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-rw-r--r--doc/plugins/write.mdwn14
1 files changed, 13 insertions, 1 deletions
diff --git a/doc/plugins/write.mdwn b/doc/plugins/write.mdwn
index 668f8d8b6..133030f08 100644
--- a/doc/plugins/write.mdwn
+++ b/doc/plugins/write.mdwn
@@ -609,10 +609,22 @@ page created from it. (Ie, it appends ".html".)
Use this when constructing the filename of a html file. Use `urlto` when
generating a link to a page.
-#### `add_depends($$)`
+#### `add_depends($$;@)`
Makes the specified page depend on the specified [[ikiwiki/PageSpec]].
+By default, dependencies are full content dependencies, meaning that the
+page will be updated whenever anything matching the PageSpec is modified.
+This default can be overridden by additional named parameters, which can be
+used to indicate weaker types of dependencies:
+
+* `presence` if set to true, only the presence of a matching page triggers
+ the dependency.
+* `links` if set to true, any change to links on a matching page
+ triggers the dependency. This includes when a link is added, removed,
+ or changes what it points to due to other changes. It does not include
+ the addition or removal of a duplicate link.
+
#### `pagespec_match($$;@)`
Passed a page name, and [[ikiwiki/PageSpec]], returns true if the