did a scratch implementation of dependancy types, but found it more complex
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@ -12,7 +12,7 @@ unnecessary page rebuilds:
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* meta only cares if the pages are added or removed. Content change does
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* meta only cares if the pages are added or removed. Content change does
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not matter (unless show=title is used).
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not matter (unless show=title is used).
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* brokenlinks, orphans, pagecount, ditto
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* brokenlinks, orphans, pagecount, ditto (generally)
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* inline in archive mode cares about page title, author changing, but
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* inline in archive mode cares about page title, author changing, but
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not content. (Ditto for meta with show=title.)
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not content. (Ditto for meta with show=title.)
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* Causes extra work when solving the [[bugs/transitive_dependencies]]
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* Causes extra work when solving the [[bugs/transitive_dependencies]]
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@ -109,9 +109,6 @@ I propose the following. --[[Joey]]
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* `add_depends` defaults to adding a regular ("full") dependency, as
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* `add_depends` defaults to adding a regular ("full") dependency, as
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before. (So nothing breaks.)
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before. (So nothing breaks.)
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* `add_depends($page, $spec, content => 0)` adds an contentless dependency.
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* `add_depends($page, $spec, content => 0)` adds an contentless dependency.
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* Contentless dependencies are stored in `%depends_contentless` and
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`%depends_contentless_simple`, which are stored in the index similarly
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to the existing hashes.
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* `refresh` only looks at added/removed pages when resolving contentless
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* `refresh` only looks at added/removed pages when resolving contentless
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dependencies.
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dependencies.
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@ -123,3 +120,33 @@ they can be used.
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This doesn't deal with the stuff that only depend on the metadata of a
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This doesn't deal with the stuff that only depend on the metadata of a
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page, as collected in the scan pass, changing. But it does leave a window
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page, as collected in the scan pass, changing. But it does leave a window
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open for adding such a dependency type later.
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open for adding such a dependency type later.
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----
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I implemented the above in a branch.
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[[!template id=gitbranch branch=origin/dependency-types author="[[joey]]"]]
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Then I found some problems:
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* pagestats is often used with a pagespec that uses `tagged()`.
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A pure contentless dependency does not work for that, it needs to look
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at link info.
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* orphans and brokenlinks cannot use contentless dependencies because they
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need to update when links change.
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* Something simple like pagecount, that seems like it could use a
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contentless dependency, can have a pagespec that uses metadata, like
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`author()` or `copyright()`.
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Now I'm thinking about having a contentless dependency look at page
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metadata, and fire if the metadata changes. And it seems links should
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either be included in that, or there should be a way to make a dependency
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that fires when a page's links change. (And what about backlinks?)
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It's easy to see when a page's links change, since there is `%oldlinks`.
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To see when metadata is changed is harder, since it's stored in the
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pagestate by the meta plugin.
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(Alternative: Make add_depends look at the pagespec. Ie, if it is a simple
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page name, or a glob, we know a contentless dependency can be valid.
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If's more complex, convert the dependency from contentless to full. Finding
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a non-ad-hoc, non-sucky way to do that could be hard.)
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