This blog is updated daily..
A general description is here.
HTML help is now generated dynamically using a http server running in the R process and listening on the loopback connectioninterface.
- tThe implementation is currently incomplete, for example browsing vignette directories is only minimally implemented and not much error reporting is in plac.
- Those who need to worry about security implications of such a server can disable it by setting the environment variable R_DISABLE_HTTPD to a non-empty value.
- tThose who need to worry about security implications of such a server should not use HTML help until more security measures are in place -- the server is started at first uusing the server do not need to build or install static HTML pages and can use the configure option --disable-prebuilt-html. This sets the default for installing packages. If the server is disabled and there are no static HTML pages, a page wthout links is generated dynamically.
- The documentation has not caught up with this set of changes: details may change before release.
R CMD check now check Rd crossreferences when a package is specified, if the package is available.
New debugonce() function; further, getOption("deparse.max.lines") is now observed as well when debugging, from a code suggestion by John Brzustowski. (PR#13647/8)