branch to fix this

diff --git a/doc/bugs/trail_excess_dependencies.mdwn b/doc/bugs/trail_excess_dependencies.mdwn
index b72adaf42170f78b5b42c97acb2618e23ba27681..6d315796e0fa1054929416a422ca485b22b3db2e 100644 (file)
--- a/doc/bugs/trail_excess_dependencies.mdwn
+++ b/doc/bugs/trail_excess_dependencies.mdwn
@@ -22,7 +22,7 @@ trail don't get rebuilt to remove the trail (both html display and state).
 > 
 > Strictly speaking, I should change `I::P::t::build_affected`
 > so it calls `prerender`, so we're guaranteed to have done the
 > 
 > Strictly speaking, I should change `I::P::t::build_affected`
 > so it calls `prerender`, so we're guaranteed to have done the

-> recalculation. I'll do that. --[[smcv]]
+> recalculation. Fixed in my branch. --[[smcv]]

 
 I think that to fix this bug, the plugin should use a hook to 
 force rebuilding of all the pages that were in the trail, when
 
 I think that to fix this bug, the plugin should use a hook to 
 force rebuilding of all the pages that were in the trail, when


@@ -33,13 +33,13 @@ the trail is removed (or changed).
 > then the logic above means it's OK, but if you
 > change the `\[[!meta title]]` of the trail, or anything else
 > used in the prev/up/next bar, the items won't show that
 > then the logic above means it's OK, but if you
 > change the `\[[!meta title]]` of the trail, or anything else
 > used in the prev/up/next bar, the items won't show that

-> change. --[[smcv]]
+> change. Fixed in my branch. --[[smcv]]

 
 There's a difficulty in doing that: The needsbuild hook runs before the scan
 hook, so before it has a chance to see if the trail directive is still there.
 It'd need some changes to ikiwiki's hooks.
 
 
 There's a difficulty in doing that: The needsbuild hook runs before the scan
 hook, so before it has a chance to see if the trail directive is still there.
 It'd need some changes to ikiwiki's hooks.
 

-> `build_affected` can fix this, I think. --[[smcv]]
+> That's what `build_affected` is for, and trail already used it. --s

 
 (An improvement in this area would probably simplify other plugins, which
 currently abuse the needsbuild hook to unset state, to handle the case
 
 (An improvement in this area would probably simplify other plugins, which
 currently abuse the needsbuild hook to unset state, to handle the case


@@ -49,6 +49,11 @@ I apologise for introducing a known bug, but the dependency mess was too
 bad to leave as-is. And I have very little time (and regrettably, even less
 power) to deal with it right now. :( --[[Joey]] 
 
 bad to leave as-is. And I have very little time (and regrettably, even less
 power) to deal with it right now. :( --[[Joey]] 
 

+[[!template id=gitbranch branch=smcv/ready/trail author="[[Simon_McVittie|smcv]]"]]
+[[!tag patch]]
+
+> I believe my `ready/trail` branch fixes this. There are regression tests.
+>

 > Here is an analysis of how the trail pages interdepend.
 >
 > * If *trail* contains a page *member* which does exist, *member* depends
 > Here is an analysis of how the trail pages interdepend.
 >
 > * If *trail* contains a page *member* which does exist, *member* depends


@@ -56,13 +61,15 @@ power) to deal with it right now. :( --[[Joey]]
 >   *trail*, or if *trail*'s "friendly" title or trail settings are changed,
 >   the trail navigation bar in *member* will pick up that change. This is
 >   now only a presence dependency, which isn't enough to make those happen
 >   *trail*, or if *trail*'s "friendly" title or trail settings are changed,
 >   the trail navigation bar in *member* will pick up that change. This is
 >   now only a presence dependency, which isn't enough to make those happen

->   correctly.
+>   correctly. [Edited to add: actually, the title is the only thing that
+>   can affect *member* without affecting the order of members.]

 >
 > * If *trail* contains consecutive pages *m1* and *m2* in that order,
 >   *m1* and *m2* depend on each other. This is so that if one's
 >   "friendly" title changes, the other is rebuilt. This is now only
 >   a presence dependency, which isn't enough to make those happen
 >
 > * If *trail* contains consecutive pages *m1* and *m2* in that order,
 >   *m1* and *m2* depend on each other. This is so that if one's
 >   "friendly" title changes, the other is rebuilt. This is now only
 >   a presence dependency, which isn't enough to make those happen

->   correctly.
+>   correctly. In my branch, I explicitly track the "friendly" title
+>   for every page that's edited and is involved in a trail somehow.

 >
 > * If *trail* has *member* in its `pagenames` but there is no page called
 >   *member*, then *trail* must be rebuilt if *member* is created. This
 >
 > * If *trail* has *member* in its `pagenames` but there is no page called
 >   *member*, then *trail* must be rebuilt if *member* is created. This


@@ -72,11 +79,15 @@ power) to deal with it right now. :( --[[Joey]]
 > { trail => next item in that trail } and { trail => previous item in
 > that trail } for each page. If either changes, the page gets rebuilt
 > by `build_affected`, with almost the same logic as is used to update
 > { trail => next item in that trail } and { trail => previous item in
 > that trail } for each page. If either changes, the page gets rebuilt
 > by `build_affected`, with almost the same logic as is used to update

-> pages that link to a changed page.
+> pages that link to a changed page. My branch extends this to track the
+> "friendly title" of each page involved in a trail, either by being
+> the trail itself or a member (or both).

 >
 > I think it's true to say that the trail always depends on every member,
 > even if it doesn't display them. This might mean that we can use
 > "render the trail page" as an opportunity to work out whether any of
 > its members are also going to need re-rendering?
 >
 > I think it's true to say that the trail always depends on every member,
 > even if it doesn't display them. This might mean that we can use
 > "render the trail page" as an opportunity to work out whether any of
 > its members are also going to need re-rendering?

+> [Edited to add: actually, I didn't need this to be true, but I made the
+> regression test check it anyway.]

 >
 > --[[smcv]]
 >
 > --[[smcv]]