X-Git-Url: http://git.vanrenterghem.biz/git.ikiwiki.info.git/blobdiff_plain/d766d61252777f764c12a98925474b95d50abb68..81aa58e7ca0118fbb6e1b7f53e47f01d260cdbff:/doc/todo/mercurial.mdwn

diff --git a/doc/todo/mercurial.mdwn b/doc/todo/mercurial.mdwn
index 3053bd8d3..de1f148e5 100644
--- a/doc/todo/mercurial.mdwn
+++ b/doc/todo/mercurial.mdwn
@@ -1,6 +1,3 @@
-* Need to get post commit hook working (or an example of how to use it.)
-  * See below. --[[bma]]
-* rcs_notify is not implemented (not needed in this branch --[[Joey]])
 * Is the code sufficiently robust? It just warns when mercurial fails.
 * When rcs_commit is called with a $user that is an openid, it will be
   passed through to mercurial -u. Will mercurial choke on this?
@@ -17,6 +14,10 @@
   It seems that with the current mercurial commit code, it will always
   blindly overwrite the current file with the web edited version, losing
   any other changes.
+* `rcs_commit_staged`, `rcs_rename`, `rcs_remove`, and `rcs_diff` are not
+  implemented for mercurial, and so attachments, remove and rename plugins
+  and recentchangesdiff cannot be used with it. (These should be fairly
+  easy to add..)
 
 Posthook: in `$srcdir/.hg/hgrc`, I have the following
 
@@ -32,6 +33,62 @@ This should update the working directory and run ikiwiki every time a change is
 > It can deadlock if the post-commit hook runs with --refresh in the
 > former case. --[[Joey]]
 
+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. --[[users/weakish]]
+
+> 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.
+> (fixed)
+> --[[Joey]] 
+
+>> Mercurial doesn't support put hooks in .hg/hooks/* (like git). In Mercurial, the only way to run
+>> your own hooks is specifying them in the hgrc file. (Or write a new extension.)
+>> I guess use a very long command will work.
+>> (e.g. ikiwiki --post-commit --a-lot-of-switches --set var=value $SRC $DEST)
+>> (Fortunately ikiwiki supports --set var=value so without --setup works.)
+>>
+>> Alternative is always editing via cgi or pushing.  Never work on the $SRC/repo directly.
+>> --[[users/weakish]]
+
+>>> I don't see anything preventing you from using a setup file with
+>>> `mercurial_wrapper => ".hg/ikiwiki-hook",` and then modifying the hgrc
+>>> to run that wrapper. --[[Joey]] 
+
+>> Thanks for pointing out this.  I have some stupid misunderstanding on the
+>> usage of mercurial_wrapper before.  The wrapper works nicely! --[[weakish]]
+
+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]
+    changegroup = hg update >&2 && ikiwiki --setup path.to.setup.file --refresh
+    post-commit = path.to.the.mercurial.wrapper
+
+-----
+
+I have no idea when the deadlock will happen.  --[[users/weakish]]
+
+> 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]]  
+
+
 ***
 
 I have a few notes on mercurial usage after trying it out for a while:
@@ -55,6 +112,18 @@ I have a few notes on mercurial usage after trying it out for a while:
 
 >> 1. If I clone my wiki, I won't get an exact copy of it: I will lose the recentchanges history. This could be an acceptable limitation but IMO this should be documented.
 
+>>> The history is stored in mercurial. How will it be lost?
+
 >> 2. The output of `hg status` is polluted. This could be solved trivially by adding a line containing `recentchanges` to `.hgignore`. Another alternative would be to store the `recentchanges` directory inside `$srdcir/.ikiwiki`.
 
 >> I think the ideal solution would be to build `$destdir/recentchanges/*` directly from the output of `hg log`. --[[buo]]
+
+>>>> That would be 100 times as slow, so I chose not to do that. --[[Joey]]
+
+>>>> Since this is confusing people, allow me to clarify: Ikiwiki's
+>>>> recentchanges generation pulls log information directly out of the VCS as
+>>>> needed. It caches it in recentchanges/* in the `scrdir`. These cache
+>>>> files need not be preserved, should never be checked into VCS, and if
+>>>> you want to you can configure your VCSignore file to ignore them,
+>>>> just as you can configure it to ignore the `.ikiwiki` directory in the
+>>>> `scrdir`. --[[Joey]]