This sphinx extension redirects non-existent pages to working pages. Rediraffe can also check that deleted/renamed files in your git repo are redirected.
Rediraffe creates a graph of all specified redirects and traverses it to point all internal urls to leaf urls. This means that chained redirects will be resolved. For example, if a config has 6 chained redirects, all 6 links will redirect directly to the final link. The end user will never experience more than 1 redirection.
Note: Rediraffe supports the html and dirhtml builders.