gnu.kitenet.net> | 2009-02-09 14:58:10 -0500 |
|---|---|---|
| committer | Joey Hess <joey@gnu.kitenet.net> | 2009-02-09 14:58:10 -0500 |
| commit | 6605764c523787141272fe83c3d46a65aea7649d (patch) | |
| tree | f2f4c3b598f369fce1d857ee8b74e01ac1f04a56 /doc | |
| parent | 6b41a240969d8e5b043f811c1d471402746ff0a5 (diff) | |
Fix unusual --setup --post-commit command line option combo.
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/todo/mercurial.mdwn | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/doc/todo/mercurial.mdwn b/doc/todo/mercurial.mdwn index 9635b6880..e45629102 100644 --- a/doc/todo/mercurial.mdwn +++ b/doc/todo/mercurial.mdwn @@ -31,6 +31,13 @@ This should update the working directory and run ikiwiki every time a change is The problem with --post-commit is that if you delete some pages in $SRC, ikiwiki --setup setupfile --post-commit will not delete them in $DEST. +> You should really be using a setup file that has `mercurial_wrapper` +> set, and running the wrapper generated by that from your hook. +> That will work. I think that the `--setup --post-commit` on the command +> line is currently broken and does the same expensive rebuild process as --setup +> alone (which doesn't delete files from $DEST either). Will fix that. +> --[[Joey]] + I add the following to .hg/hgrc:(I use changegroup since I don't think we need refresh per changeset, please point out if I am wrong.) [hooks] @@ -49,6 +56,24 @@ No deadlock happens. (Also I push to the $SRC from another machine, again, no d Of course these tests are too simple. The problem is I have no idea when the deadlock will happen. If someone is kind enough to point out, I will run more test. +> For the deadlock to occur, a edit has to be made via the web. +> +> Ikiwiki, +> running as a CGI, takes a lock on the wiki, and commits the edit, +> continuing to run in the background, with the lock still held. +> When the edit is committed, the hg hook runs, running `ikwiki --refresh`. +> Nearly the first thing that process does it try to lock the wiki.. +> which is already locked. This lock is taken in a blocking manner, +> thus the deadlock -- the cgi is waiting for the commit to finish before +> dropping the lock, and the commit is blocked waiting for the lock to be +> released. +> +> --post-commit avoids this problem by checking if the cgi is running +> and avoiding doing anything in that case. (While still handing the +> refresh if the commit was not made by the CGI.) +> So in that case, the commit finishes w/o ikiwiki doing anything, +> and the ikiwiki CGI handles the wiki refresh. +> --[[Joey]] *** |