diff options
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/bugs/bestlink_change_update_issue.mdwn | 26 |
1 files changed, 20 insertions, 6 deletions
diff --git a/doc/bugs/bestlink_change_update_issue.mdwn b/doc/bugs/bestlink_change_update_issue.mdwn index 211a78332..8a526e821 100644 --- a/doc/bugs/bestlink_change_update_issue.mdwn +++ b/doc/bugs/bestlink_change_update_issue.mdwn @@ -3,13 +3,27 @@ Foo/Baz, and Foo/Bar/Baz gets added, it will update the links in Foo/Bar to point to it, but will forget to update the backlinks in Foo/Baz. + The buggy code is in `refresh()`, when it determines what + links, on what pages, have changed. It only looks at + changed/added/deleted pages when doing this. But when Foo/Bar/Baz + is added, Foo/Bar is not changed -- so the change it its + backlinks is not noticed. + + To fix this, it needs to consider, when rebuilding Foo/Bar for the changed + links, what oldlinks Foo/Bar had. If one of the oldlinks linked to + Foo/Baz, and not links to Foo/Bar/Baz, it could then rebuild Foo/Baz. + + Problem is that in order to do that, it needs to be able to tell that + the oldlinks linked to Foo/Baz. Which would mean either calculating + all links before the scan phase, or keeping a copy of the backlinks + from the last build, and using that. The first option would be a lot + of work for this minor issue.. it might be less expensive to just rebuild + *all* pages that Foo/Bar links to. + + Keeping a copy of the backlinks has some merit. It could also be + incrementally updated. + * And if Foo/Bar/Baz is then removed, Foo/Bar gets a broken link, instead of changing back to linking to Foo/Baz. This old bug still exists as of 031d1bf5046ab77c796477a19967e7c0c512c417. -and now this same problem also affects link dependencies. - -(Some of) The buggy code is in `find_changed_links` -which doesn't detect that the link has changed in -this case, because when it looks at where the `%oldlinks` link to, -it does so after having updated state to add/remove the page. |